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Showing 1 to 20 of 121 for “"Sewage sludge"”.
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Rheological examination of domestic sewage sludge
… parameters involved in the transportation of sludge from the place of origin to the place of disposal has long been a problem to the sanitary engineer. To obtain the greatest efficiency in the design of pumps and pipelines the properties of sludge need to be thoroughly understood. This …
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Bioenergy Recovery from Bulk Greenhouse Waste and Raw Sewage Sludge
… for greenhouse crop wastes (GCW) and raw sludge (RS). A batch setup is constructed using the AMPTS II unit to allow the AD to take place at mesophilic conditions. The co-digestion of GCW with RS is first investigated and the methane yield is compared for different mixing ratios. Results …
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Improving Anaerobic Digestion of Sewage Sludge Using Free Ammonia Pretreatment
A massive amount of sewage sludge is produced in the primary sedimentation (primary sludge) and wastewater treatment process (secondary sludge) in wastewater treatment plants (WWTPs) adding a heavy economic burden for WWTPs for their disposals. Anaerobic digestion (AD) for sewage sludge treatment …
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Hydrothermal treatment of sewage sludge under oxidative and nonoxidative conditions
… (thermal hydrolysis) to stabilize activated sludge has been studied. Specifically, the purpose of this work was to analyse the effect of these treatments on the chemical, biological and rheological properties of sludge, in order to investigate in more depth the reactions involved in this …
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Anaerobic co-digestion of municipal solid waste and sewage sludge.
… of anaerobic processes is the co-digestion of sewage sludge and the organic fraction of municipal solid waste (OFMSW). The purpose of this study is to evaluate the technical feasibility of this process in the context of typical Canadian solid waste. Lab-scale experiments were initially …
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Conventional and Advanced Thermal Hydrolysis in Sewage Sludge Pre-treatment
… holds promise as a technology for pre-treating sludge before anaerobic digestion (AD) to enhance biogas production. Operating at elevated temperatures, THP also offers sludge disinfection for safe utilisation as fertiliser and improves sludge dewaterability. However, the requirement for high …
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Dried Activated Sewage Sludge as a Nitrogen Source for Ruminants
Made available in DSpace on 2014-12-05T17:47:36Z (GMT). No. of bitstreams: 1 5900518.pdf: 3978655 bytes, checksum: 0218553aa4e1502e868115a9c1d51fe7 (MD5) Previous issue date: 1958
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A Comparative Study of Anaerobic Digestion Processes for Sewage Sludge
… levels. At this point, samples of digested waste sludge were analyzed for residual biological activity, dewatering properties and headspace organo-sulfur production. Results from the study demonstrated that the TPAD digestion process had the lowest residual biological activity (RBA) after …
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The dual digestion of sewage sludge using air and pure oxygen
… detail in the second phase as far as the final sludge product is concerned. In phase I, with air, it was possible to maintain thermophilic temperatures in the aerobic reactor throughout the year. However, the required retention times were relatively long (3-6 days) in comparison with the pure …
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Optimization of anaerobic co-digestion of sewage sludge using bio-chemical substrates
Submitted in fulfillment of the requirements of the degree of Masters of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2018.
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Studies of microplastics present in sewage sludge, effects on amended agricultural soils
… a scoop of MPs extraction in dry-weighed sludge samples. Given a variety of protocols, differing retention times and digestion efficacy have been compared, using the principle of density separation followed by filtration with size fractioning, the results in each protocol have been …
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Viability and Infectivity of Parasitic Nematode Ova in Anaerobically Digested Sewage Sludge
Made available in DSpace on 2014-12-14T13:28:19Z (GMT). No. of bitstreams: 1 7915315.pdf: 3385284 bytes, checksum: 6bc8b0a3e1813e864aef87794020cfce (MD5) Previous issue date: 1979
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Removal of Organic Micro-Pollutants from Water Using Sewage Sludge Based Composite Adsorbents
<p>Millions of tons of sewage sludge, waste oil sludge and fish waste are produced annually, and improper treatment/disposal of these wastes have resulted in numerous environmental issues. On the other hand, these wastes are rich in organic materials, metals, and inorganic minerals and could be …
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Stability Constants of Metal-Polyelectrolyte Complexes Occurring Naturally in Soils and Sewage Sludge
Made available in DSpace on 2014-12-12T00:17:44Z (GMT). No. of bitstreams: 1 7121236.pdf: 3548314 bytes, checksum: b786ff2e0a3a55947627400cf90c48f6 (MD5) Previous issue date: 1971
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The effect of sewage sludge co-disposal and leachate recycling on refuse stabilization
In the past sanitary landfill sites for solid waste disposal were regarded simply as containment sites so that the waste contents were isolated from the population. Various degrees of effort were made to reduce the impact of the waste in and around the site - in some cases none in other cases …
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Effects of Anaerobically Digested Sewage Sludge on Organic Matter in Soil and Soil Water
Made available in DSpace on 2014-12-14T14:37:17Z (GMT). No. of bitstreams: 1 7624104.pdf: 3318972 bytes, checksum: d39d998d6d0186a01ed8e4894925b80c (MD5) Previous issue date: 1976
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Availability and distribution of heavy metals from sewage sludge in the plant-soil continuum
… vulgare L.) and corn (Zea mays L.) grown on four sludge-amended soils. These lysimeters were constructed in Acredale silt loam (Typic Ochraqualf), Bojac loamy sand (Typic Hapludult), Davidson clay loam (Rhodie Paleudult), and Groseclose silt loam (Typic Hapludult) soils. An aerobically digested …
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Effect of Addition of High Strength Food Wastes on Anaerobic Digestion of Sewage Sludge
Anaerobic co-digestion of municipal sludge and food wastes high in chemical oxygen demand (COD) has been an area of interest for waste water treatment facilities looking to increase methane production, and at the same time, dispose of the wastes and increase the revenue. However, addition of food …
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Forest vegetation response to the application of municipal sewage sludge in the coastal western hemlock zone
The disposal of municipal sewage sludge is a major waste management problem for large cities. The Greater Vancouver Regional District is investigating the option of applying sludge to forest lands as a fertilizer for enhanced timber production. A joint project of the University of British Columbia …
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Integrated biological, chemical and physical processes kinetic model for the anaerobic digestion of primary sewage sludge
… and control of anaerobic digesters treating sewage sludges still is largely based on experience, or empirical guidelines. To aid the design, operation and control of (and research into) anaerobic digestion, a mathematical model would be an invaluable process evaluation tool.
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