书名: 环境工程专业英语

丛书名: 全国高职高专规划教材

ISBN: 9787511120212

作者：张之浩，王晖主编

《全国高职高专规划教材:环境工程专业英语》共分四个部分，含10个单元，每单元编有课文一篇或两篇，配练习题若干，部分单元附有阅读文章对课文内容进行补充。本书专业内容选用最新科技材料，涉及环境科学、生态学、环境工程和环境污染等方面，重点突出水、气、渣的污染治理和资源回收利用及分析检测技术等环境工程专业知识。全书体裁多样，语言规范，实用性强。

Part Ⅰ Water Treatment 
Unit 1 Brief Introduction to Water Treatment 
Text Water Pollutants and Their Sources 
Unit 2 Primarv Treatment 
Text A Wastewater Pretreatment ( 1 ) 
Text B Wastewater Pretreatment ( 2 ) 
Unit 3 Secondary Treatment 
Text A Aerobic Treatment- Activated Sludge System 
Text B Anaerobic Wastewater Treatment 
Text C Flocculation 
Unit 4 Tertiary Treatment 
Text A Applications of Advanced Oxidation 
Text B Advanced Waste Treatment of Secondary Effluent with Active Carbon 
Unit 5 Sewage Treatment Plant 
Text A Typical Project of Sewage Treatment Plant ( 1 ) 
Text B Typical Project of Sewage Treatment Plant ( 2 ) 
Part Ⅱ Air Pollution Control Techniques 
Unit 1 Air Pollution Control (Gas) ............

Adsorption 
Gas adsorption as contrasted with absorption is a surface phenomenon. The gas molecules are sorbed i.e. attracted to and held on the surface of a solid. Gas adsorption methods are used for odour ( 气味 ) control at various types and stages of chemical-manufacturing and food-processing facilities in the recovery of a number of volatile solvents (eg., benzene 苯 ) and in the control of VOCs at industrial facilities. 
Activated carbon (heated charcoal) is one of the most common adsorbent materials,which is very porous and has an extremely high ratio of surface area to volume. Activated carbon is particularly useful as an adsorbent for cleaning air-streams that contain VOCs and for solvent recovery and odour control. A properly designed carbon adsorption unit can remove gas with an efficiency exceeding 95%. 
Incineration 
The process called incineration or combustion can be used to convert VOCs andother gaseous hydrocarbon pollutants to carbon dioxide and water. Incineration ofVOCs and hydrocarbon fumes is usually accomplished in a special incinerator calledan afterburner. To achieve complete combustion, the afterburner must provide theproper amount of turbulence and burning time and it must maintain a sufficiently high temperature. Sufficient turbulence or mixing, is a key factor in combustion becauseit reduces the required burning time and temperature. A process called direct flameincineration can be used when the waste gas is itself a combustible mixture and does not need the addition of air or fuel.