Abstract Anaerobic Digestion is the most common process used for energy generation from sewage sludge but only one half of the sewage sludge is susceptible to biodegradation. Hydrothermal Carbonization is considered an option for harness all the energy embedded in sewage sludge because of its high-value products (Hydrochar and Process waters). The integration AD followed by HTC is a recent approach that is still under development. The challenge is to provide evidence for coupling HTC with the existing infrastructure at wastewater treatment works. In this work, a mass and energy integration study of the potential of coupling HTC with AD for sewage sludge treatment was evaluated. Six proposed process configurations were built using primary sludge, secondary sludge and a mix, in order to evaluate net waste generation, fate of nutrients, net energy production and potential economic benefits. The proposed scenarios showed an overall total solid and COD reduction up to 68 and 66% respectively. The inclusion of hydrochar as a fuel source increased the net energy production 10 times compared when only biogas is considered as an energy source. The potential struvite production ranged from 0.02 to 0.06 kg per tonne of sludge treated. Scenarios with 250°C thermal treatment temperature provided better economic benefits when struvite and hydrochar are considered.

中文翻译：

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污水污泥厌氧消化热液碳化质能一体化研究

摘要 厌氧消化是污水污泥中最常用的能源生产工艺，但只有一半的污水污泥易于生物降解。由于其高价值产品（Hydrochar 和工艺用水），水热碳化被认为是利用污水污泥中所有能量的一种选择。HTC 遵循的集成 AD 是一种最近的方法，仍在开发中。面临的挑战是为 HTC 与废水处理厂的现有基础设施相结合提供证据。在这项工作中，评估了将 HTC 与 AD 耦合用于污水污泥处理的潜力的质量和能量整合研究。使用初级污泥、二级污泥和混合物构建了六种拟议的工艺配置，以评估净废物产生、营养物质的归宿、净能源产量和潜在的经济效益。提议的方案显示总固体和 COD 分别减少了 68% 和 66%。与仅将沼气视为能源时相比，将 Hydrochar 作为燃料来源的净能源产量增加了 10 倍。每吨处理的污泥的潜在鸟粪石产量为 0.02 至 0.06 公斤。当考虑鸟粪石和水焦炭时，热处理温度为 250°C 的方案提供了更好的经济效益。每吨处理的污泥的潜在鸟粪石产量为 0.02 至 0.06 公斤。当考虑鸟粪石和水焦炭时，热处理温度为 250°C 的方案提供了更好的经济效益。每吨处理的污泥的潜在鸟粪石产量为 0.02 至 0.06 公斤。当考虑鸟粪石和水焦炭时，热处理温度为 250°C 的方案提供了更好的经济效益。