给排水工程专业饮用水水质问题及对策大学毕业论文外文文献翻译及原文

毕业设计（论文）外文文献翻译文献、资料中文题目：饮用水水质问题及对策文献、资料英文题目：文献、资料来源：文献、资料发表（出版）日期：院（部）：专业：给水排水工程班级：姓名：学号：指导教师：翻译日期： 2017.02.14毕业设计外文文献翻译学生姓名：学号：所在学院：专业：给水排水工程论文题目：Drinking Water Problems andSolutions Abstract指导教师：2007 年6月15日Drinking Water Problems and Solutions Abstract1 Introduction：Chlorination oxidation Introduction nearly half a ce ntury, the world economy has been developing rapidly, modernizationof industries, in particular synthetic chemical is used. Thesechemicals through most of human activities into a body of water, such as sewage and industrial wastewater discharges Agricultural use of fertilizers, pesticides wastage so that the water body accepted the physical and chemical traits a significant change [1]. Early 1980s found that more than 2,000 water organisms, water is more than 700, Among them, 20 kinds of carcinogens, suspected carcinogens 23 species, 18 species of croton oil, and 56 kinds of mutagens [2]. Now the world has attached great importance to trace organics pollution and human health.Currently many of the world's developing countries for drinking water purification methods, basically conventional coagulation sedimentation → → → sand filter chlorine disinfection process. This process for clarifying water to eliminate pathogens in water is very effective. After generally considered the conventional process, filter water after E. coli bacteria and infectious diseases such as HIV have access to basic removal. But with the water pollution, the intensification of a wide variety of organic matter into a body of water formed real solution, the conventional process is almost powerless. China's GB5749-85 "standard of drinking water" [3] Water detected a total of 35 projects. EC Directive provides drinking water were 66, the World Health drinking water regulations is 47. Compared with China, mainly to the increase in the trace organics project. Organic pollution of the drinking water situation, we must find new approaches.2 Commonly used method of disinfection of water treatmentIt is low cost, simple equipment, operation and management easy. But with the water chlorination of organic reaction occurred replace skull organic compounds, the so-called "three to" material, right, poses a potential human health hazards.1970s, the Netherlands and the United States found that treatment workers, chlorination, drinking water produced trihalomethanes (TCM) compounds, mainly chloroform,dichloroacetic acid, chlorine and bromine between the intermediate product. After the chlorination of drinking water has not only generated three skull methane, but also generate other skull Organics (TCO), concentration of TCM general concentration of 5 ~ 10%, which on human health have the same adverse effects [4]. TCM TCO and the main precursorof the three major categories : ①wreckage from the plant as a result of humic acid and fulvic acid degradation products, such as resorcinol, homovanillic acid and fulvic acid degradation products; ②algae from the pyrimidine amino acid, tryptophan, proline, uracil, protein; ③ industrial wastewater of certain compounds, such as phenols. Use chlorine to disinfect TCM TCO and the emergence of awareness of the existence of the hidden danger. Thus, non-chlorine disinfection technology research to develop rapidly.3 measures and the development trend [5] to solve the drinking water problem of pollutionthere are two ways : ①protection of drinking water sources;②strengthen water treatment processes. Generally speaking, the quality of our water environment is also hard to improve short period of time. To the increasing demands for drinking water, water pollution from access to quality drinking water, alternative method is to strengthen the water treatment process that uses advanced deep water treatment technology. Is briefly described below4 ConclusionClosing above the new water treatment technology now have their own shortcomings, to be further explored and examined. If UV-ozone and UV-CO2 is the most promising of the two photochemical oxidation, desire of the family or group users of drinking water depth and special treatment of organic wastewater treatment play an important role. UV-O3 combinedtechnique has been USEPA (EPA) to address the identification of multiple chlorobenzene the most effective technology. But the process in the current obstacles to the use of CO2 is separated from the water, choose a suitable carrier and fixed method, preparation or other forms of photo-catalyst, and research and development of photochemical oxidation and water needs to deal with the combination of UV light or metal skull of lights, so power, wavelength suitable and convenient. Membrane operate with convenience, good effect, but easy to silting and pollution, with its investment and operating costs are too high. KMnO4 and ozone oxidation, often generate many intermediate products, and even some organic fundamental ineffective. Therefore, in recent years more and more emphasis on the treatment of workers in physical, chemical, biological purification organically combine bold attempt, Research such as O3 - H2O2 - BAC, O3 - coagulation-activated sludge, KMnO4 - BAC O3-UV-H2O2, O3-film processing, O3-stripping and other possible joint technology, give full play to their respective means of the technical features and advantages of comprehensive management, in order to achieve the best removal.饮用水水质问题及对策1 引言近半个世纪以来，世界各国经济迅速发展，现代化工业，尤其是合成化工业更是突飞猛进，这些化学物质的大部分通过人类活动进入水体，如生活污水和工业废水的排放，农业使用化肥、杀虫剂的流失等，使接纳水体的物理化学性状发生了显著的变化〔1〕。