摘要
采用好氧MBR工艺处理垃圾渗沥液,系统考察进水氨氮负荷、水力停留时间(HRT)和温度对MBR硝化污泥中氨氧化细菌(AOB)与亚硝酸化细菌(NOB)数量及其氧化活性的影响。结果表明,当进水氨氮浓度从300mg/L逐渐上升到600mg/L时,硝化污泥中AOB从6.0×104个/mL增至6.0×105个/mL,NOB从3.5×107个/mL升至6.0×108个/mL;当HRT从1d增加为2d时,AOB的数量约增加1倍,NOB的数量增加很小。当反应温度低于15℃时,AOB与NOB的数量基本不变,仅NOB的比硝化速率有所降低,表明经渗沥液驯化的AOB的耐温度抑制能力有所增强。
The influences of influent ammonia concentration, hydraulic retention time （HRT） and temperature on the population and oxidizing ability of ammonia oxidizing bacteria （AOB） and nitrite oxidizing bacteria （NOB） in waste leachate treatment were investigated using aerobic membrane bioreactor. The results showed that when the influent ammonia concentration was raised from 300 to 600 mg/L gradually, the number of AOB and NOB increased from 6. 0×104/mL to 6. 0×105/ mL and from 3. 5× 107/mL to 6. 0×108/mL, respectively. When HRT prolonged from 1 day to 2 days, the number of AOB rose about 2 times, whereas the number of NOB increased slightly. At the temperature of below 15 ℃, no any change was observed in the numbers of AOB and NOB,but the nitrite oxidation activity of NOB dropped , implying that the tolerance of AOB to low temperature was enhanced during acclimation period.
出处
《环境卫生工程》
2010年第3期15-17,20,共4页
Environmental Sanitation Engineering
基金
深圳市科技计划项目深港联合资助(08LH-04)
厦门市科技计划项目(3502Z20083001
3502Z20073009)
关键词
垃圾渗沥液
好氧MBR
氨氧化细菌
亚硝酸化细菌
waste leachate
aerobic membrane bioreactor
ammonia oxidizing bacteria
nitrite oxidizing bacteria
