污水处理厂毕业设计--污水处理厂工艺设计

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1、 - i - 摘摘 要要 本设计为武汉市第八污水处理厂工艺设计。 该设计的生活污水流量为：150000 m3 /d，进水水质为：BOD5 =250mg/l， COD=550mg/l，SS=260mg/l。处理后要求达到的水质标准为：BOD5 =20mg/l， COD=80mg/l，SS=20mg/l。设计内容主要包括两大部分，即污水处理部分；污泥处理部 分。设计的核心工艺为 AB 法，经过处理的污水完全可以达到需要的处理程度。 通过比较选择确定 AB 法为最佳工艺。选定工艺流程后，按照工艺流程的顺序进行 构筑物的设计计算，在完成污水和污泥处理构筑物的设计计算后,根据平面布置的原则, 综合考虑各

2、方面因素进行了污水厂的平面布置。 据污水的流量对连接各构筑物的管渠进 行了选径、确定流速以及水力坡降,然后进行了水力损失计算。据水力损失计算对污水 和污泥高程进行了计算和布置。最后完成了对平面图、高程图及各种主要的构筑物图的 绘制。 污泥处理中、沉淀池剩余污泥则经重力自流至重力浓缩池。以降低污泥的含水率， 减小污泥体积。泥经浓缩后,含水率尚还大,体积仍很大。为了综合利用和最终处置,需对 污泥进行干化和脱水处理。 关键词：关键词：ABAB 法、污水处理法、污水处理 - ii - ABSTRACT This is a design about the sewage treatment plant

3、of wuhan city. The flow of sanitary sewage that should be designed is: 150000 m3 / d, Inflow water quality: BOD5=250mg/l, COD=550mg/l, SS=260mg/l. The standard quality of water treated is: BOD5=20mg/l, COD=80mg/l, SS=20mg/l. Design content mainly includes two parts: the sewage disposal part, Sludge

4、treatment. The centre technology of the design method is Adsorption Biodegradation. By comparing the choice AB method for the optimum process is determined. After selected process flow, in accordance with the order of the process flow for structure design and calculation, in finishing the design and

5、 calculation of sewage and sludge treatment structures, based on the principle of plane layout, comprehensive consider all aspects of factors in the sewage plant layout. According to the sewage flow tube drainage of connecting the structures of the diameter, velocity and hydraulic gradient, for sure

6、, and then the hydraulic loss calculation. According to the hydraulic loss calculation of sewage and sludge elevation calculation and layout. Finally completed the plan, elevation drawing and all kinds of the main structures of drawing. In the sludge treatment, residual sludge sedimentation tank by gravity artesian to gravity concentration pool. To reduce the moisture content of sludge, reduce sludge volume. Mud after enrichment, the moisture content is also big, the volume is still very big.