Treatment of turtle-breeding wastewater and domestic fecal sewage with soil cultivating system

Turtle-breeding wastewater and domestic fecal sewage were treated by means of soil cultivating system. Results indicated that more than 50% CODCr and BOD5, of wastewaters were removed, removal rates of NH4+ -N could reach about 70%-80%, but PO43- could not be removed. The thesis analyzed functional mechanisms for pollutants and put forward main elements affecting treatment efficiencies, thus provided conditions for further research.

反硝化除磷系统的启动及其稳定性研究

采用厌氧／缺氧(A／A)SBR为研究对象,通过启动试验研究了反硝化除磷菌(DPB)选择和富集的必要条件。试验结果表明,厌氧／缺氧交替的环境和合适的C、N值可使DPB快速成为系统中的优势菌群;稳定运行后的系统,当进水CODCr:N:P为250:60:10．5时除磷所用碳源最少,且C、N、P的去除率均在90％以上。当进水CODCr为250 mg／L,SRT、为18 d左右,进出水硝氮浓度分别控制在1．5 mg／L和7 mg／L以下时,系统运行稳定性较好。