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The Characteristics of Sewage Sludge and Investigation of Feasibility for Sintering Ceramic Agitator

Author: CaoYanSheng
Tutor: WengHuanXin
School: Zhejiang University
Course: Environmental Science
Keywords: Sludge Treatment and Disposal Granulation Sludge ash ceramsite
CLC: X703
Type: Master's thesis
Year: 2008
Downloads: 332
Quote: 6
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Abstract


One of the consequences of urban development is the increase in urban sewage emissions. In order to deal with the increasing urban sewage, the expansion of the city sewage treatment plant or the construction of a new municipal sewage treatment plant is particularly necessary. Solidarity with sludge production also increased with the increase in the amount of sewage treatment, sludge treatment and disposal is particularly urgent. Has been the traditional sludge treatment process, including the following: concentrated sludge, sludge digestion, sludge dewatering and sludge drying and incineration. As for the final disposal of residual solid material in the sludge treatment process include the following: to throw themselves into the sea, landfills and land use. The several sludge disposal process with different features, but their disadvantages but also obvious. Therefore, at this stage of the research hotspots focus on the use of sludge (sludge ash) firing ceramsite uses. The purpose of this study is to discuss the possibility and feasibility of the use of sewage sludge ash firing sludge ash ceramsite. Through the temperature of 600 ℃ under laboratory conditions continued 1h roasted the residues - sludge ash detection analysis of the physical and chemical properties and microstructure of the project, pointed out that the use of sewage sludge ash firing sludge ash ceramsite possibility of the following assumptions: For similar to silica - alumina - magnesia ternary system, its chemical composition in the eutectic melting point (temperature of 1361 ° C when the melting point of the eutectic) corresponding to the region of the sludge ash both may be provided in a relatively low temperature firing sludge ash ceramisite. Self-designed on the basis of the columnar granulator by dry - pressure forming the sludge ash raw material pellets prepared (fresh sewage sludge ash pellet) in a maximum temperature of 1100 ° C under the conditions of continuous calcination 60min System into sludge ash haydite. Then measured its strength (compressivestrength), the apparent density (apparent density), the 1H water absorption and specific surface area, to confirm sludge ash ceramisite has superior properties of a ceramic material, noting that the use of sludge ash firing sludge ash feasibility of Ceramisite. The above measured sludge ash Ceramisite of performance parameters, and pointed out that the scope of application of this study, prepared sludge ash Ceramisite in addition to apply to the preparation of a variety of building wall materials, load-bearing structural materials, but also used as environmental engineering.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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