The first three types of control devices we consider--gravity settlers, cyclone separators, and electrostatic precipitators--all function by driving the particles to a solid wall, where they adhere to each other to form agglomerates that can be removed from the collection device and disposed of

A trickling filter is a nonsubmerged fixed-film biological reactor using rock or plastic packing over which wastewater is distributed continously

7-1 Introduction to the Activated-Sludge Process Historical Development Experiments conducted at the Lawrence Experiment Station during 1912 and 1913 by Clark and Gage With air input into wastewater, growths of organisms could be cultivated in bottles and in tanks partially filled with roofing slate spaced about 25 mm (1 in) apart and would greatly increase the degree of purification

一、概况 我国东南某印染厂日排放综合工业污水为 1000 吨/天，其中生产废水 800 吨/天，总变化系数 K 总 1为 1.5，生活污水 200 吨/天，总变化系 数 K 总 2为 1.3

Treatment methods in which the application of physical forces predominate are known as physical unit operations. Examples of physical unit operations include screening, mixing, sedimentation, gas transfer, filtration, and adsorption. Treatment methods in which the removal or conversion of constituents is brought about by the addition

1. Please list the main purposes of BOD5 test for wastewater treatment and waterbody remediation. Please discuss the effects of temperature of wastewater on its treatment unit unit/process selection(in English, 15%)

一、概况 我国西南某市规划建设城市污水处理厂，建设用地及其地形情况如下 图所示(尺寸单位：cm；标高单位：m)： 距建设用地南侧约 400 m 处现有 10 kv 的高压输电干线。另外，建设 用地北侧规划建设一条宽 60 m 的城郊公路

Part I Wastewater Engineering 1 Wastewater Engineering: An Overview Fig. 1-1 Schematic diagram of a wastewater management infrastructure

1. Please draw a schematic diagram of the municipal wastewater treatmentprocess and explain in details the principles involved in each treatment step(inEnglish, 20%)

一、概况 我国西北某市城市污水经总干管汇集到北郊 A 河排放，因污染严重，现拟在排放口 附近一块东西向长 800 米、南北向长 1000 米的矩形规划用地上建设特大型城市污水 处理厂，设计污水处理规模为 100 万吨/天，总变化系数 K 总为 1.2，时变化系数 K 时 为 1.1