贝壳填料用于生活污水对磷和化学需氧量的处理研究

Research on Application of Shell Packing in Removal of Phosphorus and Chemical Oxygen Demand(COD) From Domestic Sewerage

研究发现表面粗糙、含有大量碳酸钙的贝壳,可作为生物膜的载体及硝化反应的碱度来源。利用贝壳作填料,通过一个月的小试研究,考察了厌氧固定膜反应器在15~22℃条件下的运行效果。在水力停留时间分别为4 h、8 h和12 h的条件下,检测反应器处于酸化条件下对污染物的处理效果。经分析对比,在水力停留时间为8 h的条件下,除磷和COD去除效果最好,平均COD去除率稳定在60%左右,平均TP去除率稳定在50%左右。试验结果表明,贝壳是一种理想的酸化反应器微生物附着和生长载体,从技术和经济角度,水力停留时间设定为8 h较佳。

The shell with rough surface and containing a large amount of calcium carbonate, can be used as biofilm cartier and alkalinity source of nitration. In this paper, the shell was used as the filler, through the test in a month, running effect of the anaerobic fLxed film reactor under the condition of 15-22℃ was investigated. When the hydraulic retention time was 4 h, 8 h and 12 h, respectively, the treatment effect of the test reactor for pollutants under acidic condition was analyzed. The results show that, when th^hydraulic retention time is 8 h, phosphorus and COD removal effect is the best, the average COD removal rate is around 60%, the average TPremoval rate is around 50%. The test results show that the shell is a kind of ideal microbial adhesion and growth carrier in the acidification reactor, the suitable hydraulic retention time is 8 h.