Electric field-assisted aerobic composting (EAC) has been considered as a novel and effective process for enhancing compost maturation. However, the poor conductivity of compost piles affects the efficiency and applicability of EAC. Thus, this study aims to examine how conductive biochar affects compost maturation in biochar-added electric field-assisted aerobic composting (b-EAC). Our results demonstrated that the germination index and humus index significantly increased, and the compost maturation time was shortened by nearly 25% during b-EAC compared to EAC. The total oxygen utilization rate and total relative abundance of electroactive bacteria during b-EAC increased by approximately two and three times those in EAC, respectively. These findings indicated that the addition of conductive biochar has a synergistic effect which facilitated oxygen utilization by reducing resistance and accelerating electron transfer. Therefore, the addition of conductive biochar is proved to be an effective and applicable strategy for optimizing the efficiency of EAC.

电场辅助好氧堆肥 (EAC) 已被认为是一种提高堆肥成熟度的新型有效方法。然而，堆肥堆的导电性差，影响了 EAC 的效率和适用性。因此，本研究旨在研究导电生物炭如何影响添加生物炭的电场辅助好氧堆肥 (b-EAC) 中的堆肥成熟。我们的结果表明，与 EAC 相比，b-EAC 期间发芽指数和腐殖质指数显着增加，堆肥成熟时间缩短了近 25%。b-EAC 期间电活性细菌的总氧利用率和总相对丰度分别增加了 EAC 的约 2 倍和 3 倍。这些发现表明，添加导电生物炭具有协同效应，通过降低电阻和加速电子转移促进氧气利用。因此，添加导电生物炭被证明是优化 EAC 效率的有效且适用的策略。