生物除磷的电场强化作用及其规律研究

本课题通过对比试验对生物除磷的电场强化作用及其规律进行了初步研究,结果表明,在试验条件下(电流密度:i=0．04-0．08mA／cm2),无论那个反应时段(厌氧段、好氧段)施加电场,对提高、稳定生物除磷效率都有积极的作用;对比研究发现,在相同的电流密度下,好氧段电场强化对除磷效果的促进作用更明显,在最佳工况(好氧段强化,i=0．08mA／cm2),电场强化反应器TP平均去除率高达92％,比对照组普通生物反应器高出15％。另外,试验分析了剩余污泥的含磷量,数据显示,电场强化生物反应器剩余污泥含磷率达5．04％(干重),比对照组普通生物反应器高0．68％,进一步表明了电场可强化活性污泥的超量吸磷能力。

The Analysis of Aggrandizement of Electric Field in Biological Dephosphorization

The aggrandizement of electric field of biological dephosphorization was studied in this paper. The obtained results demonstrated that in both reaction periods, the electric field contributed to the efficiency and stability of dephosphorization. The contrasting investigation showed that at the same current density, aggrandizement of electric field in aerobic period could obtain better results, and under the optimal condition(i=0.08mA/cm2), the average removal ratio of total phosphorus was 92% , 15% higher than that of ordinary bio-reactor. The results also showed that phosphorus content of dry sludge in enhancing reactor of electric field was 5.04% , 0.68% higher than that of ordinary bio-reactor, which indicated further that the electric field could enhance its ability of dephosphorization.