1
|
Wang Y, Gong Z, Xu X, Chen P, Zhao T, Hu W, Xu M, Li J, Huang S. Effects of various COD/NO ratios on NOx removal performance and microbial communities in a BTF-ABR integrated system. CHEMOSPHERE 2023; 321:138121. [PMID: 36775032 DOI: 10.1016/j.chemosphere.2023.138121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 02/05/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
In this study, we investigated the removal performance of NOx and stability of the biotrickling filter-anaerobic baffled reactor (BTF-ABR) integrated system at various chemical oxygen demand (COD)/NO ratios (12.18, 6.71, and 4.63 in stages 1, 2, and 3, respectively) under 3.5% O2 and 50 ± 0.5 °C conditions for the first time. The results showed that the maximum elimination capacity of NOx was 4.46, 8.16, and 11.58 g/(m3·h) in stages 1, 2, and 3, respectively. The minimum operating cost in terms of glucose was 4.79 g of glucose/g of NO. However, a COD/NO ratio of 12.18 resulted in a wastage of carbon sources, while a COD/NO ratio of 4.63 led to about 20 mg/m3 N2O emission at the end of the study. Highly bacteria diversity and positive co-occurrence networks at the COD/NO ratio of 6.71 were the main reasons for no intermediate accumulation or N2O emission. Analysis of real-time polymerase chain reaction (PCR) indicated that nirS and norB were more sensitive to the changes in the COD/NO ratios than other denitrifying genes, and the denitrifiers with nirS filled more ecological niches as the NOx increased. Furthermore, although the decrease in COD/NO ratio significantly impacted the microbial community structure, the NOx RE was stabilized at over 90% because the micro-aerobic environment produced by ABR combined highly diverse microbes and functions in BTF, as well as the coordinated expression of denitrifying genes. Achieving efficient, stable, and low-cost denitrification is feasible in this BTF-ABR integrated system.
Collapse
Affiliation(s)
- Yanling Wang
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China; School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Zerui Gong
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Xinyue Xu
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Pengfei Chen
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Tianyu Zhao
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| | - Wenzhe Hu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China.
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China.
| | - Jianjun Li
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China; School of Life Sciences and Engineering, Foshan University, Foshan, 528225, China.
| | - Shaobin Huang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, China.
| |
Collapse
|
2
|
Sharif HMA, Asif MB, Wang Y, Hou YN, Yang B, Xiao X, Li C. Spontaneous intra-electron transfer within rGO@Fe 2O 3-MnO catalyst promotes long-term NO x reduction at ambient conditions. JOURNAL OF HAZARDOUS MATERIALS 2023; 441:129951. [PMID: 36115094 DOI: 10.1016/j.jhazmat.2022.129951] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/29/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
Iron (Fe)-based catalysts are widely used for taming nitrogen oxides (NOx) containing flue gas, but the regeneration and long-term reusability remains a concern. The reusability can be acquired by external additives, and resultantly can not only increase the cost but can also add to process complexity as well as secondary pollutants. Herein, a self-sustainable material is designed to regenerate the catalyst for long-term reusability without adding to process complexity. The catalyst is based on reduced graphene-oxide impregnated by Fe2O3-MnO (rGO@Fe2O3-MnO; G-F-M) for spontaneous intra electron (e-)-transfer from Mn to Fe. The developed catalyst; G-M-F exhibited 93.7% NOx reduction, which suggests its high catalytic activity. The morphological and structure characterizations confirmed the Fe/Mn loading, contributing to e--transfer between Mn and Fe due to its conductivity. The synthesized G-F-M showed higher NOx reduction about 2.5 folds, than rGO@Fe2O3 (G-FeO) and rGO@MnOx (G-MnOx). The performance of G-M-F without and with an electrochemical system was also compared, and the difference was only 5%, which is an evidence of the spontaneous e- transfer between the Mn and Fe-NOx complex. The designed catalyst can be used for a long time without external assistance, and its efficiency was not affected significantly (<3.7%) in the presence of high oxygen contents (8%). The as-prepared G-M-F catalyst has great potential for executing a dual role NOx removal and self-regeneration of catalyst (SRC), promoting a sustainable remediation approach for large-scale applications.
Collapse
Affiliation(s)
- Hafiz Muhammad Adeel Sharif
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, PR China; School of Electronic Science and Engineering, State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, PR China
| | - Muhammad Bilal Asif
- Advanced Membranes and Porous Materials Center (AMPMC), Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
| | - Yuwei Wang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, PR China
| | - Ya-Nan Hou
- Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, PR China
| | - Bo Yang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - Xu Xiao
- School of Electronic Science and Engineering, State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, PR China
| | - Changping Li
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, PR China.
| |
Collapse
|
3
|
Jin J, Wang L, Sun W, Yang Z, Chen X, Wang H, Liu G. Membrane-less Paired Electrolysis for Cooperative Conversion of Complex NO in a Complexing Absorption System. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Jingjing Jin
- Department of Chemical Engineering, Dalian University of Technology, No. 2, Linggong Road, Dalian116024, China
| | - Lida Wang
- Department of Chemical Engineering, Dalian University of Technology, No. 2, Linggong Road, Dalian116024, China
- Dalian Key Laboratory of Flue Gas Purification and Waste Heat Utilization, Dalian116024, China
| | - Wen Sun
- Department of Chemical Engineering, Dalian University of Technology, No. 2, Linggong Road, Dalian116024, China
- Dalian Key Laboratory of Flue Gas Purification and Waste Heat Utilization, Dalian116024, China
| | - Zhengqing Yang
- Department of Chemical Engineering, Dalian University of Technology, No. 2, Linggong Road, Dalian116024, China
| | - Xu Chen
- Department of Chemical Engineering, Dalian University of Technology, No. 2, Linggong Road, Dalian116024, China
| | - Haiyan Wang
- Department of Chemical Engineering, Dalian University of Technology, No. 2, Linggong Road, Dalian116024, China
| | - Guichang Liu
- Department of Chemical Engineering, Dalian University of Technology, No. 2, Linggong Road, Dalian116024, China
- Dalian Key Laboratory of Flue Gas Purification and Waste Heat Utilization, Dalian116024, China
| |
Collapse
|
4
|
An B, Cai L, Liu T, Tian J, Liu Y. Selective photo-reduction of NO 2- to N 2 in the presence of Fe 2+ and citric acid. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 819:152963. [PMID: 35016941 DOI: 10.1016/j.scitotenv.2022.152963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/28/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
The photo-reduction of NO2- has received increasing attention due to its high photo-activity. However, the intermediate products of NO2- photo-reduction might contain NOx, which are also toxic pollutants. Herein, a novel strategy to selectively photo-reduce NO2- to N2 was proposed using Fe2+ and citric acid (H3Cit) as assistant to eliminate the formation of NOx. In this strategy, NO2- was firstly reduced to NO by the combination of photon, Fe2+ and H3Cit; the generated NO was then immediately captured by Fe2+-H3Cit to form Fe2+-H3Cit-NO complex; finally, H3Cit was activated by Fe3+ and •OH in Fe2+/H3Cit/UV/NO2- system to produce carbon dioxide anion radical (CO2•-), which could reduce the NO in Fe2+-H3Cit-NO complex to N2 with high efficiency and selectivity. The removal efficiencies of NO2- and TN were 98.6% and 87.5%, respectively, and the selectivity of N2 was 81.6% in Fe2+/H3Cit/UV/NO2- system after 60-min reaction at initial pH of 2.2, Fe2+ dosage of 3.0 mmol·L-1 and H3Cit dosage of 3.0 mmol·L-1. Based on the experimental results and spectral analysis, the mechanism of NO2- selective reduction in Fe2+/H3Cit/UV/NO2- system was proposed. Our finding provides a new way for wastewater denitrification and water purification.
Collapse
Affiliation(s)
- Baohua An
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
| | - Li Cai
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China.
| | - Ting Liu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
| | - Jing Tian
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
| | - Yong Liu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China; Key Laboratory of Treatment for Special Wastewater of Sichuan Province Higher Education System, Sichuan, Chengdu 610066, China.
| |
Collapse
|
5
|
Xu XJ, Wu YN, Xiao QY, Xie P, Ren NQ, Yuan YX, Lee DJ, Chen C. Simultaneous removal of NO X and SO 2 from flue gas in an integrated FGD-CABR system by sulfur cycling-mediated Fe(II)EDTA regeneration. ENVIRONMENTAL RESEARCH 2022; 205:112541. [PMID: 34915032 DOI: 10.1016/j.envres.2021.112541] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/29/2021] [Accepted: 12/05/2021] [Indexed: 06/14/2023]
Abstract
Chemical absorption-biological reduction (CABR) process is an attractive method for NOX removal and Fe(II)EDTA regeneration is important to sustain high NOX removal. In this study a sustainable and eco-friendly sulfur cycling-mediated Fe(II)EDTA regeneration method was incorporated in the integrated biological flue gas desulfurization (FGD)-CABR system. Here, we investigated the NOX and SO2 removal efficiency of the system under three different flue gas flows (100 mL/min, 500 mL/min, and 1000 mL/min) and evaluated the feasibility of chemical Fe(III)EDTA reduction by sulfide in series of batch tests. Our results showed that complete SO2 removal was achieved at all the tested scenarios with sulfide, thiosulfate and S0 accumulation in the solution. Meanwhile, the total removal efficiency of NOX achieved ∼100% in the system, of which 3.2%-23.3% was removed in spray scrubber and 76.7%-96.5% in EGSB reactor along with no N2O emission. The optimal pH and S2-/Fe(III)EDTA for Fe(II)EDTA regeneration and S0 recovery was 8.0 and 1:2. The microbial community analysis results showed that the cooperation of heterotrophic denitrifier (Saprospiraceae_uncultured and Dechloromonas) and iron-reducing bacteria (Klebsiella and Petrimonas) in EGSB reactor and sulfide-oxidizing, nitrate-reducing bacteria (Azoarcus and Pseudarcobacter) in spray scrubber contributed to the efficient removal of NOX in flue gas.
Collapse
Affiliation(s)
- Xi-Jun Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Yi-Ning Wu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China.
| | - Qing-Yang Xiao
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Peng Xie
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Nan-Qi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Yi-Xing Yuan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei, 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, 150090, China.
| |
Collapse
|
6
|
Wang Y, Li J, Huang S, Huang X, Hu W, Pu J, Xu M. Evaluation of NOx removal from flue gas and Fe(II)EDTA regeneration using a novel BTF-ABR integrated system. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125741. [PMID: 34088200 DOI: 10.1016/j.jhazmat.2021.125741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/22/2021] [Accepted: 03/22/2021] [Indexed: 06/12/2023]
Abstract
A promising process is under development for the removal of NOx and regeneration of Fe(II)EDTA in a novel biotrickling filter-anaerobic baffled reactor (BTF-ABR) integrated system at 50 ± 0.5 ℃. In this work, we investigated the NOx removal capacity of a BTF under different O2 concentrations (7.0 vol%, 5.25 vol% and 3.5 vol%), and tested the effect of an ABR on NOx removal and regeneration of Fe(II)EDTA. The results showed that the NOx removal capacity was significantly increased with the O2 concentration reduced from 7.0% to 3.5%. The microoxygen environment produced by the BTF-ABR integrated system was more conducive to the removal of NOx and regeneration of Fe(II)EDTA compared with that in the BTF. Real-time polymerase chain reaction (PCR) analysis showed that the coordinated expression of denitrification genes was the major reason for no N2O emission, along with no nitrate and nitrite accumulation. The 16S rRNA gene amplicon sequencing analysis showed that the cooperation of denitrifying bacteria (Klebsiella, Petrimonas, Rhodococcus and Ochrobactium) and iron-reducing bacteria (Klebsiella, Geobacter and Petrimonas) in the system was the key to the stable and efficient removal of NOx and the regeneration of Fe(II)EDTA simultaneously.
Collapse
Affiliation(s)
- Yanling Wang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Jianjun Li
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Shaobin Huang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China.
| | - Xingzhu Huang
- School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Wenzhe Hu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Jia Pu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510006, PR China.
| |
Collapse
|
7
|
Yang J, Liu S, Fu Q, Li-Chao N, Chen L. Hydrochloric Acid‐Assisted Regeneration of Cobalt Ethylenediamine for NO
x
Remediation in Flue Gas. Chem Eng Technol 2021. [DOI: 10.1002/ceat.202100129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jie Yang
- Chengdu University of Information Technology College of Resources and Environment 610225 Chengdu Sichuan China
| | - Shengyu Liu
- Chengdu University of Information Technology College of Resources and Environment 610225 Chengdu Sichuan China
| | - Qianwen Fu
- Chengdu University of Information Technology College of Resources and Environment 610225 Chengdu Sichuan China
| | - Nengzi Li-Chao
- Xichang University Academy of Economics and Environmental Sciences 615013 Xichang Sichuan China
| | - Li Chen
- Chengdu University of Information Technology College of Resources and Environment 610225 Chengdu Sichuan China
| |
Collapse
|