Sriboonnak Sornsiri, Yanun Aegkapan, Induvesa Phacharapol, Pumas Chayakorn, Duangjan Kritsana, Rakruam Pharkphum, Nitayavardhana Saoharit, Sittisom Prattakorn, Wongrueng Aunnop
Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand.
Bodhivijjalaya College, Srinakharinwirot University, Nakhon Nayok 26120, Thailand.
Membranes (Basel). 2022 Aug 2;12(8):761. doi: 10.3390/membranes12080761.
Lab-scale anoxic/oxic membrane bioreactor (A/O-MBR) and oxic membrane bioreactor (O-MBR) systems using a submerged polysulfone hollow-fiber membrane module with a pore size of 0.01 μm and a total surface area of 1.50 m were used to treat domestic wastewater. The sludge retention time (SRT) of each system was examined by setting the SRT to 10, 20, and infinity (no sludge withdrawal). The results showed that the total nitrogen removal efficiency of the A/O-MBR was more significant than that of the O-MBR at a SRT of infinity, with figures of 72.3% and 33.1% being found, respectively. The COD removal efficiencies of the A/O-MBR system with a SRT of 10 days, 20 days, and infinity were 82.4%, 84.3%, and 91.5%, respectively. The COD removal efficiencies of the O-MBR system with a SRT of 10 days, 20 days, and infinity were 79.3%, 81.5%, and 89.8%, respectively. An increase in the SRT resulted in an increase in the COD removal efficiency. The FEEM peak of the influent tended to decrease after an increase in the SRT for both systems (A/O-MBR and O-MBR). For the A/O-MBR system, the trihalomethane formation potential (THMFP) was significantly reduced by 88.91% (at a SRT of infinity). The THMFP declined significantly by 85.39% for the O-MBR system at a SRT of infinity. The A/O-MBR system showed a slightly higher efficiency than the O-MBR system in terms of the COD removal and the THMFP reduction. These results indicated that the MBR process, and the A/O-MBR system, in particular, could be used as an effective wastewater treatment process for many developing countries that are troubled by the emerging contamination of water and wastewater.
采用孔径为0.01μm、总表面积为1.50平方米的浸没式聚砜中空纤维膜组件的实验室规模缺氧/好氧膜生物反应器（A/O-MBR）和好氧膜生物反应器（O-MBR）系统用于处理生活污水。通过将污泥停留时间（SRT）设置为10天、20天和无穷大（不排泥）来考察每个系统的污泥停留时间。结果表明，在SRT为无穷大时，A/O-MBR的总氮去除效率比O-MBR更显著，分别为72.3%和33.1%。SRT为10天、20天和无穷大时，A/O-MBR系统的化学需氧量（COD）去除效率分别为82.4%、84.3%和91.5%。SRT为10天、20天和无穷大时，O-MBR系统的COD去除效率分别为79.3%、81.5%和89.8%。SRT的增加导致COD去除效率提高。对于这两个系统（A/O-MBR和O-MBR），SRT增加后进水的荧光激发-发射矩阵（FEEM）峰趋于降低。对于A/O-MBR系统，在SRT为无穷大时，三卤甲烷生成势（THMFP）显著降低了88.91%。在SRT为无穷大时，O-MBR系统的THMFP显著下降了85.39%。在COD去除和THMFP降低方面，A/O-MBR系统的效率略高于O-MBR系统。这些结果表明，膜生物反应器工艺，特别是A/O-MBR系统，可作为许多受水和废水新出现污染困扰的发展中国家的有效废水处理工艺。
