To preconcentrate domestic sewage and control membrane fouling, this study proposed a novel anaerobic membrane-based preconcentration (AnMPC) system and controlled fouling by coagulation-adsorption assisted biogas sparging. The effect of polyaluminium chloride (PACl) dosage on membrane fouling control and methane potential of preconcentrated domestic sewage was also investigated. Membrane fouling control was realized by the increase of particle-size (6.03%–40.65%) and the decline of soluble microbial product (11.10%–33.14%) with the rise of PACl addition. The minimum membrane filtration resistance of 1.15 × 10¹³ m⁻¹ was obtained at the group with 10 mg/L PACl, which was 7.96%–28.20% lower than other groups. More than 75% of chemical oxygen demand (COD) could be preconcentrated, and the preconcentrated ratio increased by 4.22%–9.70% with the rise of PACl addition. Methane potential decreased by 5.40%–40.56% due to the inhibition of accumulated PACl. The pre-hydrolysis of domestic sewage during AnMPC could shorten fermentation time by 0.8–3.2 d. The group with 10 mg/L PACl addition was the optimal due to the excellent anti-fouling performance and the promising energy balance. This study could provide a promising membrane-based preconcentration method with high COD recovery and mild membrane fouling for sustainable treatment of domestic sewage.

为了预浓缩生活污水和控制膜污染，本研究提出了一种新型厌氧膜预浓缩 (AnMPC) 系统，并通过混凝吸附辅助沼气喷射控制污染。还研究了聚合氯化铝 (PACl) 用量对预浓​​缩生活污水的膜污染控制和甲烷潜力的影响。随着 PACl 添加量的增加，粒径增加（6.03%–40.65%）和可溶性微生物产物（11.10%–33.14%）下降，实现了膜污染控制。最小膜过滤阻力1.15×10 ¹³  m ⁻¹在 10 mg/L PACl 组获得，比其他组低 7.96%–28.20%。超过75%的化学需氧量（COD）可以被预浓缩，随着PACl添加量的增加，预浓缩率提高了4.22%~9.70%。由于 PACl 积累的抑制作用，甲烷潜力降低了 5.40%–40.56%。AnMPC期间对生活污水进行预水解可缩短发酵时间0.8-3.2 d。添加 10 mg/L PACl 的组是最佳的，因为它具有出色的防污性能和有前途的能量平衡。本研究可为可持续处理生活污水提供一种具有高 COD 回收率和轻度膜污染的基于膜的预浓缩方法。