厌氧膜生物反应器处理甲胺废水效能评价

陈松; 赵鹤翔; 杜博文; 杨俞; 焦城璠; 李倩; 李玉友

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (5) : 2462-2469.

水污染与控制

厌氧膜生物反应器处理甲胺废水效能评价

陈松¹, 赵鹤翔^1,2, 杜博文², 杨俞², 焦城璠¹, 李倩¹, 李玉友³

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Efficiency evaluation of anaerobic membrane bioreactor for treating methylamine wastewater

CHEN Song¹, ZHAO He-xiang^1,2, DU Bo-wen², YANG Yu², JIAO Cheng-fan¹, LI Qian¹, LI Yu-you³

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摘要

搭建了实验室规模的AnMBR,考察了处理甲胺废水的产甲烷性能、有机物去除效果、膜污染行为以及最优工况下的物料流动和节能减排情况.结果表明,随着HRT从36h启动并逐渐缩短至8h,平均甲烷产率从0.231LCH₄/gCOD逐渐升高至0.287LCH₄/gCOD,运行过程中COD去除率稳定在95%以上,甲胺去除率高达100%,HRT进一步缩至6h后甲胺去除率仅为44.3%,甲胺的积累导致反应器性能下降,平均甲烷产率降至0.094LCH₄/gCOD.运行期间膜通量从1LMH逐渐升高至6LMH,跨膜压差(TMP)增长速度总体平缓,在HRT=12h时长时间的运行导致TMP超过20kPa的阈值,此时更换膜组件并进行膜污染分析,结果表明主要污染部分为膜内部积累的不可逆有机污染,这与微生物分泌的胞外聚合物有直接关联.对各阶段的产甲烷性能和TMP增长速度进行综合考量得出最优工况为HRT=8h,其中80%以上的进水COD转化为了甲烷,产生的生物能源显著高于系统运行的电力消耗,净能量潜力达到4.142kW·h/m³,且能够减少2.239kgCO₂/m³的碳排放.

Abstract

A laboratory-scale AnMBR was established to investigate the methanogenic performance, organic matter removal efficiency, membrane fouling behavior, as well as the material flow and energy conservation and emission reduction under the optimal operating conditions during the treatment of methylamine wastewater. The results showed that as hydraulic retention time (HRT) decreased from 36h to 8h, average methane yield rose from 0.231L CH₄/g COD to 0.287L CH₄/g COD. COD removal was stable above 95%, methylamine removal hit 100%. But at 6h HRT, methylamine removal was only 44.3%, reactor performance dropped, and methane yield fell to 0.094L CH₄/g COD. Membrane flux rose from 1LMH to 6LMH, transmembrane pressure (TMP) growth was slow. At 12h HRT, long operation made TMP exceed 20kPa. After replacing the membrane module, analysis show irreversible fouling inside, relate to microbial extracellular polymers. Considering comprehensively the methanogenic performance and the growth rate of TMP in each stage, the optimal operating condition is determined as HRT = 8h. More than 80% of the influent COD is converted into methane, the generated bioenergy is significantly higher than the power consumption of the system operation, the net energy potential reaches 4.142kW·h/m³, and it can reduce carbon emissions by 2.239kg CO₂/m³.

导出引用

陈松, 赵鹤翔, 杜博文, 杨俞, 焦城璠, 李倩, 李玉友. 厌氧膜生物反应器处理甲胺废水效能评价[J]. 中国环境科学. 2025, 45(5): 2462-2469

CHEN Song, ZHAO He-xiang, DU Bo-wen, YANG Yu, JIAO Cheng-fan, LI Qian, LI Yu-you. Efficiency evaluation of anaerobic membrane bioreactor for treating methylamine wastewater[J]. China Environmental Science. 2025, 45(5): 2462-2469

中图分类号： X703

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