Achieving Simultaneous Nitrification and Denitrification by a Membrane Aerated Biofilm Reactor at Moderate Lumen Pressure DOI Creative Commons
Huiyun Zhong, Yuanyuan Tang, Mengyu Wang

et al.

Separations, Journal Year: 2024, Volume and Issue: 11(8), P. 227 - 227

Published: July 25, 2024

Lumen pressure is of crucial importance to achieve simultaneous nitrification and denitrification (SND) in the membrane aerated biofilm reactor (MABR); so, this study, a laboratory-scale MABR was operated under different lumen pressures (7 kPa, 10 13 16 kPa) successively verify its impact on nitrogen removal. The results showed that NH4+-N oxidation deficient 7 kPa due inadequate oxygen supply, while depressed kPa. Total removal efficiency similar (around 78.9%), much higher than (approximately 50%). biomass density (22.35 g/m2) thickness (500.3 µm) were highest EPS increasingly secreted along with increase pressure. relative abundance Nitrospirae (3.53%), indicating could promote nitrifiers. denitrifying-related microbes, such as β-proteobacteria, α-proteobacteria ε-proteobacteria, an increasing then decreasing pattern increase, enriched at draw conclusion SND be achieved moderate pressure, i.e., study.

Language: Английский

Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using cis-2-Decenoic Acid and Sodium Hypochlorite DOI Creative Commons
Sungjin Park,

Wonjung Song,

C H Kim

et al.

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(2), P. 874 - 874

Published: Jan. 17, 2025

Biofouling in the membrane bioreactor (MBR) is a bottleneck operation. This study explores use of cis-2-decenoic acid (CDA) to mitigate biofouling. CDA signaling molecule known disperse biofilms, which reported reduce extracellular polymeric substances (EPS) biofilms and make them less chemically resistant. In our experiments, 300 nM was used for backwashing biofouling MBR, with followed by 0 500 mg/L sodium hypochlorite (NaOCl) also performed. The synergistic effect NaOCl alleviating observed at 100 NaOCl. However, controversial phenomena occurred under other conditions. An increase biofilm removal efficiency higher concentrations not observed. Instead, fouling rate increased 200 condition compared control (i.e., DW washing). phenomenon hypothesized result from antagonistic interaction between dispersion induction stress induced specifically demonstrated two-stage various aspects. results this are expected be utilized optimizing MBR protocols.

Language: Английский

Citations

0
Achieving Simultaneous Nitrification and Denitrification by a Membrane Aerated Biofilm Reactor at Moderate Lumen Pressure DOI Creative Commons
Huiyun Zhong, Yuanyuan Tang, Mengyu Wang

et al.

Separations, Journal Year: 2024, Volume and Issue: 11(8), P. 227 - 227

Published: July 25, 2024

Lumen pressure is of crucial importance to achieve simultaneous nitrification and denitrification (SND) in the membrane aerated biofilm reactor (MABR); so, this study, a laboratory-scale MABR was operated under different lumen pressures (7 kPa, 10 13 16 kPa) successively verify its impact on nitrogen removal. The results showed that NH4+-N oxidation deficient 7 kPa due inadequate oxygen supply, while depressed kPa. Total removal efficiency similar (around 78.9%), much higher than (approximately 50%). biomass density (22.35 g/m2) thickness (500.3 µm) were highest EPS increasingly secreted along with increase pressure. relative abundance Nitrospirae (3.53%), indicating could promote nitrifiers. denitrifying-related microbes, such as β-proteobacteria, α-proteobacteria ε-proteobacteria, an increasing then decreasing pattern increase, enriched at draw conclusion SND be achieved moderate pressure, i.e., study.

Language: Английский

Citations

1