CAJ | 학술논문

通过改变进水硝酸盐浓度,考察了硝酸盐对缺氧和好氧两种不同氧环境下的磷酸盐还原系统除磷效能的影响.试验结果表明,硝酸盐对两种氧环境下磷酸盐还原系统的除磷效能影响显著.当进水硝酸盐浓度为105～160 mg/L时有利于缺氧条件下的磷酸盐还原.而进水硝酸盐对好氧条件下的磷酸盐还原产生显著抑制作用,并且两者存在显著的负相关(R~2=0.982 7).这种差异主要是由于两种不同氧环境下,硝酸盐对微环境构造的影响不同而造成的.同时,不同浓度的进水硝酸盐还会影响反应器内的pH值,进而影响磷酸盐还原进程.结果表明,偏碱性(pH8左右)有利于两种氧环境下的磷酸盐还原.
통과개변진수초산염농도,고찰료초산염대결양화호양량충불동양배경하적린산염환원계통제린효능적영향.시험결과표명,초산염대량충양배경하린산염환원계통적제린효능영향현저.당진수초산염농도위105～160 mg/L시유리우결양조건하적린산염환원.이진수초산염대호양조건하적린산염환원산생현저억제작용,병차량자존재현저적부상관(R~2=0.982 7).저충차이주요시유우량충불동양배경하,초산염대미배경구조적영향불동이조성적.동시,불동농도적진수초산염환회영향반응기내적pH치,진이영향린산염환원진정.결과표명,편감성(pH8좌우)유리우량충양배경하적린산염환원.
The influence of influent nitrate on phosphorus removal efficiency of phosphate reduction systems under anoxic and aerobic condition was studied by changing the concentration of influent nitrate. It was shown that nitrate had significant influence on phosphorus removal efficiency of phosphate reduction system under anoxic and aerobic condition. When influent nitrate concentration was between 105 mg/L and 160 mg/L, it was favorable to anoxic phosphate reduction. However, influent nitrate had a remarkable inhibition on aerobic phosphate reduction, and there was a significant negative correlation between them (R~2 =0. 982 7). The difference on phosphorus removal efficiency was mainly due to different influence of nitrate on microenvironment structure under various oxygen environments. Moreover, different concentrations of influent nitrate also affected the pH value in the reactor, which can affect phosphate reduction process. It was found that slight alkaline (pH around 8) was favorable for phosphate reduction under anoxic and aerobic condition.