OGO工艺反硝化吸磷试验分析

Denitrifying Phosphorus Removal Affected by Different Electron Acceptors

论文根据同心圆活动导流墙工艺(简称OGO工艺)缺氧段处理结果,取厌氧释磷的活性污泥为研究对象,进行批次试验。验证了缺氧段的反硝化除磷现象,并研究了不同电子受体对反硝化除磷过程的影响。试验结果表明:在缺氧段电子受体起始浓度对反应过程影响很大,试验中硝酸盐质量浓度为50.04mg.L-1、亚硝酸盐氮质量浓度为31.07mg.L-1时吸磷量和吸磷速率都比较高。低于该值时,吸磷量和吸磷速率随着电子受体质量浓度的提高而增加。在保证有足够的硝酸盐电子受体的情况下(NO3--N≥50.04mg.L-1),反硝化吸磷速率基本不受硝酸盐浓度的影响。而当亚硝酸盐浓度高于55.72mg.L-1时,将会对缺氧吸磷产生严重的抑制作用。

In order to obtain a better insight into anoxic phosphorus uptake in the OGO process, the effects of vari- ous types of electron acceptors on the anoxic phosphorus uptake were investigated. Then, experimental tests were carried out using the activated sludge cultivated in OGO process. The results indicate that（1） anoxic phosphorus up- take occurs in OGO process; （2） the initial mass concentration of the electron acceptor has great effect on the reaction; （3） the amount and rate of phosphorus uptake reach their maximum values when the mass concentrations of NO2^--N and NO2^--N are respectively 50.04 and 31.07 mg ·L^-1 ; （4） the anoxie phosphate uptake was rarely influenced by the concentration of nitrate with the adequate nitrate as electron acceptors. ; （5） the anoxic phosphorous uptake was entirely inhibited when the concentration of NO2^- -N was higher than 55.72 mg· L^-1.