固定化藻类对污水中磷的净化能力研究

采用海藻酸钙凝胶包埋固定藻类，对人工污水进行静态模拟净化试验，研究了蛋白核小球藻、突变衣藻、鱼腥藻和双对栅藻在固定和悬浮状态下对污水中磷的净化效率以及藻类的生长特性。结果表明：固定化藻细胞比悬浮态藻细胞具有生长更趋于稳定、藻类的活性保持时间更长的优势。4种藻类中，小球藻和鱼腥藻在污水中的生长状况更好，较适宜采用海藻酸钙凝胶包埋固定化技术。在固定状态下，蛋白核小球藻、突变衣藻、鱼腥藻和双对栅藻对磷的去除率在第3天达到最大值，分别为39.8%、28.3%、33.0%和30.7%。因此，小球藻更适用于去除污水中的磷，是较为优良的除磷藻种。

Phosphorus removal ability of immobilized algae from waste water

Removal of phosphorus from synthetic wastewater by three species of green algae and one specie of blue-green alga ( Chlorella pyrenoidosa, Chlamydomonas mutabilis, Anabaena sp. and Scenedesmus bijuga ) was investigated using calcium alginate embedded algae and also experiments on algae growth in synthetic wastewater were conducted. Resuhs showed that high viability and a longer lag period were observed with immobilized cells than those with the suspending cells. The growth stabilities of immobilized Chlorella pyrenoidosa and Anabaena sp. were better than that of the others in synthetic wastewater. The removal efficiency of phosphorus by immobilized ChloreUa pyrenoidosa, Chlamydomonas muta-bilis, Anabaena sp. and $cenedesmus bijuga which was 39.8% , 28.3% , 33.0% and 30.7% respectively reached the maximum on the 3th day. It was indicated that immobilization of Chlorella pyrenoidosa was an effective way to reduce phosphorus in wastewater treatment.