| 不同泥龄MBR中溶解性微生物代谢产物对膜污染的影响 |
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| 引用本文： | 李姗, 段亮, 周北海, 宋永会, 田园. 不同泥龄MBR中溶解性微生物代谢产物对膜污染的影响[J]. 环境工程学报, 2015, 9(6): 2731-2738. doi: 10.12030/j.cjee.20150631 |
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| 作者姓名： | 李姗 段亮 周北海 宋永会 田园 |
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| 作者单位： | 1. 北京科技大学土木与环境工程学院, 北京 100083; 2. 中国环境科学研究院城市水环境科技创新基地, 北京 100012; 3. 中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083 |
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| 基金项目： | 国家自然科学基金资助项目(51108437) |
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| 摘 要： | 通过4套平行运行的小试膜生物反应器(membrane bioreactor,MBR)研究了不同泥龄下溶解性微生物代谢产物(soluble microbial products,SMP)对膜污染的影响.以多糖、蛋白质表征SMP的含量,并通过三维荧光光谱(EEM)、分子量分布(MW)、红外光谱(FTIR)及扫面电镜-能谱分析(SEM-EDX)技术分析了不同泥龄下SMP的变化.结果表明,各泥龄MBR对氨氮和COD均有较好的去除效果,但SMP的含量以及膜污染程度均随着泥龄的升高而降低.泥龄越低,膜阻力越大,小分子量物质(< 1 000)积累程度越大,低泥龄MBR中蛋白质以及腐殖酸类物质含量较高;扫描电镜-能谱分析(SEM-DEX)结果表明,金属元素更容易在低泥龄MBR中的膜表面堆积.
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| 关 键 词： | 膜生物反应器 泥龄 溶解性微生物代谢产物 膜污染 |
| 收稿时间： | 2014-05-28 |
Effect of soluble microbial products on membrane fouling in MBR at various solids retention times |
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| Li Shan, Duan Liang, Zhou Beihai, Song Yonghui, Tian Yuan. Effect of soluble microbial products on membrane fouling in MBR at various solids retention times[J]. Chinese Journal of Environmental Engineering, 2015, 9(6): 2731-2738. doi: 10.12030/j.cjee.20150631 |
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| Authors: | Li Shan Duan Liang Zhou Beihai Song Yonghui Tian Yuan |
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| Affiliation: | 1. Civil and Environmental Engineering School, University of Science and Technology Beijing Beijing, 100083, China; 2. Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 3. College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China |
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| Abstract: | The effects of soluble microbial products (SMP) on the membrane fouling were investigated in the experiments.Four sets of membrane bioreactors (MBRs) were operated parallel at different solids retention times (SRT).The protein and carbohydrate were used to characterize the concentration of SMP.The composition of SMP were examined by three-dimensional excitation emission matrix (EEM) fluorescence spectroscopy, molecular weight (MW) distribution,Fourier trans-form infrared (FTIR) spectroscopy and scanning electron microscopy-energy diffusive X-ray (SEM-EDX).The results showed that all MBRs had almost the same removal efficiency of ammonium and COD, despite the concentration of SMP and the degree of membrane fouling decreased with the increasing SRT.The MBR at short SRT indicated the highest membrane resistance and percentage of MW substances (< 1 000) of SMP.The concentrations of protein and humic-acid substance were higher at shorter SRT, and the metal elements were easier to accumulate on the membrane surface at a SRT of 10 days. |
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| Keywords: | membrane bioreactors solids retention time soluble microbial products membrane fouling |
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