CAJ | 학술논문

为探讨pH值对硝态氮反硝化体系的影响，设定初始pH范围为4～10，对反硝化过程中NO3－‐N、NO2－‐N、TN、TOC和△TOC／△TN的变化规律、反硝化动力学以及抑制机理进行研究．结果发现：最适宜的反硝化pH值为8，过酸过碱都不利于反硝化过程的进行．在pH＝8时，反应时间最短，硝态氮的去除率为99．4％，TN的降解率为95．5％．亚硝态氮积累量在pH＜7时小于1mg／L；pH＞7时，随pH的增大而增大，最大积累率为22％．硝态氮比反硝化速率在pH＝8时最大，为2．52mgNO－x‐N／（gMLVSS·h）；亚硝态氮比反硝化速率在pH＝7时最大，为1．66mgNO－x‐N／（gMLVSS·h）．因此，反硝化最佳的pH值为7～8．
위탐토pH치대초태담반초화체계적영향，설정초시pH범위위4～10，대반초화과정중NO3－‐N、NO2－‐N、TN、TOC화△TOC／△TN적변화규률、반초화동역학이급억제궤리진행연구．결과발현：최괄의적반초화pH치위8，과산과감도불리우반초화과정적진행．재pH＝8시，반응시간최단，초태담적거제솔위99．4％，TN적강해솔위95．5％．아초태담적루량재pH＜7시소우1mg／L；pH＞7시，수pH적증대이증대，최대적루솔위22％．초태담비반초화속솔재pH＝8시최대，위2．52mgNO－x‐N／（gMLVSS·h）；아초태담비반초화속솔재pH＝7시최대，위1．66mgNO－x‐N／（gMLVSS·h）．인차，반초화최가적pH치위7～8．
In order to study the impacts of different initial pH on nitrate denitrification system, the paper set the initial pH value from 4 to 10, and studied the change rules of NO3-‐N, NO2-‐N, TN, TOC and △TOC/△TN in the denitrification process, denitrification dynamics and inhibiting mechanism of denitrification. It was found that the most optimal denitrifying condition was pH=8. The value of pH was not conducive to the denitrification process, if it was bigger or smaller. When pH=8, the reaction time was the shortest, the nitrate removal rate was 99. 4% and the maximum degradation rate of TN was 95. 5%. The accumulation of nitrite was less than 1 mg/L when pH<7, when pH>7, the nitrite accumulation rate increased with the increase of pH, the greatest accumulation rate was 22%. The maximum special denitrification rate of nitrate was 2. 52 (mg NO -x‐N)/(g MLVSS·h) when pH=8, while the maximum special denitrification rate of nitrite was 1. 66 (mg NO -x‐N)/(g MLVSS·h) when pH=7. Therefore, the optimum pH of denitrification was 7~8.