文档介绍：毕业设计相关材料
题目:
城市污水处理厂初步设计(完全混合流态生物工艺)
院(系):
化工与环境工程学院
专业:
环境工程
学生:
班级:
环境07-1
毕业设计相关材料清单
序号
材料名称
份数
1
毕业设计选题表
1
2
毕业设计开题报告
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3
毕业设计外文资料翻译
1
4
毕业设计小组答辩记录
1
5
毕业设计成绩考核表
1
摘要
当今,随着经济的快速发展,人民生活水平的不断提高,环境污染日趋严重,加大城市生活污水治理力度势在必行。
现拟建一座城市生活污水处理厂,处理规模为100000m3/d。进水水质为CODCr :250mg/L,BOD5 :150mg/L,SS:200mg/L, NH3-N:40mg/L,NO3-N:10mg/L, pH=~,出水水质为CODCr ≤100mg/L,BOD5≤30mg/L,SS≤30mg/L, NH3-N ≤25mg/L,pH=6~9。根据进出水水质,本设计拟采用完全混合液态的生物工艺,经比选,确定采用周期循环曝气活性污泥(CASS)工艺。CASS工艺污水呈完全混合液态,对进水水质、水量、PH和有毒有害物质起到较好的缓冲作用,具有较强的耐冲击负荷能力,同时对丝状菌的生长起到抑制作用,可有效防止污泥膨胀。此工艺具有投资省,处理效果好,运行管理方便等优点,适用于大中型污水处理厂使用。本设计包含污水处理工艺流程的确定,工艺流程中各单元的计算,图纸的绘制等。本工程的实施将显著改善受纳水体水质,同时间接产生经济效益,促进经济可持续发展。
关键词:污水处理厂;完全混合;CASS工艺
Abstract
Nowadays, with rapid economic development, improve living standards, environmental pollution is worsening, and increase efforts to municipal sewage treatment is imperative.
Now proposed a city sewage treatment plant for treating scale 100000m3 / d. The ram water quality is CODCr, BOD5, SS, NH3-N, NO3-N,and pH keep at 250mg / L,150mg / L,200mg / L,40mg / L,10mg / L, and ~ , treated water quality is CODCr, BOD5, SS, NH3-N, NO3-N,and pH keep at 100mg / L, 30mg / L, 30mg / L, 25mg / L,ant pH 6 ~ 9, respectively. According to the treated water quality, the design plans to use
pletely mixed biotechnology, parison, determine to use of cyclic activated sludge system (CASS) process. sawage of CASS process pletely mixed, on water quality, water quantity, PH, toxic and hazardous substances have buffer role effect, with a strong resistance to shock loading capacity, meanwhile growth of filamentous bacteria is be inhibition to be prevent sludge bulking. This process has the advantage of good Less investment, good effect, easy operation and management .朗读
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Applicable to large or medium sized sewage treatment plants. The design includes the determination of sewage treatment process, process in the calculation of each unit and drawin