（毕业设计论文）《日处理150吨垃圾渗滤液工程设计》.doc

设计总说明 城市垃圾的产量与日俱增，已经给城市环境与居民健康都带来了很大的危害。因此，如何采取相应的措施和方法对城市垃圾进行处理，已成为不可忽视的大事。 目前，国内外城市垃圾的处置主要有焚烧、卫生填埋、地表堆放、堆肥等。垃圾填埋因其具有技术成熟、处理费用低、管理和运输方便等优点而被广泛地应用。 但是垃圾填埋产生的垃圾渗滤液是一种很难处理的有毒有害的高浓度有机废水, 这种废水若处理不当, 就会引起地面水、地下水、土壤等严重二次污染, 并对生态系统和人体健康带来巨大威胁。 我的设计处理量为150吨每天。设计时严格遵从以下原则。严格执行国家有关环境保护的各项法规；采用先进、成熟、合理、可靠、节能的工艺，确保处理量及水质排放达到标准。对于工艺中所采用的设备要求工况稳定，能耗低，完全能满足生产要求；在整体改造思路中尽量使全套污水处理系统自动化水平最大化；流程布局合理，整体感强，外观装饰美观大方，环境绿化优美；在上述前题下，做到投资少，运行费用低。 渗滤液经处理后，其出水水质标准要达到《生活杂用水水质标准CJ25.1-89》中规定一级标准。 文中首先介绍了本设计的背景资料，并列出相关设计依据和原则。 接着，简要介绍了垃圾填埋场渗滤液水质特征，并对渗滤液的处理工艺如好氧处理、厌氧处理、厌氧-好氧联合处理、物化处理及土地处理进行了简要的论述和讨论。 文章的主体部分将阐述本处理工艺的基本原理，设计过程，相关构筑物及设备的选择说明。 在附录中，本文将给出本工艺的部分图解。 关键词：垃圾渗滤液，氨氮，生物接触氧化 Brief Introduction The output of waste from cities grows day by day. It has brought great harm to both the urban environment and the inhabitant health. Therefore, takeing the corresponding countermeasure and the method to treat the town refuse has become the noticeable important matter. At present, the methodes of treating the city waste are mainly burning down, the health filling in buries, the surface piling up, the compost and so on, both indomestic and foreign countries.Trash filling in buries is widely applied.Because the technology is mature, the processing expense is low, management and transportation is convenience and so on. Leachate is formed when water passes through the waste in the landfill cell. It is the virulent harmful and highly concentrated organic waste water. It is very difficult to process.If it was treated improperly, it would pollute the ground water, the underground water, the soil and so on ,which is called the second-time pollution. Even worse,it would brings the huge threat to the ecosystem and the human body health. The load is 150 tons a day in my design.In the design When processing, several principles should be obeyed.Various country-standard laws and regulations that related to environmental protection should be strictly executed. Advanced, mature, reasonable，energy conservation craft is