Long term operation performance and membrane fouling mechanisms of anaerobic membrane bioreactor treating waste activated sludge at high solid concentration and high flux
Long term operation performance and membrane fouling mechanisms of anaerobic membrane bioreactor treating waste activated sludge at high solid concentration and high flux
复制标题
高固浓度、高通量厌氧膜生物反应器处理废活性污泥的长期运行性能及膜污染机理
DOI：
10.1016/j.scitotenv.2022.157435
复制
发表时间：
2022
影响因子：
9.8
通讯作者：
Li Yu-You
中科院分区：
文献类型：
--
作者：
Guo Guangze;Li Yemei;Zhou Shitong;Chen Yujie;Urasaki Kampachiro;Qin Yu;Kubota Kengo;Li Yu-You
高固体分厌氧膜生物反应器（HSAnMBR）在生物质处理和能源再生中得到广泛应用，但膜的运行性能和膜污染控制仍是关键问题。本研究采用HSAnMBR处理活性污泥，有机负荷为3.69- 3.72gCOD/L·d，产气率为0.38- 0.39L/gVS·d，COD转化率为40%。当混合液总固含量为25、30和40 g/L时，膜的平均通量分别为9.6、4.5和1.2 L/m2/h，过滤：弛豫比分别为4：1、1：1和1：2时，膜稳定运行。高固体分条件下膜污染的显著特点是多糖和蛋白质具有较高的污染倾向，是膜污染层的主要成分。此外，磷和镁是无机污染的主要原因。矿物质沉淀在膜上并嵌入膜孔中，有助于形成滤饼层和孔堵塞。本研究对HSAnMBR的膜运行特性和膜污染机理进行了全面的分析，以期推动HSAnMBR在废水处理中的应用。
High solid anaerobic membrane bioreactor (HSAnMBR) is widely applied in biomass treatment and energy regeneration, while membrane operation performance and membrane fouling control remain critical issues. In this study, a HSAnMBR was utilized for waste activated sludge (WAS) treatment at organic loading rates of 3.69–3.72 gCOD/L·d and biogas yield was ranged in 0.38–0.39 L/gVSfedwith the COD conversion efficiency of 40 %. The membrane operated stably when the average flux was 9.6, 4.5 and 1.2 L/m2/h at mixed liquor total solid of 25, 30 and 40 g/L with a filtration: relaxation of 4:1, 1:1 and 1:2, respectively. The distinctive characteristics of membrane fouling at high solid condition were that the polysaccharides and proteins had high fouling propensity and were the main composition of the foulant layer. Furthermore, phosphorus and magnesium were the predominant causes of inorganic fouling. The minerals precipitated on the membrane and were embedded into membrane pores, contributing to cake layer formation and pore blocking. This research provided a comprehensive analysis of the membrane operation characterization and fouling mechanisms of HSAnMBR, which was expected to push forward HSAnMBR applications to WAS treatment.