延安市农村生活源水污染物产排系数研究

Research on the Pollutant Production and Discharge Coefficient of Rural Domestic Water in Yan'an

为研究延安市农村生活源水污染物的产排系数特征,在延安市洛川县选取3个典型镇的30户居民,分别对丰水期、平水期和枯水期的农村生活源水污染物进行3期调研分析。运用Grubbs检验法对调查数据进行了异常值剔除。调查结果表明:调研地区农户厕所类型均为旱厕;生活污水排放量为12.25 L/(人·d);用排水比例系数为0.73;CODCr、BOD5、氨氮、总氮、总磷、动植物油的排放系数分别为21.03、10.71、0.06、0.29、0.04、0.07 g/(人·d)。采用SPSS分析可知:居民用水量与BOD5、氨氮、总氮、总磷、动植物油的排放系数呈显著正相关,经济状况与用排水比例系数、CODCr排放系数呈显著正相关。本次调研为陕西省首次进行的农村生活源水污染物普查提供数据支撑。

In order to study the characteristics of the production and discharge coefficient of rural domestic water pollutants in Yan'an area,30 households in 3 typical towns in Luochuan County,Yan'an City are selected to conduct three investigations and analysis on rural domestic water pollutants in high flow period,level period and dry period.Abnormal values are removed from the survey data by using the Grubbs test.The survey results show that the types of toilet for farmers in the survey area are all aqua privies.The discharge of domestic sewage in the investigated area is 12.25 L/(person·d).The ratio coefficient of water consumption to discharge obtained is 0.73,and the discharge coefficients of CODCr,BOD5,ammonia nitrogen,total nitrogen,total phosphorus,animal and vegetable oils are 21.03,10.71,0.06,0.29,0.04,0.07 g/(person·d),respectively.SPSS analysis shows that water consumption is positively correlated with BOD5,ammonia nitrogen,total nitrogen,total phosphorus,animal and vegetable oil discharge coefficient,and economic status is positively correlated with the ratio coefficient of consumption to discharge and CODCr discharge coefficient.This survey provides data support for the first general survey of pollutants in rural domestic water in Shaanxi Province.