厌氧膜生物反应器处理高浓度有机废水的中试研究

doi:10.3969/j.issn.1673-1689.2015.12.003

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厌氧膜生物反应器处理高浓度有机废水的中试研究
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                        10.3969/j.issn.1673-1689.2015.12.003
                    
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Pilot Experiment of Anaerobic Membrane Bioreactor（AnMBR）for Treating High-Concentration Organic Wastewater

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对厌氧膜生物反应器（AnMBR）处理高浓度有机废水的运行效能进行了中试研究。在不排泥工况下（SRT无限长），AnMBR的COD去除负荷和沼气生产强度可分别稳定在4.4~4.8 kg /（m3?d）和2.2 m3/（m3?d）左右；而在排泥条件下（SRT=50 d）两者可分别稳定在5.2~6.0 kg /（m3?d）和2.9 m3/（m3?d）左右。在整个220 d的运行过程中，AnMBR的COD总去除率都可维持在90%以上，且沼气中甲烷体积分数基本保持在58%左右。发酵系统中pH较为稳定，保持在7.6~7.8之间；VFA含量始终维持在较低水平。此外，虽然运行过程中有较高浓度的氨氮积累，但是并没有对厌氧消化性能造成显著影响，展现了AnMBR对内源性抑制因素的良好耐受力。排泥和不排泥条件下的运行参数对比表明，AnMBR运行过程中SRT的优化非常关键，不同SRT会导致发酵体系发生一系列的变化，很大程度上决定了AnMBR的处理效能。中试结果表明，AnMBR可以实现高效厌氧消化系统的快速启动，而且良好的抗冲击负荷能力能够保证消化体系长期高效稳定运行。

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The operation of a pilot-scale anaerobic membrane bioreactor（AnMBR） for treating high-concentration organic wastewater was investigated. The result showed that AnMBR could finish the fast start-up of a highly efficient anaerobic digestion system and its good anti-shock loading capability could ensure a long-term and stable operation of the digestion system. Without the biomass withdrawal condition（SRT infinitely long），the COD removal loading rate and the biogas production strength of AnMBR were about 4.4~4.8 kg COD/（m3?d） and 2.2 m3/（m3?d），respectively，while they were 5.2~6.0 kg COD/（m3?d） and 2.9 m3/（m3?d） with biomass withdrawal（SRT=50 d）. In the whole process of 220 days，the COD removal rate was about 90% and the CH4 content was about 58%. The pH was kept at 7.6~7.8 and VFA was at a low level in the digestion system. Furthermore，the high accumulation of ammonia had no significant effect on the digestion performance，which indicated that AnMBR had good tolerance to the endogenous inhibitory factor. A comparison of the operating parameters without biomass withdrawal and with biomass withdrawal conditions showed that the optimization of sludge retention time（SRT） was very important to the AnMBR operation. Different SRTs would lead to a series of variations in the digestion system，which largely determined the processing performance of the AnMBR.

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闫林涛,黄振兴,肖小兰,任红艳,赵明星,阮文权.厌氧膜生物反应器处理高浓度有机废水的中试研究[J].食品与生物技术学报,2015,34(12):1248-1255.

YAN Lintao, HUANG Zhenxing, XIAO Xiaolan, REN Hongyan, ZHAO Mingxing, RUAN Wenquan. Pilot Experiment of Anaerobic Membrane Bioreactor（AnMBR）for Treating High-Concentration Organic Wastewater[J]. Journal of Food Science and Biotechnology,2015,34(12):1248-1255.

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