赵剑强2,3,
陈钰2,
胡博4,
马保成1
1.西安科技大学建筑与土木工程学院，西安 710054
2.长安大学环境科学与工程学院，西安 710064
3.长安大学旱区地下水与生态效应教育部重点实验室，西安 710064
4.长安大学建筑工程学院，西安 710064
基金项目: 国家自然科学基金资助项目（51778057）
西安科技大学博士（后）启动基金资助项目（2017QDJ062）
Comparison of nitrogen and phosphorus removal performances for traditional and modified A2/O process
DING Xiaoqian1,,ZHAO Jianqiang，2,3,
CHEN Yu2,
HU Bo4,
MA Baocheng1
1.School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2.School of Environmental Science and Engineering, Chang＇an University, Xi’an 710064, China
3.Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710064, China
4.School of Civil Engineering, Chang’an University, Xi’an 710064, China
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摘要:为了对比研究传统A2/O工艺和氧化沟型A2/O工艺的脱氮除磷性能，通过实验分析了2种工艺在不同水力停留时间、不同混合液回流比、不同污泥回流比、不同污泥浓度条件下的脱氮除磷效果及典型工况下的污染物去除过程。结果表明，2种工艺在大多数情况下均可实现良好的脱氮除磷性能，出水COD、NH4+-N、TN和TP等各项水质指标均可满足《城镇污水处理厂污染物排放标准》（GB 18918-2002）一级A要求。在传统A2/O工艺的缺氧段发生了反硝化除磷反应，在氧化沟型A2/O工艺中则未发生。
关键词: A2/O工艺/
改良A2/O工艺/
生物脱氮除磷/
性能对比
Abstract:In order to investigate and compare the pollutant removal effects of the traditional anaerobic/anoxic/oxic (A2/O) process and the modified A2/O process which was operated as the oxidation ditch mode, the performances of nitrogen and phosphorus removal for the two A2/O processes under different hydraulic retention times, different mixed liquor/activated sludge reflux ratios and different mixed liquor suspended solids were experimentally studied. Meanwhile, the biochemical reactions during the typical operation cycles were analyzed for both the two A2/O processes. The results showed that satisfied performances of nitrogen and phosphorus removal were achieved in both the two A2/O processes under the most of the operational conditions, the obtained COD, NH4+-N, TN and TP concentrations in effluent could meet the demands of standard A of the first class in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). Further, the anoxic denitrifying phosphorus removal reaction was observed in the conventional A2/O process, but was not observed in the modified A2/O process.
Key words:A2/O process/
modified A2/O process/
biological nitrogen and phosphorus removal/
performance comparison.
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传统和氧化沟型A2/O工艺脱氮除磷性能对比
丁晓倩1,,赵剑强2,3,
陈钰2,
胡博4,
马保成1
1.西安科技大学建筑与土木工程学院，西安 710054
2.长安大学环境科学与工程学院，西安 710064
3.长安大学旱区地下水与生态效应教育部重点实验室，西安 710064
4.长安大学建筑工程学院，西安 710064
基金项目: 国家自然科学基金资助项目（51778057） 西安科技大学博士（后）启动基金资助项目（2017QDJ062）
关键词: A2/O工艺/
改良A2/O工艺/
生物脱氮除磷/
性能对比
摘要:为了对比研究传统A2/O工艺和氧化沟型A2/O工艺的脱氮除磷性能，通过实验分析了2种工艺在不同水力停留时间、不同混合液回流比、不同污泥回流比、不同污泥浓度条件下的脱氮除磷效果及典型工况下的污染物去除过程。结果表明，2种工艺在大多数情况下均可实现良好的脱氮除磷性能，出水COD、NH4+-N、TN和TP等各项水质指标均可满足《城镇污水处理厂污染物排放标准》（GB 18918-2002）一级A要求。在传统A2/O工艺的缺氧段发生了反硝化除磷反应，在氧化沟型A2/O工艺中则未发生。
English Abstract
Comparison of nitrogen and phosphorus removal performances for traditional and modified A2/O process
DING Xiaoqian1,,ZHAO Jianqiang，2,3,
CHEN Yu2,
HU Bo4,
MA Baocheng1
1.School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2.School of Environmental Science and Engineering, Chang＇an University, Xi’an 710064, China
3.Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710064, China
4.School of Civil Engineering, Chang’an University, Xi’an 710064, China
Keywords: A2/O process/
modified A2/O process/
biological nitrogen and phosphorus removal/
performance comparison
Abstract:In order to investigate and compare the pollutant removal effects of the traditional anaerobic/anoxic/oxic (A2/O) process and the modified A2/O process which was operated as the oxidation ditch mode, the performances of nitrogen and phosphorus removal for the two A2/O processes under different hydraulic retention times, different mixed liquor/activated sludge reflux ratios and different mixed liquor suspended solids were experimentally studied. Meanwhile, the biochemical reactions during the typical operation cycles were analyzed for both the two A2/O processes. The results showed that satisfied performances of nitrogen and phosphorus removal were achieved in both the two A2/O processes under the most of the operational conditions, the obtained COD, NH4+-N, TN and TP concentrations in effluent could meet the demands of standard A of the first class in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). Further, the anoxic denitrifying phosphorus removal reaction was observed in the conventional A2/O process, but was not observed in the modified A2/O process.
