digestate stream Articles

  • Full-stream and part-stream ultrasound treatment effect on sludge anaerobic digestion

    The use of ultrasound as pre-treatment to improve anaerobic digestion of secondary sludge has been established as a promising technology. There are great differences between lab scale and full-scale devices, regarding the relationship between the disintegration achieved and the energy supplied. Based on economic aspects, most of the full-scale plants use partial-stream instead of the full-stream ...


    By IWA Publishing

  • Digester Developers Target Mixed Organic Waste Streams

     emerging group of commercial companies see a viable business opportunity in North America around building, owning and operating larger scale anaerobic digestion (AD) facilities to process mixed organic waste streams. In some instances, the projects being proposed and constructed only include anaerobic digester operations. In others, there is a combination of digestion with back-end ...


    By BioCycle Magazine

  • Nutrient Removal from Anaerobic Digester Side-Stream at the Blue Plains AWTP

    ABSTRACTImplementation of a novel sidestream treatment configuration will provide the Blue Plains AWTP sidestream treatment process the flexibility to operate in four different process modes including the MAUREEN, SHARON, STRASS and DEMON configurations. Each process confers specific benefits to the AWTP that will need to achieve stringent nutrient limits to support ongoing efforts within the ...

  • Anaerobic Digestion—What Are the Economics?

    Although solid waste AD facilities are just starting to emerge, haulers and their customers may see some benefits if the development trend continues. A Pro Forma Model objective can be constructed for strategic planning of an anaerobic digestion facility. Anaerobic digestion (AD) of food wastes in the U.S. is a developing market that is poised for continued growth in many regions. ...


    By Waste Advantage Magazine

  • The dirty little secret of anaerobic digesters

    First, I want to state that I am a firm believer in the benefits of anaerobic digesters as both technologies to reduce solid wastes, and also as means of creating clean, renewable fuel. With the abundance of animal and vegetable wastes clogging landfills and polluting rivers and aquifers, plus the rising cost of power, the non-use of anaerobic digesters (both as a revenue generator and a cost ...


  • Treatment of wastewater from anaerobic digestion

    The Client The customer is power plant which produces biogas from biomass and sewage farm, through anaerobic digestion and thermal recovery, located nearby Munich in Germany. The Client’s needs Biogas is produced by the fermentation of organic substances of animal and vegetal origin in absence of oxygen (anaerobic process). This process produces a ...

  • Building Farm And Food Scrap Digesters

    In the past several weeks, we received invitations to two ribbon cuttings for newly installed farm-based digesters — one at a dairy farm in western Massachusetts and another at a swine operation in North Carolina. We also received a press release from the University of California, Davis, about its new food scraps digester on campus. And then there were a few new projects that we had been ...


    By BioCycle Magazine

  • Quantifying the impacts of co-digesiton of waste streams with sewage sludge

    In order to slow down the impending impacts of global climate change due to consumption of fossil fuels, governments are looking at ways to develop and incentivise alternative renewable energy sources. Subsequently, the UK has imposed renewable energy targets of 15% of all energy consumption by the year 2020, but admit that – in order to meet carbon dioxide reductions of 20% by 2020 – renewable ...


    By United Utilities

  • Steam injection heating of biosolids & sludge for Anaerobic Digestion

    The article focuses on the integration of Direct Steam Injection (DSI) heating as a method for heating of Municapal, Industrial, Food, & Agricultural wastewater streams. Common applications are anerobic digestion, biogas production, waste de-activation, and FOG (Fats-Oils-Grease) heating. Topics covered include how DSI works, how to select a DSI heater suitable for viscous & difficult to ...


    By ProSonix

  • Autotroph-Hetertroph Interactions in Activated Sludge: Bioaugmentaion from Side-Stream Treatment

    Successful engineering of bioaugmentation for wastewater treatment requires an understanding of microbial ecology. Therefore, the aim of this work was to examine one aspect of reactor ecology: potential interactions between heterotrophic bacteria and ammonia oxidizing bacteria. Microscopic observation, macroscopic observation, and molecular biology techniques were utilized to characterize ...

  • Integrated side-stream reactor for biological nutrient removal and minimization of sludge production

    Integrated processes to reduce in situ the sludge production in wastewater treatment plants are gaining attention in order to facilitate excess sludge management. In contrast to post-treatments, such as anaerobic digestion which is placed between the activated sludge system and dewatering processes, integrated technologies are placed in the sludge return line. This study evaluates the ...


    By IWA Publishing

  • European Experiences With the Treatment and Digestion of Bio-Organic Waste

    In the area of waste management environmental awareness has essentially increased and according technologies got more and more accepted in Europe within more than ten years now. During all the time BTA has gathered experiences by developing and realising flexible concepts for biowaste treatment plants of different design and capacities for the treatment of various waste streams: full scale plants ...


    By BTA International GmbH

  • 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 ...


    By Cambi AS

  • Promotion of nitrifiers through side-stream bioaugmentation: a full-scale study

    Bioaugmentation of nitrifiers from a side-stream treatment is an efficient method for boosting the mainstream process at a wastewater treatment plant (WWTP). Although this technology has been known for several years, the number of full-scale applications for it is limited. For a WWTP approaching its critical nitrogen load capacity, the benefits are doubled if the introduced side-stream ...


    By IWA Publishing

  • Molecular Chemical Grinder Improves Digestion in Sludge

    Municipal wastewater treatment plants (WWTPs) can reduce the costs and liabilities of sludge handling and disposal and increase their organic solids conversion rate with the Advanced Fluidized Composting (AFC) Process or the Advanced Fluidized Co-Digeson & Co-Generaon (AFC2) Process from BioConversion Soluons, LLC (BCS). The conventional sludge treatment techniques of aerobic and anaerobic ...

  • Digester Developer Taps Natural Gas Markets

    IN the late 1990s, Dan Eastman and two colleagues were researching business opportunities in the renewable energy industry. They were looking for a commercially viable technology that could take renewable energy from an experimental phase to a solid business investment. In 1999, Eastman and his partners founded Microgy, Inc., with its base in Wisconsin. The company licensed the Xergi anaerobic ...


    By BioCycle Magazine

  • Toronto moves forward with anaerobic digestion of residential SSO

    In June 2007, Toronto's City Council approved the “Target 70” plan to achieve 70 percent diversion by 2010. Target 70 includes construction of two, 55,000 metric tons/year anaerobic digestion plants to process residential source separated organics (SSO). City Council says that the digester facilities, along with adoption of single stream recycling and a pay-as-you-throw funding system, will ...


    By BioCycle Magazine

  • Nutrient solubilization and its availability following anaerobic digestion

    This study aims to investigate solubilization of elements (P, N, K, Ca and Mg) during anaerobic digestion (AD) of solid agriculture waste. It is important to maintain particularly phosphorous in the aqueous phase to be able to subsequently recover it in a concentrated form via crystallization. Batch AD was carried out at a mesophilic condition (37 °C) and pH 7.0 ± 0.2 on a variety ...


    By IWA Publishing

  • Algae biomass cultivation in nitrogen rich biogas digestate

    Because microalgae are known for quick biomass growth and nutrient uptake, there has been much interest in their use in research on wastewater treatment methods. While many studies have concentrated on the algal treatment of wastewaters with low to medium ammonium concentrations, there are several liquid waste streams with high ammonium concentrations that microalgae could potentially treat. ...


    By IWA Publishing

  • Prediction of Strutive Formation Potential in EBPR Digested Sludges

    ABSTRACTLow operating costs and less sludge generation associated with EBPR (Enhanced Biological Phosphorus Removal) have led existing wastewater treatment plants to retrofit their phosphorus removal systems and have encouraged new plants to incorporate EBPR into their design. However, in plants that use anaerobic digestion, the introduction of EBPR may result in the formation of scales of the ...

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