浅谈生物填料在城市污染水体修复中的应用

The Application of the Biocides in Repairing the City Sewage

针对目前城市污染水体的生物修复技术多以在岸边布置生物反应器为主,虽然效果明显,但处理水量少、耗能大,对于较大面积的水体修复不太适合。本实验以抚顺某公园污水为研究对象,采用生物填料直接布设在公园水面上,并只在挂膜期进行100L/小时的间歇曝气的生物接触氧化法,对污染水体进行直接修复研究。生物填料以公园水体中原有的天然生物菌群作为种源,挂膜期间进行间歇曝气,白天曝气八个小时,晚上停止曝气。在缓流水体的自然流量的条件下在河道中经过大约15天的动态培养,填料丝上生物膜的外观也经历了无色、淡黑绿色、黑黄绿色、淡黑色、黑色的变化过程,同时填料丝上的生物也对应出现从无到以藻类为主、直至出现原生动物及微型后生动物的一系列变化过程,标志着新型生物填料在河流中动态挂膜的成功。在实验的八月到十月期间,进水COD在33.27～160.03mg/L之间,COD平均去除率为40.00%;氨氮进水浓度在3.66mg/L～18.08mg/L之间,平均去除率为36.43%;总磷进水浓度在0.16mg/L～4.21mg/L,平均去除率为43.02%。可见本法对城市污水主要污染物有良好的去除效率,为城市污染水体生物修复提供了一条可行途径,并为进一步大规模应用提供了可行参数。

In view of the current, the bioremediation technology of the polluted water in the city was main- ly used the shore- based bioreactor. This method had a good effect ion, but it will use a lot of energy and handle less water. So it is not suitable for repairing the larger waters. In this experiment, we research the polluted water in one park. We laid the biocides on the surface of the park water directly, and used the biological contact oxidation which areted 100 L/h intermittently only at the hanging membrane phases. Biological filler used the natural biological bacteria in the park water as a seed source. We areted intermit- tently at the hanging membrane phases. During the day, 8- hour exposure at night to stop aeration. We cultivated the bacteria in the natural flowing conditions for 15 days, The appearance of the biofilm on the filler wire has undergone a colorless, short black green, yellow green, short black, black change process. Meanwhile filler wire on the biological also showed never appeared to correspond until the emergence of animal emblema series d changes in process. It signed the successful that the new type biological filler linking membrane dynamically in the river. During August to October, the concentration of COD is 33.27-160.03 rng/L, that average removal rate is 40. 00 % ; the concentration of Ammonia is between 3.66 mg/L - 18.08 rag/L, that average removal rate is 36.43 % ; the concentration of TP is between 0.16 mg/L - 4.21 mg/L, that average removal rate is 43.02 %. This method can be seen a good removal d the mental pollutants in city sewage efficiency, and can also provide an avenue for the urban water pollution bioremediation. Besides, it also provide further a feasible parameters for the large - scale applications.