Digestate Articles

  • Anaerobic Digestion Reduces Microplastics in Sludge

    Anaerobic digestion can help remove microplastics — a large cause of water pollution — during the sewage treatment process Microplastics, or tiny fragments of plastic, include microbeads, the plastic pellets present in thousands of household and personal care products, including toothpaste, cosmetics, and beauty scrubs. They also include fragments from the breakdown of anything in our ...


    By Fluence Corporation

  • Recovery of nutrients from digested sludge as struvite with a combination process of acid hydrolysis and Donnan dialysis

    In this study, the effects of the combination of acid hydrolysis and Donnan dialysis on the high-quality struvite production from digested sewage sludge were examined. The Box–Behnken design was applied in the hydrolysis using oxalic acid for the optimization of the conditions that affect the nutrients and metal release from digested sludge. An optimal condition was obtained at oxalic acid 0.5 ...


    By IWA Publishing

  • Anaerobic Digest

    Washington, DC: NOSB Considers Digestate Use Petition The National Organic Standards Board (NOSB) of the U.S. Department of Agriculture (USDA) has agreed to consider a petition from Cenergy USA, the makers of Magic Dirt™, to allow use of digestate from anaerobic digestion plants in organic agriculture. Magic Dirt is made from digested dairy manure fibers. The soil amendment products ...


    By BioCycle Magazine

  • Methods of ammonia removal in anaerobic digestion: a review

    The anaerobic digestion of substrates with high ammonia content has always been a bottleneck in the methanisation process of biomasses. Since microbial communities in anaerobic digesters are sensitive to free ammonia at certain conditions, the digestion of nitrogen-rich substrates such as livestock wastes may result in inhibition/toxicity eventually leading to process failures, unless ...


    By IWA Publishing

  • Recycling Energie AG (CHE) Disposal Company - Case Study

    Digester:  2x 2.000 m³ Post digester: 2 x 2.600 m³ Gas storage: 2 x 930 m³ Input substrates: manure, grass cuts, food waste Scope of services:  concept creation, consulting, detail engineering, delivery of equipment, general project supervision, start-up, operational support and service Start-up: ...

  • Landfrisch Molkerei (AUT) Disposal Company - Case Study

    Winner of the "Energy Globe Austria" 2006 Awards Digester: 1.200 m³ Gas storage: 500 m³ Input substrates: whey, wastewater Scope of services:  concept creation, consulting, detail engineering, delivery of equipment, general project supervision, start-up, operational support and service Start-up: ...

  • CS Bioenergia (BRA) Disposal Company - Case Study

    Digester: 2 x 5.000 m³ Post Digester: 3.400 m³ Gas storage: 3.250 m³ Input substrates: primary and secundary sludge, food waste Scope of services:  concept creation, consulting, detail engineering, delivery of equipment, general project supervision, start-up, operational support and service Estimatet completion date: ...

  • 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: ...

  • SIF Oregon (USA) Disposal Company - Case Study

    Digester: 2 x 3.500 m³ (hydraulic digester) Post digester: 3.000 m³ Gas storage: 1.800 m³ Input substrates: vegetable waste,potatoes, pumpkin, maize waste Scope of services:  concept creation, consulting, detail engineering, delivery of equipment, general project supervision, start-up, operational support and service Start-up: ...

  • ERC (DEU) Disposal Company - Case Study

    Digester: 650 m³ (hydraulic digester) Gas storage: 280 m³ Input substrates: food waste Scope of services:  concept creation, consulting, detail engineering, delivery of equipment, general project supervision, start-up, operational support and service Start-up: 1996 / reconstruction ...

  • Jakob Bösch AG (CHE) Disposal Company - Case Study

    Digester: 3 x 1.650 m³ Post digester: 990 m³ Gas storage: 2.100 m³ Input substrates: manure, food waste, slaughterhouse waste Scope of services:  concept creation, consulting, detail engineering, delivery of equipment, general project supervision, start-up, operational support and service Start-up: ...

  • Implementation of the anaerobic digestion model (ADM1) in the PHREEQC chemistry engine

    Anaerobic digestion is state-of-the-art technology to treat sludge and effluents from various industries. Modelling and optimisation of digestion operations can be advantageously performed using the anaerobic digestion model (ADM1) from the International Water Association. The ADM1, however, lacks a proper physico-chemical framework, which makes it difficult to consider wastewater of complex ...


    By IWA Publishing

  • Experimental power of laboratory-scale results and transferability to full-scale anaerobic digestion

    Anaerobic digestion is today internationally acknowledged as an environmentally sound process for energy and nutrient recovery from organic wastes, and it is the dominant sludge treatment technology in most countries’ wastewater treatment plants. Laboratory- or pilot-scale experiments are commonly used as a first step to investigate the potential of new ideas or to confirm research hypothesis ...


    By IWA Publishing

  • Removal of inorganics from sludge and digestate: the BiAR process

    This conference contribution will present a novel technology for renewable ash-free fuel production from low-value ash-containing feedstocks such as sludge digestate, wood bark or rice husks that cannot be utilized directly as a heating fuel, because of the high (low melting point) ash content. Biomass Ash Removal (BiAR) process introduces the low-temperature solvolysis in cheap solvents to ...


    By IWA Publishing

  • DigestivorePAD™ Technology

    Ovivo has recently signed an exclusive licensing arrangement with DC Water to promote and distribute their patented post aerobic digestion technology.  Branded under the name DigestivorePAD™, the system provides owners with increased solids destruction, reduced nutrients in sidestreams and improved cake solids from their dewatering equipment.  The technology will build on ...

  • Thermophilic digestion revisited

    On the 28th of October Colsen presented their practical experience in the field of anaerobic sludge digestion at the Ghent symposium Valorization of organic resources from wastewater. At the symposium various speakers presented its view or experience on the topic of valorization of organic resources from wastewater. Numerous examples are being developed by companies and universities ...


    By Colsen International b.v.

  • Membranes in the Fast Lane – QUA CeraQ Featured in Water and Wastes Digest (W&WD)

    Membranes in the Fast Lane – Ceramic membranes provide solution for auto parts manufacturing process Our CeraQ™ Ceramic Membrane was recently featured in Water and Wastes Digest (W&WD)’s September 2016 Issue. In this ...


    By QUA Group LLC

  • Anaerobic digestion of sludge differing in inorganic solids content: performance comparison and the effect of inorganic suspended solids content on degradation

    High inorganic suspended solids (ISS) content of sludge in many areas (especially with combined sewage systems) results in low VS/TS (volatile solids, VS; total solids, TS) levels and raises concerns about its effect on anaerobic digestion. The performances of sludge anaerobic digestion with different feeding VS/TS levels as well as the effect of ISS content on the anaerobic degradation ...


    By IWA Publishing

  • Assembly of Methan-Digesters in Benesov - Case Study

    After only a short erection time of 3 month the heart of the plant, the two digester are completed. With a diameter of 9 m and a height of 18 m and their appearance is an indication for the total size of the plant. The erection is affected as all projects of GLS Tanks International GmbH by international cooperation. Our erection crew installed both digesters together with Czech helpers in record ...


    By GLS Tanks International GmbH

  • 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

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