摘要设计总说明：水是生命之源，我国的地域广大，资源也相当的丰富。水真的足够了吗?我国人均水资源仅占世界人均水资源的四分之一。沿海地区与内陆地区的水资源占有量也是相当的不平衡。再加上近年来热度非常高的污染问题，我们人民可用的、安全的水其实是很少的。以上是大环境，本次设计是针对小城镇生活污水水质，提出整套污水处理工艺流程。就小城镇而言，从建国到改革开放到现在的城市化建设，越来越多的农村人口向城镇集中，这样的人口流动推动了城镇经济建设的发展，也加剧了城镇水质的污染。本次研究是对于小城镇，那就要设计出一套适合小城镇的污水处理工艺设计，使城镇中的人们用上干净卫生、安全放心的水，保证居民用水以及将污水处理到符合国家的标准要求。本设计的主要任务是通过查询整理相关资料，熟悉污水处理设计的一般规范，认识生活污水处理的常用工艺，针对小城镇生活污水水质，提出整套污水处理工艺流程，并进行工艺系统及关键构筑物设计，撰写设计说明，绘出污水处理厂总平面图、流程图及关键构筑物图。本次污水处理构筑物工艺设计的设计日水量为45000立方米。研究各种工艺技术及对比各工艺之间的优缺点后，选用A/O工艺技术，其特点是工艺简单、建造和运行费用低、沉淀效果好等。对于小城镇建设来说较为适合。68703

毕业论文关键词： 生活污水处理；污水厂污水处理构筑物；A/O工艺

Wastewater treatment structure design

Abstract：Water is the source of life, and our country is vast and rich in resources. Is water really enough? Our country is only a quarter of the world's water per capita.The water resources of coastal regions and inland areas are also quite uneven. In addition to the very high temperature of pollution in recent years, the available and safe water for our people is very small. Above is the environment, this design is to target small town life sewage water quality, put forward complete sewage treatment process flow. In terms of small cities and towns, from the founding to the reform and opening up to the present urbanization, more and more rural population to urban concentration, so the population movement promoted the development of the urban economic development, also contributed to the town of water quality pollution. This study is to small towns, that is about to design a set of suitable for small towns sewage treatment process design, make the town people use clean, safe water, ensure that water and sewage treatment to conform to the national standard requirements.This design is the main task of the related data by query processing, familiar with the general specification of sewage treatment design, know the common sewage treatment technology, in view of the small towns sewage water quality, puts forward a complete set of sewage treatment process, and process system and key structure design, write design specification, draw the sewage treatment plant site plan, flow chart and key structure diagram.The design of wastewater treatment structure design is 45000 cubic meters. Study the advantages and disadvantages of various technology and comparison between various process, selection of A/O technology, characterized by simple process, low construction and operating cost, good effect of precipitation, etc. It is suitable for small town construction.

Keywords:  sewage treatment; Sewage treatment structures; A/O process

目  录

引言 7

1  设计概述 7

1.1 设计依据及设计任务 7

1.2 污水处理厂的概述 7

1.3 设计人口的确定