| 连续进水对好氧颗粒污泥稳定维持的影响 |
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| 引用本文： | 高景峰,苏凯,陈冉妮,张倩,王金惠,彭永臻.连续进水对好氧颗粒污泥稳定维持的影响[J].环境科学学报,2010,30(7):1377-1383. |
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| 作者姓名： | 高景峰 苏凯 陈冉妮 张倩 王金惠 彭永臻 |
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| 作者单位： | 北京工业大学,环境与能源工程学院,北京,100124 |
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| 基金项目： | 国家自然科学基金面上项目 |
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| 摘 要： | 为了考察连续进水对好氧颗粒污泥稳定维持的影响,在SBR反应器中接种成熟的好氧颗粒污泥,采用连续进水、间歇出水的方式运行.在反应器运行过程中,部分好氧颗粒污泥解体,完整存在的好氧颗粒污泥表面附着生长树枝状污泥和少量丝状菌.SVI在最初的13d内逐步上升,随后趋于稳定.同时,考察了好氧颗粒污泥在连续进水运行过程中EPS含量的变化以及EPS的空间分布变化:胞外多糖的含量在运行过程中呈下降趋势;胞外蛋白的含量整体呈先上升后下降的趋势;反应器运行15d后,胞外蛋白和胞外多糖的含量趋于稳定.连续进水运行30d后,EPS空间分布最大变化是β-D吡喃葡萄糖,它大量聚集在颗粒的表层及颗粒中伸出的树枝状污泥及丝状菌的表层.本研究表明,连续进水的运行方式不利于好氧颗粒污泥的稳定维持,底物浓度梯度为好氧颗粒污泥稳定维持的重要因素之一;EPS的分泌量以及空间分布对好氧颗粒污泥的形成及其稳定维持起着至关重要的作用.
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| 关 键 词： | 好氧颗粒污泥 连续进水 稳定维持 胞外多聚物 |
| 收稿时间： | 2009/10/20 0:00:00 |
| 修稿时间： | 2009/11/18 0:00:00 |
The effect of continuous feeding on the stability of aerobic granular sludge |
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| GAO Jingfeng,SU Kai,CHEN Ranni,ZHANG Qian,WANG Jinhui and PENG Yongzhen.The effect of continuous feeding on the stability of aerobic granular sludge[J].Acta Scientiae Circumstantiae,2010,30(7):1377-1383. |
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| Authors: | GAO Jingfeng SU Kai CHEN Ranni ZHANG Qian WANG Jinhui and PENG Yongzhen |
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| Institution: | College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124,College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124,College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124,College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124,College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124 and College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124 |
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| Abstract: | Fine/Ultrafine particulate matter concentration and size distribution,traffic flow rate,air speed and meteorological parameters were monitored in a bus-only road tunnel in Australia for 4 consecutive days. Emission factors (EF) for all particle number (PN) size ranges for both diesel and compressed natural gas (CNG) buses were developed by the Least Mean Square method using the mix ratio of buses recorded at 10 minute intervals. The PN EFfor mixed traffic flow was 2.61×1014 p·veh-1·km-1. After multiple regression analyses of particle size distribution EFs,this study also found that diesel buses mainly emitted accumulation mode particles,while CNGbuses mostly emitted nuclei-mode particles. The total PN EFs for diesel and CNGbuses were 3.96×1014 p.veh-1·km-1 and 9.33×1013 p·veh-1·km-1,respectively. |
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| Keywords: | aerobic granular sludge continuous feeding stability extracellular polymeric substances (EPS) |
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