Sun Ronglin, Jin Yue
Guangxi Key Laboratory of Theory & Technology for Environmental Pollution Control, College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China.
Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China.
Membranes (Basel). 2022 Apr 27;12(5):473. doi: 10.3390/membranes12050473.
The offshore oil extraction process generates copious amounts of high-salinity oil-bearing wastewater; at present, treating such wastewater in an efficient and low-consumption manner is a major challenge. In this study, a flat ceramic membrane bioreactor (C-MBR) process combining aerobic microbial treatment technology and ceramic membrane filtration technology was used to treat oil-bearing wastewater. The pilot test results demonstrated the remarkable performance of the combined sequential batch reactor (SBR) and C-MBR process, wherein the chemical oxygen demand (COD) and ammonia nitrogen (NH-N) removal rates reached 93% and 98.9%, respectively. Microbial analysis indicated that the symbiosis between , , and might have contributed to simultaneously removing NH-N and reducing COD, and the increased enrichment of significantly improved the nitrogen removal efficiency. Cleaning ceramic membranes with NaClO solution reduces membrane contamination and membrane cleaning frequency. The combined SBR and C-MBR process is an economical and feasible solution for treating high-salinity oil-bearing wastewater. Based on the pilot application study, the capital expenditure for operating the full-scale combined SBR and C-MBR process was estimated to be 251,717 USD/year, and the unit wastewater treatment cost was 0.21 USD/m, which saved 62.5% of the energy cost compared to the conventional MBR process.
海上石油开采过程会产生大量高盐度含油废水；目前，以高效低耗的方式处理此类废水是一项重大挑战。在本研究中，采用结合好氧微生物处理技术和陶瓷膜过滤技术的平板陶瓷膜生物反应器（C-MBR）工艺来处理含油废水。中试试验结果表明序批式反应器（SBR）与C-MBR联合工艺性能卓越，其中化学需氧量（COD）和氨氮（NH-N）去除率分别达到93%和98.9%。微生物分析表明，[此处原文缺失具体微生物名称]之间的共生关系可能有助于同时去除NH-N和降低COD，且[此处原文缺失具体微生物名称]富集程度的增加显著提高了脱氮效率。用NaClO溶液清洗陶瓷膜可减少膜污染并降低膜清洗频率。SBR与C-MBR联合工艺是处理高盐度含油废水的一种经济可行的解决方案。基于中试应用研究，运行全尺寸SBR与C-MBR联合工艺的资本支出估计为每年251,717美元，单位废水处理成本为0.21美元/立方米，与传统MBR工艺相比节省了62.5%的能源成本。
