1
|
Cao K, Huang X, Wang CD, Yu JH, Gui WJ, Zhang S. Refractory degradable dissolved organic matter (R-DOM) driving nitrogen removal by the electric field coupled iron‑carbon biofilter (E-ICBF): Performance and microbial mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 936:173374. [PMID: 38795998 DOI: 10.1016/j.scitotenv.2024.173374] [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: 03/26/2024] [Revised: 05/11/2024] [Accepted: 05/18/2024] [Indexed: 05/28/2024]
Abstract
Researches on the advanced nitrogen (N) removal of municipal tailwater always overlooked the value of refractory degradable dissolved organic matter (R-DOM). In this study, a novel electric field coupled iron‑carbon biofilter (E-ICBF) was utilized to explore the performance and microbial changes with polyethylene glycol (PEG) as the representative R-DOM. Results demonstrated that the removal efficiencies of E-ICBF for nitrate nitrogen (NO3--N), ammonia nitrogen (NH4+-N), and total nitrogen (TN) improved by 28.76 %, 12.96 %, and 28.45 %, compared to quartz sand biofilter (SBF). Moreover, removal efficiencies of NO3--N and TN in E-ICBF with R-DOM went up by 12.11 % and 14.02 % compared to methanol. Additionally, both PEG and the electric field reduced the microbial richness and diversity. However, PEG promoted the increase of denitrifying bacteria abundance including unclassified_f_Comamonadaceae, Thauera, and unclassified_f_Gallionellaceae. The electric field improved the abundances of genes related to N removal (hao, nasC, nasA, nifH, nifD, nifK) and PEG further enhanced the effect. The abundances of key enzymes [EC:1.7.5.1], [EC:1.7.2.1], [EC:1.7.2.4], and [EC:1.7.2.5] decreased due to the addition of PEG and the electric field mitigated the negative influence. Additionally, the electric field changed relationships between microorganisms and pollutant removal, and improved interspecific relationships between denitrifying bacterial genera and other genera in E-ICBF.
Collapse
Affiliation(s)
- Kai Cao
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Xiao Huang
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China; Shenzhen Key Laboratory of Water Resources Utilization and Environmental Pollution Control, School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
| | - Cheng-Da Wang
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Jiang-Hua Yu
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Wen-Jing Gui
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Shuai Zhang
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
| |
Collapse
|
2
|
Zhang M, Wang J, Zhan X, Xu W, He M, Ma D, Yue Z. Degradation of thiocyanate by Fe/Cu/C microelectrolysis: Role of pre-magnetization and enhancement mechanism. ENVIRONMENTAL RESEARCH 2024; 252:118833. [PMID: 38599446 DOI: 10.1016/j.envres.2024.118833] [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: 12/15/2023] [Revised: 03/04/2024] [Accepted: 03/28/2024] [Indexed: 04/12/2024]
Abstract
Thiocyanate (SCN-), a non-volatile inorganic pollutant, is commonly found in various types of industrial wastewater, which is resistant to hydrolysis and has the potential to be toxic to organisms. Premagnetized iron-copper-carbon ternary micro-electrolytic filler (pre-Fe/Cu/C) was prepared to degrade SCN-. Pre-Fe/Cu/C exhibited the most significant enhancement effect on SCN- removal when magnetized for 5 min with an intensity of 100 mT, and the SCN- removal rate was the highest at an initial pH of 3.0 and an aeration rate of 1.6 L/min. The electrochemical corrosion and electron transfer in the pre-Fe/Cu/C system were confirmed through SEM, XPS, FTIR, XRD, and electrochemical tests. This resulted in the formation of more corrosion products and multiple cycles of Fe2+/Fe3+ and Cu0/Cu+/Cu2+. Additionally, density functional theory (DFT) calculations and electron paramagnetic resonance (EPR) were utilized to illustrate the oxygen adsorption properties of the materials and the participation of reactive oxygen species (1O2, ·O2-, and ·OH) in SCN- removal. The degradation products of SCN- were identified as SO42-, HCO3-, NH4+, and N2. This study introduced the use of permanent magnets for the first time to enhance Fe/Cu/C ternary micro-electrolytic fillers, offering a cost-effective, versatile, and stable approach that effectively effectively enhanced the degradation of SCN-.
Collapse
Affiliation(s)
- Min Zhang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Jin Wang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China; Anhui Engineering Research Center of Industrial Wastewater Treatment and Resource Recovery, Hefei University of Technology, Hefei, Anhui, 230009, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui, 230009, China.
| | - Xinyuan Zhan
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China; Anhui Engineering Research Center of Industrial Wastewater Treatment and Resource Recovery, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Wusong Xu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Maolin He
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Ding Ma
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China; Anhui Engineering Research Center of Industrial Wastewater Treatment and Resource Recovery, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Zhengbo Yue
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China; Anhui Engineering Research Center of Industrial Wastewater Treatment and Resource Recovery, Hefei University of Technology, Hefei, Anhui, 230009, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui, 230009, China.
| |
Collapse
|
3
|
Wang Z, Zeng Y, Tan Q, Shen Y, Shen L, Sun J, Zhao L, Lin H. Novel combination of iron-carbon composite and Fenton oxidation processes for high-concentration antibiotic wastewater treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120383. [PMID: 38382434 DOI: 10.1016/j.jenvman.2024.120383] [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: 12/13/2023] [Revised: 01/28/2024] [Accepted: 02/09/2024] [Indexed: 02/23/2024]
Abstract
The research presented herein explores the development of a novel iron-carbon composite, designed specifically for the improved treatment of high-concentration antibiotic wastewater. Employing a nitrogen-shielded thermal calcination approach, the investigation utilizes a blend of reductive iron powder, activated carbon, bentonite, copper powder, manganese dioxide, and ferric oxide to formulate an efficient iron-carbon composite. The oxygen exclusion process in iron-carbon particles results in distinctive electrochemical cells formation, markedly enhancing wastewater degradation efficiency. Iron-carbon micro-electrolysis not only boosts the biochemical degradability of concentrated antibiotic wastewater but also mitigates acute biological toxicity. In response to the increased Fe2+ levels found in micro-electrolysis wastewater, this research incorporates Fenton oxidation for advanced treatment of the micro-electrolysis byproducts. Through the synergistic application of iron-carbon micro-electrolysis and Fenton oxidation, this research accomplishes a significant decrease in the initial COD levels of high-concentration antibiotic wastewater, reducing them from 90,000 mg/L to about 30,000 mg/L, thus achieving an impressive removal efficiency of 66.9%. This integrated methodology effectively reduces the pollutant load, and the recycling of Fe2+ in the Fenton process additionally contributes to the reduction in both the volume and cost associated with solid waste treatment. This research underscores the considerable potential of the iron-carbon composite material in efficiently managing high-concentration antibiotic wastewater, thereby making a notable contribution to the field of environmental science.
Collapse
Affiliation(s)
- Zhe Wang
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China.
| | - Yansha Zeng
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China
| | - Qiyin Tan
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China
| | - Yue Shen
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China
| | - Liguo Shen
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China
| | - Jiahao Sun
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China
| | - Leihong Zhao
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China
| | - Hongjun Lin
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China.
| |
Collapse
|
4
|
Ma W, Zhang X, Han H, Shi X, Kong Q, Yu T, Zhao F. Overview of enhancing biological treatment of coal chemical wastewater: New strategies and future directions. J Environ Sci (China) 2024; 135:506-520. [PMID: 37778822 DOI: 10.1016/j.jes.2022.11.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 11/07/2022] [Accepted: 11/14/2022] [Indexed: 10/03/2023]
Abstract
Coal chemical wastewater (CCW) is a type of refractory industrial wastewater, and its treatment has become the main bottleneck restricting the sustainable development of novel coal chemical industry. Biological treatment is considered as an economical, effective and environmentally friendly technology for CCW treatment. However, conventional biological process is difficult to achieve the efficient removal of refractory organics because of CCW with the characteristics of composition complexity and high toxicity. Therefore, seeking the novel enhancement strategy appears to be a favorable solution for enhancing biological treatment efficiency of CCW. This review focuses on presenting a comprehensive picture about the exogenous enhancement strategies for CCW biological treatment. The performance and potential application of exogenous enhancement strategies, including co-metabolic substrate enhancement, biofilm filler enhancement, adsorption material enhancement and conductive mediator enhancement, were expounded. Meanwhile, the enhancing mechanisms of different strategies were comprehensively discussed from a biological perspective. Furthermore, the prospects of enhancement strategies based on the engineering performance, economic cost and environmental impact (3E) evaluation were introduced. And novel enhancement strategy based on "low carbon emissions", "resource recycling" and "water environment security" in the context of carbon neutrality was proposed. Taken together, this review provides technical reference and new direction to facilitate the regulation and optimization of typical industrial wastewater biological treatment.
Collapse
Affiliation(s)
- Weiwei Ma
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Xiaoqi Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China.
| | - Qiaoping Kong
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Tong Yu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Fei Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266520, China
| |
Collapse
|
5
|
Ma W, Zhang X, Han H, Shi X, Kong Q, Yu T, Zhao F. Novel strategy to enhance the biological treatment of coal chemical wastewater by nano-zero valent iron loaded fly ash-based activated carbon assisted activated sludge process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:110550-110561. [PMID: 37792192 DOI: 10.1007/s11356-023-29904-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 09/11/2023] [Indexed: 10/05/2023]
Abstract
Industrial waste as novel conductive mediator was applied for wastewater treatment as a novel strategy for both waste recycling and sustainable development of wastewater treatment. In this study, nanoscale zero valent iron-loaded fly ash-based activated carbon (nZVI@FABAC) was prepared and applied to enhancing activated sludge (AS) process for coal chemical wastewater (CCW) treatment. The results demonstrated that the removal efficiencies of COD and total phenols (TPh) in nZVI@FABAC/AS process reached about 83.96 and 85.17%, which increased 52.51 and 31.52% compared with the single AS process, respectively. And the acute toxic unit value of CCW was reduced by 88.24% after nZVI@FABAC/AS process treatment. The various functional bacteria including phenol-degrading bacteria (Comamonas and Acinetobacter), electroactive bacteria (Geobacter), and iron reduction bacteria (Geothrix) were enriched in the nZVI@FABAC/AS process, which provided various electron transfer pathways to improve the degradation of toxic organics in CCW. Accordingly, nZVI@FABAC/AS process provided a promising and sustainable way for industrial wastewater treatment.
Collapse
Affiliation(s)
- Weiwei Ma
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Xiaoqi Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China.
| | - Qiaoping Kong
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Tong Yu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Fei Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| |
Collapse
|
6
|
Wang C, Zheng J, Wang S, Zhou A, Kong X, Zhao B, Li H, Yue X. Efficient elimination of nonylphenol and 4-tert-octylphenol by weak electrical stimulated anaerobic microbial processes. CHEMOSPHERE 2023; 320:138085. [PMID: 36758818 DOI: 10.1016/j.chemosphere.2023.138085] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/06/2023] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
The investigation into the degradation of alkylphenol pollutants (APs) has become a hotspot due to their harmful effects on the environment and human health. In this study, microbial electrolysis cells (MECs) were used to degrade nonylphenol (NP) and 4-tert-octylphenol (4-tert-OP). The study found that the degradation rates of NP and 4-tert-OP for a 6-day period were 83.6% and 96.3%, respectively, which were 30.53% and 26.7% higher than those of the group without applied voltage. The double layer area in the degradation of 4-tert-OP was larger than that of NP, and the resistance exhibited by 4-tert-OP (87.47 Ω) in MEC was lower than that of NP (99.42 Ω). Meanwhile, NP had a greater effect on the bioenzyme activity than 4-tert-OP. GC-MS analysis showed that the degradation pathways of both pollutants mainly included oxidation and hydroxylation reactions. Furthermore, the microbial community analysis indicated that the main functional bacteria in NP degradation were Citrobacter, Desulfovibrio and Advenella, and those in 4-tert-OP degradation were Stenotrophomonas, Chryseobacterium, Dokdonella, and the key microbiomes underlying the cooperative relationship. The biotoxicity test indicated that the toxicity of residual substances was significantly reduced. Therefore, the MEC system is efficient and environmentally friendly and has broad application prospects in phenol refractory organics.
Collapse
Affiliation(s)
- Cuicui Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Jierong Zheng
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Sufang Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China.
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Xin Kong
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Bowei Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Houfen Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, PR China.
| |
Collapse
|
7
|
Zhou Y, Li H, Guo W, Liu H, Cai M. The synergistic effect between biofertility properties and biological activities in vermicomposting: A comparable study of pig manure. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116280. [PMID: 36183526 DOI: 10.1016/j.jenvman.2022.116280] [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: 07/04/2022] [Revised: 09/12/2022] [Accepted: 09/12/2022] [Indexed: 06/16/2023]
Abstract
Vermicomposting is a resource technology for managing animal excreta, whereas the internal relationships of the process are vital for its wide applications. The present study examined how macronutrient and micronutrient concentrations, microbial communities, and enzymatic activity of pig manure (PM) changed during the composting and vermicomposting processes and their internal interactions. The vermicomposting process increased macronutrients more significantly than composting (32.40% of total available nitrogen, 21.70% of total available phosphorous, and 12.70% of total available potassium). The vermicomposting reduced total organic carbon (7.91%), C/N ratio (61.35%), and humification index (56.47%) more than composting due to the quick decomposition of PM. After continual fertility optimization, the total microbial population, with the exception of total fungi, rose significantly to accelerate organics mineralization and improve macronutrients in vermicomposting compared to composting. Moreover, earthworm addition favored the stabilization of the PM containing higher concentrations of micronutrients after being catalyzed by the enhanced catalase activity and reduced sucrase activity after 90 days of vermicomposting. Principal component analysis and chord plots found that the generated vermicomposting products had higher fertility properties and biological activities induced by the synergistic effect of microorganisms and earthworms. These findings highlight vermicomposting is an eco-friendly management technology for processing PM and can be scaled up for agricultural applications.
Collapse
Affiliation(s)
- Yong Zhou
- Hubei Key Laboratory of Quality Control of Characteristic Fruits and Vegetables, College of Life Sciences and Technology, Hubei Engineering University, Xiaogan, 432000, PR China.
| | - Huankai Li
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China.
| | - Wenwei Guo
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Hui Liu
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Minggang Cai
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| |
Collapse
|
8
|
Wu S, Zhang X, Lu P, Zhang D. Copper removal and elemental sulfur recovery from fracturing flowback water in a microbial fuel cell with an extra electrochemical anode. CHEMOSPHERE 2022; 303:135128. [PMID: 35636600 DOI: 10.1016/j.chemosphere.2022.135128] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 04/22/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
Fracturing flowback water (FFW) from the shale gas exploitation resulted in environmental burden. FFW could be treated by a microbial fuel cell (MFC), but the challenge for the precipitation of ultrafine particles due to the supersaturation of sulfide remains to be addressed. Herein, we reported a Dual-anode MFC (DA-MFC), in which the FFW remediation and elemental sulfur recovery could be performed by regulating potential of the electrochemical anode. The removal of COD and sulfate was 70.0 ± 1.2% and 75.5 ± 0.4% in DA-MFCs by controlling potential at -0.1 V (vs. SHE) for 36 h. Meanwhile, the efficiency of copper removal and elemental sulfur recovery was up to 99.9 ± 0.5% and 75.6 ± 1.8%, respectively, which was attributed by the electrochemical oxidation of sulfide to elemental sulfur. Trichococcus, unclassified Prolixibacteraceae and unclassified Cloacimonadales enriched on the bioanodes of DA-MFCs were sensitive to potential regulation and favorable for degrading complex organics. UnclassifiedSynergistaceae, Desulfobacterium, Desulfovibrio, unclassified bacteria and Syner-01 was conducive to sulfate removal. Moreover, the elimination of Azoarcus due to potential regulation suppressed the biological oxidation of sulfide. Thus, organics were efficiently removed through the biological oxidation and sulfate reduction on bioanode, the copper ions were combined with the sulfide from sulfate reduction to precipitate effectively, and then the excessive sulfide in the system was converted into elemental sulfur attached on the electrochemical anode. The results provide new sights on bio-electrochemical technology for treatment of wastewater containing complex organics, heavy metals and sulfates.
Collapse
Affiliation(s)
- Shanshan Wu
- Department of Environmental Science, Chongqing University, Chongqing, 400044, China.
| | - Xiaoting Zhang
- Department of Environmental Science, Chongqing University, Chongqing, 400044, China; College of Resources and Environment, Southwest University, Chongqing, 400715, China.
| | - Peili Lu
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Department of Environmental Science, Chongqing University, Chongqing, 400044, China.
| | - Daijun Zhang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Department of Environmental Science, Chongqing University, Chongqing, 400044, China.
| |
Collapse
|
9
|
Yang S, Wen Q, Chen Z. Biochar induced inhibitory effects on intracellular and extracellular antibiotic resistance genes in anaerobic digestion of swine manure. ENVIRONMENTAL RESEARCH 2022; 212:113530. [PMID: 35609652 DOI: 10.1016/j.envres.2022.113530] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/16/2022] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
Distribution of intracellular (iARGs) and extracellular ARGs (eARGs) in manure anaerobic digestion (AD) process coupled with two types of biochar (BC and BP) were investigated. And the effects of biochar on the conjugation transfer of ARGs were explored by deciphering the interaction of biochar with bacterial stress responses, physiological metabolism and antibiotic resistances. Results showed that AD process could effectively remove all the detected eARGs with efficiency of 47.4-98.2%. The modified biochar (BP) with larger specific surface area (SSA) was propitious to decrease the absolute copy number of extracellular resistance genes. AD process could effectively remove iARGs by inhibiting the growth of host bacteria. The results of structural equation models (SEM) indicated that biochar put indirect influences on the fate of ARGs (λ = -0.23, P > 0.05). Analysis on oxidative stress levels, antioxidant capacity, DNA damage-induced response (SOS) response and energy generation process demonstrated that biochar induced the oxidative stress response of microorganisms and enhanced the antioxidant capacity of bacteria. The elevated antioxidant capacity negatively affected SOS response, amplified cell membrane damage and further weakened the energy generation process, resulted in the inhibition of horizontal transfer of ARGs.
Collapse
Affiliation(s)
- Shuo Yang
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Qinxue Wen
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Zhiqiang Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China; School of Civil Engineering, Lanzhou University of Technology, Lanzhou, 730070, PR China.
| |
Collapse
|
10
|
Liu Y, Jiang Z, Fu J, Ao W, Ali Siyal A, Zhou C, Liu C, Dai J, Yu M, Zhang Y, Jin Y, Yuan Y, Zhang C. Iron-biochar production from oily sludge pyrolysis and its application for organic dyes removal. CHEMOSPHERE 2022; 301:134803. [PMID: 35508264 DOI: 10.1016/j.chemosphere.2022.134803] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 04/07/2022] [Accepted: 04/28/2022] [Indexed: 06/14/2023]
Abstract
In this study, a single-step pyrolysis approach was developed to directly convert oily sludge (OS) with high iron content into a magnetic iron-char catalyst for organic dyes removal. Magnetic iron-char catalysts were employed to degrade crystal violet (CV), methylene blue (MB), and sunset yellow (SY). The OC800 iron-char catalyst prepared from OS was not only rich in iron (mainly stable Fe3O4), but also showed favorable pore structures. Effects of operation parameters like temperature, H2O2 dosage, and pH on dye removal based on Fenton degradation were examined. In OC800 Fenton system (0.5 mL H2O2, 500 mg/L dye concentration, and pH = 2 in 50 mL solution), the maximum dye removal capacities of SY, CV, and MB were 83.61, 639.19, and 414.25 mg/g, respectively. In dyes degradation experiments, the prepared catalyst could be reused (more than 3 successive cycles) due to higher stability and less leaching of iron. One-step pyrolysis of OS with high iron content thereby represents a promising approach to transform sludge waste to functional biochar that removes hazardous dyes.
Collapse
Affiliation(s)
- Yang Liu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhihui Jiang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jie Fu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wenya Ao
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Asif Ali Siyal
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chunbao Zhou
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chenglong Liu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jianjun Dai
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Mengyan Yu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yingwen Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yajie Jin
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yanxin Yuan
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Changfa Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| |
Collapse
|
11
|
Li Y, Wang M, Qian J, Hong Y, Huang T. Enhanced degradation of phenolic compounds in coal gasification wastewater by an iron‑carbon micro-electric field coupled with anaerobic co-digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 819:151991. [PMID: 34848265 DOI: 10.1016/j.scitotenv.2021.151991] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/22/2021] [Accepted: 11/22/2021] [Indexed: 06/13/2023]
Abstract
Coal gasification wastewater contains many refractory and toxic pollutants, especially high concentrations of total phenols, which are difficult to degrade by microorganisms. The aim of our study is to explore the anaerobically enhanced degradation of coal gasification wastewater by an iron‑carbon micro-electric field coupled with anaerobic co-digestion. The optimal ratio of activated carbon to iron and the optimal dosage of co-substrate (glucose = 1500 mg/L) were investigated by batch tests. In the long-term operation of the iron‑carbon reactor, 1500 mg/L glucose was added into the influent, and carbon and iron in a ratio of 2:1 were added to the anaerobic sludge. The average effluent COD and total phenols concentrations were kept at approximately 455 and 56.3 mg/L, respectively, and removal rates of both reached 90% after treatment with the iron‑carbon micro-electric field coupled with anaerobic co-digestion in the iron‑carbon reactor. Moreover, compared with the control reactor, the methane production from the iron‑carbon reactor increased to 200 mL/day, with an increase in the methane production rate by 90%. Microbial community analysis indicated that hydrogenotrophic methanogens were enriched, and syntrophic metabolism via interspecies hydrogen transfer was enhanced. Direct interspecies electron transfer might occur between the potential electroactive bacteria Clostridium, Bacteroidetes, and Anaerolinea and the methanogens Methanosaeta, Methanobacterialies, and Methanobacterium for syntrophic metabolism through the iron‑carbon process coupled with anaerobic co-digestion.
Collapse
Affiliation(s)
- Yajie Li
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China
| | - Mengyan Wang
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China
| | - Jingli Qian
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China
| | - Yaoliang Hong
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China
| | - Tianyin Huang
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China.
| |
Collapse
|
12
|
Ren D, Huang Y, Li S, Wang Z, Zhang S, Zhang X, Gong X. Removal mechanism of persistent organic pollutants by Fe-C micro-electrolysis. ENVIRONMENTAL TECHNOLOGY 2022; 43:1050-1067. [PMID: 32838686 DOI: 10.1080/09593330.2020.1814426] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 08/14/2020] [Indexed: 06/11/2023]
Abstract
The degradation of persistent organic pollutants (POPs) in the simulated wastewaters was investigated by Fe-C micro-electrolysis system. With phenanthrene (PHE) and 2,4-dichlorophenol (2,4-DCP) as target pollutants, different iron-carbon (Fe-C) micro-electrolysis systems have been established. The effects of initial pH, Fe/C mass ratio, and intake air flow on the degradation and mineralization of PHE and 2,4-DCP were studied. At the initial pH of 5.0, Fe/C of 1.5:1, and an aeration flow rate of 1.5 L/min, after 120 min of reaction, the removal efficiency of FHE and COD was 94.3% and 73%, respectively. Under the conditions of initial pH is 3.0, Fe/C is 1:2, aeration flow rate of 1.5 L/min, and reaction time of 90 min, the best removal efficiency of 2,4-DCP can be obtained in the Fe-C micro-electrolysis system as 97% and COD removal efficiency can reach 76%. The results of kinetic studies show that the Fe-C micro-electrolysis process of PHE and 2,4-DCP follows pseudo-first-order kinetics. Commercial activated carbon (AC) was used for comparison under the same condition. The results indicated that the removal rate of organic pollutants and chemical oxygen demand (COD) of Fe-C micro-electrolysis were superior to that of AC. Analyze the structure of iron after reaction by SEM and XRD. The degradation pathway and mechanism for PHE and 2,4-DCP were proposed based on LC-MS analyses of treated wastewater.
Collapse
Affiliation(s)
- Dajun Ren
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
- Hubei Key Laboratory for Efficient Utilization and Agglomeration of metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| | - Yongwei Huang
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
- Hubei Key Laboratory for Efficient Utilization and Agglomeration of metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| | - Sheng Li
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
- Hubei Key Laboratory for Efficient Utilization and Agglomeration of metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| | - Zhaobo Wang
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
- Hubei Key Laboratory for Efficient Utilization and Agglomeration of metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| | - Shuqin Zhang
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
- Hubei Key Laboratory for Efficient Utilization and Agglomeration of metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| | - Xiaoqing Zhang
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
- Hubei Key Laboratory for Efficient Utilization and Agglomeration of metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| | - Xiangyi Gong
- College of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, People's Republic of China
- Hubei Key Laboratory for Efficient Utilization and Agglomeration of metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan, People's Republic of China
| |
Collapse
|
13
|
Pretreatment of Rubber Additives Processing Wastewater by Aluminum–Carbon Micro-Electrolysis Process: Process Optimization and Mechanism Analysis. WATER 2022. [DOI: 10.3390/w14040582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
The pretreatment of rubber additives processing wastewater was performed by Al/AC micro-electrolysis (ME). The single-factor experiments for the removal of COD and chroma were investigated. The Box-Behnken Design (BBD) was also applied to optimize the experimental conditions, and the fitted response surface model supplied highly significant quadratic models for the process. The COD removal efficiency reached 51.6% at an initial pH of 9.8, Al scrap dosage of 98.6 g L−1, Al/AC mass ratio of 0.26, and reaction time of 176 min, which was reasonably consistent with the predicated value of 51.9%. Moreover, we proposed a reaction mechanism of the process for the degradation of organic contaminants, and found that the removal of COD and chroma were mainly ascribed to the combination of active hydrogen [H] with strong chemical reactivity and flocculation of aluminum hydroxide. All these results showed that Al/AC ME is a promising pretreatment technique for this wastewater.
Collapse
|
14
|
Zhang W, Xia R, Wang H, Pu S, Jiang D, Hao X, Bai L. Swine wastewater treatment by combined process of iron carbon microelectrolysis-physical adsorption-microalgae cultivation. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 85:914-924. [PMID: 35166710 DOI: 10.2166/wst.2021.619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Combined treatments were designed based on iron-carbon micro-electrolysis treatment (ICME), physical adsorption (PA) with zeolite (Z) or vermiculite (V) and microalgae cultivation (MC, Chlorella vulgaris) for removing pollutants from swine wastewater (SW): ICME + MC (IM), ICME + Z + MC (IZM) and ICME + V + MC (IVM). Results showed that the minimum total nitrogen (TN) of 43.66 mg L-1, NH4+-N of 1.33 mg-1 and total phosphorus (TP) of 0.14 mg-1 were obtained by IVM, while the minimum chemical oxygen demand (COD) was 105 mg-1 via IM. During the process of combined treatments, ICME contributed most to the removal of TN (84.52% by IZM), TP (97.78% by IVM and IZM) and COD (62.44% by IVM), and maximum NH4+-N removal (55.64%) was obtained by MC procedure in IM process. Vermiculite performed better than zeolite during all the combined treatments. Besides, the maximum cell dry weight (CDW, 0.74 g-1) of C. vulgaris was obtained by IM on day 13. The results provide an efficient integrated method for swine wastewater treatment.
Collapse
Affiliation(s)
- Wenjin Zhang
- Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China E-mail: ; Chongqing Academy of Animal Sciences, Scientific Observation and Experiment Engineering in Southwest for Ministry of Agriculture and Rural Affairs, Chongqing 402460, China
| | - Rongbin Xia
- Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China E-mail:
| | - Hao Wang
- Chongqing Academy of Animal Sciences, Scientific Observation and Experiment Engineering in Southwest for Ministry of Agriculture and Rural Affairs, Chongqing 402460, China
| | - Shihua Pu
- Chongqing Academy of Animal Sciences, Scientific Observation and Experiment Engineering in Southwest for Ministry of Agriculture and Rural Affairs, Chongqing 402460, China
| | - Dongmei Jiang
- Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China E-mail:
| | - Xiaoxia Hao
- Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China E-mail:
| | - Lin Bai
- Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China E-mail:
| |
Collapse
|
15
|
Zhang Y, Li Y, Wang J, Wang X, Liu Y, Wang S, Kong F. Interactions of chlorpyrifos degradation and Cd removal in iron-carbon-based constructed wetlands for treating synthetic farmland wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 299:113559. [PMID: 34438309 DOI: 10.1016/j.jenvman.2021.113559] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 08/09/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
Pesticide and heavy metal contaminants, such as chlorpyrifos (CP) and cadmium (Cd) in farmland drainage had caused the water pollution and attracted extensive concerns around the world. The incorporation of zeolite-based iron-carbon (ZB-IC) into constructed wetlands (CWs) was prepared to simultaneously remove chlorpyrifos (CP) and cadmium (Cd) in farmland drainage, and the interaction of CP degradation and Cd removal was investigated. Laboratory simulated experiments were carried out in this study, and the results presented that the removal efficiencies of CP and Cd by ZB-IC coupled CWs (ZB-IC-CW) were 99.55% and 98.59%, respectively, which were much higher than that of the zeolite-based (ZB) CWs (CP = 92.99%; Cd = 63.54%). The removal mechanism of CP and Cd by ZB-IC substrate was mainly attributed to electron transfer, which occurred from iron corrosion and hydrogen generation process. In addition, CP could act as carbon source to promote denitrification process. Microbial analysis revealed that the relative abundances of CP-resistant bacteria (Firmicutes, Clostridia and Acetobacterium), Cd-resistant bacteria (Bacteroidetes) and denitrifying bacteria (Proteobacteria and Patescibacteria) were dramatically increased due to the addition of ZB-IC. The higher czcA gene and opd gene in ZB-IC-CW demonstrated that the addition of CP played a positive role in Cd removal, while Cd showed slightly affect to CP removal.
Collapse
Affiliation(s)
- Yu Zhang
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China
| | - Yue Li
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China
| | - Junru Wang
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China
| | - Xiaoyan Wang
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China
| | - Yonglin Liu
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China
| | - Sen Wang
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China.
| | - Fanlong Kong
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China.
| |
Collapse
|
16
|
Cheng G, Zhang Y, Sun L, Wan J, Li Z, Dang C, Fu J. Enhanced degradation of reactive brilliant red X-3B by photocatalysis integrated with micro-electrolysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:49899-49912. [PMID: 33945093 DOI: 10.1007/s11356-021-14205-w] [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: 12/14/2020] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
The microwave electrodeless lamp UV photocatalysis (MWUV) integrated with iron carbon micro-electrolysis (ME) was applied to degrade reactive brilliant red X-3B. In the present study, the removal rate of X-3B by MWUV/ME was 95%, which was significantly higher than 56% of MWUV and 62% of ME system. The experiment results demonstrated a synergistic effect in MWUV/ME system, wherein the ME system played an important role in color removal and the formation of ·OH in photocatalysis contributed most for the mineralization of X-3B and its intermediates. The removal efficiency of TOC was 32%, 7.5%, and 59.5% under MWUV, ME, and MWUV/ME processes at the end of the reaction, respectively. The Fe3+ existed in the system was an enhancer of producing ·OH via self-generation of ·OH by UV irradiation or improving the separation of electron-hole in photocatalysis by capturing the electrons. Therefore, the combined treatment of MWUV and ME system has the potential of synergistic effect compared to the separate process. Lowering the initial solution pH and increasing the iron filing dosage and dissolved oxygen were beneficial for the enhancement of degradation efficiency. The inorganic anions showed a diversity influencing the degradation of X-3B. NO3-, CO32-, and SO42- (at higher concentration) promoted the degradation reaction, while Cl- had non-significant effect.
Collapse
Affiliation(s)
- Gong Cheng
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
- Environmental Engineering Center, Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, China
- Engineering Research Center for Cleaner Production of Textile Dyeing and Printing under Ministry of Education, Wuhan Textile University, Wuhan, 430073, China
| | - Yibo Zhang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Lei Sun
- Environmental Engineering Center, Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, China
| | - Jing Wan
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Zhang Li
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Chenyuan Dang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jie Fu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
| |
Collapse
|
17
|
Lou Z, Song Y, Shao B, Hu J, Wang J, Yu J. Pre-electrochemical treatment combined with fixed bed biofilm reactor for pyridine wastewater treatment: From performance to microbial community analysis. BIORESOURCE TECHNOLOGY 2021; 319:124110. [PMID: 32977091 DOI: 10.1016/j.biortech.2020.124110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/02/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
To overcome the high biotoxicity and poor biodegradability of pyridine and its derivatives, a pre-electrochemical treatment combined with fixed bed biofilm reactor (EC-FBBR) was designed for multi-component stream including pyridine (Pyr), 3-cyanopyridine (3-CNPyr), and 3-chloropyridine (3-ClPyr). The EC-FBBR system could simultaneously degrade these pollutants with a mineralization efficiency of 90%, especially for the persistent 3-ClPyr. Specifically, the EC could partially degrade all pollutants, and allow them to be completely destructed in FBBR. With EC off, Rhodococcus (35.5%) became the most abundant genus in biofilm, probably due to its high tolerance to 3-ClPyr. With EC on, 3-ClPyr was reduced to an acceptable level, thus Paracoccus (21.1%) outcompeted among interspecies competition with Rhodococcus and became the dominant genus. Paracoccus was considered to participate in the subsequent degradation for the residual 3-ClPyr, and led to the complete destruction for all pollutants. This study proposed promising combination for effective treatment of multi-component pyridine wastewater.
Collapse
Affiliation(s)
- Zimo Lou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China; College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yongquan Song
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Bijuan Shao
- Report Department, Zhejiang Fenghe Detection Technology Co., Ltd., Jinhua 322000, China
| | - Jun Hu
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jiazhe Wang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jianming Yu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China; College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
| |
Collapse
|
18
|
Xu Z, Gao Y, Sun Z, Zhang D, Zhou Y, Chen W. New insights into the reinforced reduction performance of Fe 0/C internal electrolysis activated by persulfate for p-nitrophenol removal. CHEMOSPHERE 2020; 254:126899. [PMID: 32957294 DOI: 10.1016/j.chemosphere.2020.126899] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/24/2020] [Accepted: 04/24/2020] [Indexed: 06/11/2023]
Abstract
In this study, the reduction of iron-carbon internal electrolysis was reinforced by persulfate for p-nitrophenol removal. The effects of persulfate dosage, initial pH and iron-carbon mass ratio were comprehensively studied in batch experiments. In the system of iron-carbon internal electrolysis coupled with persulfate, the iron-carbon internal electrolysis and persulfate had a significant mutual influence, exhibiting a wide range of pH in the treatment process. Moreover, the coupled system also showed the remarkable removal and degradation efficiency of p-nitrophenol according to the contrast experiments. The satisfactory results should be attributed to the potential reduction of iron-carbon internal electrolysis, which was stimulated by persulfate to transform the nitro group to the amine group, accompanying the subsequent oxidation. Furthermore, persulfate possessed the ability that the dynamically destructive effect on external and internal of Fe0 and the scavenging action on activated carbon, effectively strengthening the potential energy for release and transfer of reductive substances. Both HO• and SO4•- as the main free radicals were formed to mineralize the intermediates in the coupled system. These findings indicate that the system of iron-carbon internal electrolysis coupled with persulfate can be a promising strategy for the treatment of the toxic and refractory wastewater.
Collapse
Affiliation(s)
- Zhihua Xu
- School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Rd., Shanghai, 200093, PR China.
| | - Yuquan Gao
- School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Rd., Shanghai, 200093, PR China
| | - Zhenhua Sun
- School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Rd., Shanghai, 200093, PR China
| | - Daofang Zhang
- School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Rd., Shanghai, 200093, PR China
| | - Yuwei Zhou
- School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Rd., Shanghai, 200093, PR China
| | - Weifang Chen
- School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Rd., Shanghai, 200093, PR China.
| |
Collapse
|
19
|
Tian H, Xu X, Qu J, Li H, Hu Y, Huang L, He W, Li B. Biodegradation of phenolic compounds in high saline wastewater by biofilms adhering on aerated membranes. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122463. [PMID: 32193113 DOI: 10.1016/j.jhazmat.2020.122463] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 06/10/2023]
Abstract
High saline phenolic wastewater is a typical toxic and refractory industrial wastewater. A single membrane-aerated biofilm reactor (MABR) was used to treat wastewater containing phenol, p-nitrophenol and hydroquinone under increasing phenolic loading and salinity conditions. More than 95 % of phenolic compounds were removed, and a removal efficiency of 8.9 g/m2 d for total phenolic (TP) contents was achieved under conditions with 32 g/L of salt and 763 mg/L of influent TP contents. The microbial diversity, structure and function of a biofilm exposed to different conditions were investigated by high-throughput 16S rRNA gene sequencing and metagenomics. Salinity and specific TP loading substantially affected the bacterial community. Gammaproteobacteria, Actinobacteria and Betaproteobacteria contributed more to initial phenolic compound degradation than other classes, with Pseudomonas and Rhodococcus as the main contributing genera. The key phenolic-degrading genes of different metabolic pathways were explored, and their relative abundance was strengthened with increasing phenolic loading and salinity. The diverse cooperation and competition patterns of these microorganisms further promoted the high removal efficiency of multiple phenolic contaminants in the biofilms. These results demonstrate the feasibility of MABR for degrading multiple phenolic compounds in high saline wastewater.
Collapse
Affiliation(s)
- Hailong Tian
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Xingjian Xu
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia 137400, PR China
| | - Jianhang Qu
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China.
| | - Haifeng Li
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Yanzhuo Hu
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Liang Huang
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Wentian He
- Shanghai Majorbio Bio-pharm Technology Co.,Ltd, Shanghai 201203, PR China
| | - Baoan Li
- State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, PR China; College of Environmental Science and Engineering, Nankai University, Tianjin 300072, PR China.
| |
Collapse
|
20
|
Gao Y, Kong X, Zhou A, Yue X, Luo Y, Defemur Z. Enhanced degradation of quinoline by coupling microbial electrolysis cell with anaerobic digestion simultaneous. BIORESOURCE TECHNOLOGY 2020; 306:123077. [PMID: 32155565 DOI: 10.1016/j.biortech.2020.123077] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 06/10/2023]
Abstract
In this study, the feasibility of quinoline-wastewater treatment was investigated in a coupled microbial electrolysis cell and anaerobic digestion system (MEC-AD). Improved degradation and enhanced mineralization of quinoline were obtained, and the optimal voltage was determined to be 1.0 V. Effective removal of quinoline at relative high concentration, and a 1.5-fold increase in methane production were achieved. The results indicated that the MEC-AD could simultaneously remove carbon and nitrogen from quinoline. Gas chromatography-mass spectrometry analysis identified 2-hydroxyquinoline and 8-hydroxycoumarin as the intermediates of quinoline. The formation and degradation of metabolites were rapid, and they did not accumulate in the MEC-AD. The results of microbial community structure analysis demonstrated that the functional species were enriched and coexisted, and that the dominant bacterial genera were SM1A02, Comamonas, Desulfovibrio, Geobacter, and Actinomarinales_norank; the dominant archaeal genera were Methanocorpusculum and Nitrosoarchaeum. Furthermore, the applied current played a selective role in the enrichment of microorganisms.
Collapse
Affiliation(s)
- Yanjuan Gao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Xin Kong
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China; State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China; Shanxi Engineer Research Institute of Sludge Disposition and Resources, Taiyuan University of Technology, Taiyuan 030024, PR China.
| | - Yanhong Luo
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Zafiry Defemur
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| |
Collapse
|
21
|
Swain G, Sonwani RK, Giri BS, Singh RS, Jaiswal RP, Rai BN. Collective removal of phenol and ammonia in a moving bed biofilm reactor using modified bio-carriers: Process optimization and kinetic study. BIORESOURCE TECHNOLOGY 2020; 306:123177. [PMID: 32192956 DOI: 10.1016/j.biortech.2020.123177] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/06/2020] [Accepted: 03/07/2020] [Indexed: 06/10/2023]
Abstract
The performance of a moving bed biofilm reactor (MBBR) with bio-carriers made of polypropylene-polyurethane foam (PP-PUF) was evaluated for the collective removal of phenol and ammonia. Three independent variables, including pH (5.0-8.0), retention time (2.0-12.0 h), and airflow rate (0.8-3.5 L/min) were optimized using central composite design (CCD) of response surface methodology (RSM). The maximum removal of phenol and ammonia was obtained to be 92.6, and 91.8%, respectively, in addition to the removal of 72.3% in the chemical oxygen demand (COD) level at optimum conditions. First-order and second-order kinetic models were analyzed to evaluate the pollutants removal kinetics in a MBBR. Finally, a second-order model was found to be appropriate for predicting reaction kinetics. The values of second-order rate constants were obtained to be 2.35, 0.25, and 1.85 L2/gVSS gCOD h for phenol, COD, and ammonia removal, respectively.
Collapse
Affiliation(s)
- Ganesh Swain
- Department of Chemical Engineering & Technology IIT (BHU), Varanasi 221005, Uttar Pradesh, India
| | - R K Sonwani
- Department of Chemical Engineering & Technology IIT (BHU), Varanasi 221005, Uttar Pradesh, India
| | - B S Giri
- Department of Chemical Engineering & Technology IIT (BHU), Varanasi 221005, Uttar Pradesh, India
| | - R S Singh
- Department of Chemical Engineering & Technology IIT (BHU), Varanasi 221005, Uttar Pradesh, India
| | - Ravi P Jaiswal
- Department of Chemical Engineering & Technology IIT (BHU), Varanasi 221005, Uttar Pradesh, India
| | - B N Rai
- Department of Chemical Engineering & Technology IIT (BHU), Varanasi 221005, Uttar Pradesh, India.
| |
Collapse
|
22
|
Tian H, Hu Y, Xu X, Hui M, Hu Y, Qi W, Xu H, Li B. Enhanced wastewater treatment with high o-aminophenol concentration by two-stage MABR and its biodegradation mechanism. BIORESOURCE TECHNOLOGY 2019; 289:121649. [PMID: 31220766 DOI: 10.1016/j.biortech.2019.121649] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 06/09/2023]
Abstract
A two-stage bench-scale membrane-aerated biofilm reactor (MABR) was developed to treat wastewater containing high o-aminophenol (OAP) content. Long-term process showed that MABR-1 can achieve the removal rates of 17.6 g OAP/m2 d and 29.4 g COD/m2 d. MABR-2 can effectively perform more than 90% TN removal with the addition of external glucose. Pseudomonas and Nitrosomonas were the key functional genera in MABR-1 and MABR-2, respectively. Functional genes related to OAP degradation, including amnA,B,D, dmpC,H, mhpD,E,F, and bphH,I,J, were detected, and the involved enzymes were predicted. The OAP-degrading species and functional contribution analysis indicated that OAP can be metabolized by a single Pseudomonas or by the synergistic effects of bacteria, mainly including Cupriavidus, Thauera, unclassified Sphingomonadaceae, Lysobacter, and Azotobacter or by the cooperation of all the bacteria above. These diversified patterns guaranteed the high efficiency for OAP removal in MABR when treating wastewater with high OAP concentration.
Collapse
Affiliation(s)
- Hailong Tian
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Yanzhuo Hu
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Xingjian Xu
- Hinggan League Academy of Agriculture and Animal Husbandry, Ulanhot, Inner Mongolia, 137400, PR China
| | - Ming Hui
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Yuansen Hu
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Wanxin Qi
- College of Bioengineering, Henan University of Technology, Zhengzhou 450001, PR China
| | - Hongru Xu
- Horqin Right Front Banner Agriculture Research Institute, Hinggan League, Inner Mongolia, 137713, PR China
| | - Baoan Li
- State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, PR China.
| |
Collapse
|
23
|
Zhang Z, Han Y, Xu C, Han H, Zhong D, Zheng M, Ma W. Effect of low-intensity direct current electric field on microbial nitrate removal in coal pyrolysis wastewater with low COD to nitrogen ratio. BIORESOURCE TECHNOLOGY 2019; 287:121465. [PMID: 31121448 DOI: 10.1016/j.biortech.2019.121465] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/04/2019] [Accepted: 05/11/2019] [Indexed: 06/09/2023]
Abstract
The coupling of bioelectrochemical system with the biological denitrification process (R1) was constructed for nitrate removal in coal pyrolysis wastewater (CPW) and the effect of low-intensity direct current electric field was investigated. Compared with control reactor (R2), the total nitrogen (TN) removal efficiency in R1 at the optimized voltage of 0.9 V was 94.20 ± 2.14%, which was 14.42% higher than that in R2. The biofilm on the cathode of R1 enhanced the nitrate reducing, however, nitrite was only reduced by bacteria in suspended activated sludge, which was confirmed by cyclic voltammetry measurement (CV). Microbial community network analysis revealed that exoelectrogenic bacteria of Pseudomonas was enriched on the anode of R1, and the "small world", including Zoogloea, Pseudomonas and Arenimonas, was established under the stimulation of voltage. Therefore, Pseudomonas transferred electron to anode, and Arenimonas could utilize electron from anode to reduce nitrate, which enhanced TN removal in R1.
Collapse
Affiliation(s)
- Zhengwen Zhang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Yuxing Han
- School of Engineering, South China Agricultural University, Guangzhou 510642, China
| | - Chunyan Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Dan Zhong
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China.
| | - Mengqi Zheng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Weiwei Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| |
Collapse
|
24
|
Xiao M, Ma H, Sun M, Yin X, Feng Q, Song H, Gai H. Characterization of cometabolic degradation of p-cresol with phenol as growth substrate by Chlorella vulgaris. BIORESOURCE TECHNOLOGY 2019; 281:296-302. [PMID: 30826515 DOI: 10.1016/j.biortech.2019.02.079] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 06/09/2023]
Abstract
To investigate the potential application of Chlorella vulgaris in the treatment of coal gasification wastewater, the characteristics of phenol and p-cresol cometabolism by Chlorella vulgaris were studied, including phenol degradation, ammonia nitrogen removal, antioxidant enzyme activities, and phenol hydroxylase activity. The results showed that the highest tolerable concentrations of phenol and p-cresol for Chlorella vulgaris were 800 and 400 mg/L, respectively. During cometabolism, phenol at low concentrations (100 mg/L) significantly promoted the degradation of p-cresol. Meanwhile, the removal efficiency of ammonia nitrogen was approximately 60% and was not affected by variations in phenol concentration. Furthermore, the cometabolism of phenol and p-cresol was enhanced by improvement of phenol hydroxylase activity of Chlorella vulgaris after the addition of NaHCO3 as an exogenous nutrient. Therefore, Chlorella vulgaris has a great potential for the biochemical treatment of coal gasification wastewater.
Collapse
Affiliation(s)
- Meng Xiao
- State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Honglei Ma
- State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Meng Sun
- State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Xiangyang Yin
- State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Qingmin Feng
- State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Hongbing Song
- State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Hengjun Gai
- State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
| |
Collapse
|
25
|
Sun ZZ, Liu ZH, Han L, Qin DL, Yang G, Xing WH. Study on the treatment of simulated azo dye wastewater by a novel micro-electrolysis filler. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 79:2279-2288. [PMID: 31411582 DOI: 10.2166/wst.2019.234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A new type of iron-copper-carbon (Fe-Cu-C) ternary micro-electrolysis filler was prepared with a certain proportion of iron powder, activated carbon, bentonite, copper powder, etc. The effect of the new type of micro-electrolysis filler on the simulated methyl orange dye wastewater was studied. The effects of various operational parameters, such as reaction time, initial pH value, aeration rate, filler dose and reaction temperature, on the degradation rate of methyl orange were studied to determine the optimum treatment conditions, and the micro-electrolysis filler was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The experimental results show that the degradation rate of 220 mL of simulated dye wastewater with a concentration of 100 mg/L reached 93.41% ± 2.94% after 60 mL/min of aeration, with an initial pH = 2, a dose of 45 g and 125 minutes of reaction at room temperature. The new micro-electrolysis filler has a high degradation rate for methyl orange solution, which is attributed to the iron and activated carbon particles sintered into an integrated structure, which makes the iron and carbon difficult to separate and affects the galvanic cell reaction. The addition of copper also greatly increases the transmission efficiency of electrons, which promotes the reaction. In addition, the surface iron is consumed, the adjacent carbon is stripped layer by layer, and the new micro-electrolytic filler does not easily passivate and agglomerate during its use.
Collapse
Affiliation(s)
- Zhen-Zhu Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| | - Zhong-Hai Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| | - Le Han
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| | - Dong-Ling Qin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| | - Gang Yang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| | - Wei-Hong Xing
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China E-mail:
| |
Collapse
|
26
|
Zheng M, Han Y, Han H, Xu C, Zhang Z, Ma W. Synergistic degradation on phenolic compounds of coal pyrolysis wastewater (CPW) by lignite activated coke-active sludge (LAC-AS) process: Insights into succession of microbial community under selective pressure. BIORESOURCE TECHNOLOGY 2019; 281:126-134. [PMID: 30818263 DOI: 10.1016/j.biortech.2019.02.074] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 02/12/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
This study illustrated synergistic degradation of phenolic compounds by LAC-AS process via the insight into succession of microbial community under selective pressure. The results demonstrated that high phenols exhibited toxicity pressure to single AS process by eliminating non-tolerate bacteria, inducing vicious circulation by intermediates (catechol, nitrate, etc.) accumulation. However, LAC exerted another selective pressure and facilitated positive bio-community succession of moving biological bed reactor (MBBR). Firstly, it created rich microenvironments for diverse bacteria and promoted resilient adsorption for phenols with the assistance of biodegradation. Secondly, LAC enriched facultative bacteria, which developed multiple degradation paths on phenols and nitrogen based on multifunctional genes, counteracting the toxicity pressure. Specifically, phenols were degraded by the combination of anaerobic hydrolysis and oxidation, while conventional and shortcut nitrification-denitrification (SND) and nitrogen fixation all participated in nitrogen removal, achieving high removal of COD (93.49%), Tph (93.74%), TN (92.20%) and NH4+-N (93.20%) under the highest phenols.
Collapse
Affiliation(s)
- Mengqi Zheng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yuxing Han
- School of Engineering, South China Agriculture University, Guangzhou 510642, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chunyan Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Zhengwen Zhang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wencheng Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| |
Collapse
|