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[...]Advanced Wastewater Treatment HUBER solutions for removal of very fine solids and dissolved organic trace substances by means of micro screening, filtration and adsorption. Solids Retention HUBER offers proven and reliable solutions for solids retention in the outlet of wastewater treatment plants. In addition to sand and disc filters, a cloth filter is also available for polishing filtration. Phosphorus Elimination For flocculation filtration and the elimination of phosphorous, HUBER offers reliable and proven process technology, which ensures that the respective phosphorus limits to be complied with can be safely met. Biological Activated Filtration With downstream denitrification in a sand filter during municipal wastewater treatment, nitrate limit values can be reliably met. Elimination of Trace Substances HUBER offers solutions for the elimination of trace substances and micropollutants from wastewater with granulated activated carbon (GAC) and powdered activated carbon (PAC). Membrane Activated Process The membrane activated sludge process is a biological wastewater treatment process that works according to the principle of the activated sludge process, but the secondary sedimentation tank for biomass retention is replaced by membrane filtration unit. The wastewater treatment process of a conventional municipal sewage treatment plant consists of a mechanical and a subsequent biological treatment stage. Increasing demands on the quality of the treated wastewater, however, increasingly require additional treatment stages, which are often referred to as third and fourth treatment stages, or collectively as “advanced wastewater treatment”. The goal of advanced wastewater treatment is the reduction of one or more of the following pollutants: solids, COD, BOD, phosphorus, nitrate, micropollutants and germs. HUBER is a competent partner for the implementation of different processes for advanced wastewater treatment: Solids reduction : reduction of suspended solids, COD and BOD before discharge of the wastewater into the receiving water or as a preliminary stage for further treatment Phosphorus elimination : reduction of phosphorus before discharge of treated wastewater into water bodies Micropollutant elimination : adsorptive and oxidative removal of micropollutants Biologically activated filtration : denitrification in sand filters Membrane activated sludge process : solids-free treated wastewater FAQ Frequently Asked Questions What is meant by tertiary treatment? In wastewater treatment, tertiary treatment means the third treatment stage and refers to processes of advanced wastewater treatment in which a further reduction of nutrients (nitrogen and/or phosphorus) takes place. The first two stages of wastewater treatment are mechanical treatment (primary treatment) and biological treatment (secondary treatment). What is meant by quaternary treatment? In wastewater treatment, quaternary treatment means the fourth treatment stage and refers to processes of advanced wastewater treatment in which micropollutants are eliminated. The first three stages of wastewater treatment are mechanical treatment (primary treatment), biological treatment (secondary treatment) and phosphorus and/or nitrogen elimination (tertiary treatment).[...]

[...]Seefelden, Germany The Seefelden sewage treatment plant in the Überlinger See wastewater association on Lake Constance with 70,000 population equivalents is to receive advanced wastewater treatment to remove trace substances. The heart of the new treatment stage will be a process combination of ozonation and activated carbon filtration – on a technical scale that has never been realized in Germany before. For this showcase project, HUBER will supply 24 Active Carbon Filters CONTIFLOW® GAK for biological post-filtration and adsorption of trace substances after the ozonation stage. Investment volume 7.4 million euros: Construction started in spring 2021, planned commissioning in fall 2022 Construction of the new treatment stage, which will in future treat an average of 650 m³ of wastewater per hour, corresponding to an annual volume of around 5.6 million m³, began as early as spring 2021. Commissioning of the project, in which the wastewater association (“Abwasserzweckverband”) is investing 7.4 million euros, is scheduled for fall 2022. Chief Technology Officer Dr. Johann Grienberger: “This project is a role model – for Germany and worldwide” “Advanced wastewater treatment must and will become an even more important topic in the coming years,” says Dr. Johann Grienberger, Chief Technology Officer of HUBER SE. “HUBER is already supplying its technologies and products for the reliable elimination of micropollutants in wastewater in a number of projects – and the renovation of the Seefelden wastewater treatment plant is one of them. It is Germany’s largest combined process for the removal of trace substances and serves as a role model: not only for the whole of Germany, but worldwide.” HUBER Active Carbon Filter CONTIFLOW® GAK: Adsorptive elimination of micropollutants from the wastewater stream using granulated activated carbon The HUBER Active Carbon Filter CONTIFLOW® GAK is an upflow activated carbon adsorber filled with granulated activated carbon. It removes micropollutants from the wastewater stream adsorptively and operates in continuous mode. This means that no feeding pauses are necessary for the cleaning of the activated carbon. As the influent flows slowly through the activated carbon bed from bottom to top, dissolved organic substances such as trace contaminants are adsorbed onto the large inner surface of the activated carbon. The purified water flows out through a weir in the upper part of the filter. As the pressure drop increases, the activated carbon is gently conveyed from the bottom of the hopper into the scrubber at the top, where it is freed from residual particulate matter. The particles are separated with a small partial flow, the so-called wash water. The activated carbon, cleaned of solids but still partially loaded with micropollutants, then falls back down onto the filter bed, creating an internal activated carbon cycle. As operation progresses, the loading of the internal surface of the carbon slowly increases. 135 million cubic meters of drinking water annually for four million people: Advanced wastewater treatment separates out hazardous trace substances Thanks to the introduction of advanced wastewater treatment at the Seefelden wastewater treatment plant, hazardous persistent trace substances such as pharmaceutical residues, hormones and flame retardants will be reliably separated in the future, even before they enter Lake Überlingen. This part of Lake Constance supplies around four million people in large parts of Baden-Württemberg with around 135 million m³ of drinking water every year. Former Minister of the Environment of Baden-Württemberg: “Are a model nationwide” “This is good news for the Lake Constance district and for water protection in the state,” said former Environment Minister Franz Untersteller in the official press release from the Baden-Württemberg Ministry for the Environment, Climate and Energy Management. “We are a role model nationwide in this regard and are doing a great deal in this way to preserve and strengthen the ecological habitat of water bodies, which is of outstanding importance, especially at Lake Constance.” As a precautionary measure, he said, the ministry began equipping wastewater treatment plants on particularly sensitive bodies of water with the fourth treatment stage several years ago.[...]

[...]Reliable water intake systems for open waters HUBER offers its customers a comprehensive portfolio of innovative mechanical treatment systems for water intakes, for both new plants and the modernization of existing plants. The systems are customized to the individual needs and the required water quality of each project. Customers benefit from our decades of expertise for particularly stable, reliable, and fully automated machines with the best hydraulic properties for maximum separation rates. Depending on the application and installation challenge, our solutions include multi-stage screens and screening systems that are optimally matched to each other. Process Technology HUBER solution for water intake Preliminary screening Preliminary screening is the first step in any water extraction process to remove large or medium-sized pollutants of more than 0.4 in. / 10 mm, such as leaves, tree trunks, plastic containers, plastic film, debris, seaweed, and jellyfish. Mainly grab screens and multi-rake bar screens are used for this purpose. HUBER Grab Screen TrashLift HUBER Coarse Screen TrashMax® HUBER Multi-Rake Bar Screen RakeMax® V Fine screening For the removal of fine contaminants in the range of 0.04 in. up to 0.4 in. / 1 mm up to 10 mm, self-cleaning and fully automatic belt filter screens are mainly used. They are suitable for filtering large flow rates in a water intake with a relatively fine degree of filtration. Depending on the required clean water quality of the downstream processes, the screen elements are equipped with filter mesh or with perforated plate. This ensures optimum reliability with maximum efficiency. HUBER belt filter screens are available in all sizes, layouts, and flow rates. Depending on the flow direction, a distinction is made between HUBER Band Screen CenterMax® : Screen of the "center-flow" type. The filter elements are installed parallel to the flow direction of the water intake and move vertically. The water flows from the inside to the outside. HUBER Band Screen DualMax® : Screen of the "dual flow" type. The filter elements are installed parallel to the flow direction of the water intake and move vertically. The water flows from the outside to the inside. HUBER Band Screen DiscMax® : Screen of the "through-flow" type. The filter elements are installed in the direction of flow and move vertically. The water flows in a straight line through the filter belt screen. Micro screening For applications requiring high purity and removal of finest particles in the range of a few micron, such as mussel larvae, a micro screen is available as an option. HUBER Drum Screen LIQUID HUBER Disc Filter RoDisc® Shut-off devices In addition to screen technology, HUBER also supplies shutoff devices as penstocks, and stop logs for regulating water flows during water abstraction, and for maintenance of water intake infrastructures. The stop logs and penstocks withstand highest water pressures and have a high load capacity even with hard and bulky debris in the water.[...]

[...]Screens and Fine Screens Reliable screens for any application Innovative technology from one source Reliable screens for any application Innovative technology from one source All HUBER Screens and Fine Screens Categories ROTAMAT® Screens Bar Screens Belt Screens Rope and Chain Pull Rakes STEP SCREEN® Ultra Fine Screens Sludge Acceptance Plants Stormwater Screens The HUBER screening program comprises a wide variety of screen systems and enables us to offer the perfect solution for any installation conditions, flow rates, bar spacings and mesh sizes. Mechanical treatment is indispensable as the first process step of preliminary treatment of wastewater, both for STP inlets and other fields of application, such as process water treatment. Coarse material has to be removed in order to protect the subsequent treatment steps against damage/pollution. It is the goal to completely separate floating, settling and suspended material, depending on the screening elements size, and remove the material prior to discharging it. Hygienic conditions and the requirement for safe operation and low maintenance is becoming increasingly important. For municipal STPs additional screenings washing is utilised to enhance downstream biological treatment. FAQ Frequently Asked Questions What influences the separation efficiency of screens? The size of the opening width on the one hand and the shape of the screening element on the other. With one-dimensional screening elements such as bars, the separation efficiency is generally lower than with two-dimensional elements such as perforated plates, mesh, etc. This is mainly due to the fact that it is very difficult for long-fibre material such as hair to pass through a perforated plate. Which screen type can be used as both a coarse screen and a fine screen? This requirement can only be met by a screen that covers the full range of screen opening widths from fine to coarse screens. In addition, the screen bars must be designed with the respective geometry to meet the corresponding requirement. A typical screen that fulfills all these requirements is our HUBER Multi-Rake Bar Screen RakeMax® Which screens are particularly suitable for deep channels? Machines with a steep installation angle are best suited for such applications. This screen installation option allows the installation space to be very compact, especially in the direction of flow. Typical examples are our HUBER Multi-Rake Bar Screens RakeMax® and RakeMax® CF as well as the HUBER Belt Screen EscaMax® , HUBER Coarse Screen TrashMax® and HUBER Grab Screen TrashLift .[...]

[...]Reducing screenings volume and disposal costs The screenings from municipal wastewater treatment mainly consist of household waste-like materials, feces, paper, and mineral particles. The screenings volume depends on the aperture size of the screening system. The solids content of municipal, untreated screenings varies from 5 – 20 %, depending on the type of screen. The organics contained in the screenings amount on average to approx. 90 % of the dry residue [DR]. The objectives of screenings treatment are: Dewatering of the screenings and thus reduction of screenings weight and volume. This also reduces the disposal costs for the screenings. Return of easily degradable carbon to the wastewater treatment process. Improving hygiene conditions for sewage treatment plant personnel. Wash Presses The best screenings treatment is the screenings wash press By adding wash water and mechanical energy, feces, and suspended organic matter are washed out of the screenings in a wash press and returned to the wastewater, thus positively influencing the C / N ratio of the wastewater to be treated. After washing, the screenings are well compacted so that the water content in the washed screenings is significantly reduced. Depending on the selected washing process and press type, a weight and volume reduction of up to 80 % can be achieved. The weight and volume reduction also means a reduction in disposal volume and thus directly influences the costs that have to be paid for the disposal of screenings. HUBER has extensive experience in the design of screenings treatment plants and has different types of wash presses in its product program. HUBER also has the right solution for transporting screenings to the screenings treatment facility and feeding screenings from containers.[...]

[...]Increasing operational safety for pumping stations Pumps and lifting units are used where wastewater needs to be lifted to a higher level so it can be passed further on by gravity. However, the solids contained in the wastewater (coarse materials, foreign matter, fibers) often lead to a failure of the units used, as they cause operational downtimes due to clogging and blockages. Labor-intensive manual cleaning is required to restore the function of the units or, in the worst case, they even need to be replaced. To ensure trouble-free and reliable operation of a pumping or lift station, the installation of an upstream screening system is the best solution. HUBER has special screens and screening systems in its product range, which are especially suitable for pumping stations, shaft structures, or lift stations and which can be used both for sewage treatment plants and in the sewerage system. This increases the operational safety and availability of the pumping stations and significantly reduces material and personnel costs. For smaller applications, the HUBER Pumping Stations Screen ROTAMAT® RoK4 is particularly suitable, for larger applications, the HUBER Multi-Rake Bar Screen RakeMax ® , the HUBER Multi-Rake Bar Screen RakeMax® CF , and the HUBER Grab Screen TrashLift are the right choices.[...]

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[...]San Diego, USA Because inadequate filtering was allowing hair, fiber and sand contaminants to work their way through its treatment process, The City of San Diego Public Utilities Department Wastewater Branch (the Branch) sought out sludge cleaning technology that could integrate into its existing system. In an interview with Senior Plant Technology Supervisor, Ted Taylor, Huber Technology learned how its sludge screening technology helped Ted and his crews realize benefits that reached far beyond simply reducing contaminants. By putting six HUBER STRAINPRESS® Sludgecleaner SP units in place, the Branch realized benefits far beyond digester efficiencies. In addition to heightened performance, Ted and his crews have experienced: Reduced downtime. Reduced maintenance demands. Extended equipment life cycles. Fewer replacement parts. Higher quality sludge end-product. More efficiently burning methane gas. Challenge: The Branch noticed heating and mixing problems as well as a significant build-up of sand at the bottom of its six digesters that was resulting from the inadequate screening of raw sludge. They were regularly cleaning a 10 to 15 foot layer of hair, plastic and grease from the top of the digester contents. These issues contributed to inadequate mixing within the digesters. Faltering digester performance manifested in: Reduced gas production. Quality issues with end-product sludge. Frequent need for cleaning and repair. Accompanying the performance issues were maintenance issues that consumed significant technician man hours and increased the department’s replacement parts costs. A new screen system was tested using temporary piping outside of the digesters. The success of the test resulted in a $300 million to upgrade to the treatment plant that included the installation of integrated HUBER STRAINPRESS® Sludgecleaner SPs as feature of the plan. Solution: The Branch originally put five HUBER STRAINPRESS® Sludgecleaner units from Huber Technology in place in its Point Loma facility. The technology was so beneficial that the five existing units were upgraded and an additional unit purchased, bringing the Branch’s grand total of Strainpress Sludgecleaners to six. Huber Technology’s STRAINPRESS® systems screen sludge in-line without breaking line pressure. It is implemented within the existing structure to keep the process working very smoothly. No extra filtering is added at the end of the line and – because the screenings are filtered out along the way – the equipment down the entire line endures less stress and is less prone to breakage. Less matted hair & fiber = Improved process efficiencies With less contaminant making its way through the process, performance indicators immediately showed improvements. Less matted hair & fiber = Less maintenance & repair After the STRAINPRESS® implementations, the maintenance team was able to reduce the frequency with which it cleans its twelve heat exchangers from a monthly to a quarterly schedule. Additionally, fair fewer repairs are needed - resulting in decreased parts and manpower costs and less process downtime. For example, chopper pumps are used to recirculate sludge during the treatment process. Because almost all contaminants are extracted by the HUBER STRAINPRESS® Sludgecleaner SP before the sludge reaches the chopper pumps, their lifecycles have been extended. Less matter hair & fiber = Higher quality end-product The quantity and quality of the methane gas and the sludge end-products have improved. Methane gas produced in the digesters is used to internally to generate electricity. The Branch sells its surplus methane gas end-product – enough to supply 2000 homes per month – to the electric grid. The unwanted buildup of useless material in the digester tanks prohibits the maximum amount of gas to be produced. Sludge is pumped to the metro bio-solid facility and used in soil augmentation. Improving the quality of its sludge enables the Branch to keep its sludge end-product graded at the Class B level required for soil additive use. Senior P.T. Supervisor Ted Taylor Quotes “Strainpress technology helps us reduce the burden on our pumps, our heat exchangers and our maintenance crews. We’ve significantly reduced costs that go along with these factors – and we haven’t even included cost reductions in plant energy use and saved downtime.” “The removal of contaminants or screenings – such as hair, fiber and sand – from raw sludge was crucial to ensuring maximum efficiency within our digesters and throughout our treatment process.” “We noticed stark increases in the performance of treatment equipment – such as the digesters – and increased efficiency across our entire process.” “A reduction from 12 to 4 may not sound like much, but when you multiply the frequency by our dozen exchanges it is significant. 144 yearly cleanings are reduced to 48 – that is a tremendous 67% reduction in workload and costs.” “Making sure that we do the best possible job in removing contaminant screenings before they reach the anaerobic digestion phase helps us maximize our potential for generating end-product. Without the Strainpress® Sludgecleaner SP technology, we would not produce the quantity or the quality methane gas and soil additive that we produce from our bio-solids today.”[...]

[...]Safety climbing device, with design certification and CE marking, in accordance with DIN EN 14396, made of 1.4307 (AISI 304 L) stainless steel. When ladders are used as part of the work, and the potential for falls exists, OSHA may require the use of a personal fall arrest system (safety harness) to prevent injury. This is especially relevant for fixed ladders extending more than 24 feet, which must have a fall protection system such as a harness with a lanyard or self-retracting lifeline, as per 29 CFR 1910.28(b)(9) . The handle at the center is designed as a safety guard rail, equipped with bottom and top trip gear that can only be undone by hand. The climbing rungs are made of a U-profile with a perforated surface, 1.1 in. / 30 mm in diameter, offering slip resistance R 13 and lateral slipping limits. The step height is 11 in. / 280 mm, with wall fixing brackets included (maximum distance of 33 in. / 840 mm). The ladder also features a coupling for an insertable entrance aid. The entire structure is completely shielded, arc welded, acid-treated in a pickling bath, and passivated for enhanced durability. The following entrance aid with guard rail options are available : Insertable entrance aid, pivoted, type EH FSS D Insertable entrance aid, type EH FSS Insertable entrance aid, type EH FSS ‘Köln’ Options 1.4404 (AISI 316 L) stainless steel Fall arrestor type S5c with self-unfolding safety belt type HSE-BFD and spring safety hooks certified by “TÜV SÜD PRODUCT SERVICE GmbH“, CE 0123, suitable for safety guard rail Safety belt in accordance with EN 361, form A (breast-shoulder-crotch belt), suitable for safety guard rail Stainless steel fixing material: stud anchors Rest platform, foldable Entrance aid in accordance with DIN 19572 Access ladders must be equipped with a handhold at the exit. This requirement is considered fulfilled if one or both of the ladder handles extend at least 3.6 ft. / 1.1 meters above the exit height. This projection must be taken into account when selecting the ladder length! Refer also to our data / dimension sheet for the entrance aid.[...]

[...]Safety access ladder with guard rail, with design certification and CE marking, in accordance with DIN EN 14396, made of 1.4307 (AISI 304 L) stainless steel. Designed to accommodate an insertable entrance aid, this ladder complies with UVV regulations requiring ladders with heights of 9.8 ft. or 16.4 ft. / 3 m or 5 m to include fall protection devices. Manufactured in accordance with DIN EN 14396, the ladder is constructed from 1.4307 (AISI 304 L) stainless steel. The handles are made of a high-rigidity special profile (57 x 25 x 2.5 mm), covered with PVC caps for added comfort. The rungs are made of a U-profile with a perforated surface, 30 mm in height, and feature slip resistance R 13. The step height is 11 in. / 280 mm, with available clear ladder widths of 15.7 ft. or 19.6 ft. / 400 mm or 500 mm. Included with the ladder are 5.9 ft. / 150 mm long wall-fixing brackets for bolting (providing a distance from the wall to the middle of the rung), and a safety guard rail is fixed to the middle of the ladder. The entire ladder is completely shielded arc welded, acid-treated in a pickling bath, and passivated for durability and corrosion resistance. Options 1.4404 (AISI 316 L) stainless steel Fall arrestor type S5c with self-unfolding safety belt type HSE-BFD and spring safety hooks certified by “TÜV SÜD PRODUCT SERVICE GmbH“, CE 0123, suitable for safety guard rail Safety belt in accordance with EN 361, form A (breast-shoulder-crotch belt), suitable for safety guard rail Stainless steel mounting material: stud anchors Rest platform, foldable Entrance aid in accordance with DIN 19572 Access ladders required to have a handhold at their exit. This requirement is considered met if one or both handles of the ladder extend at least 3.6 ft. / 1.1 m beyond the exit height. This projection must be taken into account when selecting the ladder length! Refer also to our dimension sheet for the entrance aid. The following entrance aid with guard rail options are available (see following pages): Insertable entrance aid, pivoted, type EH FSS D, L = 4.1 ft. / 1260 mm Insertable entrance aid, type EH FSS, L = 4.1 ft. / 1260 mm Insertable entrance aid, type EH FSS ‘Köln’, L = 5.5 ft. / 1680 mm, with additional rung[...]