饮用水净化工艺中磷的去除研究

Studies on the removal of phosphorus in drinking water purification technology

利用一种新的微生物学分析方法,研究了原水中微生物可利用磷(MAP)以及总磷(TP)、溶解性正磷酸盐(SRP)在净水工艺中的去除情况.结果表明,生物预处理、生物活性炭及常规的混凝沉淀砂滤工艺均使水中的MAP、TP及SRP大大降低;生物预处理和生物活性炭对水中MAP的去除效率高于对TP的去除效率;常规处理对原水中MAP的去除率超过90%,TP的去除率在80%以上.臭氧氧化对水中TP和SRP的影响不大,但是使MAP增加.试验原水经过净水处理后,水中可供细菌利用的磷源降低到很低的水平,说明处理后的水中磷源可能成为水中细菌生长的限制因子.

The removal situation of MAP (microbially available phosphorus), TP (total phosphorus) and SRP (soluble reactive phosphorus) of raw water in the water purification technology was studied with a new microbiological analysis technique. The result showed that biological pretreatment, biological activated carbon and conventional technology(coagulation, sedimentation and sand-filtration) could remove greatly MAP, TP and SRP in water. The removal efficiency of MAP was higher than that of TP in the process of biological pretreatment and biological activated carbon. Over 90% of MAP and 80% of TP were removed in the conventional treatment. Ozonation did not affect TP and SRP obviously but did increase MAP. MAP source in the treated raw water decreased to very low level, which indicated that the phosphorus source in the treated water might be the limitation factor of bacterial in water.