Solid wastes comprise all the wastes arising from human and animal activities that are normally solid and that are discarded as useless or unwanted. The term solid waste as used in this text is all-inclusive, encompassing the heterogeneous mass of throwaways from the urban community as well as the more homogeneous accumulation of agricultural, industrial
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The control of particulates and VOCs is mostly accomplished by physical processes (cyclones, ESPs, filters, leakage control, vapor capture, condensation) that do not involve changing the chemical nature of the pollutant. Some particles and VOCs are chemically changed into harmless materials by combustion. This chapter and the next concern pollutants--sulfur oxides and nitrogen
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Volatile organic compounds (VOCs) are liquids or solids that contain organic carbon (carbon bonded to carbon, hydrogen, nitrogen, or sulfur, but not carbonate carbon as in CaCO3 nor carbide carbon as in CaC2 or CO or CO2), which vaporize at significant rates. VOCs are probably the second-most widespread and diverse class of emissions after particulates
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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
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一、工程学及其与基础科学的关系 人类的一切科学活动不外乎有两个目的:一是认识自然,一是适应自然、保护自然 和改造自然。前者对应着自然科学中的基础科学,也称为理学,后者则对应着自然科学 中的工程技术科学,也称为工程学或工学;工程学和基础科学之间的这种目的的差异是 它们相互区别的根本所在,也反应了这二大学科的变质所在
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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
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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%)
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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
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1. Please draw a schematic diagram of the municipal wastewater treatmentprocess and explain in details the principles involved in each treatment step(inEnglish, 20%)
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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
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