一种用于增强污泥消化的厌氧动态膜生物反应器：固体停留时间对消化效果的影响。
An anaerobic dynamic membrane bioreactor for enhancing sludge digestion: Impact of solids retention time on digestion efficacy.
机构信息
State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School and Environment of Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Chengtou Wastewater Treatment Co., Ltd., Shanghai 201203, China.
State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School and Environment of Science and Engineering, Tongji University, Shanghai 200092, China.
出版信息
Bioresour Technol. 2021 Jun;329:124864. doi: 10.1016/j.biortech.2021.124864. Epub 2021 Feb 20.
An anaerobic dynamic membrane bioreactor (AnDMBR), which enabled the decoupling of hydraulic retention time (HRT) and solids retention time (SRT), was used for enhancing sludge digestion, with the associated mechanisms elucidated. With the increase of SRT, the biogas production and sludge reduction rate were both enhanced. The specific biogas production and volatile solids (VS) reduction rate were improved to 0.79 L/g VS and 55.9% under SRT 50 d, respectively. Microbial community analysis revealed that Chloroflexi, which is capable of degrading metabolites and dead cells, was enriched at longer SRT. Further analysis showed that both acetoclastic and hydrogenotrophic methanogenesis contributed to the enhanced biogas production under higher SRT compared to the dominance of acetoclastic methanogenesis under lower SRT. The enhanced utilization of organic matter and acetate at longer SRT further confirmed the mechanisms. The results highlighted the potential of AnDMBR for high-efficient sludge digestion.
采用一种可实现水力停留时间（HRT）与固体停留时间（SRT）解耦的厌氧动态膜生物反应器（AnDMBR）来强化污泥消化，并对相关机制进行了阐述。随着 SRT 的增加，沼气产量和污泥减量率均得到提高。在 SRT 为 50 天的条件下，沼气的比产气量和挥发性固体（VS）的去除率分别提高至 0.79 L/g VS 和 55.9%。微生物群落分析表明，较长的 SRT 条件下，能够降解代谢产物和死细胞的绿弯菌门得到了富集。进一步的分析表明，相比于低 SRT 下以乙酸型产甲烷作用为主导，高 SRT 下的产甲烷作用由乙酸型和氢型共同贡献。较长 SRT 下对有机物和乙酸的更充分利用进一步证实了这一机制。该结果突出了 AnDMBR 在高效污泥消化方面的潜力。
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