文献类型：期刊文献

中文题名：A^2/O与ALO工艺处理低C/N值城市污水的对比

英文题名：Comparison between A^2/O and ALO Processes for Treatment of Municipal Wastewater with Low C/N Ratio

作者：邱兆富[1];王晓霞[1];吕树光[1];周琪[2];杨殿海[2]

机构：[1]华东理工大学资源与环境工程学院国家环境保护化工过程环境风险评价与控制重点实验室,上海200237;[2]同济大学污染控制与资源化研究国家重点实验室,上海200092

年份：2012

卷号：28

期号：15

起止页码：12

中文期刊名：中国给水排水

外文期刊名：China Water & Wastewater

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(51108181)

语种：中文

中文关键词：A2/O工艺;ALO工艺;城市污水;低溶解氧;短程硝化反硝化

外文关键词：A2/O process; ALO process; municipal wastewater; low DO; short-cut nitri-

摘要：为解决A2/O工艺处理低碳氮比值城市污水时存在的脱氮除磷效果差的问题,将中试规模A2/O工艺的缺氧区及好氧区80%的容积改为低氧区,而其厌氧区按缺氧区运行,该缺氧/低氧/好氧工艺称为ALO工艺。当水温为19～23℃、进水COD为148.4 mg/L、HRT为8 h时,控制低氧区的DO为0.2～0.6 mg/L,在ALO工艺中实现了短程硝化反硝化。当进水C/N值为3.5左右时,ALO工艺对TN的去除率为73.8%,对TN和TP的去除率比A2/O工艺分别高出30%和20%以上,但其消耗的空气量仅为A2/O工艺的50%。ALO工艺的活性污泥存在轻微的非丝状菌膨胀。
To improve the low efficiency of nitrogen and phosphorus removal from municipal wastewater with low C/N ratio, a pilot-scale anaerobic-anoxic-oxic （A^2/O） process was modified to an- oxic-low oxygen-oxic （ALO） process. The anoxic tank and the oxic tank （80% of volume） of the A^2/O process were operated at low oxygen levels. The anaerobic tank was changed into anoxic condition. When the influent COD was 148.4 mg/L, HRT was 8 h, and wastewater temperature was 19 to 23 ℃, short- cut nitrification and denitrification in ALO process was achieved by controlling DO concentration in the low oxygen tank at between 0.2 and 0.6 mg/L. As the influent C/N ratio was about 3.5, the TN removal rate of ALO process was up to 73.8% , and the removal efficiencies of TN and TP were above 30% and 20% higher than those in the A2/O process, respectively. The volume of air consumed by the ALO process was 50% of that by the A2/O process. However, non-filamentous activated sludge bulking was found in the ALO process.