Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration
Anaerobic biodegradation is a promising and economical process to remove phenol in the wastewater, although the reaction kinetics are often limited by the toxicity of phenol. This study proposed a strategy to accelerate phenol degradation and mitigate its inhibition on the bioprocess by adding condu...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/136937 |
| _version_ | 1811692817548836864 |
|---|---|
| author | Yan, Wangwang Sun, Faqian Liu, Jianbo Zhou, Yan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Yan, Wangwang Sun, Faqian Liu, Jianbo Zhou, Yan |
| author_sort | Yan, Wangwang |
| collection | NTU |
| description | Anaerobic biodegradation is a promising and economical process to remove phenol in the wastewater, although the reaction kinetics are often limited by the toxicity of phenol. This study proposed a strategy to accelerate phenol degradation and mitigate its inhibition on the bioprocess by adding conductive materials (CMs) into the anaerobic degradation system. The results showed that CMs could stimulate phenol degradation up to one–fold higher than that in control group. Certain extracellular polymeric substances (EPS) compounds that can act as electron shuttles, i.e. protein and humic substances, were greatly enriched with the existence of CMs. In particular, compared with control group, CMs supplemented groups had 2.3 and 10 to 20 folds low molecular weight protein in bound and soluble EPS, respectively. Carbon nanotube supplemented group exhibited 3 times higher humic substance in soluble EPS. The overall electron transport system activity in CMs groups was much higher than that in control groups. The addition of CMs enriched phenol degradation bacteria–Syntrophorhabdus, Brooklawnia, Treponema and Syntrophus, as well as electroactive methanogens–Methanosaeta. It is proposed that Syntrophus and Methanosaeta were the functional genera in methanogenic phenol degradation via extracellular electron transfer. This study revealed that the presence of CMs altered the EPS composition and microbial community of the system and made it become more favorable for extracellular electron transfer. |
| first_indexed | 2024-10-01T06:41:49Z |
| format | Journal Article |
| id | ntu-10356/136937 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:41:49Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1369372020-02-06T03:38:47Z Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration Yan, Wangwang Sun, Faqian Liu, Jianbo Zhou, Yan School of Civil and Environmental Engineering Advanced Environmental Biotechnology Centre Nanyang Environment and Water Research Institute Engineering::Environmental engineering Phenol Degradation Extracellular Polymeric Substances (EPS) Anaerobic biodegradation is a promising and economical process to remove phenol in the wastewater, although the reaction kinetics are often limited by the toxicity of phenol. This study proposed a strategy to accelerate phenol degradation and mitigate its inhibition on the bioprocess by adding conductive materials (CMs) into the anaerobic degradation system. The results showed that CMs could stimulate phenol degradation up to one–fold higher than that in control group. Certain extracellular polymeric substances (EPS) compounds that can act as electron shuttles, i.e. protein and humic substances, were greatly enriched with the existence of CMs. In particular, compared with control group, CMs supplemented groups had 2.3 and 10 to 20 folds low molecular weight protein in bound and soluble EPS, respectively. Carbon nanotube supplemented group exhibited 3 times higher humic substance in soluble EPS. The overall electron transport system activity in CMs groups was much higher than that in control groups. The addition of CMs enriched phenol degradation bacteria–Syntrophorhabdus, Brooklawnia, Treponema and Syntrophus, as well as electroactive methanogens–Methanosaeta. It is proposed that Syntrophus and Methanosaeta were the functional genera in methanogenic phenol degradation via extracellular electron transfer. This study revealed that the presence of CMs altered the EPS composition and microbial community of the system and made it become more favorable for extracellular electron transfer. Accepted version 2020-02-06T03:38:46Z 2020-02-06T03:38:46Z 2018 Journal Article Yan, W., Sun, F., Liu, J., & Zhou, Y. (2018). Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration. Chemical Engineering Journal, 352, 1-9. doi:10.1016/j.cej.2018.06.187 1385-8947 https://hdl.handle.net/10356/136937 10.1016/j.cej.2018.06.187 2-s2.0-85049314513 352 1 9 en Chemical Engineering Journal © 2018 Elsevier B.V. All rights reserved. This paper was published in Chemical Engineering Journal and is made available with permission of Elsevier B.V. application/pdf |
| spellingShingle | Engineering::Environmental engineering Phenol Degradation Extracellular Polymeric Substances (EPS) Yan, Wangwang Sun, Faqian Liu, Jianbo Zhou, Yan Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration |
| title | Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration |
| title_full | Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration |
| title_fullStr | Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration |
| title_full_unstemmed | Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration |
| title_short | Enhanced anaerobic phenol degradation by conductive materials via EPS and microbial community alteration |
| title_sort | enhanced anaerobic phenol degradation by conductive materials via eps and microbial community alteration |
| topic | Engineering::Environmental engineering Phenol Degradation Extracellular Polymeric Substances (EPS) |
| url | https://hdl.handle.net/10356/136937 |
| work_keys_str_mv | AT yanwangwang enhancedanaerobicphenoldegradationbyconductivematerialsviaepsandmicrobialcommunityalteration AT sunfaqian enhancedanaerobicphenoldegradationbyconductivematerialsviaepsandmicrobialcommunityalteration AT liujianbo enhancedanaerobicphenoldegradationbyconductivematerialsviaepsandmicrobialcommunityalteration AT zhouyan enhancedanaerobicphenoldegradationbyconductivematerialsviaepsandmicrobialcommunityalteration |