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Enhanced purification of kitchen-oil wastewater driven synergistically by surface microelectric fields and microorganisms.
Environ Int. 2023 04; 174:107878.EI

Abstract

The stable structure and toxic effect of refractory organic pollutants in wastewater lead to the problem of high energy consumption in water treatment technology. Herein, we propose a synergistic purification of refractory wastewater driven by microorganisms and surface microelectric fields (SMEF) over a dual-reaction-center (DRC) catalyst HCLL-S8-M prepared by an in situ growth method of carbon nitride on the Cu-Al2O3 surface. Characterization techniques demonstrate the successful construction of SMEF with strong electrostatic force over HCLL-S8-M based on cation-π interactions between metal copper ions and carbon nitride rings. With the catalyst as the core filler, an innovative fixed bed bioreactor is constructed to purify the actual kitchen-oil wastewater. The removal efficiency of the wastewater even with a very low biodegradability (BOD5/COD = 0.33) can reach 60% after passing through this bioreactor. An innovative reaction mechanism is revealed for the first time that under the condition of a small amount of biodegradable organic matter, the SMEF induces the enrichment of electric active microorganisms (Desulfobulbus and Geobacter) in the wastewater, accelerates the interspecies electron transfer of intertrophic metabolism with the biodegradable bacteria through the extracellular electron transfer mechanism such as cytochrome C and self-secreted electron shuttle. The electrons of the refractory organic pollutants adsorbed on the surface of the catalyst are delocalized by the SMEF, which can be directly utilized by microorganisms through EPS conduction. The SMEF generated by electron polarization can maximize the utilization of pollutants and microorganisms in wastewater and further enhance degradation without adding any external energy, which is of great significance to the development of water self-purification technology.

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Authors+Show Affiliations

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China. Electronic address: huchun@gzhu.edu.cn.

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

MeSH

WastewaterNitrilesCopperEnvironmental PollutantsWater PurificationWater Pollutants, Chemical

Pub Type(s)

Journal Article

Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

36963154

Citation

Zhang, Han, et al. "Enhanced Purification of Kitchen-oil Wastewater Driven Synergistically By Surface Microelectric Fields and Microorganisms." Environment International, vol. 174, 2023, p. 107878.

Zhang H, Lyu L, Hu C, et al. Enhanced purification of kitchen-oil wastewater driven synergistically by surface microelectric fields and microorganisms. Environ Int. 2023;174:107878.

Zhang, H., Lyu, L., Hu, C., Ren, T., Li, F., Shi, Y., Han, M., Sun, Y., & Zhang, F. (2023). Enhanced purification of kitchen-oil wastewater driven synergistically by surface microelectric fields and microorganisms. Environment International, 174, 107878. https://doi.org/10.1016/j.envint.2023.107878

Zhang H, et al. Enhanced Purification of Kitchen-oil Wastewater Driven Synergistically By Surface Microelectric Fields and Microorganisms. Environ Int. 2023;174:107878. PubMed PMID: 36963154.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Enhanced purification of kitchen-oil wastewater driven synergistically by surface microelectric fields and microorganisms. AU - Zhang,Han, AU - Lyu,Lai, AU - Hu,Chun, AU - Ren,Tong, AU - Li,Fan, AU - Shi,Yuhao, AU - Han,Muen, AU - Sun,Yingtao, AU - Zhang,Fagen, Y1 - 2023/03/17/ PY - 2022/12/01/received PY - 2023/02/12/revised PY - 2023/03/13/accepted PY - 2023/4/28/medline PY - 2023/3/25/pubmed PY - 2023/3/24/entrez KW - Interspecific electron transfer KW - Microbial degradation；Kitchen-oil wastewater KW - Refractory organic pollutants KW - Surface microelectric fields SP - 107878 EP - 107878 JF - Environment international JO - Environ Int VL - 174 N2 - The stable structure and toxic effect of refractory organic pollutants in wastewater lead to the problem of high energy consumption in water treatment technology. Herein, we propose a synergistic purification of refractory wastewater driven by microorganisms and surface microelectric fields (SMEF) over a dual-reaction-center (DRC) catalyst HCLL-S8-M prepared by an in situ growth method of carbon nitride on the Cu-Al2O3 surface. Characterization techniques demonstrate the successful construction of SMEF with strong electrostatic force over HCLL-S8-M based on cation-π interactions between metal copper ions and carbon nitride rings. With the catalyst as the core filler, an innovative fixed bed bioreactor is constructed to purify the actual kitchen-oil wastewater. The removal efficiency of the wastewater even with a very low biodegradability (BOD5/COD = 0.33) can reach 60% after passing through this bioreactor. An innovative reaction mechanism is revealed for the first time that under the condition of a small amount of biodegradable organic matter, the SMEF induces the enrichment of electric active microorganisms (Desulfobulbus and Geobacter) in the wastewater, accelerates the interspecies electron transfer of intertrophic metabolism with the biodegradable bacteria through the extracellular electron transfer mechanism such as cytochrome C and self-secreted electron shuttle. The electrons of the refractory organic pollutants adsorbed on the surface of the catalyst are delocalized by the SMEF, which can be directly utilized by microorganisms through EPS conduction. The SMEF generated by electron polarization can maximize the utilization of pollutants and microorganisms in wastewater and further enhance degradation without adding any external energy, which is of great significance to the development of water self-purification technology. SN - 1873-6750 UR - https://www.unboundmedicine.com/medline/citation/36963154/Enhanced_purification_of_kitchen_oil_wastewater_driven_synergistically_by_surface_microelectric_fields_and_microorganisms_ DB - PRIME DP - Unbound Medicine ER -