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[...]Mobile, AL, USA[...]

[...]Schnaittachtal, Germany The Schnaittachtal sewage treatment plant has been in operation for almost 50 years and currently employs six male and one female sewage treatment operators. For many years, the plant has relied on HUBER machines for mechanical wastewater treatment, such as the HUBER Screenings Wash Press WAP® Ro4-OS, HUBER Screw Conveyor Ro8 and HUBER STEP SCREEN. These have now been replaced by a new HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 size 1600 with a 3 mm bar spacing, a HUBER Screw Conveyor Ro8 T and HUBER Screenings Wash Press WAP® SL. A quarter of a century in service In service since 1999, the STEP SCREEN, which was well known at the time for its mechanical efficiency, was taken out of service in August 2024. After this long operating period of around a quarter of a century, the separation performance declined, partly due to age and partly due to changes in the wastewater inflow conditions, such as flushing loads and changes in screenings, so that the downstream processes could no longer run optimally. Increased efficiency thanks to modern screening technology The new screening system is a more efficient solution. It is also easier to maintain. Consequently, the STEP SCREEN offered a low financial return. Due to the load it was subjected to, the STEP SCREEN was estimated to have a service life of 15 to 20 years. The regional characteristics near Neunkirchen am Sand already provide an indication of what has also contributed significantly to the wear and tear of the screen. Significant relief for the entire plant The entire plant has been significantly relieved thanks to the new HUBER Rotary Drum Fine Screen ROTAMAT® Ro2, which has decreased the loads in the other areas of the wastewater treatment plant. This is because the new screen's high efficiency makes it much easier to retain and safely remove even the smallest residues from the wastewater stream. This is also reflected in the amount of screenings now being produced. It has doubled compared to the old STEP SCREEN. Structural challenges successfully overcome Initially, there were space-related challenges involved in replacing the system. This was due to the space required for the new screen, which is twice the size of the STEP SCREEN. Instead of 80 cm, 1.6 m was now required, as a wider channel was needed for the system. The conversion, including the removal of the main screen, the installation of the new channel and the reinstallation, was carried out quickly in just four weeks. Precise planning and project management are the keys to success The fact that this challenging conversion, involving the redesign of the entire inlet area and the replacement of the sewage lifting screws, could be completed within this time frame was also made possible by the perfect planning and project management by the commissioned engineering firm Miller from Nuremberg. We would like to thank everyone involved in the project, especially the employees of the Schnaittachtal sewage treatment plant, for the trust they placed in us and for the excellent cooperation.[...]

[...]Aeration/deaeration plant, max. throughput 3000 m³/h Natural aeration/deaeration plant with air connections on both sides to improve the hygiene in drinking water reservoirs. Constructed entirely from 1.4307 (AISI 304 L) stainless steel except the filter material. The components are shielded arc welded, acid-treated in a pickling bath and passivated for maximum durability and corrosion resistance. Security louvre , attack-proof, pre-finished, rigid design with a stable frame and slats. It includes a 1 x 1 mm insect screen that acts as the first filter stage, effectively preventing the ingress of small animals, insects, and organic coarse material. Air line is provided in partial lengths tailored to the specific local conditions. It includes a connecting plate designed to align with the louvre, allowing for airtight, bolted attachment to the interior structure wall. The setup is completed with a pipe connection piece for seamless integration. Air filter unit L661 features connection pieces on both sides, making it compatible with the air line. It includes a pre-filter and a suspended matter filter, equipped with two DN 15/2” stainless steel condensate drains positioned upstream and downstream of the filter package. Each drain is fitted with a ball valve for efficient operation. The unit also comes with wall-mounting brackets for secure installation. The air filter unit is specifically designed for direct installation within the air line. Serving as the second filtration stage, the pre-filter installed in the air line is filter class ISO ePM10 75% according to EN ISO 16890. Its primary function is to extend the service life of the third-stage suspended matter filter. The third-stage filter, rated as class H13, achieves a separation efficiency of at least 99.99% in accordance with DIN EN 1822 standards. Safety valve as an additional overpressure/underpressure protection to protect the structure in case of operating troubles. The response pressure is 0.14 psi / 1000 Pa. Options Optional equipment and spare parts Pre-filter of filter class ISO ePM10 75% in compliance with EN ISO 16890 Suspended material filter, filter class H13, separation efficiency 99.99% in compliance with DIN EN 1822, for type L661 Other Options 1.4404 (AISI 316 L) stainless steel Radial pipe ventilator for installation and for forced ventilation With power supply unit for regulating the pressure transducer from 230V to 24V[...]

[...]Aeration/deaeration plant, max. throughput 3170 gal/min (720 m³/h) Natural aeration/deaeration plant with air connections on both sides to improve the hygiene in drinking water reservoirs. Constructed entirely from 1.4307 (AISI 304 L) stainless steel, except the filter material. The components are shielded arc welded, acid-treated in a pickling bath and passivated for maximum durability and corrosion resistance. Louvre, attack-proof , pre-finished, rigid design, with a stable frame, slats and 1 x 1 mm insect screen. The air line is provided in partial lengths tailored to the specific local conditions, with a connecting plate designed to suit the louvre for air-tight bolted mounting to the interior structure wall, with pipe connection piece included. Air filter unit L361 with connection pieces on both sides, suitable for the air line, with fine filter and filter for suspended matter, with two DN 1/2“ stainless steel condensate drains upstream and downstream of the filter package, each with check valve, including wall mounting brackets. The air filter unit is specifically designed for direct integration into the air line. It incorporates a fine material filter installed in the air line filter class ISO ePM10 75% according to EN ISO 16890 and serves as second filtration stage. This filter extends the lifespan of the subsequent suspended material filter, which serves as the third stage. This suspended material filter, classified as H13, achieves a separation efficiency of at least 99.99 % in accordance with DIN EN 1822. Both filters consist of a germ-resistant material, ensuring drinking water hygiene is maintained even under conditions of high contamination and humidity. Safety valve as an additional overpressure/underpressure protection to protect the structure in case of malfunctions. The reaction pressure 0.14 psi / 1000 Pa. Options Optional equipment and spare parts Fine filter, filter class ISO ePM10 75%, in compliance with EN ISO 16890, for type 361. Suspended material filter, filter class H13, separation efficiency 99.99% in compliance with DIN EN 1822, for type 361. Other Options 1.4404 (AISI 316 L) stainless steel Radial pipe ventilator for installation in DN air line, for forced ventilation With power supply unit for regulating the pressure transducer from 230V to 24V.[...]

[...]Aeration/deaeration plant, max. throughput 1320 gal/min. / 300 m³/h Natural aeration/deaeration plant with air connections on both sides to improve the hygiene in drinking water reservoirs. Constructed entirely from 1.4307 (AISI 304 L) stainless steel except the filter material. The components are shielded arc welded, acid-treated in a pickling bath and passivated for the maximum durability and corrosion resistance. Louvre , designed to be attack-proof and pre-finished, rigid design with a stable frame and slats. It includes a 1 x 1 mm insect screen that acts as first filter stage, effectively preventing the ingress of small animals, insects and organic coarse material. Air line in partial lengths according to the specific local conditions, with a connecting plate designed to suit the louvre (item 1.0) for air-tight bolted mounting to the interior structure wall, with pipe connection piece. Cylindrical air filter unit L252 , with connection pieces on both sides, suitable for the air line, with filter for suspended matter H13, with central 1/2“ condensate drain and ball valve for connection to the customer’s drain pipe. The cylindrical air filter unit is designed for installation directly into the air line. The air filter unit houses a filter for suspended matter that achieves a separation degree of up to 99.99% in accordance with DIN EN 1822 for optimal supply air purification. Safety valve type 170-1 as an additional overpressure/underpressure protection for the structure in case of malfunctions. The reaction pressure is 0.14 psi / 1000 Pa. Options General Options 1.4404 (AISI 316 L) stainless steel Radial pipe ventilator for installation in DN air line, for forced ventilation With power supply unit for regulating the pressure transducer from 230V to 24V. Optional equipment and spare parts Suspended material filter, filter class H13, separation efficiency 99.99% in compliance with DIN EN 1822, for type L252[...]

[...]Aeration/deaeration plant, max. throughput 264 gal/h (250 m³/h) Natural aeration/deaeration plant with air connections on both sides to improve the hygiene in drinking water reservoirs. The system is entirely constructed from 1.4307 (AISI 304 L) stainless steel with the exception of the filter material, shielded arc welded, acid-treated in a pickling bath and passivated for enhanced durability. Ready-to-operate installation, without additional brickwork, plastering, chiselling and electrical work, without drain pipe. The louvre is attack-proof, pre-finished, rigid design, with a stable frame, slats and 1 x 1 mm insect screen. The insect screen serves as first filter stage and prevents the ingress of small animals, insects and organic coarse material. Minimum size of the louvre is 19.6 x 11.8 in. / 500 x 300 mm. The air line is provided in partial lengths tailored to the specific local conditions, featuring a connecting plate designed to suit the louvre (item 1.0) for air-tight bolted mounting to the interior structure wall. It includes a pipe connection piece and is made of longitudinally welded seam stainless steel pipes. The system also incorporates bends as required, flexible joints, fixing material, foam rubber gaskets, and mounting brackets. Cylindrical air filter unit L251, with connection pieces on both sides, suitable for the air line, with filter for suspended matter H13, with central 1/2“ condensate drain and ball valve for connection to the customer’s drain pipe. The air filter unit is designed for installation directly into the air line. The air filter unit houses a filter for suspended matter that achieves a separation degree of up to 99.99% in accordance with DIN EN 1822 for optimal supply air purification. The inspection opening in the casing ensures easy filter replacement. A pressure transducer controls filter pollution. Safety valve type 170-1 as an additional overpressure/underpressure protection for the structure in case of malfunctions. The reaction pressure is 0.14 psi / 1000 Pa. Options General Options 1.4404 (AISI 316 L) stainless steel Radial pipe ventilator for installation in DN variable air line, for forced ventilation With power supply unit for regulating the pressure transducer from 230V to 24V Optional equipment and spare parts Suspended material filter , filter class H13, separation efficiency 99.99% in compliance with DIN EN 1822, for type L251.[...]

[...]Micro Screens and Filter Advanced wastewater treatment for removal of suspended solids to improve clarifier effluent quality Products for Micro Screening and Filtration Disc Filter Pile Cloth Media Filter Sandfilter Active Carbon Filter Reliable and innovative solutions for advanced wastewater treatment HUBER offers reliable and innovative solutions for advanced wastewater treatment by means of filtration, active carbon filtration, micro-screening and pile cloth media filtration. This leads to a significant effluent quality improvement in addition to the following treatment stages - for biologically treated wastewater and for raw wastewater. Filtration of biologically treated wastewater serves for removal of suspended solids (suspensa) remaining in clarifier effluents. Such suspensa contain about 50 % carbon, almost 10 % nitrogen and over 1 % phosphorus. Around 1 mg/L (ppm) of phosphorus remain in the effluent, even if the biological treatment stage is designed for enhanced biological phosphorus removal and/or chemical phosphorus precipitation. Subsequent filtration is necessary where stringent phosphorus limits must be reliably maintained. Micro-screening is also possible for the treatment of raw wastewater which is discharged into the watercourse. Thereby almost all solids and, if required, also phosphates are removed.[...]

[...]Elimination and reduction of micropollutants with the PAC process Trace substances can be removed from wastewater with the help of powdered activated carbon (PAC), as the micropollutants adsorb to the activated carbon. Powdered activated carbon is ground activated carbon. According to DIN 12903, at least 95 percent of the mass fraction must have a grain size of less than 150 micron. The average particle diameter of typical powdered activated carbons is approximately in the range of 10 micron to 50 micron. For the elimination of micropollutants, the powdered activated carbon is added directly to the wastewater to be treated. The activated carbon can be added at different points in the wastewater treatment process (simultaneous process). In the "Ulm process", a separate adsorption tank is used after the biological stage. There, fresh activated carbon is added to the treated wastewater. PAC Powdered Activated Carbon In principle, it is important that the process ensures sufficient contact time so that the trace substances can adsorb to the powdered activated carbon. The powdered activated carbon must then be separated from the treated wastewater. This is usually done after precipitant addition in a sedimentation tank, where some of the separated carbon is discharged as excess carbon together with the excess sludge and some is returned to the contact tank as return carbon. Due to the recirculation, the activated carbon remains in the wastewater treatment process for several days. It is very important that the treated wastewater is free of activated carbon before it is discharged into the receiving water. The powdered activated carbon (PAC) should be separated as completely as possible from the treated wastewater. For this reason, a downstream filtration stage (polishing filter) is necessary that is able to retain any remaining fine carbon particles. The HUBER Pile Cloth Media Filter RotaFilt ® is an ideal product solution for this purpose. The polishing pile cloth filter reliably retains even the finest carbon slip that could not be separated in the sedimentation tank. As an alternative to the pile cloth media filter, the HUBER Sandfilter CONTIFLOW® can be used as a proven and reliable polishing stage to retain the ultrafine activated carbon particles.[...]

[...]Adsorption with granulated activated carbon (GAC, German GAK) is a simple, reliable and, above all, low-maintenance process. This makes it ideal as a fourth treatment stage, especially for smaller wastewater treatment plants. The core component of the process is the HUBER Active Carbon Filter CONTIFLOW® GAC , which is filled with granulated activated carbon and acts as an adsorber for the micropollutants. The particle size of granulated activated carbon (GAC) is usually between 0.5 mm to 4 mm. GAC Granulated Activated Carbon The HUBER Active Carbon Filter CONTIFLOW® GAC is installed downstream of the biological treatment stage. The wastewater flows through the carbon bed and the trace substances are adsorbed onto the activated carbon. An additional separation stage downstream of the HUBER Active Carbon Filter CONTIFLOW® GAC is not required. After reaching the adsorption capacity, the loaded activated carbon is replaced by fresh carbon. The loaded activated carbon can be reactivated and then used again for adsorption. One way of optimizing the process, depending on the requirements and boundary conditions, is to use ozone. In this case, an ozonation stage is provided upstream of the adsorption stage. Ozone (O3) is a strong oxidizing agent and is therefore able to oxidize at least some of the organic trace substances that are difficult to degrade. This significantly increases the broadband effect and also extends the service life of the activated carbon. In practice, the use of a filter stage before the elimination of trace substances has proven successful. This allows dirt and impurities to be reliably separated and thus do not reach the activated carbon bed or the ozone system. In addition to being easier to maintain, the filtration stage can also be used as a flocculation filter for phosphorus elimination at the same time, resulting in a valuable synergy effect. For this application, both the HUBER Rotafilt® cloth filter and the HUBER CONTIFLOW® sand filter are ideal key components.[...]

[...]Adjustable louvre TT10.B for internal face of the wall, ready for installation, 1.4307 (AISI 304 L) stainless steel. Frame , made from angle section with boreholes for bolted fixing. Slats , adjustable, overlapping when closed, with chain pull lockable in any position. Both frame and slats are shielded arc-welded and acid bath cleaned before washing, drying and surface passivation. Options: 1.4404 (AISI 316 L) stainless steel Fixing material[...]