Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using <i>cis</i>-2-Decenoic Acid and Sodium Hypochlorite
Biofouling in the membrane bioreactor (MBR) is a bottleneck in operation. This study explores the use of <i>cis</i>-2-decenoic acid (CDA) to mitigate biofouling. CDA is a signaling molecule known to disperse biofilms, which is reported to reduce the extracellular polymeric substances (EP...
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2025-01-01
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| author | Sungjin Park Wonjung Song Chehyeun Kim Zikang Jiang Jiwon Han Jihyang Kweon |
| author_facet | Sungjin Park Wonjung Song Chehyeun Kim Zikang Jiang Jiwon Han Jihyang Kweon |
| author_sort | Sungjin Park |
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| description | Biofouling in the membrane bioreactor (MBR) is a bottleneck in operation. This study explores the use of <i>cis</i>-2-decenoic acid (CDA) to mitigate biofouling. CDA is a signaling molecule known to disperse biofilms, which is reported to reduce the extracellular polymeric substances (EPS) of biofilms and make them less chemically resistant. In our experiments, CDA 300 nM was used for the backwashing biofouling in MBR, and backwashing with CDA followed by 0 to 500 mg/L sodium hypochlorite (NaOCl) was also performed. The synergistic effect of CDA and NaOCl in alleviating biofouling was observed at CDA 300 nM and 100 mg/L NaOCl. However, controversial phenomena occurred under other conditions. An increase in biofilm removal efficiency with higher concentrations of NaOCl was not observed. Instead, the fouling rate increased at a 200 mg/L NaOCl condition compared to the control condition (i.e., DW washing). This phenomenon is hypothesized to result from the antagonistic interaction between the dispersion induction by CDA and the stress induced by NaOCl. This study specifically demonstrated the efficiency of two-stage backwashing with CDA and NaOCl in various aspects. The results of this study are expected to be utilized for optimizing MBR backwashing protocols. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-4386aa18c027479e819b4b237a4628f72025-01-24T13:21:09ZengMDPI AGApplied Sciences2076-34172025-01-0115287410.3390/app15020874Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using <i>cis</i>-2-Decenoic Acid and Sodium HypochloriteSungjin Park0Wonjung Song1Chehyeun Kim2Zikang Jiang3Jiwon Han4Jihyang Kweon5Department of Environmental Engineering, Konkuk University, Seoul 05029, Republic of KoreaThe Academy of Applied Science and Technology, Konkuk University, Seoul 05029, Republic of KoreaDepartment of Environmental Engineering, Konkuk University, Seoul 05029, Republic of KoreaDepartment of Environmental Engineering, Konkuk University, Seoul 05029, Republic of KoreaDepartment of Environmental Engineering, Konkuk University, Seoul 05029, Republic of KoreaDepartment of Environmental Engineering, Konkuk University, Seoul 05029, Republic of KoreaBiofouling in the membrane bioreactor (MBR) is a bottleneck in operation. This study explores the use of <i>cis</i>-2-decenoic acid (CDA) to mitigate biofouling. CDA is a signaling molecule known to disperse biofilms, which is reported to reduce the extracellular polymeric substances (EPS) of biofilms and make them less chemically resistant. In our experiments, CDA 300 nM was used for the backwashing biofouling in MBR, and backwashing with CDA followed by 0 to 500 mg/L sodium hypochlorite (NaOCl) was also performed. The synergistic effect of CDA and NaOCl in alleviating biofouling was observed at CDA 300 nM and 100 mg/L NaOCl. However, controversial phenomena occurred under other conditions. An increase in biofilm removal efficiency with higher concentrations of NaOCl was not observed. Instead, the fouling rate increased at a 200 mg/L NaOCl condition compared to the control condition (i.e., DW washing). This phenomenon is hypothesized to result from the antagonistic interaction between the dispersion induction by CDA and the stress induced by NaOCl. This study specifically demonstrated the efficiency of two-stage backwashing with CDA and NaOCl in various aspects. The results of this study are expected to be utilized for optimizing MBR backwashing protocols.https://www.mdpi.com/2076-3417/15/2/874<i>cis</i>-2-decenoic acidmembrane bioreactorbiofoulingsodium hypochloritebackwashingextracellular polymeric substances |
| spellingShingle | Sungjin Park Wonjung Song Chehyeun Kim Zikang Jiang Jiwon Han Jihyang Kweon Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using <i>cis</i>-2-Decenoic Acid and Sodium Hypochlorite Applied Sciences <i>cis</i>-2-decenoic acid membrane bioreactor biofouling sodium hypochlorite backwashing extracellular polymeric substances |
| title | Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using <i>cis</i>-2-Decenoic Acid and Sodium Hypochlorite |
| title_full | Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using <i>cis</i>-2-Decenoic Acid and Sodium Hypochlorite |
| title_fullStr | Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using <i>cis</i>-2-Decenoic Acid and Sodium Hypochlorite |
| title_full_unstemmed | Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using <i>cis</i>-2-Decenoic Acid and Sodium Hypochlorite |
| title_short | Evaluation of Two-Stage Backwashing on Membrane Bioreactor Biofouling Using <i>cis</i>-2-Decenoic Acid and Sodium Hypochlorite |
| title_sort | evaluation of two stage backwashing on membrane bioreactor biofouling using i cis i 2 decenoic acid and sodium hypochlorite |
| topic | <i>cis</i>-2-decenoic acid membrane bioreactor biofouling sodium hypochlorite backwashing extracellular polymeric substances |
| url | https://www.mdpi.com/2076-3417/15/2/874 |
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