CAJ | 학술논문

采用高氨氮人工配水和序批式反应器,在限氧(0.2~0.3mg/L)条件下,研究了进水氨氮负荷、游离氨和游离亚硝酸对氨氮转化率、亚硝化率和亚硝氮生成速率的影响及游离氨对氨氧化菌的基质抑制动力学.结果表明,在进水氨氮负荷逐步提升过程中,由于高浓度游离氨的抑制作用及负荷冲击的影响,亚硝化效果易出现波动,且负荷越高,亚硝化性能恢复的时间越长.反应系统最终可达到的氨氮容积负荷为3.60kg/(m3·d),亚硝氮生成速率为2.98kg/(m3·d),亚硝化率始终维持在85%左右.反应体系中较高的游离氨浓度(24.4~85.8mg/L)和低浓度溶解氧是维持亚硝化工艺稳定运行的主要因素.游离氨对氨氧化菌的抑制动力学符合Haldane模型,拟合得到最大氨氧化速率为6.71gN/(gVSS·d),游离氨半饱和常数和抑制常数分别为3.2mg/L和27.8mg/L.
채용고안담인공배수화서비식반응기,재한양(0.2~0.3mg/L)조건하,연구료진수안담부하、유리안화유리아초산대안담전화솔、아초화솔화아초담생성속솔적영향급유리안대안양화균적기질억제동역학.결과표명,재진수안담부하축보제승과정중,유우고농도유리안적억제작용급부하충격적영향,아초화효과역출현파동,차부하월고,아초화성능회복적시간월장.반응계통최종가체도적안담용적부하위3.60kg/(m3·d),아초담생성속솔위2.98kg/(m3·d),아초화솔시종유지재85%좌우.반응체계중교고적유리안농도(24.4~85.8mg/L)화저농도용해양시유지아초화공예은정운행적주요인소.유리안대안양화균적억제동역학부합Haldane모형,의합득도최대안양화속솔위6.71gN/(gVSS·d),유리안반포화상수화억제상수분별위3.2mg/L화27.8mg/L.
The effects of ammonium nitrogen loading rate,free ammonia and free nitrous acid on ammonium nitrogen removal efficiency,nitrite accumulation ratio and nitrite nitrogen accumulation rate were studied with a sequencing batch reactor under limited oxygen concentration(0.2—0.3mg/L). The substrate inhibition kinetics of ammonium oxidizing bacteria was also analyzed. The fluctuations of performance of reactor were observed due to the influence of shock loading and inhibition of high free ammonia when ammonium nitrogen loading was gradually improved. The recovery process was slower with higher load. Ammonium nitrogen loading rate of 3.60kg/(m3·d) and nitrite nitrogen accumulation rate of 2.98kg/(m3·d) were attained with nitrite accumulation ratio maintained at around 85%. High free ammonia(24.4—85.8mg/L)and limited dissolved oxygen are the main factors to achieve stable partial nitrification. The Haldane model was used to describe the substrate inhibition of partial nitrification and the results show that the maximum specific ammonium nitrogen oxidizing rate is 6.71gN/(gVSS·d). Affinity constant and inhibition constant for free ammonia are 3.2mg/L and 27.8mg/L,respectively.