College of Chemical Engineering, China University of Petroleum, Beijing 102249, China.
Bioresour Technol. 2011 Nov;102(21):9904-11. doi: 10.1016/j.biortech.2011.08.037. Epub 2011 Aug 11.
The supernatant of hydrothermally treated sludge was treated by an upflow anaerobic sludge blanket (UASB) reactor for a 550-days running test. The hydrothermal parameter was 170°C for 60 min. An mesophilic 8.6L UASB reactor was seeded with floc sludge. The final organic loading rate (OLR) could reach 18 kg COD/m(3)d. At the initial stage running for 189 days, the feed supernatant was diluted, and the OLR reached 11 kg COD/m(3)d. After 218 days, the reactor achieved a high OLR, and the supernatant was pumped into the reactor without dilution. The influent COD fluctuated from 20,000 to 30,000 mg/L and the COD removal rate remained at approximately 70%. After 150 days, granular sludge was observed. The energy balance calculation show that heating 1.0 kg sludge needs 0.34 MJ of energy, whereas biogas energy from the supernatant of the heated sludge is 0.43MJ.
经水热处理的污泥上清液采用上流式厌氧污泥床（UASB）反应器进行了 550 天的运行测试。水热参数为 170°C 持续 60 分钟。采用中温 8.6L UASB 反应器接种絮状污泥。最终有机负荷率（OLR）可达到 18 kg COD/m³·d。在最初的 189 天运行中，进料上清液被稀释，OLR 达到 11 kg COD/m³·d。218 天后，反应器达到了高 OLR，并且将未经稀释的上清液泵入反应器。进水 COD 从 20,000 到 30,000 mg/L 波动，COD 去除率保持在约 70%。150 天后，观察到颗粒污泥。能量平衡计算表明，加热 1.0 公斤污泥需要 0.34 MJ 的能量，而加热污泥的上清液中的沼气能量为 0.43MJ。
