OPERATION PERFORMANCE AND MASS BALANCE OF A LARGE PILOT-SCALE ANAEROBIC MEMBRANE BIOREACTOR(AnMBR) FOR MUNICIPAL WASTEWATER TREATMENT

KONG Zhe; WU Jiang; RONG Chao; WANG Tian-jie; LI Lu; HUANG Yong; LI Yu-you

doi:10.13205/j.hjgc.202107011

Volume 39 Issue 7

Jan. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(7): 94-100

WANG Zhi-yu, GUO Jia-lin, LI Chun, ZHANG Guo-chun, ZHAO Wei. PREPARATION PROCESS OF NEW GLASS PERMEABLE BRICKS BY HOT PRESSING[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(6): 228-232. doi: 10.13205/j.hjgc.202006037

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KONG Zhe, WU Jiang, RONG Chao, WANG Tian-jie, LI Lu, HUANG Yong, LI Yu-you. OPERATION PERFORMANCE AND MASS BALANCE OF A LARGE PILOT-SCALE ANAEROBIC MEMBRANE BIOREACTOR(AnMBR) FOR MUNICIPAL WASTEWATER TREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(7): 94-100. doi: 10.13205/j.hjgc.202107011

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OPERATION PERFORMANCE AND MASS BALANCE OF A LARGE PILOT-SCALE ANAEROBIC MEMBRANE BIOREACTOR(AnMBR) FOR MUNICIPAL WASTEWATER TREATMENT

doi: 10.13205/j.hjgc.202107011

KONG Zhe^1,2,
WU Jiang²,
RONG Chao³,
WANG Tian-jie²,
LI Lu^1,2,
HUANG Yong¹,
LI Yu-you^{2,3
,
,}

1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;
2. Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan;
3. Graduate School of Environmental Studies, Tohoku University, Sendai 980-8579, Japan

Received Date: 2021-01-15
Available Online: 2022-01-18

Abstract

Abstract

The operation performance and mass balance of a large pilot-scale anaerobic membrane bioreactor(AnMBR) in treating real municipal wastewater was investigated, by using a demonstration plant in Sendai, Japan, at a temperature of 25℃ under the control of an automatic system. This plant with 5.0 m³ effective volume was the largest one-stage submerged AnMBR that has ever applied to the treatment of municipal wastewater. During the long-term operation of 217 days, this AnMBR system realized a low hydraulic retention time(HRT) of 6 h, obtaining excellent effluent quality with the COD removal efficiency over 90% and BOD₅ removal rate over 95%. Biogas was successfully recovered from municipal wastewater with a biogas production of 0.5 L/g removed COD and 0.09~0.10 L/L raw wastewater, and the methane content in the biogas was over 75%. The sludge yield of the AnMBR was approximately 0.19~0.26 g MLSS/g COD. The suspended solid(SS) contained in the municipal wastewater was completely removed by the AnMBR, while the SS conversion efficiency was 34%~43%. The COD and nitrogen mass balance were also identified based on the experimental results. Under the operation mode of 4 min for permeating and 1 min for relaxing with a biogas sparging flow rate of 0.9 m³/min, the hollow-fiber membrane module with a total area of 72 m² was able to realize a max flux of 17.75 L/(m²·h), and the highest mean transmembrane pressure(TMP) was 23.5 kPa. An online backwash chemical cleaning system helped reduce the TMP timely. However, the TMP increased rapidly during the HRT of 6 h and a weekly online backwash was necessary. This is the first report of successful operation and detail performance of a large scale AnMBR applied in the treatment of real municipal wastewater at an HRT of 6 hours.
- anaerobic digestion,
- AnMBR,
- municipal wastewater,
- operational performance,
- mass balance

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References

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