天津某污水厂设计文献综述

 2021-10-26 21:52:11

毕业论文课题相关文献综述

浅谈农村生活生产污水处理工艺摘要:近年来,随着人们生活水平的提高,人们水资源的关注度日渐提高,除了城市生活污水、工业废水等受到关注,农村生活生产污水也开始受到关注。

相比于城市生活污水和工业废水,农村生活生产污水在污染物数值上和两者都有不同。

众所周知,我国是一个农产品需求大国,那么如何处理农业生产所产生的污水是一个不可小视的问题,同时人们生活水平提高也使得生活污水中有大量的污染物质。

本文将阐述处理农村生活生产污水的常用污水处理工艺,例如人工湿地,并且总结处理污废水资源的工艺进行分析,浅谈中国农业污水处理工艺发展趋势。

关键词:水资源;污染物数值;农村生活生产污水;污水处理工艺;人工湿地Abstract:In recent years, with the improvement of people's living standards, people pay more and more attention to water resources. In addition to urban sewage and industrial wastewater, rural sewage has also begun to attract more and more attention.Compared with urban sewage and industrial wastewater, the pollutant value of rural sewage is different from both.As is known to all, China is a big country in the demand for agricultural products, so how to deal with the sewage produced by agricultural production is a problem that cannot be ignored. At the same time, the improvement of people's living standards also leads to a large number of pollutants in domestic sewage.This paper will elaborate the common sewage treatment technology for the treatment of sewage from rural living and production, such as constructed wetlands, and summarize the treatment of sewage resources for analysis of the technology, talk about the development trend of China's agricultural sewage treatment technology.Key words: Water resources; Pollutant value; Rural sewage; Sewage treatment technology; Constructed wetlands1、农业生活生产污水组成及现状1.1农业生活生产污水组成我国在农业发展以来,人类为了增加农产品的产量,大量地施用化学肥料、杀菌剂、除草剂等化学药剂,牲畜饲养、农产品加工等生产规模越来越大,农业污水的污染日趋严重,生态平衡受到影响,甚至遭到破坏。

我国农业污水主要来源于农村生活污水,禽畜养殖废水,农田尾水及农村加工废水,目前,我国农业源污染排放已占污染总排放的一半[1]。

农业的化肥农药的大规模使用,使本来影响非常小的农业生产活动变成了水体污染的主要来源。

氮、磷、钾肥引起的水体富营养化,高残留,难降解的农药容易引起的水体污染。

1.2农业生活生产污水现状目前,我国的农村有九成以上没有污水处理设施和排水管网,全国农村每年产生的污水有90亿吨之多,这些污水在乡村被随意排放,严重地破坏了农村的生存环境。

同时,由于城市的过度发展,很多工业项目已经开始向农村进行转移,随之而来的是对农村生态环境的肆无忌惮的破坏[2]。

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