In this study, co-digestion of mixed sewage sludge from a wastewater treatment plant (WWTP) and partially dephenolised two-phase olive pomace (DOP) as a co-substrate was addressed with the aim of improving the biodigestibility of both substrates. The introduction of DOP into WWTP anaerobic digester facilities could significantly increase biomethane production and enhance the sustainability of both activities. An improvement in the system’s performance was supported by stability parameters: total alkalinity increased and stabilised with the addition of 5% v/v DOP, and the specific energy loading rate was maintained at 0.177 ± 0.03 d⁻¹, which indicated better buffer capacity and stability in the bioreactor, and the possibility of enhancing the organic loading rate. In terms of average daily biogas production rate, an increase of 39% was achieved, up to 0.39 ± 0.11 L L⁻¹d⁻¹. Moreover, there was a 40% and 37% improvement in specific methane production and methane production rate, respectively, up to 0.28 ± 0.02 L CH₄ g _TVS⁻¹ and 0.26 ± 0.08 L L⁻¹d⁻¹. In addition, the proposed strategy leads to an energy saving of 20,328.6 kWh year⁻¹ at the WWTP as a result of the electric energy production surplus, corresponding to an annual saving of €3293.23.

在这项研究中，共同消化来自废水处理厂 (WWTP) 的混合污水污泥和作为共同底物的部分脱酚两相橄榄渣 (DOP)，旨在提高两种底物的生物消化率。将 DOP 引入 WWTP 厌氧消化器设施可显着增加生物甲烷产量并增强这两项活动的可持续性。稳定性参数支持系统性能的改进：添加 5% v/v DOP 后总碱度增加并稳定，比能量负载率保持在 0.177 ± 0.03 d ^-1，这表明生物反应器具有更好的缓冲能力和稳定性，以及提高有机负载率的可能性。就平均每日沼气产量而言，实现了 39% 的增长，高达 0.39 ± 0.11 LL ^-1 d ^-1。此外，比甲烷产量和甲烷产量分别提高了 40% 和 37%，达到 0.28 ± 0.02 L CH ₄ g _TVS ^-1和 0.26 ± 0.08 LL ^-1 d ^-1。^{此外，由于电能生产过剩，所提议的策略导致污水处理厂每年-1}节电 20,328.6 千瓦时，相当于每年节省 3293.23 欧元。