CAJ | 학술논문

采用模拟含氨废水和气升循环式好氧反应器研究了短程硝化 (partial nitrification,PN) 工艺的高效性能.试验结果表明,气升式短程硝化工艺具有很高的容积效率,在30℃、进水氨氮浓度358.5～942.3 mg·L~(-1)时,反应器水力停留时间可缩至0.86～2.00 h,反应器每天周转次数高达12～28次,平均容积去除速率高达5.5 kg N·m-3·d~(-1),处于文献报道的最高水平范围.该工艺具有超常的运行稳定性,在进水基质浓度、进水流量和pH波动的情况下,氨氮去除率、出水氨氮浓度和亚硝氮积累率的相对标准偏差分别为3.1%～16.8%,4.3%～26.5%和0.4%～5.3%.该工艺的高效稳定性可归因于气升循环式反应器的强污泥持留能力和短程硝化污泥的高反应活力.系统内持留的污泥浓度高达4.0～5.2 g VSS·L~(-1),动力学试验测得的最高比污泥活性达到2.71 g N·(g VSS)~(-1)·d~(-1).
채용모의함안폐수화기승순배식호양반응기연구료단정초화 (partial nitrification,PN) 공예적고효성능.시험결과표명,기승식단정초화공예구유흔고적용적효솔,재30℃、진수안담농도358.5～942.3 mg·L~(-1)시,반응기수력정류시간가축지0.86～2.00 h,반응기매천주전차수고체12～28차,평균용적거제속솔고체5.5 kg N·m-3·d~(-1),처우문헌보도적최고수평범위.해공예구유초상적운행은정성,재진수기질농도、진수류량화pH파동적정황하,안담거제솔、출수안담농도화아초담적루솔적상대표준편차분별위3.1%～16.8%,4.3%～26.5%화0.4%～5.3%.해공예적고효은정성가귀인우기승순배식반응기적강오니지류능력화단정초화오니적고반응활력.계통내지류적오니농도고체4.0～5.2 g VSS·L~(-1),동역학시험측득적최고비오니활성체도2.71 g N·(g VSS)~(-1)·d~(-1).
The partial nitrification (PN) process was investigated at 30℃ in an air-lift circulation (ALC) reactor fed with simulated wastewater.The results proved that it was a highly-efficient process for ammonia removal.The turnover of the ALC reactor was 12-28 times per day with hydraulic retention time between 0.86 h and 2.00 h.When influent concentrations of ammonia were increased from 358.5 to 942.3 mg·L~(-1),the average volumetric ammonia removal rate reached as high as 5.5 kg N·m-3·d~(-1),which was at the top level reported in the literature.During the operation,the relative standard deviation of effluent substrate concentration,ammonia removal efficiency and nitrite accumulation was 4.3%-26.5%,3.1%-16.8% and 0.4%-5.3%,respectively,in spite of fluctuation of influent concentration,flow rate or pH.The stability of process performance could be attributed to both the efficient retention of sludge (4.0-5.2 g VSS·L~(-1)) and the high specific activity of biomass (2.71 g N·(gVSS)~(-1)·d~(-1) determined from the kinetic study).