农村生活污水利用中水力负荷对污染物分布和草地净化效率的影响  

Effects of hydraulic load on pollutant distribution and grassland purification efficiency in rural domestic sewage utilization

作　　者：苏闯建 王大扬 舒焱 于振江 陈志华 潘振东 林彰文 Su Chuangjian;Wang Dayang;Shu Yan;Yu Zhenjiang;Chen Zhihua;Pan Zhendong;Lin Zhangwen(Guangdong Provincial Academy of Environmental Science,Guangzhou,Guangdong 510000,China;Guangzhou Zengcheng Drainage Co.,Ltd.,Guangzhou,Guangdong 511300,China)

机构地区：[1]广东省环境科学研究院,广东广州510000 [2]广州市增城排水有限公司,广东广州511300

出　　处：《水土保持通报》2025年第1期1-9,共9页Bulletin of Soil and Water Conservation

基　　金：广州市水务局科技项目“广州市农村生活污水处理设施精细化管理模式研究”(穗污管办合字[2023]38号);广东省生态环境厅、广东省农村生活污水治理高质量发展技术支撑项目(XMHT-2024-NC-KY069)。

摘　　要：[目的]探究草地消纳利用农村生活污水过程中污染物分布规律,为农村生活污水资源化利用的风险防控提供科学参考。[方法]考察草地消纳利用农村生活污水过程中水力负荷对土壤溶液和土壤污染物分布的影响,分析不同深度土壤溶液和土壤污染物变化规律,并进一步通过Pearson相关系数探讨水力负荷与土壤溶液和土壤污染物之间的关联性及影响程度。[结果](1)随着水力负荷由0.005 m^(3)/(m^(2)·d)逐渐增加至0.05 m^(3)/(m^(2)·d),草地中出现NH_(4)^(+)-N和NO_(3)^(-)-N富集现象,而且NO_(3)^(-)-N反硝化性能不佳是制约草地脱氮速率的限速步骤。(2)水力负荷与土壤NH_(4)^(+)-N含量之间具有良好的正相关性,相关性系数高达0.94。[结论]草地消纳利用农村生活污水过程中应合理分配水力负荷,做好环境风险管控。[Objective] The pollutants distribution during grassland digestion and utilization of rural domestic sewage was explored in order to provide a scientific reference for risk prevention and control in the resource utilization of rural domestic sewage.[Methods]This study investigated the effects of hydraulic load on soil solution and soil pollutant distribution during the grassland digestion and utilization of rural domestic sewage.It also analyzed the variations in soil solution and soil pollutants at different depths and explored the correlation among hydraulic load,soil solution,adn soil pollutants using the Pearson correlation coefficient.[Results] As the hydraulic load increased gradually from 0.005 m^(3)/(m^(2)·d)to 0.05 m^(3)/(m^(2)·d),an accumulation of NH_(4)^(+)-N and NO_(3)^(-)-N was observed in the grassland.The poor denitrification performance of NO_(3)^(-)-N was identified as the limiting step restricting the denitrification rate of the grassland.@The hydraulic load showed a strong positive correlation with the NH_(4)^(+)-N content in the soil,with a correlation coefficient of o.94.[Conclusion]During the grassland digestion and utilization of rural domestic sewage,it is necessary to distribute the hydraulic load rationally and control the environmental risks.

关 键 词：农村生活污水 资源化利用 水力负荷 污染物分布 

分 类 号：X52[环境科学与工程—环境工程] X799.3