Search

[...]Braunschweig, Germany The "baby" solar dryer is back In 2012, HUBER SE manufactured a mobile solar dryer in a container for Expoval Sludge, a research project supported by the Federal Ministry of Education and Research (BMBF). The dryer was extensively tested in cooperation with the Institute for Sanitary Engineering of the Technical University of Braunschweig in Germany, in Poland and in Colombia. The results achieved with the dryer were summed up in a DWA work sheet on solar sludge drying. The baby solar dryer was recently taken out of the research project and overhauled. In autumn this year, it will be shipped to South America where it will be used for drying tests on several municipal and industrial sewage treatment plants. This should have a sales-promotional effect on the sales of HUBER solar dryers. On the trail of odours As part of the master's theses of two students from the Technical University Amberg-Weiden a laboratory cabinet dryer was modified and tested for exhaust air measurements. The aim of the students' theses is to enable predictions to be made on odour-carrying substances in the exhaust air from the solar dryer. For this purpose, the temperature range was altered from 30 to 70 °C and also the pH value and the return rate for the dry material were modified. Then, the effects on the ammoniac content in the exhaust air were measured. It turned out that the ammoniac content in the exhaust air is reduced if dry material is mixed into the dewatered sludge as it is the case with the HUBER Sludge Turner SOLSTICE®. The reduced ammoniac content leads to a significant reduction of ammoniac emissions. On the other hand, it appears that the ammoniac load in the dryer exhaust air increases as the temperate rises, as it is the case in warmer regions or in case of additional utilisation of exhaust air in the solar dryer (floor heating or hot air). The measurements on the large-scale sewage sludge drying plant at Bayreuth are to be used to compare the laboratory data with the real data gained from practical experience. The decision whether or not an exhaust air treatment is required for the solar dryer has a significant influence on the investment and operating costs of the solar sewage sludge drying plant.[...]

[...]Ingelheim, Germany HUBER Active Carbon Filter CONTIFLOW® GAK: The quaternary treatment stage Boehringer Ingelheim Pharma GmbH & Co.KG was founded by Albert Boehringer in Ingelheim on the Rhine in 1885. The company operates a central wastewater treatment plant on their research and development location in Biberach an der Riß (Baden-Württemberg). The treated wastewater is discharged directly to the receiving water course. As part of a research project investigating the reduction of trace substances and micropollutants, a partial flow of the wastewater generated daily is treated there. This partial flow comes from two lines operated in parallel. The wastewater from the first line flows into a HUBER Active Carbon Filter CONTIFLOW® GAC. In the CONTIFLOW® filter, the adsorptive elimination of the micropollutants on the inner surface of the active carbon takes place. The wastewater from the second line is pretreated with ozone before it is passed into a HUBER Active Carbon Filter CONTIFLOW® GAC, he design of which is identical with the one used for the wastewater from the first line. When in contact with ozone, the micropollutants are oxidized. The generated transformation products are usually readily biodegradable and well adsorbable. A dosing station for the most different trace substancesand micropollutants is installed in the inlet to both lines. Due to the targeted dosing of different substances the research project delivers interesting results for both municipal and industrial applications. Under this research project, the effects of upstream ozonisation on a HUBER Active Carbon Filter CONTIFLOW® GAC are examined over a period of 18 months. The expected research results include not only an increased efficiency for the elimination of micropollutants but also a longer life of the active carbon.[...]

[...]Heating and cooling with wastewater as a regenerative energy source Buildings play an important role in the fight against the threat of climate change. Worldwide, real estate is one of the largest consumers of fossil fuels, which are used for heating and cooling, among other things. Rising living standards and the overall increase in population will cause consumption to rise further if we do not succeed in improving energy efficiency. In addition to the right choice of building materials and good thermal insulation, the most important thing is to choose the right system for heating and cooling. HUBER has solutions that allow to use the wastewater in the sewer station as a regenerative energy source. HUBER solutions for heating and cooling with wastewater Wastewater heat exchanger in combination with heat pump Particularly efficient solutions can be achieved with heat pumps that draw energy from the wastewater and not from the outside air. Since wastewater is significantly warmer in winter and significantly colder in summer than the outside air, the heat pump can be operated with a higher degree of efficiency. The core of the entire process is a HUBER Heat Exchanger RoWin , which extracts energy from the wastewater, combined with a heat pump, which raises the energy for heating to a higher temperature level and thus makes it usable for larger buildings. Wastewater heat pumps can not only be used for heating buildings and the water in large buildings, but are also suitable for cooling rooms during the warmer months of the year. The heat pump works in reverse, i.e. it extracts heat from the building and transfers it to the wastewater with the help of the HUBER Heat Exchanger RoWin. Large properties near large sewers or the sewage treatment plant A prerequisite for using wastewater as a regenerative energy source is a sufficient amount of wastewater. For this reason, property locations that are close to large sewers or sewage treatment plants are particularly advantageous. Suitable buildings are all properties that have a high heating and/or cooling demand, such as hotels, shopping centres, administrative buildings, schools, homes, housing estates, industrial buildings, hospitals, swimming pools. Heating and cooling with wastewater : HUBER has the right solutions for heating and cooling large buildings using wastewater energy from the sewage system or wastewater treatment plant.[...]

[...]Universally applicable for controlled ventilation of buildings, especially in the field of potable water supply, and for plants with increased security requirements. Rigid safety louvre TT2.JW (for external face of the wall), attack proof, ready for installation, of rigid all welded construction, completely made from 1.4307 (AISI 304 L) stainless steel. Frame, made from Z profile , 3 mm thick, designed for internal bolted fixing, with access to the anchors only from the interior wall surface. Slats, 3 mm thick , rigidly welded, with the slats staggered so that penetration is impossible even with moveable hoses. With 1 x 1 mm fly screen on the inside. 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 Lacquered on the outside Ground surface finish Additional internal frame with removable fine filter for dust and pollen, held by wing nuts Fixing material[...]

[...]Frame window, rigid, ready for installation Made from two-sheet special 1.4301 (AISI 304) stainless steel profile with intermediate special plastic core to prevent thermal conduction, thermally insulated according to EN 10077, Uf = 2.70 W/(m²*K). Glazing bead invisibly fastened . Frame, designed for dowelling into window soffit, including fixing material. Machine ground surface finish. Dry glazing with insulation glass, without KTW approval Options 1.4404 (AISI 316 L) stainless steel Special glazing (e.g. security glass) Outside window sill made from stainless steel Water chamber window, with drain holes towards the dry side, wet glazing KTW approved Secure to prevent forced access according to DIN EN 1627, RC3 (only possible with wet glazing) Multi-wing window Other designs available on request[...]

[...]Zell am See, Austria The Austrian municipalities Zell am See and Bruck an der Glocknerstraße operate a water supply facility together which is fed from a spring at 940 m above sea level. The minimum delivery of the spring is about 40 l/s. It lies in the Fuscher Valley near Salzburg in the Glockner mountain chain. The highest peak of the Glockner mountains and Austria's highest mountain is the Großglockner. Directly after the well shaft the drinking water flows through an inverted syphon through the valley bottom to the inlet structure where it is filtered by a HUBER RoDisc® screen. The RoDisc® screen is equipped with 10 discs which are covered with a 18 µm stainless steel mesh. The screen is used for the first stage of water treatment and serves to protect downstream systems. It retains the minerals contained within the spring water, mainly small plates of mica schist which especially occur after storms and during the melting of snow in spring. The RoDisc® screen not only protects the turbine, it also improves the pollution prevention in the drinking water reservoir. The normal capacity of the water works is 370 MWh/a which is equivalent to the supply of about 85 households. Initially, cylindrical reversible flow filters were planned to be used which are known from many drinking water applications. Due to the right information at the right time the customer's decision makers immediately recognised the benefits of the RoDisc® screen. As no DVGW or ÖVGW test guidelines were available for this type of filters, the customer insisted to have the non-metallic materials tested for their suitability. For the use of the RoDisc® screen in a drinking water application the non-metallic materials required the KTW certification and DVGW certification according to work sheet W270. The results of the tests according to the DVGW work sheet W270 confirmed that, in terms of microbiological aspects, the non-metallic materials tested are suitable to be used in drinking water applications. The KTW certification tests showed that the non-metallic materials used do not give off any substances to the drinking water and do not unacceptably affect the drinking water. Two of the benefits the RoDisc® screen offers were the main reason why the customer decided to buy the HUBER product: First, the HUBER RoDisc® screen operates with a very low pressure difference of 10-15 cm WC. Second, HUBER does not use any adhesives in the manufacturing process. Other advantages of the HUBER RoDisc® screen are its space-saving design and filtration by gravity due to the small pressure loss. The height difference between the water level upstream and downstream of the RoDisc® screen is the driving force in the filtration process. It is not necessary to lift or suck of water. The RoDisc® screen can easily be tailored to suit specific site requirements and minimises the requirements for structural measures. It is a simple, economical and efficient solution. Water works operators are therefore well advised to think about whether to use a HUBER RoDisc® screen to pretreat drinking water.[...]

[...]STP Vorra , Germany STP Vorra chooses a HUBER RoDisc® Screen The trickling filter plant with separate secondary clarification tank on STP Vorra was built in 1982 and had to be redesigned in 2006 to meet ATV-DVWK A281 standards. It was necessary to build a new bigger secondary clarification tank with a volume of 350 m³. Taking into account the conditions on site (soil properties, high groundwater level) the costs for building this new clarifier (including sheet pile, unwatering, distribution structure, inlet/outlet line, secondary clarification tank) were estimated to amount to approximately € 525,000. In search of low-cost alternative solutions plant manager Mr. Sauerbrey contacted HUBER SE in 2007. Within a very short time we came to the conclusion that the desired improvements could be achieved with the use of a RoDisc® screen. It was the wish of the municipal council to run tests at first to be sure about the actual operating efficiency of our screen. The test unit achieved the requested results for all parameters. Test results: Inlet AFS = 22 mg/l -> Outlet AFS = 8 mg/l Inlet COD = 51 mg/l -> Outlet COD = 37 mg/l After thorough investigation of technical options by the engineering office Siegle it was decided in 2009 to have another design proposal prepared that should include the alternative of a disc filter system for installation downstream of the existing secondary clarification tank. The total costs for this measure were now estimated to amount to approximately € 330,000. Additionally, another € 50,000 could be saved with execution planning. So, compared to a conventional solution (building a new secondary clarification tank), the investment costs could be reduced by approximately € 250,000 and also the required parameters can be fully met. After placement of the order for the supply and installation of the HUBER RoDisc® screen at the end of 2011 the screen was commissioned already in June 2012 and has since operated to the full satisfaction of the plant operators. HUBER SE would like to take this opportunity to thank everyone involved in the project for their cooperation and confidence in our products and services, in particular the customer (municipality of Vorra), the operating staff on site, plant manager Mr. Sauerbrey, and the engineering office Siegle from Nuremberg.[...]

[...]„There is one thing that is for sure: The age of cheap energy is over!“ Nobuo Tanaka, executive director of IEA (International Energy Agency) This describes with few words why it is becoming increasingly important to recover used energy. The below examples of projects that use wastewater and process water heat show how energy recovery can successfully be realised in practice. Energy recovery from vapour water In sewage treatment plants vapour water is generated during the sludge dewatering process and is also present in the wash water of the exhaust air treatment systems of sewage sludge drying plants. We have already realised two projects (ARA Bern in Switzerland and Lindenschmidt KG in Germany) where, with the use of the HUBER Heat Exchanger RoWin, considerable amounts of energy are successfully recovered from such kind of wastewater with approx. 1% DS through cooling. The figure shows an example layout of such an application for a sewage treatment plant size of 100,000 PE. The example shows that more than 50 kW heat can be extracted from the vapours and passed on to a heat pump that produces approx. 750 kW heat from these vapours which are available to be used to heat digester sludge and/or a building area of up to 25,000 m² (= 3.5 times the size of a soccer field) or for external district heat supply. The investment pays off after a short time and the significantly improved carbon footprint additionally justifies the investment costs. Another positive side effect is that precipitation takes place while the wastewater is cooled so that annoying growth in pipelines is prevented. The generated solids can be removed from the heat exchanger and disposed of separately. HUBER Heat Exchanger RoWin for direct preheating of process water in a hospital A flow of high-temperature wastewater is passed through the heat exchanger through which fresh drinking water flows from the other side. In this case, it is not necessary to use a heat pump as the heat already has a high temperature level. In the university hospital "Klinikum rechts der Isar" in Munich heat is directly recovered from the surgical instruments washers and returned to the washers on the fresh water side. Heat recovery in such a small circuit offers two advantages: First, the systems used are relatively simple in most cases and therefore cheap to implement. Second, the time offset from when the warm wastewater is generated to when fresh water is needed is short. The unique buffer function combined with the patented cleaning of the HUBER Heat Exchanger RoWin makes this application so efficient. RoWin for a win-win The company Lindenschmidt KG in Kreuztal, Germany, is a disposal company for problematic oil-containing materials. Biological degradation of these materials leads to a strong rise of the wastewater temperature in the aeration tank so that cooling is welcome. With the use of the HUBER RoWin Heat Exchanger energy can be extracted from the waster in the bio-system and directly passed on to the waste oil storage tank. This solves two problems at a time: First, the temperature in the bio-system is optimised. Second, fossil energy carriers that would be required to heat the waste oil storage tanks can be saved. A variety of application possibilities in various industries The basic idea of these economical applications for heat recovery from polluted media can also be transferred to for example food industries (preheating of feed water for vapour generation), paper mills as well as disposal companies and other producing industries that generate warm/hot wastewater.[...]

[...]Rope and Chain Pull Rakes Sturdy cable or chain operated coarse screens protect pumping stations and wastewater treatment plants Products and Variants HUBER Grab Screen TrashLift Rope and Chain Pull Rakes HUBER Basket Screen CageLift Rope and Chain Pull Rakes HUBER Wastewater Screens with Rope or Chain Hoists Offer: Reliable removal of all types of coarse material Space-saving design due to vertical installation Bar spacings from 20 mm to 150 mm Easy to retrofit into existing channels, pumping stations and intake shafts[...]

[...]Maintenance opening, especially in the field of potable water supply Access cover, pressure-tight up to a water gauge of 5 m, ready for installation, round, completely made from 1.4307 (AISI 304 L) stainless steel, with intermediate sealing suitable for the specific application, can be lined on both sides. Blank cover with lock and two handles for easy operation, connected with the frame by means of screwed joints. Frame, designed as F-piece with centrally welded wall flange, provided for embedding in concrete. Frame with lifting eyes. Blank cover and frame shielded arc-welded and acid bath cleaned before washing, drying and surface passivation. Application: Drinking water (KTW certified sealing) Wastewater (rubber seal SBR) Biogas (rubber seal EPDM E628 70 ± 5 Shore) Options 1.4404 (AISI 316 L) stainless steel Centrally installed inspection window, inside diameter: 150 mm, with or without window wiper Sanding of frame parts in contact with concrete Stable maintenance-free hinges screwed to the frame, can be lined on both sides. (Please indicate the door opening option.)[...]