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Novel strategy for efficient energy recovery and pollutant control from sewage sludge and food waste treatment
Water Research ( IF 11.4 ) Pub Date : 2024-07-05 , DOI: 10.1016/j.watres.2024.122050 Chunxing Li 1 , Ruming Wang 2 , Zengwei Yuan 1 , Shengyu Xie 2 , Yin Wang 2 , Yifeng Zhang 3
Water Research ( IF 11.4 ) Pub Date : 2024-07-05 , DOI: 10.1016/j.watres.2024.122050 Chunxing Li 1 , Ruming Wang 2 , Zengwei Yuan 1 , Shengyu Xie 2 , Yin Wang 2 , Yifeng Zhang 3
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Considering the high organic matter contents and pollutants in sewage sludge (SS) and food waste (FW), seeking green and effective technology for energy recovery and pollutant control is a big challenge. In this study, we proposed a integrated technology combing SS mass separation by hydrothermal pretreatment, methane production from co-digestion of hydrothermally treated sewage sludge (HSS) centrate and FW, and biochar production from co-pyrolysis of HSS cake and digestate with heavy metal immobilization for synergistic utilization of SS and FW. The results showed that the co-digestion of HSS centrate with FW reduced the NH4 + -N concentration and promoted volatile fatty acids conversion, leading to a more robust anaerobic system for better methane generation. Among the co-pyrolysis of HSS cake and digestate, digestate addition improved biochar quality with heavy metals immobilization and toxicity reduction. Following the lab-scale investigation, the pilot-scale verification was successfully performed (except the co-digestion process). The mass and energy balance revealed that the produced methane could supply the whole energy consumption of the integrated system with 26.2 t biochar generation for treating 300 t SS and 120 t FW. This study presents a new strategy and technology validation for synergistic treatment of SS and FW with resource recovery and pollutants control.
中文翻译：
污水污泥和食物垃圾处理中高效能源回收和污染物控制的新策略
考虑到污水污泥（SS）和食物垃圾（FW）中的有机物含量和污染物含量较高，寻求绿色有效的能源回收和污染物控制技术是一个巨大的挑战。在这项研究中，我们提出了一种综合技术，将水热预处理的SS质量分离、水热处理污水污泥（HSS）浓缩物和FW的共消化生产甲烷、以及HSS饼和消化物与重金属的共热解生产生物炭结合起来。固定化以协同利用 SS 和 FW。结果表明，HSS 浓缩物与 FW 的共同消化降低了 NH4+-N 浓度并促进挥发性脂肪酸转化，从而形成更强大的厌氧系统，从而更好地产生甲烷。在 HSS 饼和沼渣的共热解中，沼渣的添加提高了生物炭的质量，固定了重金属并降低了毒性。在实验室规模的研究之后，成功进行了中试规模的验证（共消解过程除外）。质量和能量平衡显示，产生的甲烷可以供应集成系统的全部能源消耗，产生26.2吨生物炭，处理300吨SS和120吨FW。本研究提出了SS和FW协同处理与资源回收和污染物控制的新策略和技术验证。
更新日期：2024-07-05
中文翻译：
污水污泥和食物垃圾处理中高效能源回收和污染物控制的新策略
考虑到污水污泥（SS）和食物垃圾（FW）中的有机物含量和污染物含量较高，寻求绿色有效的能源回收和污染物控制技术是一个巨大的挑战。在这项研究中，我们提出了一种综合技术，将水热预处理的SS质量分离、水热处理污水污泥（HSS）浓缩物和FW的共消化生产甲烷、以及HSS饼和消化物与重金属的共热解生产生物炭结合起来。固定化以协同利用 SS 和 FW。结果表明，HSS 浓缩物与 FW 的共同消化降低了 NH4+-N 浓度并促进挥发性脂肪酸转化，从而形成更强大的厌氧系统，从而更好地产生甲烷。在 HSS 饼和沼渣的共热解中，沼渣的添加提高了生物炭的质量，固定了重金属并降低了毒性。在实验室规模的研究之后，成功进行了中试规模的验证（共消解过程除外）。质量和能量平衡显示，产生的甲烷可以供应集成系统的全部能源消耗，产生26.2吨生物炭，处理300吨SS和120吨FW。本研究提出了SS和FW协同处理与资源回收和污染物控制的新策略和技术验证。
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