NaCl盐度对SBR工艺短程硝化反硝化的影响  

Effect of NaCl Salinity on Short-cut Nitrification and Denitrification Using SBR

作　　者：张兰河[1,2] 伏向宇[1] 杨涛[1] 倪颖[3] 张万友[1] 

机构地区：[1]东北电力大学化学工程学院,吉林吉林132012 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090 [3]吉林燃料乙醇有限责任公司,吉林吉林132012

出　　处：《北京工业大学学报》2013年第2期280-286,共7页Journal of Beijing University of Technology

基　　金：城市水资源与水环境国家重点实验室开放基金资助项目(QA201013);吉林省科技发展计划应用基础研究项目(20090599)

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.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 NO2--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, 450-550mg/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.

关 键 词：短程硝化反硝化 序批式活性污泥法 冲击负荷 亚硝态氮 

分 类 号：X703.1[环境科学与工程—环境工程]