sludge digestion Articles
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Brno (CZE) Municipal Plants - Case Study
Digester: 4 x 4.000 m³ sewage sludge digestion Scope of services: sewage sludge digester agitators, gas equipment, desulphurization Start-up: ...
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Schladming (AUT) Municipal Plants - Case Study
Digester: 2 x 600 m³ sewage sludge digestion Scope of services: sewage sludge digester agitator, gas storage, gas equipment, heat exchanger Start-up: ...
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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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Kranj (SLO) Municipal Plants - Case Study
Digester: 5.000 m³ sewage sludge digestion Scope of services: sewage sludge digester agitator, flare, gas equipment, gas storage, desulphurization Start-up: ...
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Wastewater Process Optimization - Case Study
Including Utilization of Biological Supplements of Microorganisms and Co-Factor Enzymes. This presentation will describe two applications utilizing the MicroMix biological supplement to improve treatment system performance. Bakery Upgrade - this application included optimization of the treatment system and aerobic sludge digester Municipal Sludge Digestion - application was to test the ...
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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 and several ...
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Relative kinetics of anaerobic digestion under thermophilic and mesophilic conditions
With several advantages over the conventional mesophilic anaerobic digestion, such as better sludge quality and higher biogas production, thermophilic anaerobic digestion is regarded as a promising alternative for sludge digestion. Primary and activated sludges are complex materials, and historically, analysis of kinetics has been largely on whole sludge, without analysis of individual ...
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Improving products of anaerobic sludge digestion by microaeration
Biogas, digested sludge and sludge liquor are the main products of anaerobic sludge digestion. Each of the products is influenced significantly by specific conditions of the digestion process. Therefore, any upgrade of the digestion technology must be considered with regard to quality changes in all products. Microaeration is one of the methods used for the improvement of biogas quality. ...
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Effect of trace metals on halophilic and mixed cultures in anaerobic treatment
Abstract: Trace metals are known to stimulate the activity of anaerobic methanogenic bacteria involved in the degradation of organic matter. The objective of this research was to investigate the effect of three trace metals, iron, nickel and cobalt on the activity of halophilic methanogens, digester sludge and a mixed culture of halophilic bacteria and digester sludge, at various salt ...
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ISAM Sequencing batch reactor for 30,000 Gallons per day - Case study
The government of the Cayman Islands centralized their offices in one large building. The occupancy of this new building will be nearly 1000 employees. As the building was not located close to a sewer network, it required its own treatment plant. H2FLOW EQUIPMENT INC. supplied an ISAM SBR system designed to provide the performance required. The system features an integral sludge ...
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Floating Cover-China - Case Study
" We have Thermophilic digested biological sludge, digested at 55 degrees. This is done in the digester, from which the sludge is fed to a open storage tank. Subsequently the sludge is dewatered, and the water from the dewatering is led to an "Anita Mox' process. This process should preferably stay above 18" degrees, so it is important that the temperature does not drop too low in the storage ...
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Effect of the addition of rice straw on microbial community in a sewage sludge digester
Rice straw was added to a sewage sludge digester and its effects on methane production, dewatering characteristics, and microbial communities in the digested sludge were examined by a continuous digestion experiment under mesophilic conditions (35 °C). Stable gas generation was monitored in all digestion experiments. Methane yield from raw sludge, chopped rice straw and softened rice ...
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The energy factory - producing energy, nutrients and clean water from sewage water
Conventional sewage treatment: Sludge line: 20 kg DM IE year to sludge; 1.500.000 tons sludge per year Sludge treatment and disposal: 40% of STP opex average cost € 330 / ton sludge (incl. dewatering and processing costs) Traditional (mesophilic ) sludge digestion: Prim. sludge / sec. sludge = 50 : 50 Hydraulic Retention Time 20 days Average yield: 25 – 40% ...
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Manitou Drive Biosolids Drying Facility – Application Profile - Case Study
About the Project The WWTP is a conventional activated sludge process with chemical phosphorus removal, anaerobic sludge digestion and sodium hypochlorite disinfection, and has a rated design capacity of 123 million litres/day (MLD). The treated effluent is discharged to the Grand ...
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Manitou Drive Biosolids Drying Facility - Case Study
About the Project The WWTP is a conventional activated sludge process with chemical phosphorus removal, anaerobic sludge digestion and sodium hypochlorite disinfection, and has a rated design capacity of 123 million litres/day (MLD). The treated effluent is discharged to the Grand ...
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Anaerobic digestion and thermal hydrolysis to reduce production of sludge in WWTPs
Abstract Mesophilic and thermophilic digestion of primary and activated sludge was investigated in lab scale reactors. Mixed primary and activated sludge was digested in one experiment and activated sludge was digested alone in another. The same gas yield, COD and dry solids reduction was obtained with both mesophilic and thermophilic digestion. However, more dissolved COD was found after ...
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Specific methanogenic activity of halophilic and mixed cultures in saline wastewater
ABSTRACT: Wastewater containing high concentrations of salt, are difficult to treat using biological treatment processes, especially anaerobic processes. Limited information is available on methanogenic activity in saline environments. The objective of this research was to investigate the activity of halophilic methanogens, digester sludge and a mixed culture of halophilic and methanogenic ...
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Revealing biogenic sulfuric acid corrosion in sludge digesters: detection of sulfur-oxidizing bacteria within full-scale digesters
Biogenic sulfuric acid corrosion (BSA) is a costly problem affecting both sewerage infrastructure and sludge handling facilities such as digesters. The aim of this study was to verify BSA in full-scale digesters by identifying the microorganisms involved in the concrete corrosion process, that is, sulfate-reducing (SRB) and sulfur-oxidizing bacteria (SOB). To investigate the SRB and SOB ...
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Microwave and its combined processes: an effective way for enhancing anaerobic digestion and dewaterability of sewage sludge?
The enhancement for sludge anaerobic digestion and dewaterability were investigated in sludge pretreated by microwave (MW) and its combined processes. The results showed that microwave and its combined processes can efficiently release soluble organic matter and thus enhance anaerobic digestion of sludge. The cumulative methane production in the test of the MW-H2O2-OH (0.2) process was ...
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