An integrated system combining in pipe thermal pretreatment with a high-solid anaerobic membrane bioreactor (AnMBR) was developed to promote the anaerobic digestion of waste activated sludge (WAS). Two different pretreatment methods investigated were the venturi nozzle treatment (VNT) and steam injector treatment (SIT), both at a low temperature of 70 °C. The biogas production after pretreatment was 23.5–30.5% higher than that of untreated WAS, and the VS based biogas yield was 0.46–0.47 L/g-VS when HRT was 15 days. The membrane operated smoothly when the average flux was 9.6 and 4.5 L/m²/h under an MLTS of 25 and 30 g/L, respectively. The calculations of the mass balance indicated that 44–45% COD was converted to methane with pretreatment and only 1% remained in the permeate. That is, high energy recovery and organic matter removal efficiency were achieved for the treatment of WAS using the high-solid AnMBR with in pipe thermal pretreatment.

开发了一种将管道热预处理与高固体厌氧膜生物反应器（AnMBR）相结合的集成系统，以促进废活性污泥（WAS）的厌氧消化。研究的两种不同的预处理方法是文丘里喷嘴处理 (VNT) 和蒸汽喷射器处理 (SIT)，均在 70 °C 的低温下进行。预处理后的沼气产量比未处理的 WAS 高 23.5-30.5%，当 HRT 为 15 天时，基于 VS 的沼气产量为 0.46-0.47 L/g-VS。当平均通量为9.6和4.5 L/m ^{2时，膜运行平稳}/h 分别在 25 和 30 g/L 的 MLTS 下。质量平衡的计算表明，经过预处理，44-45% 的 COD 转化为甲烷，只有 1% 留在渗透液中。也就是说，使用高固含量 AnMBR 和管内热预处理处理 WAS 实现了高能量回收和有机物去除效率。