digester heating Articles
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Combined Experiences of Thermal Hydrolysis and Anaerobic Digestion
Historical Perspective of Thermal Hydrolysis First experiments in US 1976 – Haug et al Thermal pre-treatment prior to anaerobic digestion may result in net energy production from the system because of increased biodegradability and reduced digester heating requirements. Recycling of liquid side streams from thermally pre-treated digested sludge should not significantly increase the oxygen ...
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Thick sludge digestion - research design and validation of key process unit operations
ABSTRACTAdvances in the design of anaerobic digesters have seen a trend towards digestion of thicker sludges in the US, UK and elsewhere. This includes a number of new facilities using bolt on technologies to mesophilic anaerobic digestion such as Cambi Thermal Hydrolysis, Prepasteurisation and Biological Hydrolysis. Cambi Thermal hydrolysis utilises thickenedsludge and the digestion process is ...
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H2 consumption by anaerobic non-methanogenic mixed cultures
The impact of H2 consumption, by homoacetogens, on the overall hydrogen yield in mixed culture fermentation is the focus of this study. Batch reactors were used to test the ability of anaerobic digested sludge, heat treated to eliminate methanogens, to produce and consume molecular hydrogen. The measured average hydrogen production rate from 4.2 g glucose/L was 44 ± 4 mmol H2/L sludge · d, while ...
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ARA Meiningen (AUT) Municipal Plants - Case Study
Digester: 1 x 4.000 m³ sewage sludge digestion Scope of services: sewage sludge digester agitator, flare, heat exchanger, gas equipment Start-up: ...
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Grosuplje (SLO) Municipal Plants - Case Study
Digester: 2 x 635 m³ sewage sludge digestion Scope of services: sewage sludge digester agitator, flare, heat exchanger, gas storage, gas equipment Start-up: ...
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Sewage pre-concentration for maximum recovery and reuse at decentralized level
Pre-concentration of municipal wastewater by chemically enhanced primary treatment (CEPT) was studied under controlled laboratory conditions. Both iron and aluminium-based coagulants were examined at gradually increasing concentrations (0.23, 0.35, 0.70 and 1.05 mmol/L). The CEPT sludge generated from different coagulation experiments was digested in batch anaerobic reactors, while the ...
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Combined experiences of thermal hydrolysis and anaerobic digestion – latest thinking on thermal hydrolysis of secondary sludge only for optimum dewatering and digestion.
ABSTRACT The basic principles of batch thermal hydrolysis process (THP) are well known as a pre-treatment to anaerobic digestion (AD) . Early work done in the 70s in the USA and the 80s in Japan demonstrated the optimum time and temperature for thermal hydrolysis being 340 F for 30minutes. These principles have been put into full practice in 20 plants around the world at plants ranging from 5 ...
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Digester temperature - to heat or to cool?
Maintaining an optimal digester temperature is a key aspect of maximising biogas production and overall process efficiency in anaerobic digestion. Not only is temperature essential to maintain a healthy colony of bacteria, but it can reduce retention times and improve material circulation – thereby helping to increase the production capacity of the whole process. In terms of temperature ...
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GTI Cover at Pinnacle Foods Harnesses Energy from Anaerobic Digestion
The Customer: Pinnacle Foods is a leading producer of quality branded food products, which can be found in 85 percent of American households. The Customer’s Needs: When Pinnacle Foods’ acquired the Wish Bone® and Western® salad dressing businesses, its production plant in St. Elmo, Illinois, USA, would need to expand for additional flow. As part of the wastewater treatment ...
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Sludge drying and disposal ways
With the rapid growth of urbanization in my country in recent years, a large number of centralized sewage treatment plants have been added and expanded, and the output of sludge has increased rapidly. It is estimated that the annual output of dewatered sludge will reach 30 million tons. Whether from the perspective of pathogens or heavy metals, the traditional treatment methods of direct ...
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Hydrogen Production from Sewage Sludge
Hydrogen production has become a popular alternative to fossil fuels, and our customers at the University of Glamorgan conducted research on how fermenting sewage sludge can result in the production of hydrogen. Using sewage sludge as a base for fermentative hydrogen production offers several advantages over other biomass sources including it being low-cost, readily available wherever there are ...
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Thermal protection - WWTF gets ahead of the curve with thermal mass flowmeters
For the Santa Cruz Wastewater Treatment Facility (WWTF), dependability matters. Since 1989, this state-of-the-art WWTF, nestled in a shallow canyon in the coastal city of Santa Cruz, Calif., has been leading the way for renewable energy programs and environmental protection in the West. Santa Cruz WWTF generates its own electric power by using internal combustion engines that burn a mixture of ...
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Producing biogas from solid wastes – Case Study
Santa Cruz Wastewater Treatment Facility, located in Santa Cruz, California, generates the majority of its own electric power by using internal combustion engines that burn a mixture of methane gas produced by the sewage digestion process and purchased natural gas. Combined, they producing 7.4 million kWh of electric power per year. Producing abundant, healthy amounts of biogas each day in their ...
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Huber sludge treatment plant on the black sea coast - Case study
The Bulgarian Black Sea Coast along the city of Varna with 300,000 residents is an important economic factor, especially due to its touristic potential. The European Union decided in 2002 to give aid money for the protection of the Black Sea, in particular for upgrading and building new local sewage treatment plants. The capacity of the sewage treatment plant at Varna could therefore be expanded ...
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Towards energy neutrality by optimising the activated sludge process of the WWTP Bochum-Ölbachtal
As a result of Ruhrverband's regularly performed energy audits the wastewater treatment plant (WWTP) Bochum-Ölbachtal shows substantial deficits concerning energy efficiency. Due to the energy consumption of internal recirculation, mixers and return activated sludge (RAS) pumping the existing pre-denitrification process configuration offers a specific energy consumption for biological ...
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GA3000 PLUS fixed biogas analysis system at Harper Adams - Case Study
Plant manager, James Wood, wanted to monitor biogas composition automatically 24 hours a day, seven days a week. He wanted his own independent analysis of the gas mix and to record it in detail, especially the percentage of methane, hydrogen sulphide and carbon dioxide. How the company uses the GA3000 PLUS product James said: “We want our own gas analysis record of the biogas quality we ...
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GA3000 fixed biogas analysis system at Harper Adams case study
About the customer Harper Adams Energy in Shropshire, England, is responsible for running the anaerobic digestion plant at Harper Adams University College. The challenges the customer faced Plant manager, James Wood, wanted to monitor biogas composition automatically 24 hours a day, seven days a week. He wanted his own independent analysis of the gas mix and to record it in detail, especially ...
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French biogas plant relies on Bredel hose pumps for hot abrasive slurry handling - Case Study
One of the largest biogas plants in France has recently been commissioned, with three Bredel 65 hose pumps from Watson-Marlow Fluid Technology Group (WMFTG) at its core. The pumps are being used to transfer homogenous abrasive slurry in three process stages vital for the sustainable supply of energy in the region. The new biogas plant, which was designed, built and commissioned in 2017, is set ...
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Pellet Making Machine Animal Nutrient Requirements
Poultry diets must be formulated to provide all of the animal’s nutrient requirements if optimum growth and production are to be achieved. Pellet making machine can make poultry feed pellets, Zhengzhou Fusmar machinery is a professional feed pellet machine manufacturer. Animal Nutrient Requirements There are six classes of nutrients: 1. Carbohydrates, the major source of energy for ...
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CORK, Ireland: INNODRY 2E®–Complete sludge treatment solution including dewatering, drying and granulate storage
Cork WWP (Ireland) was designed in 2000. The specifications did require a complete sludge treatment solution including dewatering, drying and granulate storage. The system was to take maximum advantage of the biogas produced by digesters as well as any surplus heat used for the heating of the digesters. The drying equipment had to be flexible in order to cover the varying production rates and, at ...
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