【摘要】 利用序批式活性污泥反应器(sequencing batch reactor,SBR)研究了NaCl盐度、水力停留时间(hydraulic retention time,HRT)和进水负荷对短程硝化反硝化的影响.结果表明,在pH、温度和溶解氧(dissolved oxygen,DO)质量浓度分别为7.5～8.5、30～35℃和0.5～1 mg/L的条件下,当NaCl盐度、进水化学需氧量(chemical oxygen demand,COD)和氨氮质量浓度分别为5.8～25.0 g/L、450～550 mg/L和35～45 mg/L时,NO2--N累积率大于50%.在NaCl盐度14.5 g/L的条件下,当HRT为6.21 h,进水中每天1 kg悬浮物中所含的CDD和氨氮量分别为5.03×10-2和2.24×10-3kg时,亚硝酸盐累积率高于99%.高盐环境下控制HRT、有机负荷与氨氮负荷可实现短程硝化反硝化,实现短程硝化的耐盐极限为25 g/L.更多还原

【Abstract】 The effect of NaCl salinity,hydraulic retention time,and influent loading on short-cut nitrification and denitrification was investigated using sequencing batch reactor.Results show that the accumulation rate of NO-2-N is higher than 50% when NaCl salinity,pH,temperature,dissolved oxygen,influent chemical oxygen demand and concentration of ammonia nitrogen are 5.8-25.0 g/L,7.5-8.5,30-35 ℃,0.5-1 mg/L,450-550 mg/L,and 35-45 mg/L,respectively.Furthermore,nitrite accumulation rate is higher than 99% when NaCl salinity,HRT,organic loading and ammonia nitrogen loading daily of 1 kg suspended solids contained are 14.5 g/L,6.21 h,5.03×10-2 kg and 2.24×10-3 kg,respectively.Therefore,shortcut nitrification and denitrification can be achieved by controlling HRT,organic loading and ammonia nitrogen loading at high concentration of NaCl.The limiting concentration of NaCl for nitrosobacteria is up to 25 g/L.更多还原