循环式活性污泥工艺协同处理榨菜废水与城镇污水脱氮效果  

Nitrogen removal efficiency of co-processing pickle wastewater and municipal sewage by cyclic activated sludge system(CASS) process

作　　者：何强[1] 丁文静[1] 司马卫平[1,2] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]四川理工学院建筑工程学院,自贡643000

出　　处：《环境工程学报》2013年第4期1331-1335,共5页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07315-004)

摘　　要：利用CASS工艺协同处理高盐高氮榨菜有机废水和生活污水,针对协同处理碳源不足问题,提出以榨菜废水和甲醇作为碳源的两种碳源投加方案,对比分析了CASS工艺在运行周期为8 h、排水比为30%、回流比为100%、预处理后的榨菜废水掺入比为20%的条件下,分别以榨菜废水和甲醇补充碳源及不外加碳源3种情况的脱氮效果。实验结果表明,不外加碳源时,协同处理进水C/N小于3∶1,系统脱氮效果差,出水总氮不达标;以榨菜废水和甲醇为碳源提高C/N至4∶1～5∶1时,系统脱氮效果提高,出水总氮满足GB18918-2002一级B标排放标准;盐度的变化对微生物活性产生的抑制作用,当盐度升高0.1%±0.02%时,微生物系统恢复时间为10 d,而当盐度降低0.1%±0.02%时,微生物系统恢复时间为15 d。Two methods of adding carbon sources with pickle wastewarer anu methanol were solve the problem of the lack of carbon source on co-processing organic wastewater with high concentration of salt and nitrogen and municipal sewage by CASS process, and it was analyzed comparatively on the nitrogen removal efficiency under the three conditions of adding pickle wastewater, adding methanol and adding nothing when operating the reactor under the operation condition that the operating time was 8 h, drainage ratio was 30% , recycle ratio was 100% and the ratio of adding pickle wastewater was 20% The results indicated that when the influent C/N ratio of co-processing was less than 3：1 without adding carbon source, the removal efficiency of TN was poor in the system and the effluent concentration of TN could not meet the discharge standard; when C/N ratio was raised to 4：1 -5：1 by adding pickle wastewater or methanol as carbon source, the removal efficiency of TN became better and the effluent concentration of TN could meet the first B class discharge standards of urban sewage treatment factory（GB18918-2002） ; the variations of salinity had restaining effect on the microorganism activity. When the salinity rose by 0.1% ±0.02% , the microorganism system needed 10 days to recover; while the salinity reduced by 0.1% ±0.02% , the microorganism system needed 15 days to recover.

关 键 词：榨菜废水 协同处理 脱氮 循环式活性污泥 

分 类 号：X703.1[环境科学与工程—环境工程]