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[...]Heiligenblut, Austria The Heiligenblut wastewater treatment plant, which has a capacity of 8,250 PE, was built at the foot of the Großglockner, Austria's highest mountain, in 1986. It treats the wastewater of the entire municipality of Heiligenblut (at an altitude of 1,288 m), including Kaiser-Franz-Josefs-Höhe, which is the highest point of the Grossglockner High Alpine Road (at an altitude of 2,369 m). The sewage treatment plant is located next to the Mölltal federal road in the village of Rojach, at an altitude of 1,098 metres. The challenge: limited installation space and high requirements The special challenge was to install a machine with good separation performance and high hydraulic throughput for a wastewater volume of 60 l/s, given the circumstances, such as installing a screw conveyor in the direction of flow upstream of the screen, a short screen chamber and a deep channel, as well as ensuring a short conversion time. Proven solution: vertical HUBER Pumping Stations Screen ROTAMAT® RoK4 This is not the first time that a special solution with a vertical HUBER Pumping Stations Screen ROTAMAT® RoK4 was provided. The same solution was used 16 years ago in Reischach in Lower Bavaria. When installed as a free-standing inlet screen in a pumping station, the RoK4 normally has a free outlet for the screened wastewater all around. Creative use of existing structures in the channel In the channel, only the downstream half of the screen basket would be hydraulically effective if the two U-beams of the frame of the old back-raked screen were not walled in exactly where they are. There, these beams serve a dual purpose: vertical grooves did not need to be cut into the channel wall on both sides and the lateral U-beams allow flow around them, thus enabling hydraulic utilisation of the inlet side of the screen basket. This side is hydraulically separated from the inflow by a baffle and inlet plate. Adapted performance through half-side flow With a completely free outlet, as in a pumping station, the RoK4 size 500 with 6 mm perforation can screen 120 l/s of domestic wastewater. Given that only half of the screen basket can be used for flow, the dimensioning of the screen was well suited to a 60 l/s inflow volume. Efficient adaptation for maximum effect The challenge was to adapt a machine designed for a different purpose so that it works in harmony with the structural conditions, providing performance reserves and significant benefits to the customer with minimal conversion measures. If you also have challenging issues, please contact us. More information on the HUBER Pumping Stations Screen ROTAMAT® RoK4 at www.huber-se.com/de-de/produkte/detail/huber-schachtsiebanlage-rotamat-rok4/[...]

[...]Germany Membrane systems, especially membrane bioreactors (MBR), are wastewater treatment technologies that combine biological processes with membrane filtration. These systems are used in some sewage treatment plants instead of the conventional activated sludge process. A typical MBR system consists of a biological reactor in which microorganisms break down organic matter and a membrane filtration unit that separates the purified water from the solids. Solids separation prior to membrane filtration To ensure optimum performance, membranes must be protected from large solids. For this purpose, two-dimensional separation of solids with a screen with between 1 and 2 mm bar spacing is considered optimal. HUBER offers various systems in this range, each with its own advantages. System types and applications Both the HUBER Drum Screen LIQUID with perforated plate or as STAR version and the HUBER Rotary Drum Fine Screen ROTAMAT® RPPS or STAR are used. The two machine types are used for different requirements. For lower throughputs and small applications, a small size of the ROTAMAT® RPPS is sufficient. For large wastewater treatment plants, the Drum Screen LIQUID with its small footprint is the ideal choice. Treatment of screenings and flexible system solutions When it comes to treating the separated screenings, the well-known system with integrated screenings washing and compaction can be used with the ROTAMAT® machine solution. The flume that conveys the screenings from the Drum Screen LIQUID is very flexible and several machines can be interconnected so that the screenings can be treated collectively, e.g. with a HUBER Micro Strainer ROTAMAT® in tank. HUBER solutions in international projects Due to the different requirements of each plant, we recently commissioned a Drum Screen for use in two projects in Australia, for example. Two projects in Greece are also equipped with this solution. On the other side of the globe, several projects in America are running with ROTAMAT® STAR machines, which reliably protect the downstream membranes from contamination and thus ensure optimised operation. Flexible solutions for individual requirements HUBER offers the optimal solution for any situation where the wastewater needs to be screened before it goes through a membrane system.[...]

[...]Wendelstein, Germany Since 2008, the ZV zur Abwasserbeseitigung im unteren Schwarzachtal (Lower Schwarzach Valley Sewage Treatment Association) has been retrofitting existing relief structures with screening systems to separate floating and coarse materials. These retrofits contribute significantly to greatly improving the discharge quality of rainwater from the combined sewer system into the receiving water. Installation of a screening plant at the Röthenbacher Straße stormwater tank with overflow In the stormwater tank with overflow at Röthenbacher Straße in Wendelstein, just outside Nuremberg, a screening plant had to be installed in front of an existing overflow sill. The system had to be dimensioned so that the entire discharge volume of 2,234 l/s could be reliably treated with a required screen aperture of 6 mm. The very limited permissible backwater levels during system operation also had to be taken into account for dimensioning. HUBER Storm Screen ROTAMAT ® RoK2 meets all requirements The HUBER Storm Screen ROTAMAT® RoK2, size 700, was able to meet all these requirements without restriction. Decision in favour of proven technology Based on the positive operational, maintenance and separation performance experiences gained from the previous four screen installations, the decision was made to purchase another HUBER Storm Screen ROTAMAT® RoK2. HUBER SE would like to thank the client, the Lower Schwarzach Valley Sewage Treatment Association, the head of the wastewater treatment plant, Mr Heiling, and the engineering firm Christofori und Partner from Heilsbronn, which was responsible for planning, tendering and construction supervision, for their trust and excellent, constructive and smooth cooperation.[...]

[...]Shanghai, China A total of twelve HUBER Fine Screens ROTAMAT® Ro1/2600 were supplied for the second construction phase of WWTP Zhuyu There is hardly another city worldwide that is growing with such a breath-taking speed as Shanghai, China’s boom town. But such rapid growth comes at a high price. Shanghai’s infrastructure can hardly cope. It happens time and again that the power stations can not supply enough electricity, or that even the 12 lane main highway is jammed to a stand-still. Of course, sewers and treatment plants are also under strain and the city administration is doing its best to keep up. Seven years ago we supplied a pair of ROTAMAT® Fine Screen units Ro1 with a screen basket diameter of 2.6 m for the Bai Long Gang wastewater treatment plant, serving a high-tech industrial park in the city district Pudong. Our screens proved their excellent performance and reliability, which is particularly important for mechanical wastewater pre-treatment. Because of this excellent reference installation, Ro1 fine screens were also selected for the first construction phase of the plant Zhuyuan in 2003 and four Ro1 screens with a screen basket diameter of 2.2 m were ordered and installed. Only three years later the second construction phase began. This time we received an order for twelve ROTAMAT® Ro1 fine screens, again with a 2.6 m diameter, the same size as supplied seven years earlier. They can handle a 500,000 m³/d wastewater flow. However, this time we supplied twelve ROTAMAT® Ro1 screens of an improved version that maintains all its excellent features, but is less expensive to manufacture. The screens were installed in twelve parallel channels over a width of 42 m. They are lined up like pearls on a string.[...]

[...]Detmold, Germany The Detmold wastewater treatment plant has replaced its old step screen with a modern HUBER Multi-Rake Bar Screen RakeMax® J. The decision was made in favour of HUBER SE, who realised the entire project from start to finish – from preparing the drawings to installing and successfully commissioning the new screen system. The new HUBER RakeMax® J impresses with its high efficiency and reliability in coarse and fine screening of wastewater. Thanks to its robust design and innovative technology, it contributes significantly to improving screening efficiency and ensures the wastewater treatment plant operates optimally. Customer satisfaction across the board Those responsible for the Detmold sewage treatment plant are extremely satisfied with how the project was handled. The seamless integration of the new screen into the existing plant and the competent support provided by HUBER SE were particularly highlighted. By investing in the new multi-rake bar screen, the Detmold sewage treatment plant is ensuring that it will continue to provide efficient and sustainable wastewater treatment in the future. Additional HUBER machines for efficient sewage sludge treatment In addition to the new screen, two HUBER Screw Press Q-PRESS® 440.2 units are also in use at the Detmold sewage treatment plant. Successful dewatering tests were carried out prior to installation, which contributed significantly to the optimal planning of the plant. These modern screw presses now ensure efficient sewage sludge dewatering and support economical and sustainable operation. Another innovative element of the plant is the new type of injection and mixing unit, which is pneumatically controlled. This ensures optimised distribution of additives, improves the sludge dewatering process and increases operational reliability and discharge DR. ‘Professional, top quality, everything from a single source’ Operations Manager Tassilo Vollmer says: ‘The collaboration with HUBER SE was professional and smooth from the very beginning. From planning to commissioning, we received everything from a single source – efficiently, on time and in top quality.’[...]

[...]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.[...]

[...]Grand Rapids, MI USA An alternative for ageing scraper bridges. They work constantly, know no weekends and are exposed to wind and rain. They are familiar with wear and corrosion and are grateful for a few drops of lubricating oil. We are talking about the scraper bridges of grit channels. When the ravages of time take their toll At some point, after what feels like two sewage works operator’s lifetimes, the time comes when this ‘vehicle’ is no longer fit for purpose. The concrete of the grit channel could certainly withstand the same amount of time again, but the machinery has had its day. Complicated replacement Now good advice is hard to come by, because replacing an old bridge scraper is difficult due to availability and price. In addition, these systems, whether blade or suction scrapers, have the negative habit of causing problems with the submerged ‘transfer’ device (blade/pump). Excessive running times are the consequence if you want to avoid clogged pumps. Efficient solution: HUBER Grit Trap GritWolf® A good solution in case X is the underwater scraper of the HUBER GritWolf® The scraping unit consists of a horizontal screw conveyor that transports the grit separated in the grit channel towards the grit pump. Due to the low speed, the grit is evenly dosed into the inlet area of the pump, which in turn benefits from low wear and reliable operation. If flushing surges cause large amounts of grit to accumulate in the grit channel for a short period of time, the screw reliably works through the pile without increasing the running time. More power with lamella packs Ageing grit chambers with insufficient grit separation due to increased wastewater volumes can be retrofitted with additional lamella packs from the HUBER GritWolf®. The lamellae provide more settling surface for the grit, so that even ‘undersized’ grit channels can achieve satisfactory grit separation. Energy savings The use of lamellae eliminates the need for grit channel aeration, thereby removing a major energy guzzler and contributing to the energy self-sufficiency of a sewage treatment plant. Air, the greatest enemy of fine grit separation, is successfully shown the ‘red card’. The grit trap material becomes finer-grained and the proportion of organic matter also increases. A well-functioning grit washing plant is the right answer to this mixture of solids. Targeted removal of floating matter When the air is turned off, floating and grease-like matter collects on the surface of the grit chamber and is transported to the end of the chamber by the flow. There, it can be retained by a baffle plate and removed in a targeted manner by the grease removal paddle of the HUBER GritWolf® and sent for recycling. Sustainable grit chamber technology In summary, the use of GritWolf® components simplifies grit removal, improves grit separation and ensures the safe removal of floating matter. As there is no more scraper bridge or ventilation, the entire grit chamber can be covered, putting an end to annoying odour emissions.[...]

[...]Plants for sludge treatment (e.g. HUBER Screw Press Q-PRESS ® , HUBER Disc Thickener S-Disc) or for pre- and secondary treatment of industrial and municipal wastewater (e.g. HUBER Flotation Plant HDF) are usually purchased in Germany. This involves prior planning, authorisation, construction of infrastructure and buildings, as well as permanent responsibility for the acquired plant technology. In addition, the process from idea to implementation often takes several years. Industrial plant operators, in particular, increasingly wish and demand to rent rather than permanently purchase machinery and equipment. The reasons are: Short-term and rapid implementation, especially where the wastewater pollution load is temporarily or permanently higher due to increased production Tight deadlines set by the authorities to improve discharge values (including in the event of a threatened plant closure), also as a stopgap until a permanent installation is built Avoiding complex planning and preparation processes, as well as reduced investment in structures and buildings Avoiding major investments, especially in economically strained times, and utilisation of operating cost budgets … HUBER has recognised these requirements and will make machines and systems available for rent in the future. The technology can be rented temporarily and then returned, or taken over completely at a later date. In most cases, the machines are designed completely ready for connection and operation as containerised systems, as so-called skids or as individual machines that can be temporarily installed on site, e.g. in tents. A whole range of HUBER machines is available for a wide variety of applications: Sludge thickening and dewatering (disc thickeners, screw presses) Flotation plants up to approx. 50 m³/h, including chemical pre-treatment Screening systems in tanks (different separation capacities) Contact us, we will be happy to advise you and offer you the right solution for your wastewater and sludge issues.[...]

[...]China A strong addition to the HUBER portfolio The GritWolf®, the cross-flow lamella separator, completed the HUBER grit trap portfolio a few years ago. HUBER is the competent partner worldwide for grit removal in every application, whether municipal or industrial, in existing or new constructions, or with longitudinal, round or tangentially accelerated systems. A successful model with a unique selling point The HUBER GritWolf®, launched on the market a few years ago, is enjoying brisk demand. Its unique selling point as a lamella separator, coupled with reliable grit removal by means of a screw conveyor over the entire length of the grit chamber, is unbeatable. Due to its easy-to-clean lamella packs, the GritWolf® is also becoming increasingly popular in the industrial sector. Silt-laden wash water can be effectively treated and reused sustainably. Retrofit successes and versatile areas of application In recent years, many municipal contracts have been generated with the GritWolf®. The upgrading or retrofitting of existing old plants in particular exceeded the targets set. It is not the size of the sewage treatment plants that is decisive, but the need to offer customers a satisfactory, sustainable solution that does not require a large amount of space. That is why numerous references can now be found in the capacity range from 50 to 10,000 l/s (several machines for this volume, of course). In short: compact, efficient, sustainable With its sophisticated technology and flexible application, the HUBER GritWolf® remains a strong partner for modern grit separation. Because there is much to be done around the globe – today and tomorrow.[...]

[...]The combined sewer tunnel in Lisbon is a state-of-the-art infrastructure project that protects the city from flooding caused by heavy rainfall and drains urban wastewater during dry weather periods. In the past, extreme rainfall of up to 60 mm per hour repeatedly caused considerable damage in lower-lying districts of the city. The Túnel Monsanto-Santa Apolónia, the so-called ‘mega tunnel’, is the city administration's largest construction project to date and a central component of the urban climate adaptation strategy. With a length of exactly 4,975 metres and an internal diameter of 5.5 metres, the tunnel was designed to handle water volumes of up to 40 cubic metres per second. This corresponds to around 2.4 million litres per minute or the capacity of 16 Olympic swimming pools within 60 seconds. Efficient water drainage through hydraulic optimisation The system begins in the higher-lying areas of the city, where specially developed inlet structures with a hydraulic capacity of 200 cubic metres per minute collect surface water. A branched network of collection pipes transports the water together with local wastewater to the main tunnel with minimal energy loss. The flow velocity reaches up to 5.2 metres per second, ensuring efficient drainage without backwater and sedimentation. The final outlets are strategically located in the immediate vicinity of the River Tagus and have been designed so as not to interfere with the natural currents of the river. A special energy dissipation system reduces the flow velocity of the discharged water to prevent erosion of the banks. Engineering challenges and construction method The tunnel's construction incorporates state-of-the-art engineering techniques to ensure stability, durability and minimal impact on the surrounding urban structure. During the construction phase, complex geological challenges were overcome, including the crossing of a wide variety of rock layers and minimising the impact on existing buildings and transport routes. Prefabricated reinforced concrete segments were used to stabilise the tunnel wall. Reliable and efficient machine technology from HUBER for combined sewer water screening A central component of the tunnel system is a multi-stage combined sewer water screening system, which prevents coarse contaminants from entering the River Tagus by returning the retained screenings to the local sewer system. The system essentially consists of the following HUBER machines: 12x HUBER Storm Screen ROTAMAT® RoK1 6x HUBER Screw Conveyor Ro8 T 1 HUBER Launder Channel HLC The complete solution from HUBER will ensure efficient retention and removal of particles larger than 6 mm in the future. Two-dimensional screening by the HUBER RoK1 reliably removes organic and inorganic solids such as leaves, plastic waste and sediments before the water is discharged into the river. The downstream screw conveyors then transport the concentrated screenings from the RoK1 to the launder channel, which is used to discharge the screenings from the system. This measure significantly improves water quality and protects the ecological balance in the Tagus. Sustainability and long-term impact Depending on rainfall intensity, the planned annual volume of water that can be diverted through the tunnel is up to 25 million cubic metres. This enormous capacity will significantly reduce the risk of flooding in Lisbon, particularly in districts such as Baixa and Alfama, which have been badly affected in the past. Modern engineering technology and sustainable urban planning This major technological project not only represents a milestone for the city, it also sets new standards in urban flood prevention. With increasing weather extremes as a result of climate change, the rainwater tunnel shows how modern engineering technology and sustainable urban planning can be successfully combined.[...]