| 连续流好氧颗粒污泥系统处理低COD/N实际生活污水的工艺优化 |
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| 引用本文： | 鲁磊,信欣,鲁航,朱辽东,谢思建,武勇.连续流好氧颗粒污泥系统处理低COD/N实际生活污水的工艺优化[J].环境科学,2015,36(10):3778-3785. |
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| 作者姓名： | 鲁磊 信欣 鲁航 朱辽东 谢思建 武勇 |
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| 作者单位： | 成都信息工程大学资源环境学院, 成都 610225;成都信息工程大学资源环境学院, 成都 610225;成都信息工程大学资源环境学院, 成都 610225;成都信息工程大学资源环境学院, 成都 610225;成都信息工程大学资源环境学院, 成都 610225;成都信息工程大学资源环境学院, 成都 610225 |
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| 基金项目： | 四川省科技支撑计划项目(2013GZ0067);大气环境模拟与污染控制四川省高校重点实验室开放基金项目(ZZKT2014003) |
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| 摘 要： | 在连续流合建式反应器中接种成熟好氧颗粒污泥处理低碳氮比(COD/N)的实际生活污水,研究了曝气量和水力停留时间(hydraulic retention time,HRT)对连续流好氧颗粒污泥系统脱氮除磷和颗粒污泥稳定性的影响.结果表明,当曝气量为300 m L·min-1(表观气速为1.2 cm·s-1)、HRT为7.5 h时,反应器对化学需氧量(chemical oxygen demand,COD)、总氮(total nitrogen,TN)和总磷(total phosphorus,TP)去除率达到最高,分别为76.34%、51.23%和53.70%.整个系统在此条件下能够稳定运行,污泥浓度(mixed liquor suspended solids,MLSS)为2 000 mg·L-1左右,污泥体积指数(sludge volume index,SVI)保持在50 m L·g-1以下,好氧颗粒污泥形态完整,沉降性能良好.低COD/N的实际生活污水促进了好氧颗粒污泥胞外多聚物(extracellular polymeric substance,EPS)的增长,蛋白质(protein,PN)和多聚糖(polysaccharide,PS)的比值高达17.9,相对于PS,PN对颗粒污泥的稳定性有更大的促进作用.
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| 关 键 词： | 连续流 好氧颗粒污泥 低COD/N 实际生活污水 工艺优化 |
| 收稿时间： | 2015/3/25 0:00:00 |
| 修稿时间： | 2015/5/26 0:00:00 |
Process Optimization of Aerobic Granular Sludge Continuous-Flow System for the Treatment of Low COD/N Ratio Sewage |
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| LU Lei,XIN Xin,LU Hang,ZHU Liao-dong,XIE Si-jian and WU Yong.Process Optimization of Aerobic Granular Sludge Continuous-Flow System for the Treatment of Low COD/N Ratio Sewage[J].Chinese Journal of Environmental Science,2015,36(10):3778-3785. |
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| Authors: | LU Lei XIN Xin LU Hang ZHU Liao-dong XIE Si-jian and WU Yong |
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| Institution: | College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China |
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| Abstract: | The mature aerobic granular sludge (AGS) was inoculated in a continuous-flow joint constructor reactor to treat low chemical oxygen demand/nitrogen (COD/N) ratio sewage.The effects of aeration intensity and hydraulic retention time (HRT) on the denitrification and phosphorus removal efficiencies and the granular sludge stabilization were investigated.When the aeration intensity was 300mL·min-1 (superficial air upflow velocity of 1.2 cm·s-1) and the HRT was 7.5 h, the average removal efficiencies of COD, TN and TP were 76.34%, 51.23% and 53.70%, respectively.The mixed liquor suspended solids (MLSS) was only about 2000 mg·L-1, the sludge volume index (SVI) was below 50 mL·g-1, and the AGS exhibited complete forms and good settling performances.Additionally, the low COD/N ratios sewage could promote the production of extracellular polymeric substances (EPS) of AGS, and the PN proteins in EPS played a pivotal role in the maintenance of AGS stabilization. |
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| Keywords: | continuous-flow aerobic granular sludge low COD/N ratio actual sewage process optimization |
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