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[...]Bremen, Germany A new future quarter for business, living, work, culture and leisure is currently being built in Bremen – with a sustainable energy supply from wastewater: Europe's once largest tobacco factory is being revitalised into the “Tobacco Quarter” building complex. The quarter has reinvented itself, turning an outdated industrial site into a prime example of urban development with its finger on the pulse of the times. It is one of the largest urban development areas in northern Germany. A new future quarter for business, living, work, culture and leisure is currently being built in Bremen – with a sustainable energy supply from wastewater: Europe's once largest tobacco factory is being revitalised into the “Tobacco Quarter” building complex. The quarter has reinvented itself, turning an outdated industrial site into a prime example of urban development with its finger on the pulse of the times. It is one of the largest urban development areas in northern Germany. The new Tobacco Quarter will utilise energy from wastewater for heating and cooling with the help of the HUBER ThermWin system. On average, 1 MW of thermal energy will be used for heating and around 0.4 MW for cooling building sections of the new urban quarter. The sustainable overall concept of the Tobacco Quarter was awarded the DGNB Gold pre-certificate by the German Sustainable Building Council (DGNB) in 2023. Technical solution together with swb and hanseWasser At an initial meeting in 2021, an inspection of an existing pumping station took place in order to assess the extraction situation. This took place with the parties involved in the project, hanseWasser Bremen GmbH and swb Services AG & Co. KG. Based on the wastewater volumes and temperatures, numerous potential analyses were carried out as part of a feasibility study. hanseWasser Bremen GmbH was able to provide extensive measurement data and it soon became clear that wastewater as a resource could make a major contribution to a sustainable energy supply for the new urban quarter. Experience utilised from existing HUBER system in Bremen swb Services AG & Co. KG, the sales company for technical services of Stadtwerke Bremen, the Bremen municipal utilities, contacted HUBER SE: One of the reasons for this was that HUBER had already supplied a plant for energy recovery from wastewater to hanseWasser Bremen GmbH about ten years ago. A HUBER Heat Exchanger RoWin size 4 reliably operates at the pumping station in Bremen. ”Exclusively positive feedback“ According to Frank Estler, Project Manager at swb Services, the reasons in favour of the HUBER ThermWin system were obvious: ”When looking for a suitable heat transfer system, two points were particularly important to us. The system had to have proven its efficiency in practice and the maintenance effort on the wastewater side had to be minimised. We received exclusively positive feedback from hanseWasser from the project in Findorff on both points and on the cooperation with HUBER.“ The HUBER ThermWin system The HUBER ThermWin system enables the heating and cooling of buildings by utilising the wastewater in the sewerage system as a regenerative energy source. The temperature of wastewater in the sewerage system is usually between 12 and 20 °C and hardly drops below 10 °C even in winter, which is why wastewater is an ideal energy source for operating a heat pump. All larger buildings and local heating networks are suitable consumers of the heating energy obtained in this way. Part of the wastewater flowing through the sewer is first passed through a HUBER water pre-screening solution (e.g. usually a screen such as the HUBER Pumping Stations Screen ROTAMAT® RoK4), which removes the coarse material from the wastewater. In the Bremen Tobacco Quarter project, the raw wastewater is pre-screened by a HUBER Rotary Drum Fine Screen ROTAMAT® RPPS 1400. The wastewater is then distributed into three HUBER Heat Exchangers RoWin, which are installed above ground and specially developed for wastewater, and then flows back into the sewer. Inside the heat exchanger, the heat is exchanged with the secondary circuit, which is coupled with the heat pump. Federal funding for efficient heating networks The HUBER ThermWin process utilises wastewater as a long-term secured and constantly renewing energy source to enable an environmentally friendly and sustainable process for heating and cooling buildings. Fossil fuels such as gas, oil or coal can be saved and CO 2 emissions minimised. In future, the Tobacco Quarter will save around 245 tonnes of CO 2 per year. This is why this project is subsidised by the Federal Ministry of Economics and Climate Protection (BMWK) under the Federal Funding Scheme for Efficient Heating Networks (BEW). With this funding measure, the BMWK supports the construction of new heating networks with a high proportion of renewable energies as well as the decarbonisation of existing networks. 1 MW for heating, 0.4 MW for cooling the Tobacco Quarter The plant for energy recovery from wastewater is expected to supply energy to the city quarter in October 2024. Three HUBER Heat Exchanger RoWin units will then utilise an average of 1 MW of thermal energy for heating and around 0.4 MW for cooling sections of the building. Another important contribution to sustainable and environmentally friendly building and urban planning with exemplary character – and a lighthouse project for HUBER.[...]

[...]Munich, Germany As part of Munich's Education Construction Initiative, Germany's largest municipal education construction programme, it was decided in 2020 to build a new daycare centre with three nursery groups in the Freimann/Kleinlappen district. The chosen location was an undeveloped plot of land on Josef-Wirth-Weg. A special feature of the building site is a sewer that runs slightly elevated in a dam to the north of the property. This sewer is not just a simple collection channel, but one of the main inflows to Munich's Gut Großlappen sewage treatment plant. Sustainability was a guiding principle in planning and construction From the outset, sustainability was a key consideration in the planning of the daycare centre. The centre was designed as a passive house using timber construction. The building was also designed to be 100% renewable. The engineering firm Eder was commissioned to develop and plan an energy concept that met the client's sustainability requirements. Focus on alternative energy sources However, as the location was outside the urban district heating network, alternative energy generation options had to be explored. As well as near-surface geothermal energy, the possibility of utilising the heat from the sewage in the channel flowing directly past was considered. HUBER as a partner for innovative energy use At the end of 2021, HUBER received a request from the engineering firm for a feasibility study of the HUBER ThermWin system for this project. Initial energy designs by HUBER showed that the conditions for wastewater heat recovery were excellent. An on-site meeting with HUBER, the engineering firm and Munich's municipal drainage authorities also showed that the location of the sewer and its height in relation to the construction site were favourable for such an application. The city of Munich now pushed ahead with plans to heat the daycare centre with a wastewater heat recovery system, and the engineering firm Eder was awarded the planning contract. Unique installation arrangement of the HUBER machines Throughout the planning phase, HUBER was always available to answer questions and provided plans for the shaft and plant technology free of charge via its in-house plant planning department. In collaboration with the building authority, the architect and the engineering firm, a plan was developed to implement the ThermWin system into the open-group concept of the daycare centre. This resulted in a unique arrangement for installing the plant system. It was planned that the HUBER RoWin wastewater heat exchanger and heat pump would be installed on the first floor, while the shaft for the pumping station screen would be located in an annex beneath the pram parking area. Delivery and commissioning In mid-2023, a tender was issued for the heating system, which also included the HUBER Pumping Stations Screen ROTAMAT® RoK4 300 and the RoWin 4 wastewater heat exchanger. The contract was awarded to a Munich-based heating system manufacturer, which placed its order with HUBER at the end of 2023. In autumn 2024, the HUBER system was delivered to the construction site and installed by the service team.. The heating plant was commissioned in December.[...]

[...]Central Hesse, Germany Mittelhessen University of Technology (THM) university of applied science intends to exploit a previously quite unknown potential with a new system: heating and cooling with energy from wastewater. The new plant, with the HUBER ThermWin system at its core, was commissioned at the end of May by THM's executive committee, Giessen's Mayor Frank Tilo Becher and Ayse Asar, State Secretary at the Hessian Ministry of Science and Art (HMWK). THM President Prof. Dr Willems: “previously untapped wealth” The plant is located at THM's Wiesenstraße campus. With canteens, numerous lecture halls, central administrative facilities as well as laboratories and workshops in several specialist areas, the campus is always a bustling hive of activity. The amount of wastewater generated is correspondingly high. In addition, the university primarily uses the wastewater from public sewers. “It may sound strange, but this wastewater represents previously untapped wealth,” THM President Prof. Dr Matthias Willems said during commissioning. Wastewater has average temperatures of 10 to 12 degrees Celsius in winter and just under 20 degrees in summer. Using heat exchangers and heat pumps, this “wealth” can be used for cooling and heating. Saving 300 tonnes of CO 2 per year with HUBER ThermWin At THM, the wastewater will in future be collected from the sewers of the Central Hessian water utility company using a HUBER ROTAMAT ® RoK4 pumping stations screen. From there, the liquid medium is pumped into the HUBER RoWin heat exchanger installed in the building, while the solids are directly returned to the sewer. The heat exchanger operates a heat pump in winter and a chiller in summer. The heat pump can provide around 850 kW of heat output, while the chiller generates around 600 kW of cooling energy. The aim is to save around 300 tonnes of CO 2 per year. Hessen’s State Secretary Asar: “system saves CO 2 and advances research into sustainability” “Hessen plans to be climate-neutral by 2045, the state government wants to lead by example and be CO 2 neutral by 2030 – universities will make an important contribution to this as a result of their share of energy consumption in the state properties,” Ayse Asar explained. "And, it goes without saying that our universities are also training the bright minds of tomorrow who are developing solutions for a climate-friendly energy supply. The wastewater heat recovery plant not only saves CO 2 , it also represents a big step forward in sustainability research." Around EUR 1 million in funding HMWK is supporting the construction and operation of the plant with around one million euros from the “REACT-EU” fund, which was set up in response to the Covid pandemic to promote projects in the European Regional Development Fund (ERDF), especially at educational institutions. However, the idea of using the heat from wastewater was already floating around at THM before the pandemic, as Prof. Dirk Metzger, Vice President of Strategic Construction Planning and Sustainability, explained. The project was implemented in 2022, when THM’s facility management developed an energy concept and, following a tour of the HUBER pilot plant at the Museum of Bavarian History in Regensburg, started with the concrete planning. The structural key elements of the plant for the use of energy in wastewater were delivered last December before commissioning was completed in May of this year. Federal Minister Geywitz found out more on site At the end of August, Klara Geywitz, Federal Minister for Housing, Urban Development and Building, gained first-hand information on site about the potential of municipal wastewater for heating and cooling: “it is becoming increasingly more important that we have as many decentralised solutions as possible in terms of energy and heat supply,” Geywitz said. During a guided tour of the technical facilities, she was impressed by the engineering performance and its compact implementation, which also enables its use in existing buildings or new residential housing districts. “What you are doing here is basically municipal heat planning – just on a campus,” emphasised Federal Minister Geywitz. The fact that the university relies on wastewater as an energy source that is available anywhere is innovative: “you are using something that is actually seen as a problem, without generating additional costs or an environmental impact.” The fact that the technology is also available for teaching and research purposes in the sense of an actual laboratory completes the idea of sustainability.[...]

[...]Berching, Germany Sewage sludge disposal is a key issue on sewage treatment works. Irrespective of the way of sludge utilization, sludge weight and volume are the main causes for high costs. State-of-the-art technology offers several dewatering options but most of these solutions disregard the rich energy potential of filtrate water. The wastewater heat exchanger HUBER RoWin utilises this energy potential. The primary goal of sewage sludge dewatering on wastewater treatment plants is to increase sludge solids contents. With the presently available state-of-the-art technology dry substance contents of approx. 30% are achieved after dewatering. Related to the inlet load, approx. 25% water are normally extracted from the sludge. This water is returned to the plant along with the wastewater and undergoes the individual treatment steps. But the fact that the separated water has a very high temperature is completely disregarded. Due to the biological activities going on within the digestor at a temperature of approx. 36° C the filtrate hides a huge potential of thermal energy. You only have to use it! The wastewater heat exchanger HUBER RoWin extracts and utilises this thermal energy from the filtrate water. Heat pumps can be used to further increase the effective temperature in order to provide for different possible applications of this eco-friendly method of energy generation. The first to be mentioned is digestor heating. The optimal temperature for the biological processes in the sludge tower, which is normally 36 °C, needs to be maintained. A flow temperature between 40 °C and 50 °C is required; this depends on the type of digestor heating. The high inlet temperature to the HUBER RoWin unit leads to ideal performance coefficients of the heat pump. This energy circulation saves a great part of the conventional heating costs. The recovered energy can be used to heat the social buildings on sewage treatment plants. Operating costs can significantly be reduced by using modern heating systems. About 80% of the effective energy from filtrate water can be recovered if a floor heating is used. If an additional increase of the dry substance content of sewage sludge is required after dewatering in centrifuges or belt filter presses, the market offers several drying methods. They may be supported by the extracted thermal energy from the filtrate water, offering an eco-friendly reduction of disposal costs. Only 18 m³/h filtrate is required to generate about 270 kW thermal output with a temperature of 45 °C by using the HUBER RoWin system and heat pump. The performance coefficients of > 4.5 achieved by the heat pump show an energy expenditure of below 60 kW. If the required electricity is generated from biogas, the financial benefit becomes even more obvious. Especially in summer energy extraction is not only a financial benefit. As the temperature in the WWTP outlet is reduced, also the thermal input into the receiving water course is reduced and algae growth inhibited with a positive effect on water quality. A sewage treatment plant consists not only of energy consuming units but also offers a rich energy source. The wastewater heat exchanger RoWin extracts this previously unutilized energy from the filtrate water and in this way represents the link between this economically and ecologically convincing method of energy production.[...]

[...]One of our guiding principles is to take on our responsibility for the environment and see water, wastewater and energy as a whole. We therefore promote the sustainable use of energy by using innovative technologies. According to a study of the Frauenhofer Institut electric motors are responsible for about 40% of the total power consumption worldwide and about 70% of the power consumption in industries. The international standards IEC 60034-30 dealt with the energy consumption of rotating electric machines already before 2009. The modified DIN EN 60034-30-1 published in 2014 picks up these requirements and tightens the standards even more. It includes all designs of mains-operated three-phase drives. Nominal output powers from 0.12 kW are required. It includes 2/4/6-pole and 8-pole machines. Efficiency classes IE1, IE2, IE3 and IE4 with 50 Hz and 60 Hz Motors for the use in areas where explosive gas-air mixtures are present The future efficiency class IE5 is pre-announced for the next updated issue of the standards. Thus, an adjustment of the requirements to the state-of-the-art level is anticipated also for the next years. With the conventional asynchronous technology this aim can hardly be achieved, or even not at all. This is also the opinion of the standards committee. Our own philosophy challenges us to go ahead of the legislator, the market and the present technology. In the course of the past two years we have reviewed in detail the technical options and innovations of the motor manufacturers. While, two years ago, the focus of the drive manufacturers was on high drive powers, with which an efficiency increase by only few percent could lead to considerable life-cycle cost reduction, the new standards places the focus on the smaller but more frequently used drives. Drive size|Power demand|Market share|Share on energy consumption of electrical drives Small| < 0,75 kW|90%|9% Medium|0.75 - 375 kW|10%|68% Large|> 375 kW|0.03%|23% Total |||approx. 40% of world's energy consumption As the table above shows, no noteworthy energy savings will be possible worldwide with only large-scale consumers. The greatest potential lies in the smaller and medium-size drives. The technical requirements are however higher for the latter as losses in bearings and for cooling can only be limited to a certain extent. Especially with lower powers the present standard motors of efficiency class IE1 as used in "Ex" areas show a comparably poor degree of efficiency. The opposite picture shows how the degree of efficiency of a 1.1 kW drive improves from 75% with IE1 to 87.2% with IE4. This is a reduction of the losses by nearly 50% of what the standards are requesting. We have successfully used synchronous permanent magnet motors in several projects in consultation with the customers. This resulted in a number of benefits: Significantly improved degree of efficiency both in full load and partial load operation High overload capacity IE4 achievable also in "Ex" zone 1 Torque and power control via converters Independence from mains voltage and frequency Speed control We will carry on using the technological advantages of IE4 to further improve the capability of HUBER machines. Some machines with IE4 were already presented at last IFAT trade show in June 2016. We will continue to gradually change more of our machines to IE4 drives as well. In the future, we will control all parameters of the drive via the converter without the need to complete the drive train with individual measurements. We will be able to exploit the full energy saving potential in overload, full and partial load operation. With this innovative technology we and our customers will be well prepared for the challenges we will be faced with during the coming years![...]

[...]Innsbruck, Austria Innsbrucker Kommunalbetriebe AG (IKB) invest into a HUBER Belt Dryer BT 16. With its strategy “ from sewage works to power plant ”, IKB’s wastewater treatment plant Innsbruck sustainably produces energy and intelligently integrates it into its existing system. The aim is to further increase the efficiency of the complete sewage treatment works and make it one of the most modern plants in Europe. With its about 130,000 inhabitants, Innsbruck, the capital of Tyrol, is the fifth largest city of Austria and produces 50,000 m³ wastewater a day (peak: 145,000 m³) together with its 14 neighbouring municipalities. This wastewater is treated on the modern sewage treatment works. Two HUBER Belt Thickener DrainBelt 2.0 units produce approximately 320 m³ thin sludge with 6% to 7% DR per day. Approximately 70 m³ biowaste a day are mixed into the generated thin sludge. The biogas yield of the digesters on the STW increases through co-fermentation. The digesters produce on average approximately 9,000 m³ gas a day. Most part of the gas is used to produce electricity in two block heat and power plants. The exhaust heat generated by motor cooling with a supply temperature of 90 °C is utilised in the medium-temperature range operation of the belt dryer. The rest of the biogas is used in a 1,800 kW hot water boiler for heat production with a temperature level of 140 °C. HUBER implemented in this project a tailor-made two-temperature zone dryer that is operated with both medium-temperature energy from the block heat and power plants and high-temperature energy from the hot water boiler. Modified dryer design for limited available space HUBER modified its belt dryer so that it could be integrated into the existing former sludge dewatering structure: A height reduction of the standard size dryer ensured that the headroom requirements for passage above the dryer were met. The given dimensions of the structure also limited the dryer length. The thermal energy inside the belt dryer therefore had to be distributed to ensure a water evaporation of 2,000 kg/h despite the reduced dryer length. Customised heat concept HUBER planned and designed for IKB a dryer that is tailored to their needs and requirements on this WWTP. In addition to the 330 kW exhaust heat from their existing block heat and power plants, the biogas is efficiently utilised for the production of thermal energy in a high-temperature boiler. Reliable operation of the drying plant even during maintenance and inspection of the block heat and power plants is guaranteed as the dryer is equipped with an additional heat exchanger that makes it possible to transfer the high temperature heat to the medium temperature range operation. In the event of failures or when maintenance and inspection work is carried out on the block heat and power plants, the dryer changes fully automatically to pure high-temperature operation. This further increases the dryer’s operating hours and ensures that the sludge volume to be dried is processed reliably. The positive energy balance of this IKB’s sewage treatment works is further improved with the operation of the HUBER Belt Dryer BT 16. An additional finned heat exchanger upstream of the condensation stage extracts more than 400 kW thermal power on a temperature level of 70 °C and feeds it to the on-site heating system. The excess heat is fed to a district heating grid to which the indoor swimming pool of the former Olympic Village and a nearby lake restaurant are connected. A cleaning system developed by HUBER is used to periodically clean the heat exchanger fully automatically and during active operation to permanently guarantee the extracted thermal energy. Intelligent HUBER throughput control The feed pump of the belt dryer is fed by six HUBER Screw Press units with a constant inlet DR of 25%. The screw presses, sludge pump and belt dryer form one process unit on this STW. The control systems of these components communicate via direct connection. The intelligent HUBER throughput control system is able to detect even minor variations in the outlet DR of the screw presses already before dryer feeding, for example seasonal variations due to the biowaste. The throughput control system balances even differences as small as ± 0.5% DR by DR-dependent reduction or increase of the dryer throughput. This ensures a constant water evaporation and thus constantly maximum plant efficiency. Of course, the dryer can optionally be operated with a lower throughput according to the volume of sludge generated in the sewage treatment process. The dryer fully automatically reacts flexibly and efficiently to varying requirements. Maximum energy efficiency The HUBER Belt Dryer BT 16 at Innsbruck positively contributes to achieving climate protection goals. Both thermal and electrical energy supply are achieved by means of regenerative energy in the form of biogas from co-fermentation. Additionally, approximately 400 t CO 2 a year can be saved due to 450 fewer truck transports that were necessary before. Convincing is the remarkably low energy consumption of the Belt Dryer BT 16 with a maximum thermal energy consumption of 0.8 kWh per kg water evaporation and an electrical energy consumption of below 0.0375 kWh per kg water evaporation. These values set new standards in the field of belt dryers. Time management and project schedule We were faced with a tight schedule at any time during this project. The contract was signed at the end of 2016, the installation work on site started already in mid May 2017, and commissioning took place at the beginning of August. The dryer with its many innovations was planned, built, installed and commissioned within eight months (from the date of order placement). After a successful test operation phase with a convincing performance test, the plant was handed over to IKB in December 2017. Facts and figures: Site: Innsbruck, Austria Size: HUBER Belt Dryer BT 16 with two temperature zones Dryer length: 19 m Water evaporation: 2000 kg/h Throughput: 21,176 t/a (2,647 kg/h) Operating time: 8,000 h/a Drying efficiency: from 22% DR to 90% DR Heat sources: medium temperature source: biogas block heat and power plant with 90 °C high temperature source: biogas block heat and power plant with 140 °C HUBER Sewage Sludge Drying with HUBER Belt Dryer BT[...]

[...]HUBER Technology are long established experts in wastewater and wet treatment processes. As a leading supplier of stainless steel treatment equipment, we offer the highest quality, innovative solutions designed to withstand operation in difficult environments with minimum maintenance. We provide decades of experience and the highest level of quality and service, so that our wastewater treatment equipment is the last you will need to install. HUBER’s range of products includes: Solids and screenings removal, fine screens, coarse screens and micro screens Washing, conveying and compacting of solids and screenings Sludge screening, thickening, dewatering and drying Grit removal and treatment Dissolved Air Flotation Filtration Optimisation of anaerobic digestion, with pre and post digestion treatment Heat recovery from wastewater With the recent change to food waste collection requirements in the Environmental Act, and a new Green Heat Network Fund worth £288m which opened in April 2022, AD site operators are looking to optimise existing sites ready for these changes by local councils coming into force from 2023. From 2023, local authorities will be legally required to collect food waste separately and recycle all the waste that cannot be redistributed. When introduced, the changes will see food waste collected separately from all households, businesses and organisations, with Defra committing to eliminating food waste from landfill by 2030 and working closely with local authorities to end confusion over household recycling and ensure food waste is routinely collected from all premises across the country. Our team at HUBER has worked closely with AD planners/designers, site operation managers, and has extensive experience of providing solutions tailored to the individual client’s needs. With an understanding of the processes involved and knowledge of the wide range of HUBER products available, unusual applications are not a problem. By approaching each new project with the aim of understanding the problem or specific requirements, solutions are as unique as the problems they solve. Our team will look at how we can help your AD plant run more efficiently and what process enhancements could be made to optimise the whole plant, both pre and post digestion solutions can be provided by HUBER. Examples of where HUBER solutions can improve AD processes: Pre-Digestion Feedstock grit removal and washing using the HUBER Longitudinal Grit Trap ROTAMAT® Ro6 and HUBER Grit Washer RoSF G4E Benefits include, increased gas yield, reduced maintenance/ downtime and asset lifetime increased Packaging compaction using the HUBER Screenings Wash Press WAP® and HUBER Screenings Compactor Ro7 Benefits include-Increased gas yield, reducing volume for disposal and cleaner screenings Post-Digestion AD Digestate screening – using the HUBER Sludgecleaner STRAINPRESS® Benefits include-Help meet PAS110, improved digestate quality and dry oversize for disposal AD Digestate Dewatering using the HUBER Q-PRESS® Benefits include- Digestate volume reduction, reduced storage and transport costs and high quality fertilizer. We are excited to support our customers on new plants and are keen to be involved in the early stages of planning a plant to ensure all areas of the process are considered. With a range of trial units available, help with onsite trial / development work can be undertaken.[...]

[...]Entrance handle, completely made of 1.4307 (AISI 304 L) stainless steel Consisting of bent pipe 33.7 x 2.0 mm with fixing plates for wall fixing. Entrance handle, completely shielded arc welded, acid-treated in a pickling bath and passivated. Optionally available in: 1.4404 (AISI 316 L) stainless steel Stainless steel fixing material: stud anchors[...]

[...]Equipment in Stainless Steel: Safe Access Solutions A comprehensive program of equipment in stainless steel for buildings related to water treatment Innovative stainless steel products and Safe Access Solutions for Drinking water delivery, treatment, storage and distribution Wastewater treatment Stormwater overflow tanks Biogas plants Manholes > To the HUBER Digital Platform Innovative stainless steel products and Safe Access Solutions for Drinking water delivery, treatment, storage and distribution Wastewater treatment Stormwater overflow tanks Biogas plants Manholes > To the HUBER Digital Platform Safe Access Solutions Product Categories Manhole Equipment Technical Doors and Windows Air filtering for Drinking Water Storage Tanks In line with our mission to be the best, we only manufacture in stainless steel. HUBER stainless steel products for Safe Access Solutions provide unparalleled quality for municipal and industrial water and wastewater treatment applications - Unrivalled lifespan Absolute corrosion resistance due to acid treatment in a pickling bath and passivation Standardised products provide safety for planning and cost advantages Hygienic conditions on the highest possible level provide safety for users and environment Download overview brochure: "HUBER stainless steel equipment" State of the art stainless steel production technologies and highly skilled employees ensure products meet the most stringent customer demands. We are certified according to ISO 9001, ISO 45001, ISO 14001 and EMAS. To ensure continuously high quality products and solutions for our customers, HUBER pursues the philosophy of a high vertical integration in production. This requires specialised manufacturing equipment and skills. Advanced automation and computer aided production techniques results in increased precision and minimised errors during production.[...]

[...]Erlangen, Germany Convincing belt drying solution for sewage sludge At the beginning of 2021, HUBER was awarded the contract for the supply of a HUBER Belt Dryer BT 16 for WWTP Erlangen after an EU-wide public tender. In the run-up to the tender for this advanced sludge treatment project for a volume of 15,700 t/a, several processes were investigated. These were: Solar Sewage Sludge Drying Hydrothermal carbonisation Belt drying The decision was made in favour of the belt drying option, as this drying process allows the sewage sludge to be dried continuously to >= 90% DR. The thermal energy demand of the drying plant is ensured 100% by renewable energy from the existing combined heat and power system of the sewage treatment works as well as from a combination of PV systems and heat recovery using high-temperature heat pumps. The electrical energy needed for belt drying is also generated 100% by renewable energy from digester gas converted into electricity in the combined heat and power plant. The sewage sludge, dewatered to approx. 28% DR, can be temporarily stored in the existing sludge silo and discharged via screw conveyors into the feed hopper of the thick sludge pump. The eccentric screw pump conveys the sludge into the extruder of the dryer. An inline inlet DR measurement is installed in the sludge line to continuously measure and record the DR content of the dewatered sludge. Based on the measured values, the drying plant is automatically and optimally adjusted to the sludge currently being fed. In the extruder itself, the sludge is pressed through a die and the sludge “spaghetti” are then fed onto the upper belt of the dryer, which ensures high permeability for the dryer air flowing through. The upper dryer belt transports the fed sludge once in longitudinal direction through the dryer. In the process, the heated dryer air flows through the belt and through the sludge lying on the belt from bottom to top and dries both. At the end of the belt, the sludge falls into the transfer box, is then evenly distributed on the lower belt and transported through the dryer again in the opposite direction. In this process, the sludge is further dried to the required 90% DR. The DR and temperature measurement installed at the end of the lower belt continuously monitors the moisture and temperature of the dried sludge and adjusts the control of the dryer fully automatically. This ensures that the required degree of drying is reliably maintained. The dried sewage sludge is then transported via an angular bucket elevator into a dry material silo. From there, the dried sludge granulate is transported by silo vehicles to the thermal utilisation plant. The exhaust air is cleaned in an acidic and a basic scrubber and then fed into a biofilter.[...]