CAJ | 학술논문

在11~15℃条件下,采用序批式反应器(SBR)研究(50±5)mg/L 氨氮浓度下短程硝化的稳定性.结果表明,2种溶解氧浓度(初始 DO浓度分别为0.9~1.5,4.5~5.0mg/L)下反应器均能达到良好的稳定性和去除效果,150个周期内亚硝化率一直维持在95%以上,氨氧化率85%以上,平均SVI为35.22mL/g,2种DO水平下的平均氨氮污泥负荷分别为0.15,0.23kgN/(kgMLSS·d).当初始DO浓度为4.5~5.0mg/L时,21~23℃条件下无法实现短程硝化的稳定运行,经过42个周期亚硝化率降至70%,而31~33℃条件可以实现短程硝化的恢复并维持其稳定.经过不同温度条件下的对比分析及FISH试验研究,表明11~15℃与31~33℃均可抑制NOB的活性,从而有利于实现生活污水短程硝化的稳定运行.
재11~15℃조건하,채용서비식반응기(SBR)연구(50±5)mg/L 안담농도하단정초화적은정성.결과표명,2충용해양농도(초시 DO농도분별위0.9~1.5,4.5~5.0mg/L)하반응기균능체도량호적은정성화거제효과,150개주기내아초화솔일직유지재95%이상,안양화솔85%이상,평균SVI위35.22mL/g,2충DO수평하적평균안담오니부하분별위0.15,0.23kgN/(kgMLSS·d).당초시DO농도위4.5~5.0mg/L시,21~23℃조건하무법실현단정초화적은정운행,경과42개주기아초화솔강지70%,이31~33℃조건가이실현단정초화적회복병유지기은정.경과불동온도조건하적대비분석급FISH시험연구,표명11~15℃여31~33℃균가억제NOB적활성,종이유리우실현생활오수단정초화적은정운행.
At 11~15℃, in SBR the stability of shortcut nitrification was researched under low ammonia nitrogen (55±5mg/L). Results show that system could achieve good stability and removing effect under two kinds of the DO level (initial DO 0.9~1.5, 4.5~5.0mg/L).In 150cycles the nitrosation rate had been maintained above 95%, ammonia oxidation rate was more than 85%, and the average SVI was 35.22mL/g. At two DO average levels ammonia nitrogen removal Sludge load was 0.15, 0.23kgN/(kgMLSS·d) respectively. When the initial DO was 4.5~5.0mg/L, at 21~23℃ stable operation of the shortcut nitrification cannot be realized.Nitrosation rate fell to 70% after 42cycle.Butthe shortcut nitrificationcan be restored at 31~33℃. In this analysis and FISH test research, the activity of the NOB can be inhibited at 11~15℃ and 31~33℃ so that shortcut nitrification has a stable operation.