摘要
研究了基于缺氧吸磷理论开发出的A2N反硝化除磷脱氮新工艺对生活污水氮、磷的去除,重点考察了不同COD/TN、投碳方式及碳源对DNPAOS反硝化吸磷和脱氮的影响.试验结果表明:当进水COD/TN在3 94～7变化时,反硝化除磷较好,除磷率稳定在87 03%～92 95%,脱氮率从80 99%提高到了92 70%;而当COD/TN达到9 6以后,系统脱氮效果稳定在92%以上,除磷率却降至74%以下,TP去除量中反硝化吸磷比率下降,好氧吸磷比率升高;将外碳源投加在缺氧段,只能优先支持反硝化脱氮反应,而对缺氧吸磷有抑制作用.因此,理想的反硝化除磷环境为外碳源(电子供体)和NO3-(电子受体)不能同时存在于一个体系中.A2N双泥系统的建立有利于除磷、脱氮的稳定和高效.
Investigating the nitrogen and phosphorus removal situation of domestic sewage using the A2N process which was based on the theory of denitrifying phosphorus removal. The experiment puts great emphasis on the effect of different carbon loadings, carbon sources and filing carbon modes on the denitrifying dephosphorus efficiency. The experiment result shows: when COD/TN fluctuates from 3.94 to 7, the denitrifying dephosphorus removal is effective. The total phosphorus removal efficiency changed between 87.03 and 92.95%, simultaneously nitrogen removal efficiency improved from 80.99% to 92.70%. However, when COD/TN was higher than 9.6, the nitrogen removal efficiency was higher than 92%, but the total phosphorus removal efficiency declined (74%), anoxic dephosphorus ratio was reduced and the aeration dephosphorus ratio rose of overall TP removal quantity. Putting the carbon source in the anoxic reactor was in favor of denitrifying but did harm to anoxic de-phosphorus. Simultaneous presence of carbon and nitrate would be detrimental to phosphorus removal. The two-sludge system was beneficial to improving the system's efficiency and stability.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2004年第8期1046-1049,共4页
Journal of Harbin Institute of Technology
基金
国家高技术研究发展计划资助项目(2003AA601010)
国家自然科学基金重点资助项目(50138010).
