不同pH条件下铜对固定化小球藻除氮效果的影响

采用海藻酸钙凝胶包埋固定小球藻，对人工污水进行静态模拟净化试验，研究了不同pH条件下铜对固定化小球藻去除污水中氨氮和硝酸氮能力的影响。结果表明：有铜存在时第5天，pH为4、5、6、7、8时固定化小球藻的NH+3N的去除率相对无铜条件分别下降了4.0%、0.6%、5.9%、6.0%和4.4%，悬浮态小球藻的NH+3N的去除率分别下降了10.9%、22.4%、15.5%、14.5%和20.2%；pH为6、7、8时固定化小球藻的NO-3N的去除率相对无铜条件分别下降了4.1%、2.8%和4.2%，但pH为4、5时固定化小球藻的NO-3N的去除率却上升了0.8%和02%，在pH为4、5、6、7、8时悬浮态小球藻的NO-3N的去除率相对无铜条件则分别下降了4.4%、92%、5.3%、10.6%和10.2%。总体而言，铜抑制了小球藻的除氮能力，尤其对悬浮态小球藻的除氮能力产生了较大的抑制性，而固定化处理在一定程度上减弱了铜对小球藻除氮能力的影响。

Effects of copper at different pH on the nitrogen-removal efficiencies of immobilized Chlorella pyrenoidosa

The static simulation test for synthetic wastewater purification was carried out by using Chlorella pyrenoidosa entrapped in calcium alginate,and influence of copper at different pH on the nitrogen-removal efficiencies of immobilized Chlorella pyrenoidosa for ammonia and nitric acid-containing wastewater were also investigated.Test results showed that comparing without copper in wastewater,when copper was added,the NH+3-N removal of immobilized Chlorella pyrenoidosa in 5 days at pH=4,5,6,7,8 was reduced 4.0...