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首页> 外文期刊>Journal of Environmental Science and Health >Effects of coupling a UF membrane with a mesh screen and elevating temperature in the methanogenic digester of a two-phased anaerobic system
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Effects of coupling a UF membrane with a mesh screen and elevating temperature in the methanogenic digester of a two-phased anaerobic system

机译：两相厌氧系统产甲烷消化池中超滤膜与筛网耦合和温度升高的影响

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摘要

This study was conducted to investigate coupling of UF with a mesh screen under thermophilic temperatures and compare the effectiveness of membrane filtration and temperature change in the methanogenic digester. A two-phased anaerobic digester coupled with an ultrafiltration (UF) membrane system was used for anaerobic sludge digestion. The overall average chemical oxygen demand (COD) removal efficiency achieved in the two-phased anaerobic digester coupled with the UF membrane system was 97.9 +/- 0.8%. In the methanogenic digester, 10.5% improvement of methane production rate was obtained by the increased microbial population and metabolic activity due to coupling with a UF membrane and a mesh screen and elevating the temperature from mesophilic to thermophilic conditions. The average methane production per VS loading and unit volume (m(3)) was 477.14 +/- 31.5 and 567.15 +/- 43.3mL CH(4)g(-1) VS before and after elevating the temperature, respectively. The optimal operating pressure for the UF membrane system was less than 3kg(f) cm(-2), and the mesh screen saved 19.0% of the operating cost and 17.3% of energy consumption. As a result, the UF membrane system enhanced the digestion of sewage sludge, where the elevation of temperature improved the methane production rate in the thermophilic methanogenic digester.
机译：进行这项研究以研究在高温下超滤与网筛的耦合，并比较产甲烷消化池中膜过滤的有效性和温度变化。两阶段厌氧消化池结合超滤（UF）膜系统用于厌氧污泥消化。在两相厌氧消化池中结合超滤膜系统实现的总平均化学需氧量（COD）去除效率为97.9 +/- 0.8％。在产甲烷消化池中，由于与UF膜和筛网相连并提高了温度从中温到嗜热条件，微生物种群的增加和代谢活性的提高，甲烷生产率提高了10.5％。在升高温度之前和之后，每VS负载和单位体积（m（3））的平均甲烷产量分别为477.14 +/- 31.5和567.15 +/- 43.3mL CH（4）g（-1）VS。超滤膜系统的最佳操作压力小于3kg（f）cm（-2），并且网筛节省了19.0％的操作成本和17.3％的能耗。结果，超滤膜系统增强了污水污泥的消化，其中温度的升高提高了嗜热产甲烷消化池中甲烷的生产率。

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