Anaerobic digestibility of up-concentrated organic matter obtained from direct membrane filtration of municipal wastewater
Anaerobic digestibility of up-concentrated organic matter obtained from direct membrane filtration of municipal wastewater
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DOI：
10.1016/j.bej.2020.107692
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发表时间：
2020-09-15
影响因子：
3.9
通讯作者：
Kimura, Katsuki
中科院分区：
文献类型：
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作者：
Hafuka, Akira;Takahashi, Taketsugu;Kimura, Katsuki
直接膜过滤（DMF）工艺是一种很有前途的从城市废水中浓缩和回收有机物（OM）的技术。本研究调查了从 DMF 工艺中获得的浓缩 OM 的厌氧消化率。来自初级沉淀池的废水用作给水。还研究了 DMF 工艺中添加聚合氯化铝 (PACl) 对所得浓缩 OM 厌氧消化率的影响，因为 PACl 有时在 DMF 工艺中用作混凝剂，以提高废水质量和 OM 回收率，并减轻膜污染。进行批量厌氧消化实验来实现这些目标。将获得的数据拟合到反应曲线模型表明，基于进料挥发性固体（VSfed）的最大沼气产量，含PACl的上浓缩OM达到0.56 L-Biogas/g-VSfed，高于不含PACl的上浓缩OM（0.47 L-Biogas/g-VSfed）、废弃活性污泥（0.35 L-Biogas/g-VSfed）。 L-沼气/g-VSfed）和混合污泥（0.48 L-沼气/g-VSfed）。基于含有PACl的浓缩OM的降解VS(VSdeg)的甲烷产率为0.56L-CH 4 /g-VSdeg，这也是最高的。这些结果表明，从DMF工艺中获得的浓缩OM具有很高的沼气生产潜力，并且在DMF工艺中添加PACl（类似于4.3 mg-Al/L）可以提高沼气产量。
Direct membrane filtration (DMF) process is a promising technology for up-concentration and recovery of organic matter (OM) from municipal wastewater. This study investigates anaerobic digestibility of up-concentrated OM obtained from the DMF process. Effluent from a primary sedimentation basin was used as feed water. Effect of polyaluminum chloride (PACl) addition to the DMF process on the anaerobic digestibility of obtained upconcentrated OM was also investigated because PACl is sometimes used as a coagulant in the DMF process for improving effluent quality and OM recovery, and for mitigating membrane fouling. Batch anaerobic digestion experiments were conducted to achieve these objectives. Fitting the obtained data to the reaction curve model revealed that maximum biogas production based on feed volatile solids (VSfed) from up-concentrated OM containing PACl reached 0.56 L-Biogas/g-VSfed, which was higher than from up-concentrated OM without PACl (0.47 L-Biogas/g-VSfed), waste activated sludge (0.35 L-Biogas/g-VSfed), and mixed sludge (0.48 L-Biogas/g-VSfed). Methane yield based on degraded VS (VSdeg) of up-concentrated OM containing PACl was 0.56 L-CH4/g-VSdeg, which was also highest. These results indicate the up-concentrated OM obtained from the DMF process has high potential for biogas production, and the addition of PACl in the DMF process (similar to 4.3 mg-Al/L) could enhance the biogas production.