建德市下涯镇大洲村生活污水处理工程设计.doc
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1、建德市下涯镇大洲村生活污水处理工程设计摘 要:近些年来,随着农村经济的快速发展,生活水平质量有了明显提高,居民生活的排放量也随之增大。农村地区的环境质量大幅下降,环境状况更是日益恶化,导致了广大农民群众的生存环境与身体健康受到了严重的威胁,农村经济的健康发展也同时受到了制约,因此现阶段对农村生活污水的处理势在必行。本文对规模为50 t/d,进水水质pH为69,COD为350 mg/L,BOD5 为150 mg/L,SS为300 mg/L,色度3倍,氨氮为30 mg/L的农村生活污水进行处理工程的设计。针对该项目污水悬浮物、有机物浓度高,可生化性好的特点,本文主要采用微动力无回流脱氮生物处理工艺
2、处理废水,设计出水水质要求pH为6 9,COD为60mg/L,BOD5为20 mg/L,SS为20 mg/L,色度为1.5倍,氨氮为8 mg/L。本文根据农村生活污水产生的特点,以及对两种工艺的处理特点和经济性进行比较,采用微动力无回流脱氮生物处理工艺对农村生活污水进行处理,它省去了传统生物脱氮工艺中的污泥回流系统,具有更高的处理效率,更好的稳定性,更少的占地面积等优点。关键词:农村生活污水;水处理;微动力无回流脱氮生物处理工艺Design of sewage treatment engineering of Dazhou Village,Xiaya Town in Jiande CityAb
3、stract In recent years, with the rapid development of the rural economy, increased emissions, environmental status of rural area is worsening, led to the rural environmental quality decreased significantly, the broad masses of peasants threatens the survival of environment and health, the healthy de
4、velopment of the rural economy are restricted, therefore be imperative for the treatment of rural domestic sewage. In this paper, the size of 50 t/d, influent water quality pH to 6 to 9, COD of 350 mg/L, BOD5 as 150 mg/L, SS as 300 mg/L, chroma as 3 times for rural sewage, ammonia nitrogen 30 mg/L f
5、or engineering design. According to the suspension, the project of sewage with high concentration of organic matter, better biodegradability, this paper mainly adopts the micro force no reflow denitrification biological treatment process of wastewater treatment, the effluent quality requirements of
6、design of pH is to 6 to 9, COD of 3 60mg/L, BOD5 as 20 mg/L, SS as 20 mg/L, chroma as 1.5 times, ammonia nitrogen 8 mg/L. According to the characteristics of rural domestic sewage generated, and the processing characteristics of two kinds of technology and economy comparison, the micro power no refl
7、ow biological nitrogen removal process for treating domestic sewage in rural areas, it leaves out the conventional biological removal of nitrogen in the process of sludge return system, has the higher processing efficiency, better stability less land, etc.本文对规模为50 t/d,进水水质pH为69,COD为350 mg/L,BOD5 为15
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