大自然的启示:如果让污水进入天然水体,可通过水体中微生态系 统的自净功能得到处理。 1882年就有人做向污水中鼓入空气的试验; 1912年美 Lawlence国的研究所进行污水曝气试验;英国的 Fowler 访问该研究所回国后,让Clark和Gage进行试验,发现,对污水 长时间曝气会产生一些絮状体,同时水质会得到明显的改善, ArdernLockett和继续对这一现象进行了研究,曝气试验是在瓶中 进行的,每天试验结束时把瓶子倒空,第二天重新开始,他们发现 由于瓶子清洗不完善,瓶壁附着一些棕褐色的絮状体时,处理效果 反而好

本标准规定了水处理设备的产品分类,设备的设计、制造、检验,性能试验方法以及标志、包装、运输、贮存等要求

6-1 Role of chemical Unit Processes In Wastewater Treatment The principal chemical unit processes used for wastewater treatment include(1)chemical coagulation, (2) chemical precipitation, (3)chemical disinfection, (4) chemical oxidation, (5)advanced oxidation processes, (6)ion exchange

Operations used for the treatment of wastewater in which change is brought about by means of or through the application of physical forces are known as physical unit operations. Because physical unit operations were derived originally from observations of the physical world. they were the first treatment methods to be used. Today, physical unit operations, as shown on Fig. 5-1, are a major part of most wastewater

The constituents of concern found in wastewater are removed by physical, chemical, and biological methods. The individual methods usually are classified as physical unit operations, chemical unit processes, and biological unit ds in which the application of physical forces ohysical unit operations include pr T3clarifiers

Determining wastewater flowrates and constituent mass loadings is a fundamental step in initiating the conceptual process design of wastewater treatment facilities. Reliable data for existing and projected flowrates affect the hydraulic characteristics, sizing, and operational considerations of the treatment system components. Constituent mass loading, the product of constituent concentration and flowrate

An understanding of the nature of wastewater is essential in the design and operation of collection, treatment, and reuse facilities, and in the engineering management of environmental quality. To promote this understanding, the information in this chapter is presented in eight sections dealing with (1)an introduction to the constituents found in wastewater, (2)sampling and analytical procedures, (3) physical characteristics, (4)inorganic nonmetallic constituents, (5) metallic constituents

Every community produces both liquid and solid wastes and air emissions. The liquid waste-wastewater is essentially the water supply of the community after it has been used in a variety of applications. From the standpoint of sources of generation, wastewater may be defined as a combination of the liquid or water-carried wastes removed from residences. institutions and commercial and industrial establishments together with such groundwater

7-1 Introduction to the Activated-Sludge Process Historical Development The activated-sludge p now used routinely for biological treatment of municipal and industrial dge process date back to the early 1880s to the work of stewater in tanks and the hastening of the oxidation quently by a number of investigators, ility could be secured by e Experiment Station

笔者从事工厂和民用建筑给排水工程设计十多年,完成的设计项目达一百多 项,项目客户包括欧美、日本、韩国、台资、国内等企业及研究所,绝大部分为工 厂项目,少数有高层民用建筑。不同国籍客户会有不同的设计要求、不同的喜爱偏 好、不同的工程习惯,不同行业客户又有不同的行业特点与要求,民用建筑又有不 同于工厂建筑的要求与特点,每参与一个项目就是一次学习与增长见识的机会,每 完成一个项目都会有不同的体会和提高以下是笔者对十多年给排水设计工作的体 会与总结,希望能与业中同仁一起交流探讨共同提高,其中有的观点不一定成 熟,甚至可能是不正确的,欢迎多予批评指正