藻类生物膜技术脱氮除磷效果研究

利用藻类生物膜去除水体氮磷为富营养化的防治提供了1种新途径,实验室条件下研究了以巨颤藻（Oscillatoria princeps）占优势的藻类生物膜对人工合成污水、污水处理厂二级污水和富营养化湖水氮（N）、磷（P）的去除效果.结果表明,通过5 d的处理,藻类生物膜对人工合成污水、污水处理厂二级污水和富营养化湖水总氮（TN）去除率分别为57.1%、94.5%和93.8%,对总磷（TP）去除率分别为93%、73%和79%.藻类产量达到3.7～7.2　g·(m²·d)^-1;收获藻体总凯氏氮（TKN）达5.7%～7.2%,TP达0.78%～2.44%,对污水N、P的回收率分别达20%～39%和65%～82%.

Study on Efficiency of Nitrogen and Phosphorus Removal by Algal Biofilm

Cultivating algal biofilm on nitrogen (N) and phosphorus (P) in waters presents an alternative to control eutrophication. Under laboratory conditions, efficiency on nitrogen and phosphorus removal from synthetic wastewater, secondary effluent and eutrophic lake water by algal biofilm was assessed. Algal biofilm was mainly composed of blue-green algal species Oscillatoria princeps. During a 5-day treatment, for synthetic wastewater, secondary effluent and eutrophic lake water, removal rates of TN were 57.1%, 94.5% and 93.8%, respectively, removal rates of TP were 93%, 73% and 79%, respectively. The dried algal production were 3.7 - 7.2 g x m(-2)x d(-1), and the TKN and TP of algal biomass were 5.7% - 7.2% and 0.78% - 2.44%, respectively. Recovery of nutrients in harvested algal biomass accounted for about 20% - 39% for N and 65% - 82% for P.