生态高负荷土地快速渗滤系统处理猪场废水的效能及微生态

发布时间：2018-07-08 14:56

本文选题：复合生态高负荷土地渗滤 + 猪场废水　；参考：《环境科学》2017年10期

【摘要】：以经过厌氧反应器处理后的猪场废水为研究对象,探讨了新型生态高负荷土地快速渗滤系统对废水中COD、氨氮及总氮的去除情况;同时分析了该系统中的微生物群落结构以及过氧化氢酶、脲酶、硝酸盐还原酶的含量.结果表明,在水力负荷为11 cm·d~(-1)、进水COD为700 mg·L~(-1)左右的条件下,一级土地渗滤柱与二级土地渗滤柱对COD的去除率分别为78.8%与63.0%,总去除率达到了92.6%;而当水力负荷增大到22 cm·d~(-1)时,总的COD去除率仍在90.0%以上;该系统对于氨氮的去除更为显著,去除率可达99%左右.一级土地快速渗滤系统中上、中、下部的过氧化氢酶含量分别为1.899、0.990、0.323 m L·g~(-1),表明猪场废水中的有机物主要在该系统的上部与中部得以去除;二级土地快速渗滤系统上、中、下部的硝酸盐还原酶含量分别是3.453、3.831、1.971 m L·g~(-1),表明脱氮作用主要发生二级土地快速渗滤系统的上部与中部.该土地快速渗滤系统中微生物以Gram Negative与Gram Positive为主,特别是在二级土地快速渗滤系统中,AM Fungi与Actinomycetes占有一定比例,为猪场废水中难降解有机物的去除提供了保障.
[Abstract]:The removal of COD, ammonia and total nitrogen in the wastewater by a new ecological high load land rapid infiltration system after the anaerobic reactor was studied. The microbial community structure and the content of catalase, urease and nitrate reductase in the system were analyzed. Under the condition of 11 cm / d~ (-1) and 700 mg. L~ (-1), the removal rate of COD was 78.8% and 63% respectively, and the total removal rate reached 92.6%, respectively, while the total removal rate was more than 90% when the hydraulic load increased to 22 cm d~ (-1), and the system for ammonia nitrogen removal was more obvious. The removal rate can reach about 99%. The contents of catalase in the upper, middle and lower parts of the first grade land rapid infiltration system are 1.899,0.990,0.323 m L. G~ (-1), indicating that the organic matter in the piggery wastewater is removed mainly in the upper and middle parts of the system; the nitrate reductase content in the middle and lower part of the two grade land rapid infiltration system is respectively It is 3.453,3.831,1.971 m L / g~ (-1), which indicates that denitrification mainly occurs in the upper and middle part of the two grade rapid infiltration system. The microorganism in the rapid infiltration system of the land is dominated by Gram Negative and Gram Positive, especially in the two grade rapid infiltration system. AM Fungi and Actinomycetes occupy a certain proportion of the piggery wastewater. The removal of refractory organic compounds provides a guarantee.
【作者单位】：广西师范大学环境与资源学院;广西师范大学岩溶生态与环境变化研究广西高校重点实验室;
【基金】：岩溶生态与环境变化研究广西高校重点实验室资助项目(YRHJ16Z007,YRHJ16Z018) 桂林市科技项目(2016012503)
【分类号】：X713

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