Key Laboratory of Deep Earth Science and Engineering (Ministry of Education), College of Architecture and Environment, Institute of New Energy and Low-Carbon Technology, Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu, Sichuan 610207, PR China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan 644000, PR China.
Litree Purifying Technology Co., Ltd., Haikou, Hainan 571126, PR China.
Bioresour Technol. 2022 Jan;344(Pt A):126191. doi: 10.1016/j.biortech.2021.126191. Epub 2021 Oct 26.
Shale gas wastewater (SGW) with complex composition and high salinity needs an economical and efficient method of treatment with the main goal to remove organics. In this study, a coupled system consisting of ozonation and moving-bed-biofilm submerged membrane bioreactor (MBBF-SMBR) was comprehensively evaluated for SGW treatment and compared with a similar train comprising ozonation and submerged membrane bioreactor (SMBR) without addition of carriers attaching biofilm. The average removal rates of MBBF-SMBR were 77.8% for dissolved organic carbon (DOC) and 37.0% for total nitrogen (TN), higher than those observed in SMBR, namely, 73.9% for DOC and 18.6% for TN. The final total membrane resistance in SMBR was 40.1% higher than that in MBBF-SMBR. Some genera that specifically contribute to organic removal were identified. Enhanced gene allocation for membrane transport and nitrogen metabolism was found in MBBF-SMBR biofilm, implying that this system has significant industrial application potential for organics removal from SGW.
页岩气废水（SGW）成分复杂、盐分高，需要一种经济高效的处理方法，主要目标是去除有机物。在本研究中，综合评估了由臭氧氧化和移动床生物膜淹没式膜生物反应器（MBBF-SMBR）组成的耦合系统对 SGW 的处理效果，并与类似的由臭氧氧化和淹没式膜生物反应器（SMBR）组成的系统进行了比较，后者没有添加附着生物膜的载体。MBBF-SMBR 的平均去除率分别为溶解有机碳（DOC）的 77.8%和总氮（TN）的 37.0%，高于 SMBR 观察到的 73.9%的 DOC 和 18.6%的 TN。SMBR 中的总膜阻力最终比 MBBF-SMBR 高 40.1%。鉴定出一些专门用于去除有机物的属。在 MBBF-SMBR 生物膜中发现了增强的膜运输和氮代谢的基因分配，这表明该系统在去除 SGW 中的有机物方面具有显著的工业应用潜力。
