{"title":"探索处理硝酸盐污染废水的连续双室生物电化学系统中的混养反硝化作用","authors":"","doi":"10.1016/j.jece.2024.114195","DOIUrl":null,"url":null,"abstract":"<div><div>Nitrate (NO<sub>3</sub><sup>-</sup>) pollution in aquatic environments, mainly due to the excessive use of nitrogen-based fertilizers and chemicals, poses significant risks to water quality and human health. Bioelectrochemical systems (BESs) have emerged as innovative solutions to complement traditional wastewater treatment methods for effective NO<sub>3</sub><sup>-</sup> removal, addressing the need for sustainable approaches to wastewater management at different scales. In this study, the NO<sub>3</sub><sup>-</sup> removal potential of a denitrifying double-chamber flow-through BES applied as post-treatment of an aerobic granular sludge system used for combined carbon and nitrogen removal was evaluated for 63 days under different feed (anodic and cathodic) and hydraulic retention time (HRT) (2–10 h) conditions. After 6 days of biomass acclimatization and at an HRT of 2 h, complete removal of N-NO<sub>3</sub><sup>−</sup> and N-NO<sub>2</sub><sup>−</sup> was achieved primarily through heterotrophic denitrification due to the presence of acetate. Nevertheless, using only the electrode as the electron source resulted in NO<sub>x</sub> (NO<sub>3</sub><sup>−</sup>+ NO<sub>2</sub><sup>−</sup>) removal efficiencies of up to 65 ± 16 %, with NO<sub>x</sub> concentrations remaining below the Italian standard for industrial effluent discharge into sewers (30 mg N-NO<sub>3</sub><sup>−</sup>·L<sup>−1</sup> and 0.6 mg N-NO<sub>2</sub><sup>−</sup>·L<sup>−1</sup>), demonstrating the good performance and applicability of the system even in the absence of organic carbon in the feed. The combined autotrophic and heterotrophic denitrification resulted in lower specific energy consumption compared to the use of autotrophic denitrification alone, ranging from 2.3·10<sup>−2</sup> to 9.6·10<sup>−5</sup> kWh·g NO<sub>x, removed</sub><sup>−1</sup> at an HRT of 2 h.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Exploring mixotrophic denitrification in a continuous double-chamber bioelectrochemical system treating nitrate-contaminated wastewater\",\"authors\":\"\",\"doi\":\"10.1016/j.jece.2024.114195\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Nitrate (NO<sub>3</sub><sup>-</sup>) pollution in aquatic environments, mainly due to the excessive use of nitrogen-based fertilizers and chemicals, poses significant risks to water quality and human health. Bioelectrochemical systems (BESs) have emerged as innovative solutions to complement traditional wastewater treatment methods for effective NO<sub>3</sub><sup>-</sup> removal, addressing the need for sustainable approaches to wastewater management at different scales. In this study, the NO<sub>3</sub><sup>-</sup> removal potential of a denitrifying double-chamber flow-through BES applied as post-treatment of an aerobic granular sludge system used for combined carbon and nitrogen removal was evaluated for 63 days under different feed (anodic and cathodic) and hydraulic retention time (HRT) (2–10 h) conditions. After 6 days of biomass acclimatization and at an HRT of 2 h, complete removal of N-NO<sub>3</sub><sup>−</sup> and N-NO<sub>2</sub><sup>−</sup> was achieved primarily through heterotrophic denitrification due to the presence of acetate. Nevertheless, using only the electrode as the electron source resulted in NO<sub>x</sub> (NO<sub>3</sub><sup>−</sup>+ NO<sub>2</sub><sup>−</sup>) removal efficiencies of up to 65 ± 16 %, with NO<sub>x</sub> concentrations remaining below the Italian standard for industrial effluent discharge into sewers (30 mg N-NO<sub>3</sub><sup>−</sup>·L<sup>−1</sup> and 0.6 mg N-NO<sub>2</sub><sup>−</sup>·L<sup>−1</sup>), demonstrating the good performance and applicability of the system even in the absence of organic carbon in the feed. The combined autotrophic and heterotrophic denitrification resulted in lower specific energy consumption compared to the use of autotrophic denitrification alone, ranging from 2.3·10<sup>−2</sup> to 9.6·10<sup>−5</sup> kWh·g NO<sub>x, removed</sub><sup>−1</sup> at an HRT of 2 h.</div></div>\",\"PeriodicalId\":15759,\"journal\":{\"name\":\"Journal of Environmental Chemical Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2024-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Environmental Chemical Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2213343724023261\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Environmental Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2213343724023261","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Exploring mixotrophic denitrification in a continuous double-chamber bioelectrochemical system treating nitrate-contaminated wastewater
Nitrate (NO3-) pollution in aquatic environments, mainly due to the excessive use of nitrogen-based fertilizers and chemicals, poses significant risks to water quality and human health. Bioelectrochemical systems (BESs) have emerged as innovative solutions to complement traditional wastewater treatment methods for effective NO3- removal, addressing the need for sustainable approaches to wastewater management at different scales. In this study, the NO3- removal potential of a denitrifying double-chamber flow-through BES applied as post-treatment of an aerobic granular sludge system used for combined carbon and nitrogen removal was evaluated for 63 days under different feed (anodic and cathodic) and hydraulic retention time (HRT) (2–10 h) conditions. After 6 days of biomass acclimatization and at an HRT of 2 h, complete removal of N-NO3− and N-NO2− was achieved primarily through heterotrophic denitrification due to the presence of acetate. Nevertheless, using only the electrode as the electron source resulted in NOx (NO3−+ NO2−) removal efficiencies of up to 65 ± 16 %, with NOx concentrations remaining below the Italian standard for industrial effluent discharge into sewers (30 mg N-NO3−·L−1 and 0.6 mg N-NO2−·L−1), demonstrating the good performance and applicability of the system even in the absence of organic carbon in the feed. The combined autotrophic and heterotrophic denitrification resulted in lower specific energy consumption compared to the use of autotrophic denitrification alone, ranging from 2.3·10−2 to 9.6·10−5 kWh·g NOx, removed−1 at an HRT of 2 h.
期刊介绍:
The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.