School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, China.
Water Environ Res. 2024 Jul;96(7):e11082. doi: 10.1002/wer.11082.
Anaerobic co-digestion using an anaerobic dynamic membrane bioreactor (AnDMBR) can separate the sludge retention time and hydraulic retention time, retaining the biomass for efficient degradation and the use of less expensive large pore-size membrane materials and more sustainable dynamic membranes (DMs). Therefore, anaerobic co-digestion of toilet blackwater (BW) and kitchen waste (KW) using an AnDMBR was hypothesized to increase the potential for co-digestion. Here, the efficiency and stability of AnDMBR in anaerobic co-digestion of toilet BW and KW were investigated. DM morphology and structural characteristics, filtration properties, and composition, as well as membrane contamination and membrane regeneration mechanisms, were investigated. Average daily biogas yields of the reactor in two membrane cycles before and after cleaning were 788.67 and 746.09 ml/g volatile solids, with average methane content of 66.64% and 67.27% and average COD removal efficiencies of 82.03% and 80.96%, respectively. The results showed that the bioreactor obtained good performance and stability. During the stabilization phase of the DM operation, the flux was maintained between 43.65 and 65.15 L/m/h. DM was mainly composed of organic and inorganic elements. Off-line cleaning facilitated DM regulation and regeneration, restoring new Anaerobic morphology and structure. PRACTITIONER POINTS: High efficiency co-digestion of BW and KW was realized in the DMBR system. Average daily biogas yields before and after membrane cleaning were 788.67 and 746.09 ml/g volatile solids. Off-line cleaning facilitated DM regulation and regeneration as well as system stability. The flux was maintained between 43.65 and 65.15 L/m/h during operation.
采用厌氧动态膜生物反应器（AnDMBR）进行厌氧共消化，可以实现污泥停留时间和水力停留时间的分离，保留生物质以实现高效降解，并使用更廉价的大孔径膜材料和更可持续的动态膜（DM）。因此，假设采用 AnDMBR 进行厕所黑水（BW）和厨房废物（KW）的厌氧共消化可以提高共消化的潜力。本研究考察了 AnDMBR 用于厌氧共消化厕所 BW 和 KW 的效率和稳定性。考察了 DM 的形态和结构特性、过滤性能和组成，以及膜污染和膜再生机制。在清洗前后两个膜周期内，反应器的平均日沼气产量分别为 788.67 和 746.09 ml/g 挥发性固体，平均甲烷含量分别为 66.64%和 67.27%，平均 COD 去除效率分别为 82.03%和 80.96%。结果表明，该生物反应器具有良好的性能和稳定性。在 DM 运行的稳定阶段，通量维持在 43.65 至 65.15 L/m/h 之间。DM 主要由有机和无机元素组成。离线清洗有利于 DM 的调节和再生，恢复新的厌氧形态和结构。
在 DMBR 系统中实现了 BW 和 KW 的高效共消化。
膜清洗前后的平均日沼气产量分别为 788.67 和 746.09 ml/g 挥发性固体。
离线清洗有利于 DM 的调节和再生以及系统的稳定性。
运行过程中通量维持在 43.65 至 65.15 L/m/h 之间。
