Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, 33104 Tampere University, Finland.
Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, 33104 Tampere University, Finland.
Waste Manag. 2024 Jan 1;173:99-108. doi: 10.1016/j.wasman.2023.11.012. Epub 2023 Nov 18.
In recent years, extensive experimental research on hydrothermal carbonization (HTC) of sewage sludge has been performed, to study the effects of process conditions on hydrochar characteristics and nutrient, carbon, and energy recovery from sewage sludge. To promote the implementation of HTC, this study assessed HTC (230 °C, 30 min) integration into an advanced centralized biogas plant by analyzing its theoretical effects on the fates of sewage sludge solids, nitrogen, phosphorus, and carbon. The study used the mass and nutrient flows and concentrations obtained from laboratory studies, and the studied biogas plant had an original layout that employed hygienization. HTC integration decreased the solid product volume by up to 56 % and, increased the recovery of ammonium in ammonia water by 33 % and methane by 1.4 %, while increasing the biogas plant energy demand by 4 %. The changes in the nutrient and solids flows and their recovery potentials show the need to consider the rearrangements of the liquid and gas flows in the biogas plant and the re-dimensioning of stripping process.
近年来，人们对污水污泥的水热碳化（HTC）进行了广泛的实验研究，以研究工艺条件对水炭特性的影响，并从污水污泥中回收营养物、碳和能源。为了促进 HTC 的实施，本研究通过分析 HTC（230°C，30 分钟）集成到先进的集中沼气厂的理论效果，评估了 HTC 对污水污泥固体、氮、磷和碳命运的影响。该研究使用从实验室研究中获得的质量和养分流量和浓度，并且所研究的沼气厂具有采用卫生化的原始布局。HTC 集成将固体产物的体积减少了多达 56%，并将氨水中的氨回收率提高了 33%，甲烷回收率提高了 1.4%，同时沼气厂的能源需求增加了 4%。养分和固体流量的变化及其回收潜力表明，需要考虑沼气厂中液体和气体流量的重新布置以及汽提过程的重新设计。
