Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China.
Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China.
Bioresour Technol. 2021 Oct;338:125520. doi: 10.1016/j.biortech.2021.125520. Epub 2021 Jul 8.
Microbial electrolysis cells (MECs) and exogenous accelerants can augment anaerobic digestion performance. Herein, MECs and coconut-shell-derived bio-based carbon (CBC) accelerant are adopted to strengthen anaerobic co-digestion of cow manure and aloe peel waste. The MEC with the voltage of 0.6 V and CBC accelerant of 0.15 wt.% gained the highest cumulative biogas yield (444.20 NmL/g VS) and chemical oxygen demand removal rate (75.46%), which are 80.25% and 58.33% higher than those (246.44 NmL/g VS, 47.66%) of the blank group, respectively. The digestates embodied a utilization potential with thermogravimetric loss of 37.12%-50.67% and total nutrient content of 35.36-51.58 g/kg. These results benefited from excellent electrocatalytic activity of MECs and physicochemical properties of CBC accelerant. A general strategy for understanding improved methanogenesis was proposed based on integrated effects of MECs and CBC accelerant. This work will shed light on development of anaerobic co-digestion by combining MECs and bio-based carbon accelerants.
微生物电解池 (MEC) 和外加加速剂可以提高厌氧消化性能。在此，采用 MEC 和椰子壳衍生的生物基碳 (CBC) 加速剂来强化牛粪和芦荟皮废物的厌氧共消化。电压为 0.6 V 的 MEC 和添加 0.15 wt.% CBC 加速剂时获得了最高的累计沼气产量 (444.20 NmL/g VS) 和化学需氧量去除率 (75.46%)，分别比空白组 (246.44 NmL/g VS，47.66%) 高 80.25%和 58.33%。消化物具有利用潜力，热重损失为 37.12%-50.67%，总养分含量为 35.36-51.58 g/kg。这些结果得益于 MEC 出色的电催化活性和 CBC 加速剂的物理化学性质。基于 MEC 和 CBC 加速剂的综合效应，提出了一种理解甲烷生成增强的一般策略。这项工作将为结合 MEC 和生物基碳加速剂进行厌氧共消化提供启示。
