Study on Effect of Efficient Algae Pond on Purification Performance of Aquaculture Wastewater in Small Town

[Objective] The study aimed to explore the effects of algae,aeration and sediment in the efficient algae pond on the purification performance of the aquaculture wastewater in small town.[Method] In the test,4 independent artificial ponds were set up as the contrast experiment,and through controlling the algae concn.,sediment and aeration degree,the change of reducible substance,nitrogen and phosphorus in the aquaculture wastewater were determined to compared the effects of algae,aeration and sediment on the purification performance of the aquaculture wastewater.[Result] In the efficient algae pond the removal rate of nitrogen and phosphorus reached 88.3%,69.2% and 59.7% resp.,but in the general pond their removal rate were only reached 48.0%,43.4% and 22.8% resp.The effect of algae on the removal rate of TP was most obvious,that on COD was next and that on TN was weakest.The effect of aeration on the removal rate of the reducible substance with COD as the type was most,that on the decrease of TN was next and that on TP was weakest.The effect of sediment on the removal rate of TP was extremely obvious,that on TN was next and that on the decrease of COD was weakest.[Conclusion] The algae,aeration and sediment in the efficient algae pond could have the greater effects on the purification performance of the aquaculture wastewater.