Mass and energy integration study of hydrothermal carbonization with anaerobic digestion of sewage sludge
Mass and energy integration study of hydrothermal carbonization with anaerobic digestion of sewage sludge
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DOI：
10.1016/j.renene.2020.11.103
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发表时间：
2021-01-15
期刊：
影响因子：
8.7
通讯作者：
Camargo-Valero, M. A.
中科院分区：
文献类型：
--
作者：
Aragon-Briceno, C., I;Ross, A. B.;Camargo-Valero, M. A.
厌氧消化是利用污水污泥发电的最常用方法，但只有一半的污泥容易被生物降解。水热碳化被认为是利用嵌入在污水污泥中的所有能量的一种选择，因为它的高价值产品(氢炭和工艺水)。HTC紧随其后的是整合广告，这是一种最近的方法，仍在开发中。挑战是为HTC与污水处理厂现有基础设施的结合提供证据。在这项工作中，对HTC和AD耦合处理污水污泥的潜力进行了质量和能量集成研究。利用一级污泥、二级污泥和混合污泥构建了六种拟议的工艺配置，以评估净废物的产生、营养物质的去向、净能量产生和潜在的经济效益。建议的情景显示，总固体和COD的总体降幅分别高达68%和66%。与仅将沼气视为能源时相比，将氢焦作为燃料来源使净能源产量增加了10倍。潜在的鸟粪石产量在每吨处理污泥0.02至0.06公斤之间。当考虑鸟粪石和氢焦时，250摄氏度的热处理温度方案提供了更好的经济效益。(C)2020爱思唯尔有限公司。保留所有权利。
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 degrees C thermal treatment temperature provided better economic benefits when struvite and hydrochar are considered. (c) 2020 Elsevier Ltd. All rights reserved.