文档介绍：目录
第一章概述 1
设计题目 1
原始资料 1
第二章设计规模及处理程度 5
处理要求 5
设计流量 6
处理程度 7
第三章工艺流程确定 7
污水处理工艺的选择 7
说明 8
第四章设计计算 10
处理构筑物形式选择 11
分流井 9
粗格栅室 9
污水提升泵房 11
细格栅 12 平流式沉砂池 13
16
曝气池 18
23
27
27
厌氧消化池 29 污泥机械脱水 31
46
52
《水质工程学Ⅱ》课程设计
城市污水处理厂工艺设计
摘要
为促进国民经济发展,改善城市环境,某市政府决定兴建污水处理厂。
该城市的主导风向为西北,℃,在城市的北侧西向东有一条纳污河流,根据该城市的整体规划污水厂拟建在该城市下游河岸边,地势平坦。
该污水处理厂的设计和建设分两期,近期的城市设计人口为222000人,设计排水量标准为190L/人·天;远期发展人口270000人,排水量标准210L/人·天。该城市的工业企业的污废水全部经过厂内污废水处理站处理后,排入城市排水管网。
根据该城市污水处理要求(COD≤80mg/L,BOD≤20mg/L,SS≤20mg/L),该污水处理厂采用传统工艺进行污水处理,传统工艺技术成熟,处理效果好,但氮磷的去除率较低,污水处理中产生的污泥要进行稳定化处理,脱水后泥饼外运填埋或作为农肥。处理后的污水直接排放到纳污河流。
关键词:污水;处理;传统工艺;
类型:课程设计。
Comparative study on the characteristics of fluidized-pellet-bed bioreactor mon wastewater treatment process
ABSTRACT
In order to help the national economy to develop ,environment in the improvement city,the some city hall decides to build wastewater treatment factory.
The predominant direction of wind of the city is a northwest,the year is average the air temperature is ℃,have a rive to the east from the west at the northern side of city,draw up to set up in the downstram river near the bank in city according to the whole programming sewage factory of the city ,geographyflat.
Design and construction of the wastewater treatment’s fatory divide two,the city in the near future design the population as 222000 people,design displacement standard is 190L/person·day;The long-term development populationg is 270000 people,displacement standard 210L/person· of the dirty wastewater of the industrial business enterprise of the city after the dirty liquid waste processing station in the fatory after the processing,row go into drain in the city.
Accoding to the city’s wastewater treatment request(COD≤80mg/L,BOD≤20mg/L,SS≤20mg/L),the wastrwater treatment’s factory adopts a trad