The operation and management of continuous stirring tank reactor for treatment of sewage sludge with daily preliminary assessments and H₂S/SO₄²⁻ detection

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The operation and management of continuous stirring tank reactor for treatment of sewage sludge with daily preliminary assessments and H₂S/SO₄²⁻ detection

 

Author: Liu, Siyan
Title: The operation and management of continuous stirring tank reactor for treatment of sewage sludge with daily preliminary assessments and H₂S/SO₄²⁻ detection
Degree: M.Sc.
Year: 2015
Subject: Sewage -- Purification -- Anaerobic treatment.
Chemical reactors.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Civil and Environmental Engineering
Pages: 1 online resource (ix, 37 pages) : illustrations
ix, 37 pages : illustrations
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2818318
URI: http://theses.lib.polyu.edu.hk/handle/200/8064
Abstract: Anaerobic digestion is a bio-chemical process that is commonly used to concert macromolecule organic compounds (wastes) into a useful biogas with methane as the energy carriers. Increasingly, AD is being applied in industrial, agricultural, and municipal waste (water) treatment facilities. The use of AD technology allows plant operation to reduce waste disposal costs and offset energy utility expenses. In addition to treating organic wastes, energy crops are being transferred into methane as the energy carrier. As the application of AD technology broadens for the treatment of new substrates and co-substrate mixtures, so does the demand for a reliable testing methodology at the pilot-and laboratory-scale. Continuous Stirring Tank Reactor (CSTR), as one of the common configurations of anaerobic digestion systems, is frequently applied in research due to simplicity of design, operation and maintenance itself, and its advantages for experimentation as well. CSTR would provide as much system parameters as temperature, mixing, chemical components, and substrate concentration comparing to other prototypes. Therefore, we designed and constructed two exact same CSTRs for disposing two different types of sewage sludge for most preliminary analysis. Despite of daily preliminary assessments, it is worth noting that the sewage sludge as substrates coming from two different sewage treatment plants, ST sludge contains high concentration of sulfur, and we would like to study the changing of H₂S/SO₄²⁻ in our CSTR system for the reason that sulfur and sulfate would certainly cause impacts to anaerobic digestion system.

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