高效藻类塘对小城镇养殖废水净化效能的影响

目的]探索高效藻类塘中藻类、曝气和底泥对小城镇养殖废水净化效能的影响。方法]设置4个独立人工池塘作对比试验,通过控制试验塘中的藻类浓度、底泥及曝气程度,测定养殖废水中的还原性物质、氮和磷的变化量,进而比较藻类、底泥和曝气对废水净化效能的影响。结果]高效藻类塘对还原性物质、氮和磷的去除率分别达到88.3%、69.2%和59.7%,而普通塘对其去除率分别仅有48.0%、43.4%和22.8%。藻类对TP的去除影响最为明显,其次是对COD,对TN的影响最弱;曝气对COD代表的还原性物质的去除率影响最大,其次是对TN的降低,对TP的影响最弱;底泥对TP的去除影响极为显著,其次是对TN,而对COD的降低影响最弱。结论]高效藻类塘中藻类、曝气和底泥均对养殖废水的净化产生较大影响。

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.