Institute of Sanitary and Environmental Engineering, Technische Universität Braunschweig, Germany, Pockelsstr. 2a, 38106 Braunschweig, Germany.
Institute of Sanitary and Environmental Engineering, Technische Universität Braunschweig, Germany, Pockelsstr. 2a, 38106 Braunschweig, Germany.
Bioresour Technol. 2024 Sep;407:131112. doi: 10.1016/j.biortech.2024.131112. Epub 2024 Jul 14.
Because of the naturally limited anaerobic degradability and limited biogas yield of raw sludge (RS), this study aims to increase the biogas production of primary sludge (PS) and waste activated sludge (WAS) by the integration of thermal alkaline process (TAP). PH 11 is confirmed to be the most suitable pH value for the TAP of both sludges. Moreover, with the pretreatment at pH 11 and 160 °C (6 bar) for 30 min, the investigated PSs and WASs achieved an increased biogas production of up to 81 % and 72 %, respectively. The improved net electricity production of WASs after TAP varied between 15-43 % compared to conventional WAS digestion. However, the TAP of PS at pH 11 enhanced the biogas production by 1-81 %, which did not constantly contribute to an improved net electricity production.
由于原污泥 (RS) 的自然厌氧降解性有限和沼气产率有限，本研究旨在通过热碱工艺 (TAP) 的整合来提高初沉污泥 (PS) 和剩余活性污泥 (WAS) 的沼气产量。确定 PH11 是两种污泥 TAP 的最适 pH 值。此外，在 pH 值为 11 和 160°C（6 巴）下预处理 30 分钟后，所研究的 PS 和 WAS 的沼气产量分别提高了 81%和 72%。与传统的 WAS 消化相比，TAP 后 WAS 的净电量生产提高了 15-43%。然而，PS 在 pH11 下的 TAP 提高了沼气产量 1-81%，但并不总是有助于提高净电量生产。
