兰州大学机构库 >资源环境学院
某城市生活污水处理厂工艺设计
Alternative TitleThe Design of the Sewage Treatent Process in a City
刘冀元
Thesis Advisor姜云超
2017-05-09
Degree Grantor兰州大学
Place of Conferral兰州
Degree Name学士
Keyword污水处理 A2/O工艺 脱氮除磷 达标排放
Abstract

生活污水中的主要污染物为有机物、氮和磷等物质。生活污水的特征为浑浊、水质稳定,色深且具有异味,还有大量微生物。随着国民经济和生活水平的不断提高,污水处理的发展在我国发展战略目标中会占有越来越大的部分。根据污水厂的规模,并结合考虑需脱氮除磷的要求,城市污水处理厂设计采用A2/O工艺。该工艺污水处理流程为:粗格栅→泵房→细格栅→沉砂池→A2/0池→二沉池→接触池→出水排放。通过此工艺的处理,污水中SS、CODcr、BOD、TN、NH4-N、TP的去除率达到95%、88.9%、95%、66.7%、83.3%、83.3%,出水水质将达到《城镇污水处理厂污染物排放标准》(GB18918-2002)中的一级A标准,CODcr≤50mg/L,BOD≤10mg/L,SS≤10mg/L,TN≤15mg/L, NH4-N≤5mg/L,TP≤0.5mg/L。

Other Abstract

The main pollutants in domestic sewage are organic matter, nitrogen and phosphorus and other substances. Domestic sewage is characterized by turbidity,water quality and stability,color depth and smell,there are a large number of micro-organisms.With the continuous improvement of the national economy and living standards,the development of sewage treatment in China's development strategy will occupy an increasingly large part of the target.According to the size of the sewage plant,combined with the need to consider the requirements of nitrogen and phosphorus removal,urban sewage treatment plant design using A2/O process.The process of sewage treatment process:coarse grille→ pump→fine grille→grit chamber→A2/0pool→secondary sink pool→contact pool→ water discharge through this process,sewage SS,CODcr,BOD,TN,NH4-N,TP removal rate reached 95%, 88.9%, 95%, 66.7%, 83.3%, 83.3%,effluent quality will reach "urban sewage treatment plant pollutant discharge standards" (GB18918-2002) Grade A standard,CODcr≤50mg/L,BOD≤10mg/L, SS≤10mg/L, TN≤15mg /L,NH4-N≤5mg/L,TP≤0.5mg/L.

URL查看原文
Language中文
Document Type学位论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/240199
Collection资源环境学院
Recommended Citation
GB/T 7714
刘冀元. 某城市生活污水处理厂工艺设计[D]. 兰州. 兰州大学,2017.
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