Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Zhongxiao E. Rd., Taipei, 10608, Taiwan.
Southern Institute of Water Resources Research, 658 Vo Van Kiet Street, District 5, Ho Chi Minh City, 700000, Vietnam.
Environ Sci Pollut Res Int. 2020 Nov;27(33):41751-41763. doi: 10.1007/s11356-020-09987-4. Epub 2020 Jul 22.
Membrane distillation (MD) has a high heat requirement. Integrating MD with thermophilic bioreactors could remedy this problem. A laboratory-scale thermophilic anaerobic granular sludge membrane distillation bioreactor (ThAGS-MDBR) was used to treat wastewater with a high organic loading rate (OLR). Waste heat from ThAGS was used directly for the MD process to reduce energy consumption. The result demonstrated that the ThAGS-MDBR system achieved a high-efficiency removal of chemical oxygen demand (more 99.5%) and NH-N (96.4%). Furthermore, the highest methane production from the proposed system was 332 mL/g COD at OLR of 16 kg COD/m/day. Specifically, an aggregate of densely packed diverse microbial communities in anaerobic granular sludge was the main mechanism for the enhancement of bioreactor tolerance with environmental changes. High-quality distillate water from ThAGS-MDBR was reclaimed in one step with total organic carbon less than 1.7 mg/L and electrical conductivity less than 120 μS/cm. Furthermore, the result of the DNA extraction kit recorded that Methanosaeta thermophila was a critical archaea for high COD removal and bioreactor stability.
膜蒸馏（MD）的热需求很高。将 MD 与嗜热生物反应器集成可以解决这个问题。使用实验室规模的嗜热厌氧颗粒污泥膜蒸馏生物反应器（ThAGS-MDBR）处理具有高有机负荷率（OLR）的废水。ThAGS 的废热被直接用于 MD 过程以减少能源消耗。结果表明，ThAGS-MDBR 系统实现了对化学需氧量（COD）的高效去除（超过 99.5%）和 NH-N（96.4%）。此外，在 OLR 为 16kg COD/m/天时，该系统的最大甲烷产量为 332mL/g COD。具体而言，厌氧颗粒污泥中密集堆积的多样化微生物群落的集合是增强生物反应器对环境变化的耐受性的主要机制。高质量的蒸馏水电导率小于 120μS/cm，总有机碳（TOC）小于 1.7mg/L，可通过一步法从 ThAGS-MDBR 中回收。此外，DNA 提取试剂盒的结果表明，嗜热甲烷菌是实现高 COD 去除和生物反应器稳定性的关键古菌。
