Experimental study on bioremediation of city river and its effects on transformation of nitrogen in sediments
城市内河生物修复及其对底泥氮素转化影响的实验研究

The feasibility and procedures of bioremediation in city river with special high concentration of org-N and org-C in sediments were studied.The most important source of the N-release is the decomposition of org-N. Aeration of river water can promote degradation of TN and NH3-N.Comparing with river water which is not aerated,the removal rates of TN and NH3-N can reach 81% and 92% in aerated water.At this point bioremediation with indigenous aquatic plants can get good results and high success rate.The concentration of TN and NH3-N can keep lying below 1 mg/L and 0.5 mg/L.The reduction of effective optical radiation must be avoided in bioremediation.