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    Study on Phosphorus Removal of Secondary Effluent of Municipal Wastewater Treatment Plant by Fly Ash
    粉煤灰对城市二级污水处理厂出水中磷去除条件的研究
    In order to prevent and control day by day the serious nitrogen phosphorus pollution and the eutrophication, our country set the strict request to the city two levels of sewage treatment plants water leakage nitrogen phosphorus standard.
    为了防治日益严重的氮磷污染和富营养化,我国对城市二级污水处理厂出水的氮磷标准提出了严格的要求。
    To combat the growing nitrogen phosphorus pollution and water nutrient over-enrichment, the new "comprehensive wastewater sewage discharge standards" (GB8978-1996) which has been carried out since Jan.l 1998 demand strict nitrogen phosphorus standards in secondary wastewater treatment plants.
    为了防治日益严重的氮磷污染和水体富营养化,我国1998年1月1日实施的新的《污水综合排放标准》(GB8978-1996)对城市二级污水处理厂出水的氮磷标准提出了严格要求。
    Presently,active sludge method,or the establishment of secondary sewage treatment plants has been mainly adopted to treat urban sewage.
    目前,对城市污水的处理主要采用活性污泥法即兴建城市二级污水处理厂。
    It is also generally recognized as a more mature technology on urban sewage treatment. However,it is not suitable for Xinhai district because the annual average BOD concentration of the effluent discharged into the Dapu River is 48.4mg/l,approaching to the level of treated water quality(30mg/l) from the secondary sewage treatment plant. In addition,both the construction and operational cost of the plant is too high to afford.
    无疑,兴建城市二级污水处理厂是处理城市污水比较成熟的方法,但是,这一方法并不适用于新海地区, 因为, 最终流入大浦河的污水其 B O D 年平均浓度为484 mg/l,它已接近二级污水处理厂的出水水质(30 mg/l) ,另一个原因,城市二级污水处理厂的建设和运行费用太高。
    The Zhujiahe sewage treatment plant is the first of its kind in Qingzhen City,Guizhou Province. As a second rank sewage treatment plant,it has made use of the advanced CASS technology. This paper gives a brief account of its design method and parameters.
    清镇朱家河污水处理厂是清镇市第一座城市二级污水处理厂 ,污水处理工艺采用了较先进的CASS工艺 ,现简述其工艺设计方法及参数取值。
 

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