Pilot Study on the Treatment of Rural Domestic Wastewater with Low C/N Ratio Using the AO-MABR Process
DOI:
https://doi.org/10.54097/jcghx457Keywords:
Membrane Aerated Biofilm Reactor, Low C/N Ratio, Domestic Wastewater, Chemical Oxygen Demand, Total NitrogenAbstract
To address the poor removal efficiencies of chemical oxygen demand (COD), ammonia nitrogen, and total nitrogen (TN) by existing treatment processes for rural domestic wastewater with low carbon-to-nitrogen (C/N) ratios, an integrated AO-MABR process was developed and evaluated in a field pilot-scale study. The results demonstrated that the optimal operational parameters of the process were as follows: hydraulic retention time (HRT) of 3.0 h, membrane aeration pressure of 20 kPa, and internal reflux ratio of 200%. Under these optimal conditions, when the influent C/N ratio ranged from 3 to 4, the average removal efficiencies of COD, ammonia nitrogen, and TN by the AO-MABR system reached 91.28%, 86.52%, and 86.67%, respectively, with corresponding effluent concentrations of 26.87 mg/L, 2.65 mg/L, and 4.98 mg/L. The integrated AO-MABR process exhibited superior pollutant removal performance compared with conventional treatment technologies.
Downloads
References
[1] Tan Y Q. Discussion on sewage treatment modes in towns of China [J]. Water Purification Technology, 2021, 40(3): 88–91.
[2] Li W, Xu G X, Lu J, et al. Characteristics and countermeasures of wastewater treatment facilities in small towns [J]. China Water & Wastewater, 2012, 28(6): 29–32.
[3] Liu F X, Cheng W, Liu X, et al. Application and research progress of low-impact development in sponge city construction [J]. Water Purification Technology, 2022, (9): 41.
[4] Chen J F. Study on pollutant removal from stormwater runoff by bioretention technology [D]. Qingdao: Qingdao University, 2018.
[5] Tian H L, Hu Y Z, Xu X J, et al. Enhanced wastewater treatment with high o-aminophenol concentration by two-stage MABR and its biodegradation mechanism [J]. Bioresource Technology, 2019, 289: 121649.
[6] Sun L Q. Application research of MABR technology in remediation of polluted urban rivers [D]. Tianjin: Tianjin University, 2015.
[7] Liu B H. Discussion on the application of biofilm process [J]. Green Building Materials, 2018(3): 39.
[8] Sun G Y, Song S X, Sui Q W, et al. Research and application progress of MABR enhanced biological nitrogen removal technology [J]. Membrane Science and Technology, 2022, 42(6): 178–186.
[9] Houweling D, Daigger G T. Intensifying activated sludge using media-supported biofilms [M]. New York: CRC Press, 2019: 8.
[10] Long Z B, Luo M, Ma W C, et al. Application of membrane aerated biofilm reactor in upgrading of wastewater treatment plant [J]. China Water & Wastewater, 2020, 36(17): 1–5.
[11] Shi Y, Xu D Y, Tang Y P, et al. Membrane-aerated biofilm reactor and its application in upgrading of wastewater treatment plant [J]. Industrial Water Treatment, 2021, 41(10): 22–27.
[12] Uri-Carreno N, Nielsen P H, Gernaey K V, et al. Effects of low oxidation-reduction potential on performance of full-scale hybrid membrane-aerated biofilm reactors [J]. Chemical Engineering Journal, 2023, 451: 138917.
[13] Cui Y, Zhang J, Shi H D, et al. Nitrogen removal efficiency and economic analysis of membrane bioreactor in practical application [J]. Industrial Microorganisms, 2024, 54(6): 204–206.
Downloads
Published
Issue
Section
License
Copyright (c) 2026 Academic Journal of Applied Sciences
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
