毕业设计说明书
毕 业 设 计 题 目 辽宁省PLB市城市污水处理厂设计
系 专业班级 市政与环境工程系 给水排水工程10-2班
学 生 姓 名 性别 男
指 导 教 师 职称 教授
摘要
本次设计的题目为辽宁省PLB市城市污水处理厂设计。主要任务是完成该污水处理厂的平面布置、各个构筑物的初步设计和一些处理构筑物施工图的设计。
初步设计要完成设计说明书一份、污水处理厂平面布置图一张、污水处理厂工艺平面图一张、污水提升泵站工艺图一张、污水处理工艺与污泥处理工艺高程布置图一张以及主要处理构筑物设计图四张；在主要构筑物设计图的设计中，主要是完成曝气池、初沉池、浓缩池的设计。
该污水处理厂工程，规模为11.1万立方米/天。进水水质为SS=290mg/L;BOD5=220mg/L。
本次设计所选择的的传统活性污泥处理工艺，能够较好的满足污水水量、水质及变化规律，以及对出水水质和对污泥的处理要求。该污水厂的污水处理流程为：污水从粗格栅到污水提升泵房，再从泵房到细格栅，然后到曝气沉砂池，再进入辐流式初沉池，然后到鼓风曝气池，再从鼓风曝气池到辐流式二沉池，污水再经过接触消毒池后排入自然水体；污泥处理流程为：曝气沉砂池产生的垃圾直接外运处置，二沉池产生的剩余污泥则运入贮泥池，二沉池的回流污泥则通过管道、污泥回流泵房进入污泥浓缩池，经过一级、二级消化后的污泥进入污泥浓缩脱水车间，最后外运处理。污水处理厂处理后的出水水质为：SS≤20mg/L;BOD5≤20mg/L。
关键词：传统活性污泥处理工艺；污水处理；污泥处理
Abstract
The topic of this design for PLB city in Liaoning province city sewage treatment plant design. The main task is to design construction plans to complete the preliminary design layout, all the sewage treatment plant construction and some processing architecture.
Preliminary design must complete the design instruction booklet, factory layout of a sewage treatment plant, the process plan of a sewage pumping station, process chart, the sewage treatment process and the sludge treatment process elevation layout a map as well as the main treatment structures design four sewage treatment; in the design of the main building design in the main, is completed the design of aeration tank, primary sedimentation tank, concentrated pool.
The sewage treatment plant project, size is 11.1 cubic meters/day. Feed water quality for SS = 290 mg/L; BOD5 = 220 mg/L. Water quality: SS=290mg/L; BOD5=220mg/L.
This design choice of traditional activated sludge treatment process can satisfy the sewage water, water quality and changes, and the requirement of effluent quality and sludge treatment. The wastewater treatment plant sewage treatment process: the sewage from the coarse grid to the sewage pumping station, and then from the pumping station to the grid, and then to the aerated grit tank, then enters the radial flow settling tank, then to the aeration tank, the aeration tank to the radial flow two sedimentation tank, sewage after. Touch pool disinfection discharged into natural water; sludge treatment process for: waste disposal of Sinatra’s aerated grit tank, sludge produced two sedimentation tank is transported into the mud storage tank, sludge return two sedimentation tank, sludge reflux pump through the pipeline into the sludge thickening tank, through a level, two level after digestion sludge into sludge dewatering workshop, finally outward processing. The effluent treatment plant treated sewage is: SS = 20mg/L; BOD5 = 20mg/L.
Key words：Conventional activated sludge treatment process; sewage treatment; sludge treatment
目 录
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