2000td生活污水处理工程设计.doc
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- 2000 td 生活 污水处理 工程设计
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1、摘要随着城市化速度的加快和生活水平的提高,城市生活污水的排放量也逐年增加。城市生活污水污染物含量主要是有机物,如淀粉、脂肪、蛋白质、纤维素、糖类、矿物油等,其中CODcr、BODs、TKN(凯氏氮)、TN、TP也较高。目前我国城市污水处理普遍采用活性污泥、氧化沟、SBR和AB法等。本设计为小区污水处理工程,具有排放量小,可生化性好,含有相当浓度的N和P,排放上具有间歇性和不稳定性等特点,故选择SBR法处理工艺。SBR法工艺流程简单、造价低,主体设备只有一个序批式间歇反应器,无二沉池、污泥回流系统,初沉池也可省略,布置紧凑、占地面积省,可根据水质、水量情况灵活运行,具有良好的脱氮除磷效果。而生活
2、小区土地面积有限,景观要求高。通过采用SBR法处理小区生活污水,处理效果好,COD、BOD、SS、TNP和NH3一N去除率分别达到88.75、87.50、86.10 、84.50和51.70 ,且都达到GB89781996中一级排放标准。本设计要求处理水量为2000m3/d。原水进水水质如下:BOD=200mg/L, COD=400mg/L, SS=200 mg/L, pH=6.58.5,NH3-N=40mg/L,磷酸盐为5毫克/升。要求经过主要处理设备处理后,出水水质参数如下:BOD520mg/L ,SS60mg/L,COD90mg/L,pH69,NH3-N 10mg/l。关键词:SBR,生
3、活污水,水处理AbstractWith the acceleration of the pace of urbanation and the improvement of the living standards, the urban sewage water emissions are increasing year by year. The main pollutants in city sewage is in organic matter, such as starch, fat, protein, cellulose, sugar, mineral oils, which CODcr
4、, BOD, TKN (Kjeldahl nitrogen), TN, TP is also higher. Chinas urban sewage treatment widely used activated sludge, oxidation ditch, SBR and AB process. The design of the district sewage treatment works with small emissions, biodegradability, and contain significant concentrations of N and P, Emissio
5、n is intermittent and stability characteristics, so choose SBR Process.Simple technological process and cost of construction are the features of SBRSequencing batch reactor is its main equipment,the equipment of return udge and primary settling tank is omittedIt has fl co mpact structure and flexibi
6、lity of operation base on the basis of the amount of sewage and sewage qualityThe removal efficiency of nitrogen and phosphorus is very goodBut the land of habitat is finite,so we used applied to treat the domestic sewage of habitatThese results showed that high quality of effluent could be obtained
7、 by the means of SBR,and the removal efficiency of COD,BOD,SS,TNP and NH3N were 88.75 ,87.50 ,86.10 ,84.50 and 51.70 respectivelyThe effluent water quality meets GB89781996 I standardThis design requirements handling 2,000 m per day of water Influent raw water quality are as follows : BOD = 200 mg /
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