Study On The Method Of Evaluating Landscape Waters Quality In Hefei And In-situ Bioremediation Experiment Using Multiple Enzymes

Study on the method of evaluating landscape waters quality and the experiments of pollution control have have important meanings to the protection and management of landscape waters, and has a high reference value. In this paper , the main results of the study as follows:1. Using single factor index and comprehensive weighting method, eutrophication evaluation method and fuzzy comprehensive evaluation method to evaluate the landscape waters quality in hefei.We found that different evaluation methods focus on different points, have different advantages, disadvantages and applicability.2. According to the discussion the interrelated standards about reclaimed water and landscape water, we can see that the quality of reclaimed water in hefei, the standards of reusing of reclaimed water and the requirement of landscape water are contradictory, which leads to those landscape waters are easier to be eutrophication. This proposal: improve the standards of reclaimed water properly, controll the stay time of reclaimed water, take measures to prevent and control the landscape eutrophication, controll the toxic and hazardous pollutants and pathogens strictly and perfect the related standard system of reclaimed water and landscape water.3. The result of experimental study on in-situ bioremediation using Multiple enzymes as follows: COD concentration is 57~65% lower than the original, BOD5 is 55~84%, TP is 44~56%, TN has a maximum reduction of 23%, chlorophyll-a has a maximum reduction of 62%, and the largest improve of water transparency is 10cm. Those effect is obvious.4. It provided a comprehensive treatment idea in Hefei by combining water system around the city, supplying by reclaimed water and clean water, dredging and some biologic-ecological methods.