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[...]Wastewater fine screening Screenings treatment Grit separation Grit classification Requirements for a complete mechanical wastewater treatment plant Manually operated screens and grit traps are no longer adequate, even for small wastewater treatment plants. As the demands on biological treatment continue to rise, it has become essential to enhance the separation performance of mechanical pre-treatment processes. Solid inorganic material must be separated effectively and removed efficiently. Screens with automatic cleaning and integrated discharge systems are now essential to meet these requirements. Screenings treatment, including the washing of organic matter, dewatering, and compaction, is becoming increasingly necessary for both economic and hygienic reasons. Reliable, state-of-the-art grit separation and automatic grit discharge are essential for efficient wastewater treatment and optimal plant performance. Our HUBER Coanda Complete Plant ROTAMAT® Ro5 C offers all these mechanical wastewater treatment steps for small sewage treatment plants in one machine. Design and Function The HUBER COANDA Compact Unit is a robust, space-efficient solution for mechanical preliminary wastewater treatment, delivering reliability, efficiency, and durability in a single integrated package. A tank mounted ROTAMAT® Micro Strainer effectively removes solid material from wastewater based on its perforation size (e.g., 3 or 6 mm). The screenings are collected and transported by a screw conveyor. Inside the enclosed rising pipe, the screenings are washed, dewatered and compacted by an integrated press before being discharged into a bagger and or container. The cleaned wastewater flows by gravity into a COANDA circular grit trap. As the COANDA Tulip enters a vortex chamber, the wastewater flow is given both a tangential and radial flow direction. Air is drawn into the vortex, where it is mixed with the wastewater, enhancing the separation of grit and other solids. The combination of three effects — the COANDA effect, the tea-cup effect, and the air intake—ensures effective separation. The organic components are kept on the surface and discharged over a weir, while the grit settles in the lower trough area for removal. This process optimizes the separation of solids, improving overall treatment efficiency. The separated grit is removed through a classifying screw, statically dewatered and discharged into a container. Benefits of the HUBER COANDA Compact Unit Integrated Mechanical Treatment : Combines complete preliminary wastewater treatment in a single compact system, streamlining processes and saving space. High Capacity : Capable of handling throughputs of up to 400 gpm / 90 m³/h, ensuring reliable performance for a wide range of applications. Space-Saving Design : The compact footprint makes it ideal for installations with limited space. Enhanced Screenings Handling : Features integrated washing, dewatering, and compaction of screenings, reducing disposal volume and associated costs. Superior Grit Removal : Offers high-efficiency grit removal, improving downstream processes and protecting equipment. Durable Stainless Steel Construction : Built entirely from stainless steel, including the augers, ensuring long-lasting corrosion resistance and reduced maintenance needs. Optional Frost-Proof Design : Engineered to withstand temperatures as low as -13°F / -25°C for reliable operation in cold climates. Robust Grit Classifying Screw : Supported on both ends for stable, efficient operation and extended durability. Odor Control : The system is fully encapsulated, ensuring odor-free operation for improved environmental conditions.[...]

[...]Efficient Grit Removal with Coanda Effect for optimal flow conditions Partly reduced organic content in grit Maximum corrosion and wear resistance Optimized for maximum performance This advanced grit classifier is a reliable and efficient solution for sewage works, addressing common challenges and offering enhanced removal performance and durability. Previously designed plants, based on past experience, have often faced issues such as grit carryover due to insufficient retention time caused by plant under-sizing. This results in problems like deposits in digesters and high wear rates of pumps. On the other hand, oversizing the plant can lead to classified grit with a high organic content, which increases disposal costs and leaves the grit overly wet due to inadequate dewatering. The HUBER Coanda Grit Classifier RoSF3 incorporates a unique center Coanda inlet which radially distributes the grit for optimum settling. Leveraging the Coanda Effect, the flow into the tank is precisely controlled and can be mathematically simulated. When operating at optimal flow conditions, the grit separation efficiency reaches up to 95% for particles as small as 200 micron. Design and Function The HUBER Coanda Grit Classifier RoSF3 takes into account the difference in density between grit and organic components, which helps reduce organic contamination and allows for more efficient static dewatering of the classified grit. Thanks to its high efficiency, the RoSF3 can be much smaller in size compared to conventional classifiers, offering significant space-saving benefits while maintaining excellent performance. The grit/water mixture flows, either pumped or by gravity, into the vortex chamber, where a rotary motion is generated, enhancing the separation process by creating the ideal flow conditions for efficient grit classification. The heart of the HUBER Coanda Grit Classifier RoSF3 is the innovative Coanda Tulip. As the organically laden water flows in from the top, it adheres to the tulip's wall and is guided to the horizontal flow below the water surface by the Coanda Effect. This process helps reduce radial and tangential flows, enhancing the separation process. The difference in density between organic and mineral materials is effectively utilized, allowing for more efficient grit separation and reducing the organic contamination in the classified grit. The classifier screw transports the clean grit up an inclined plane, where it is dewatered under gravity before being discharged into a dumpster. When the plant operates under optimum conditions, the mineral residue can achieve a purity of over 90%, especially in systems with effective pre-screening and grit collection facilities. This high-efficiency process ensures minimal organic contamination and maximizes the quality of the classified grit for disposal or further processing. The Benefits of the HUBER Coanda Grit Classifier RoSF3 Exceptional grit separation up to 95% of grit with grain sizes of 200 micron Screw is supported supported at both ends to minimize wear and ensure long-lasting performance High corrosion resistance Encapsulated, odor-free plant Frost-proof option for outdoor installations in colder climates[...]

[...]Grit classifying and grit washing in a single and compact unit Lower disposal costs and volumes Utilisation of the Coanda effect ensures superior grit removal efficiency. Less than 3 % organic content High throughput capacity Proven Technology with m ore than 2,000 installations worldwide The HUBER Coanda Grit Washing Plant RoSF4 offers exceptional grit management with advanced features, ensuring reliable, efficient, and environmentally friendly operation. The HUBER Coanda Grit Washer RoSF4 integrates both grit classifying and grit washing into a single, compact unit. By utilizing the Coanda effect, the system ensures consistently high separation efficiency and excellent washing performance. This combined process effectively removes organic material from the grit, producing a cleaner, higher-quality residue while minimizing the need for separate processing steps. Design and Function Classifying with the Coanda Effect A mixture of grit, organics, and water is introduced into a vortex chamber, where rotational movement is generated. This spinning action causes the mixture to flow downward through the trumpet-shaped Coanda Tulip, where the Coanda effect facilitates efficient separation of the free organic material from the heavier grit. The result is a cleaner, more effectively classified grit, ready for further dewatering or disposal. The flow is directed along the curved inner surface of the Coanda Tulip by the Coanda effect, where the liquid adheres to the contour of the curved surface. This smooth diversion occurs without the generation of turbulent eddies, as the flow transitions from a fast rotating vertical direction to a gradually slower rotating horizontal direction. As a result, there is a high flow velocity along the inner surface of the Coanda Tulip, a moderate radial velocity just below the water surface, and a high velocity again at the weir, ensuring efficient separation of the grit from the organic matter. The solids in the flow, including grit particles and organic material, are separated as a result of the flow diversion and reduction in flow velocity. This process, which depends on the settling velocity of the particles, causes the solids to sink to the bottom of the tank. The optimized flow pattern in the HUBER Coanda Grit Washer RoSF4 ensures that more than 95% of the grit particles in the range of 200 micron are efficiently separated, resulting in highly effective grit washing and classification. Fluidised bed for outstanding grit washing The separated grit is then subjected to a washing process, where organics attached to the grit particles are removed. This occurs in the bottom section of the HUBER Coanda Grit Washer RoSF4, where a fluidized grit bed is created. Wash water is introduced into a bottom chamber, which is separated from the main grit washer tank by a perforated plate and a perforated rubber diaphragm. The wash water flows upward through the diaphragm, distributing evenly across the bottom of the tank and generating the fluidized grit bed. Within this bed, the grit particles rub against each other, effectively scrubbing off attached organic material. This washing process is enhanced by a central stirrer that keeps the particles in motion, ensuring continuous agitation and maximizing the removal of organic contaminants from the grit. The result is clean, thoroughly washed grit with a minimal amount of organic material attached, ready for further processing or disposal. After the organic material has been effectively removed, the clean grit is transported through a classifying screw, where it is statically dewatered and then discharged into a container for disposal. The organic material that remains in the HUBER Coanda Grit Washer RoSF4 is removed automatically, but in an intermittent process, depending on the overall flow and operational conditions. This ensures that the plant maintains a defined separation capacity, optimizing the performance of the system while maintaining consistent operation. The continuous separation of grit from organics, along with its effective washing and dewatering, guarantees that the system operates efficiently, with minimal maintenance required and a high-quality end product that meets industry standards for grit disposal and environmental protection. The Benefits of the HUBER Coanda Grit Washing Plant RoSF4 No additional preceding screening required (e.g. < 6 mm) High grit and gravel yield o ptimized for maximum recovery Versatile Applications s uitable for treatment of grit from sewers, gully waste, road sweepings No crushing of stones and gravel inside the plant The screw is supported on both ends for minimized wear Optional c ontinuous operation features on-line grit level measurement, enabling uninterrupted grit removal even during feeding Encapsulated, odor-free plant Separate organics discharge allows for independent treatment of organics High throughput with u p to 3 tons per hour Large diameter screws for a high solids throughput Durable construction with s tainless steel stirrer and screw Proven performance with m ore than 2,000 installations worldwide give proof of customer satisfaction Easy integration designed for seamless incorporation into comprehensive treatment systems[...]

[...]Cable operated coarse screen for: Pumping station protection Seawater intake Surface water intake Sewage treatment plants The HUBER Coarse Screen TrashMax® is a highly effective solution for protecting downstream systems. It is ideally suited for pumping stations, the first treatment stage in wastewater treatment plants, industrial plants, and the inlet to power plants. This screen efficiently removes coarse and bulky materials, protecting downstream sensitive equipment and processes. The TrashMax® excels in demanding environments, providing reliable protection and minimizing the risk of damage to downstream systems due to its high-capacity screen rakes and the high operational safety due to efficient and reliable screen rack cleaning. Design and Function The HUBER Coarse Screen TrashMax® features an efficient and adaptable cleaning system designed for high-capacity screenings removal. The cleaning elements, attached to a chain system, are easily adjustable to accommodate varying requirements, enabling the removal of heavy and bulky objects. This flexibility allows the removal capacity to be tailored to meet the needs of specific installations, making it particularly beneficial for areas with high solids loads. The installation height of the HUBER Coarse Screen TrashMax® above ground level is minimal and depends only on the installation height of the screenings transport or disposal units, even for deep channels. Both ends of the cleaning rakes are securely connected to robust drive chains. Each rake is guided by two wear-resistant rollers on either side, which run smoothly in lateral guide tracks to ensure reliable and thorough screen rack cleaning. The chains are powered by sprockets mounted on a common shaft and driven by a gear motor. The rakes of the TrashMax® screen engage with the screen rack bars at the bottom dead center, first cleaning the rear of the screen rack and then the front. This operational design prevents material buildup in front of the screen, allowing even large, bulky debris to be effectively removed and transported upward out of the channel. The lower section of the HUBER Coarse Screen TrashMax® features a steep conveying segment, followed by an upper section with a gently inclined, flat discharge area. This design ensures the efficient and reliable discharge of screenings into downstream transport or disposal systems. Benefits of HUBER Coarse Screen TrashMax® Innovative combination of a front cleaned and back cleaned screen rack in a single unit Dependable removal of bulky materials with exceptional operational reliability High capacity screen rakes Precise screen rake guidance ensures effective cleaning of both the front and back of the screen rack Compact L-shaped screen Easy to retrofit into existing channels Installation without channel recesses possible Simple and easy-to-access drive unit All components in contact with the medium (excluding the drive and bearings) are constructed from immersion-pickled stainless steel Only electric power is required for operation, with no need for additional consumables like service water[...]

[...]Sewage sludge drying using a heat pump – an environmentally friendly and cost-effective solution for municipal and industrial wastewater treatment The compact containerized solution The HUBER Cold Air Dryer HPS® has been developed to efficiently, safely and cost-effectively dry sewage sludge, all within a ready-to-operate, modular containerized design. Who is the sludge dryer for? Specifically for small to medium-sized sewage treatment plants (10,000 to 50,000 p.e.) If there is no source of waste heat for drying but surplus electricity is available, for example from a solar PV system, the HUBER Cold Air Dryer HPS® really comes into its own. Due to the amendment of the Waste Sewage Sludge Ordinance (AbfKlärV), disposal costs for sewage sludge are set to rise in the foreseeable future. Drying reduces the volume and mass of sludge whilst simultaneously creating a high-calorific fuel for mono- or co-incineration. This makes an immense contribution to CO2 reduction. Compact design in combination with the HUBER Screw Press Q-PRESS® Minimal space requirements for maximum cost savings on sewage sludge disposal Integration of sewage sludge dewatering, surplus energy and sewage sludge drying operations Design of the HUBER Cold Air Dryer HPS® The compact containerized solution The HUBER Cold Air Dryer HPS® has been developed to efficiently, safely and cost-effectively dry sewage sludge, all within a ready-to-operate, modular containerized design. No additional structure is required! The HUBER Cold Air Dryer HPS® can be delivered fully assembled in a container. No construction time No need for planning permission for a new building Minimal foundation requirements Quick to install at almost any location In buildings, the dryer can be installed with or without a container. Few interfaces ‒ plug and dry The container contains all the necessary components: Drying chamber Fans Heat pump Control cabinet with control technology All that remains to be connected is: Electrical power supply Sludge supply Dry sludge removal Condensate removal Cooling water How does sludge drying with a heat pump work? The process runs continuously in a closed loop. Evaporator: Moist air from the dryer flows over the heat exchanger, causing the refrigerant to evaporate. Compressor: The refrigerant is compressed, causing the pressure and temperature to rise. Condenser: Here, energy is released again, heating the process air for drying. Expansion valve: The refrigerant expands via the valve and is regulated to a constant, defined superheat after the evaporator. The drying process ‒ step by step The sludge is fed onto the drying belts. The sewage sludge is evenly applied to perforated conveyor belts. The sludge dries on the belts. Water evaporates by convection. Cooling and condensation. The moist air is condensed by passing through heat exchangers. The air flow is heated. The air is heated by the liquefaction of the refrigerant. A recirculation fan compensates for pressure loss. Warm, dry air is directed to the belts.[...]

[...]Well-Proven Mechanical Preliminary Treatment Equipment High Grit Separation Efficiency: Delivers excellent grit separation performance, ensuring high-quality wastewater treatment. Large Scum Separator: Features an automatic grease removal system for effective scum separation. Optional Grit Washing: Offers the flexibility of integrated grit washing for enhanced waste material management. Innovative Design: The unique HUBER Complete Plant Hydro Duct ROTAMAT® Ro5 HD combines the advantages of both aerated and unaerated grit traps, providing high performance in a compact footprint. This innovative grit trap ensures efficient separation while minimizing space requirements. Design and Function The wastewater first passes through an inlet screen that retains, washes, compacts, and dewaters the solids within the flow. The screened wastewater then flows at a right angle into an aerated grit trap tank, where it generates a spiral flow. Integrated air tubes enhance the spiral flow, keeping organic particles in suspension. At the same time, grease and similar substances float to the surface within the grit trap. Next, the flow enters a second unaerated upflow grit chamber, which includes an integral Hydro Duct that ensures a directed flow from the bottom with a positive and uniform upflow distribution. The flow velocity in this chamber is reduced, allowing very fine grit to settle at the bottom, while fats, oil and grease (FOG) rises to the surface, where it is automatically removed by a reliable paddle system. The particles separated in both chambers are removed by classifying screws or grit pumps and are simultaneously dewatered or washed in a grit washer before being discharged into a dumpster. As an option, the separated grit trap material can be washed in the Complete Plant. In this case, a horizontal grit conveyor transports the separated grit directly to a grit washer integrated at the plant's outlet. To ensure efficient separation, upwardly directed service water fluidizes the grit in the lower part of the grit washer, enabling lighter organic particles to separate from the dense grit. This separation is aided by a stirrer. After the organic material is removed, the clean grit is automatically discharged via a classifying screw, statically dewatered, and sent to a container. The Benefits of the HUBER Complete Plant Hydro Duct ROTAMAT® Ro5 HD Fully integrated screenings separation, c ombines screenings separation, washing, and dewatering in one system Exceptional Grit Separation: Achieves up to 95% grit separation for particles as small as 200 micron (independently verified). High Throughput Capacity suitable for flow rates up to 3.42 MGD / 150 l/s (540 m³/h) Large surface for grease separation with automatic grease removal system Optionally integrated emergency bypass for added flexibility Optional integral grit washing system Flexible installation at grade or underground, adapting to site-specific requirements. Compact, space-saving design with a small footprint Customizable inlet screen: Multiple screenings options can be employed to suit plant needs. Durable entire stainless steel construction, including the screws[...]

[...]With aerated or optionally unaerated grit channel Grit trap designed accordance with international standards Separate grease trap with semi-automatic grease removal (optional) Integrated grit washing (optional) For reasons of operational safety the first step of sewage treatment works is generally mechanical wastewater pretreatment including: Fine screening Screenings treatment Grit separation Grit discharge Separation and removal of fat and grease Integrated grit washing Complete wastewater pre-treatment is essential for ensuring smooth operation in wastewater treatment plants, as it prevents issues like blockages, wear, or silting that can lead to costly downtime or equipment damage. The HUBER Complete Plant ROTAMAT® Ro5 was first developed and supplied in the 1980s, and since then, it has become a reliable and highly favored solution for wastewater pre-treatment. Thanks to its robust design and reliability, it has been chosen by hundreds of consulting engineers and plant operators worldwide. Planning and installation of our HUBER Complete Plant ROTAMAT® Ro5 units is not only quick and easy, but also saves considerable construction costs. In fact, they are even acknowledged as state of the art in the 4th edition of DWA’s Handbook for mechanical wastewater treatment. Design and Function The ROTAMAT® Ro5 is an all-in-one, robust, and efficient solution tailored for the complete mechanical pretreatment of wastewater. Fine screening Depending on the specific conditions and data, such as peak flow, screenings load and grit load, one of the following HUBER screens is selected: HUBER Fine Screen ROTAMAT® Ro1 ‒ Bar spacing 6 or 10 mm HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 ‒ Bar spacing 1 - 6 mm HUBER Micro Strainer ROTAMAT® Ro9 ‒ Bar spacing 1 - 6 mm HUBER Multi-Rake Bar Screen RakeMax® ‒ Bar spacing 2 - 10 mm HUBER Belt Screen Esca Max® ‒ Perforation 3.5 - 10 mm HUBER Fine Screen STEP SCREEN® SSF ‒ Slot width 3 or 6 mm Other separation sizes can be supplied on demand. Separate details are available for all of these machines. Screenings treatment The HUBER Fine Screen ROTAMAT® Ro1, Rotary Drum Fine Screen ROTAMAT® Ro2, and Micro Strainer ROTAMAT® Ro9 are equipped with an integrated screenings press for dewatering and compaction, eliminating the need for a separate wash press. Additionally, screenings washing can be achieved with the optional IRGA unit. These systems can achieve a solids concentration of up to 45% DS in the screenings. For HUBER Fine Screen STEP SCREEN® SSF, HUBER Belt Screen EscaMax® a separate HUBER Wash Press WAP® is usually installed behind these HUBER screens. Solids concentration of screenings, depending on the WAP® type used: up to 50% DS. Grit separation The grit channels of the HUBER Complete Plant ROTAMAT® Ro5 units are designed to meet international standards or customized to the specific requirements of the customer. These grit channels are available in both aerated and unaerated configurations. The choice between aerated or unaerated channels depends on several factors, including the storm-to-dry weather flow ratio and the potential for additional grit treatment systems. Grit removal and discharge The settled grit is collected from the bottom of the grit channel using a horizontal grit screw. This screw transports the grit to an inclined grit screw, where it is further conveyed, agitated, and dewatered. The classified grit is then discharged from the upper end of the inclined screw and directed into the HUBER Coanda Grit Washer RoSF4 T for further washing and treatment. If necessary, the material can also be pumped to the grit washer , ensuring flexibility depending on the system setup and operational requirements. Grease separation and removal (optional) The separation of fats and grease in the HUBER Complete Plant ROTAMAT® Ro5 is made possible through the use of aerated grit channels. In this system, the grease is collected in a separate chamber, with the partition between the grit trap chamber and the grease chamber being a slotted scum board. The aeration system within the grit trap chamber generates a flow that transports the grease through the slotted scum board into the grease chamber. Unlike many other systems, the HUBER plant employs a paddle scraper to efficiently remove the floating fats and oils. This paddle, made of stainless steel, is slowly drawn across the surface of the water using a rope mechanism. The paddle is specially shaped to ensure that virtually all floating matter is removed from the grease trap. This method prevents the anaerobic degradation of fat and grease, which can otherwise lead to unpleasant odors and other operational issues. This system provides an effective solution for grease removal, ensuring cleaner effluent and a more hygienic operation while reducing the risk of odor nuisance and the need for costly maintenance. Optional integrated grit washing In this setup, the horizontal grit conveyor directly transports the separated grit fractions into a grit washer integrated at the outlet of the Complete Plant. Upwardly directed service water is introduced to fluidize the grit at the bottom of the washer, allowing the lighter organic particles to separate from the denser grit. This separation process is assisted by a rabble rake. Once the organic material is removed, the clean grit is automatically conveyed by a classifying screw, dewatered statically, and discharged into a container. The benefits of the HUBER Complete Plant ROTAMAT® Ro5 Dependable, complete and compact headwork unit performing the following process steps: Fine screening Screenings washing (optional) Screenings dewatering Grit separation Grit dewatering Grit trap aeration (optional) Grease separation and removal (optional) Optional integrated grit washing Removal efficiency in accordance with international standards (DWA) with Qmax: 90 % of 75 mesh grit (particle diameter 0.2 – 0.25 mm) (confirmed by the University of Erlangen) Throughput capacity up to 4755 GPM / 300 l/s makes it suitable for medium to large-scale applications Separate grease chamber with automatic grease removal (optional) Fully enclosed system prevents odor nuisance Ideal for outdoor use with frost protection (optional) Above-ground or underground installation Constructed entirely of stainless steel, including screws, with acid pickling for maximum corrosion resistance More than 2,500 installations worldwide, showcasing its dependability and customer satisfaction[...]

[...]Contact Drying of Sewage Sludge Partial drying of sewage sludge for recycling in fluidized bed incineration plants. Water evaporation per dryer: 2 to 6 ton/h Dewatered sludge throughput per dryer: 6 to 12 ton/h * DR throughput capacity per dryer: 1.5 to 6.0 ton/h * Heating medium: Saturated steam up to 150 PSI / 10 bar(a) * dependent on inlet and outlet DR Thermal drying of sewage sludge is a crucial step to ensure the sludge has the proper residue. The subsequent mono-incineration of the sewage sludge results in a substantial reduction in both volume and mass, while facilitating the recovery of phosphorus. Design and Function The HUBER Disc Dryer RotaDry® is designed for homogeneous partial drying of dewatered sewage sludge. Due to its compact design and high specific water evaporation, it is not only ideally suited for use in new sewage sludge mono-incineration plants, but also for capacity expansions of existing plants. The dryer can precisely achieve the required dry residue (DR) content, ensuring self-sustaining combustion in the fluidized bed incinerator. The HUBER RotaDry® is available in various sizes, allowing for a water evaporation capacity of approximately two to six tons per hour per dryer. By selecting different disc diameters and numbers of discs, the heating surface can be optimally tailored to the amount of sludge generated, ensuring the dryer operates within its ideal capacity range. The heat required for drying is supplied, and depending on the size of the plant, electricity is also generated through steam turbines. A reliable condensate removal system , an innovative concept for moisture control, an optimized feed and a steam control line with minimized pressure loss characterize the HUBER Disc Dryer RotaDry® as the perfect sewage sludge dryer in combination with a mono-incineration plant. All dryers are optionally available with jacket heating. Vapor condensation The complete dryer system always includes the condensation of the vapors produced by the disc dryer. Depending on the the specific project requirements, there are various options available for this process. Tube bundle condenser (indirect condenser) Compact design to maximize the extraction steam for district heating, as heating water is raised to the required temperature level directly in the condenser. Injection condenser (direct condenser) Circulating and cooled vapor condensate is sprayed in the head of the condenser to knock down the condensable vapors. Robust and universal design. Multi-stage condensation system Options may include components such as a sludge preheater, which optimizes energy use and reduces polymer consumption during the dewatering process, and an injection condenser, serving as a residual condenser for further energy recovery. Steam and condensate system In order to operate the dryer as efficiently as possible, the use of saturated steam is essential. Depending on the design of the water-steam cycle, steam cooling is required in addition to steam pressure control. Thanks to the optimal configuration of the controlled system, both pressure-loss-minimized operation at nominal load and reliable regulation to the required steam pressure are ensured. Even after passing through the dryer, the liquid steam condensate is not left energetically unused; it is returned to the water-steam system. Utilizing the flash steam is recommended to further enhance energy efficiency. Vapor condensate treatment Due to the high contact temperatures between the disc surface and sewage sludge, the vapor condensate contains elevated levels of ammonium, as well as particulate and dissolved COD (Chemical Oxygen Demand). This makes immediate indirect discharge into the municipal sewage network unfeasible. Separate treatment is required, and upon request, HUBER Technology, Inc. can develop a project-specific solution for treating the vapor condensate. Ease of maintenance disc dryer Maximum reduction of the activities during walkarounds The main rotor bearings and the discharge screw bearings are supplied with automatic grease lubrication. Highly efficient direct drive with peripheral speed adjustment capability. Wear-optimized driving style and startup under load possible. Discharge screw is easily accessible and removable for replacing wear plates and screw spiral. The Benefits of the HUBER Disc Dryer RotaDry® Compact design The HUBER Disc Dryer RotaDry® stands out for its compact design, enabling it to be installed on a small footprint or seamlessly integrated into existing plants, maximizing space efficiency. Proven and reliable technology The many years of successful use of disc dryers in combination with sewage sludge incineration plants demonstrate the robust technology of the process. High specific water evaporation capacity By heating the rotor discs and optionally the jacket, the HUBER Disc Dryer RotaDry® achieves a high volume-specific water evaporation rate, enhancing the efficiency of the drying process. Competent partner Thanks to the cooperation between HUBER and OESTERGAARD, the customer is offered the best possible solution, both in terms of process and design. Maintenance-friendly dryer Minimal effort for operating personnel thanks to automatic grease lubrication and low-maintenance direct drive. Extended service life By using a special welded construction for the discs, the minimum permissible residual wall thickness can be reduced. The service life of the rotor is thus extended to a maximum. Control concept adapted to mono-incineration plants In the event of fluctuating sludge quality, the DR measured online can be included in the control. Secure condensate drainage Reliable condensate drainage from the discs due to the omission of a syphon pipe.[...]

[...]The HUBER Disc Dryer RotaDry® is designed for homogeneous partial drying of dewatered sewage sludge. Due to its compact design and high specific water evaporation, it is ideally suited not only for use in new sewage sludge mono-incineration plants, but also for capacity expansions of existing plants. The dryer can dry exactly to the required DR content, thus enabling self-sustaining combustion in the fluidised bed incinerator. The HUBER Disc Dryer RotaDry® is available in different sizes, so that a water evaporation of two to six tons per hour and dryer can be achieved. The perfect sewage sludge dryer in combination with a mono-incineration plant By using different disc diameters and numbers of discs, the dryer surface can be optimally adapted to the amount of generated sludge and the dryer can be operated in the ideal capacity range. Thermal drying of sewage sludge is an indispensable process component to ensure the sewage sludge has the right dry residue. The subsequent mono-incineration of the sewage sludge achieves an enormous reduction in volume and mass and provides for the recovery of phosphorus. At the same time, the heat required for drying is provided and, depending on the size of the plant, electricity is also generated by means of a steam turbine. A reliable condensate removal system, an innovative concept for moisture control, optimized feeding and a steam control line with minimized pressure loss characterize the HUBER Disc Dryer RotaDry® as the perfect sewage sludge dryer in combination with a mono-incineration plant. New RotaDry® trial disc dryer enables drying of sewage sludge on a pilot scale The project-specific assessment of sewage sludge drying is extremely important to assess risks and optimise process designs. For this reason, HUBER SE decided in 2021 to develop a compact trial disc dryer. Together with its cooperation partner Oestergaard, HUBER downscaled the dryer and adapted the throughput to the size of a test plant. The aim was to design a transportable dryer that can be used for testing purposes at the headquarters in Berching, Germany, as well as for more extensive tests at interested customers' sites. The limiting factor here is the sludge throughput of the dryer, as not unlimited amounts of dewatered sewage sludge can be shipped to Berching for tests. HUBER Disc Dryer RotaDry® in a 20-foot high-cube container The 20-foot high-cube container houses the disc dryer, the feed and discharge screw, a small shell-and-tube condenser and the vapour extraction fan. The HUBER Screw Conveyor Ro8 T units of size 219 are of course "Made in Berching" and have been manufactured directly in HUBER's adjacent production hall. Unlike its large, steam-heated "dryer brothers", the disc dryer is heated with thermal oil. HUBER was able to use an electrically heated thermal oil unit from its stock, which offers advantages over a steam generator, especially due to its easier handling. In addition, a control cabinet is installed in the container, which houses the electrical instrumentation and control (I&C) technology. To operate the dryer, only a 63 A power supply and cooling water are required externally. If you are interested in a customised test with the trial disc dryer, please contact HUBER Sales, Sludge Drying at sludge@huber.de .[...]

[...]Retention of filterable solids from the secondary clarifier effluent Reduction of phosphorus by upstream precipitation Preliminary filtration in drinking water recovery from surface waters and in UV disinfection applications High hydraulic loads, insufficient tank depth and poor settling behaviour of the activated sludge are the most common causes for the poor performance of secondary clarifiers. Frequently, secondary clarifiers are even unable to reliably ensure the solids retention required. Overflow of flocks increases COD, BOD and phosphorus loads in the effluent and receiving watercourse with the result of higher wastewater fees. A subsequently installed filtration system is a quick, efficient solution in order to achieve separation of suspended material, such as sludge flocks. Combined with preceding precipitation and flocculation a micro screen provides an easy-to-implement means for the reduction of phosphorus in effluents to very low concentrations. This prevents eutrophication of waters and excessive growth of algae and water plants. Design and Function Our HUBER Disc Filter RoDisc® is a filtration plant and consists of up to 35 vertical discs installed on a horizontal shaft. Up to 65% of the disc surface is submerged in the filtrate during operation. Each filter disc consists of 12 individual plastic segments equipped with two filter plates each. The filter plates are covered with filter mesh on both sides. A thermal process is applied to fix the mesh. Each segment can be exchanged individually in case the mesh should be damaged. The finest available mesh size is as small as 10 μm. Due to its small space requirement and modular design the HUBER Disc Filter RoDisc® can be tailored to suit any specific site requirements. The HUBER Disc Filter RoDisc® is a gravity-flow filtration system. The wastewater to be treated flows into the horizontal shaft and from there through openings into the filter discs which the water passes from inside to outside. The filter discs remain in rest position at first during the filtration process. The solids are retained on the inner disc surfaces, which leads to gradual blinding of the mesh, resulting in an increasing pressure differential. An overflow weir ensures that the water level in the tank remains virtually constant. The upstream water level rises as the blinding process progresses. When the predefined maximum pressure differential has been reached, the solids are removed automatically from the filter surfaces. The filter material is cleaned by spray nozzle bars. The solids are removed by the slow rotation of the filter discs combined with the high-pressure water jets which wash the filtrate through the mesh from inside to outside without the need to use fresh water as filtrate is used for backwashing. The spray water and the solids contained are collected in a trough and discharged axially from the machine. The filtration process runs on continuously whilst the filter discs are being cleaned. The Applications of the HUBER Disc Filter RoDisc® Filtration of biologically treated wastewater The HUBER Disc Filter RoDisc® is frequently utilised for the separation of fine suspended material from biologically treated wastewater within municipal and industrial applications, especially if secondary clarifiers work insufficiently because they are too small or the settling behaviour of the activated sludge is poor for example. Our HUBER Disc Filter RoDisc® reliably achieves effluent values which are significantly better than the required limit values for filterable solids. Furthermore, it achieves a further significant reduction of phosphorus concentrations. Filtration to protect or increase the efficiency of downstream treatment systems A virtually solids-free flow is a prerequisite for effective and efficient as well as trouble and maintenance free operation of some subsequent treatment steps, such as UV disinfection or membrane filtration. Our micro screens significantly reduce the concentration of suspended material. Investment and operation costs are more than compensated because micro screening saves money for downstream systems. Treatment of water and wastewater in industries Due to new legislation concerning direct or indirect wastewater discharge, advanced wastewater treatment at source is required. Removal of solids is also required for wastewater recycling because service and process water must be virtually solids-free. Special applications: Wastewater within paper and pulp industry Wastewater within plastic processing industries Treatment of service and process water, closing water loops (e.g. in food and chemical industry) Removal of microplastics The Benefits of the HUBER Disc Filter RoDisc® High hydraulic throughput capacity on a small footprint Gravity system with low headloss, no lifting of wastewater required. Significant reduction of filterable solids, COD, BOD, phosphorus. Effluent standards are reliably met. Reduced wastewater discharge charges. Form-locked and chemical-resistant thermal fixation of the mesh. No external water supply required as filtrate is used for cleaning. For installation within a stainless steel tank or in customer‘s concrete tank. Continuous operation even during backwashing. Simple individual filter element replacement without the need for lifting equipment.[...]