硝酸盐电子受体反硝化同时除磷试验分析

THE ANALYSIS OF SIMULTANEOUS DENITRIFYING AND DEPHOSPHORIZATION WITH NITRATE AS ELECTRONIC RECEIVER

经研究发现AAA SBR系统中的活性污泥可以利用硝酸盐作为电子受体进行缺氧吸磷并同时发生反硝化脱氮。试验利用“双泥”系统进一步探讨了污水生物反硝化同时除磷的可能性 ,结果表明 :“双泥”系统的“双重”吸磷以及内碳源反硝化除磷方式可以使生物处理出水磷酸盐浓度趋近于零 ,TP≤ 0 2 3mg L、NH3 N≤ 0 5mg L、TN≤ 8mg L、CODCr≤2 5mg L。

It was found through test that the activated sludge with nitrate as electronic receiver could absorb phosphorus at the condition of anoxia and remove nitrogen through denitrification at the same time.The test ulteriorly discussed the possibility of simultaneous denitrifying and dephosphorization by using the “double sludge” system.The results show that the concentration of phosphate tends to zero,TP≤0.23 mg/L, NH 3-H≤0.5 mg/L,TN≤8 mg/L and COD Cr≤25 mg/L in effluent by using“double” phosphorus absorbability and denitrifying of inner carbon source in the “double sludge” system.