Discharge characteristic of rural domestic sewage in typical northern suburban village
In recent years,with the rapid urbanization,suburban villages,as a kind of typical rural area,are facing increasingly serious environmental problems due to their faster economic development,more concentrated population and diversified industries than traditional rural regions.Suburban villages have gradually become the key points of rural sewage treatment.The research was carried out in a typical suburban village under the Yellow River Basin,and investigate the quality characteristics and the discharge dynamics of domestic sewage.Our study supplements the basic data of domestic sewage treatment in such typical rural areas,and helps to carry out sewage treatment in suburban villages more scientifically.The results show that the temperature of domestic sewage of study area is basically kept above 10 ℃ throughout the year;the daily discharge per capita is 91～136 L·cap-1·d-1 in non rainy season;the total sewage discharge varies from 150～600 m3.d-1;the average levels of the TN,NH4+-N,TP and COD are 36.4,34.0,2.5 and 131.0 mg·L-1,respectively.In summary,the domestic sewage of suburban village has the characteristics of large sewage volume,low pollutant concentration and wide fluctuation range.So it is suitable for eco-treatment technology or the combination of biological and ecological domestic sewage treatment technology.
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