1
|
Liu Q, Wang Y, Sun S, Tang F, Chen H, Chen S, Zhao C, Li L. A novel chitosan-biochar immobilized microorganism strategy to enhance bioremediation of crude oil in soil. CHEMOSPHERE 2023; 313:137367. [PMID: 36427578 DOI: 10.1016/j.chemosphere.2022.137367] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 06/16/2023]
Abstract
The chitosan-biochar composite is a clean and environmentally friendly immobilized microorganisms carrier. In this study, the chitosan-biochar composite as a carrier to immobilize a compound microbial agent contained Pseudomonas aeruginosa and Bacillus licheniformis, and investigated its role in the remediation of oil-contaminated soil. When using 1% (v/v) acetic acid, 3% (m/v) chitosan solution, 0.1% biochar, 4% (v/v) NaOH solution, freeze-drying 6 h, the optimal chitosan-biochar composite material could be obtained. The specific surfacearea of the material increased to 1.725 m2/g and the average pore size also increased from 130.2260 nm to 165.2980 nm after the addition of biochar through the analysis of specific surface area and pore size, which enlarged the contact area of microorganisms and crude oil with the material. SEM showed that the bacterial successfully adhered to the surface and internal of the material. Using FTIR, the results showed that the synthesis of composite carrier material was the covalent combination of -NH2 on chitosan and -COOH on biochar, forming a new chemical bond -NH-CO-. After 60 days of remediation of oil-contaminated soil, the removal rate of crude oil by chitosan-biochar composite immobilized microorganism method was 45.82%, which was 21.26% higher than that of natural remediation. Simultaneously, several oil-degrading bacteria increased at genus level, including Nocardioides (26.79%-33.09%), Bacillus (3.01%-4.10%), Dietzia (1.84%-5.56%), Pseudomonas (0-0.78%), among which Pseudomonas belongs to exogenous bacteria. The results indicated that the chitosan-biochar composite material has high application value in removing crude oil, and further provides a new strategy for bioremediation of oil-contaminated soil.
Collapse
Affiliation(s)
- Qiyou Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao, 266580, China.
| | - Yaru Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao, 266580, China
| | - Shuo Sun
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao, 266580, China
| | - Fang Tang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao, 266580, China
| | - Hongxu Chen
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao, 266580, China
| | - Shuiquan Chen
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| | - Chaocheng Zhao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao, 266580, China
| | - Lin Li
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| |
Collapse
|
2
|
Huang Q, Alengebawy A, Zhu X, Raza AF, Chen L, Chen W, Guo J, Ai P, Li D. Performance of Paracoccus pantotrophus MA3 in heterotrophic nitrification-anaerobic denitrification using formic acid as a carbon source. Bioprocess Biosyst Eng 2022; 45:1661-1672. [PMID: 35984504 DOI: 10.1007/s00449-022-02771-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 08/05/2022] [Indexed: 11/26/2022]
Abstract
Excess amount of nitrogen in wastewater has caused serious concerns, such as water eutrophication. Paracoccus pantotrophus MA3, a novel isolated strain of heterotrophic nitrification-anaerobic denitrification bacteria, was evaluated for nitrogen removal using formic acid as the sole carbon source. The results showed that the maximum ammonium removal efficiency was observed under the optimum conditions of 26.25 carbon to nitrogen ratio, 3.39% (v/v) inoculation amount, 34.64 °C temperature, and at 180 rpm shaking speed, respectively. In addition, quantitative real-time PCR technique analysis assured that the gene expression level of formate dehydrogenase, formate tetrahydrofolate ligase, 5,10-methylenetetrahydrofolate dehydrogenase, serine hydroxymethyltransferase, respiratory nitrate reductase beta subunit, L-glutamine synthetase, glutamate dehydrogenase, and glutamate synthase were up-regulated compared to the control group, and combined with nitrogen mass balance analysis to conclude that most of the ammonium was removed by assimilation. A small amount of nitrate and nearly no nitrite were accumulated during heterotrophic nitrification. MA3 exhibited significant denitrification potential under anaerobic conditions with a maximum nitrate removal rate of 4.39 mg/L/h, and the only gas produced was N2. Additionally, 11.50 ± 0.06 mg/L/h of NH4+-N removal rate from biogas slurry was achieved.
Collapse
Affiliation(s)
- Qun Huang
- College of Engineering, Huazhong Agricultural University, Wuhan, 430070, China
- Tianjin Key Laboratory for Industrial Biological, Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, No. 32, West Seven Road, Airport Economic District, Tianjin, China
- National Innovation Centre for Synthetic Biology, Tianjin, China
| | - Ahmed Alengebawy
- College of Engineering, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiangyu Zhu
- Tianjin Key Laboratory for Industrial Biological, Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, No. 32, West Seven Road, Airport Economic District, Tianjin, China
- National Innovation Centre for Synthetic Biology, Tianjin, China
| | - Amin Farrukh Raza
- Tianjin Key Laboratory for Industrial Biological, Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, No. 32, West Seven Road, Airport Economic District, Tianjin, China
- National Innovation Centre for Synthetic Biology, Tianjin, China
| | - Limei Chen
- Tianjin Key Laboratory for Industrial Biological, Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, No. 32, West Seven Road, Airport Economic District, Tianjin, China
- National Innovation Centre for Synthetic Biology, Tianjin, China
| | - Wuxi Chen
- Tianjin Key Laboratory for Industrial Biological, Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, No. 32, West Seven Road, Airport Economic District, Tianjin, China
- National Innovation Centre for Synthetic Biology, Tianjin, China
| | - Jiahao Guo
- College of Engineering, Huazhong Agricultural University, Wuhan, 430070, China
| | - Ping Ai
- College of Engineering, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Demao Li
- Tianjin Key Laboratory for Industrial Biological, Systems and Bioprocessing Engineering, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, No. 32, West Seven Road, Airport Economic District, Tianjin, China.
- National Innovation Centre for Synthetic Biology, Tianjin, China.
| |
Collapse
|
3
|
Guo J, Chen C, Chen W, Jiang J, Chen B, Zheng F. Effective immobilization of Bacillus subtilis in chitosan-sodium alginate composite carrier for ammonia removal from anaerobically digested swine wastewater. CHEMOSPHERE 2021; 284:131266. [PMID: 34175512 DOI: 10.1016/j.chemosphere.2021.131266] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 05/06/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
To overcome the easy loss of microorganism, the mass production of sludge and the consumption of aeration energy during biological treatment of anaerobically digested swine wastewater, this study used chitosan-sodium alginate composite carrier to prepare immobilized bacteria pellets. The heterotrophic bacteria tolerant to high concentrations of ammonia nitrogen were isolated and the conditions for immobilizing bacteria were optimized. The performance of immobilized bacteria pellets to remove ammonia nitrogen from ADSW was determined and the corresponding mechanism was investigated. Results showed that the isolated bacteria were Bacillus subtilis, and the optimal conditions to prepare the immobilized bacteria pellets by response surface methodology tests were sodium alginate of 0.84% (m/V), chitosan of 0.22% (m/V), embedding time of 32 min and embedding amount of 15% (V/V). In ADSW treatment, at pH 6, 20 g/L of the immobilized bacteria pellets removed 96.5% of ammonia nitrogen. Both adsorption and microbial action contributed to ammonia nitrogen removal, and their contributions were 54.3% and 42.2%, respectively. Compared with the immobilized bacteria pellets using chitosan-sodium alginate as carrier, the one using mono alginate as carrier had a weaker ability to remove ammonia nitrogen, with a removal efficiency of 67.4%. The main mechanism was the formation of polyelectrolyte membrane by the connection between amino groups of chitosan and carboxyl groups of sodium alginate, which stabilized the immobilized bacteria pellets and prolonged their service life. To sum up, the immobilized bacteria pellets using chitosan-sodium alginate as an embedding agent have a promising prospect in ammonia nitrogen removal from wastewater.
Collapse
Affiliation(s)
- Junyuan Guo
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan, 610225, China.
| | - Cheng Chen
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan, 610225, China
| | - Wenjing Chen
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan, 610225, China
| | - Jianying Jiang
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan, 610225, China
| | - Bozhi Chen
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan, 610225, China
| | - Fei Zheng
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan, 610225, China
| |
Collapse
|
4
|
Liu Y, Li Y, Yuan X, Ren R, Lv Y. A self-prepared graphene oxide/sodium alginate aerogel as biological carrier to improve the performance of a heterotrophic nitrifier. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
5
|
Hu X, Su J, Ali A, Wang Z, Wu Z. Heterotrophic nitrification and biomineralization potential of Pseudomonas sp. HXF1 for the simultaneous removal of ammonia nitrogen and fluoride from groundwater. BIORESOURCE TECHNOLOGY 2021; 323:124608. [PMID: 33421833 DOI: 10.1016/j.biortech.2020.124608] [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: 11/13/2020] [Revised: 12/18/2020] [Accepted: 12/19/2020] [Indexed: 06/12/2023]
Abstract
Pseudomonas sp. HXF1, a strain capable of heterotrophic nitrification, aerobic denitrification (HNAD), and biomineralization was identified and employed for the simultaneous removal of ammonia nitrogen (NH4+-N) and fluoride (F-). It removed 99.2% of NH4+-N without accumulation of nitrous nitrogen (NO2--N) and nitrate nitrogen (NO3--N), while removed 87.3% of F-. Response surface methodology (RSM) was used to study the best removal conditions for NH4+-N and F-. The results of nitrogen balance experiments with NH4Cl, NaNO2, and NaNO3 as single nitrogen sources and amplification experiments of denitrification genes proved that the bacterial strains may remove NH4+-N through HNAD. The experimental results of Scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffractometer (XRD) indicated that the way of F- removal may be adsorption and co-precipitation. The results demonstrated that the strain HXF1 has great potential in the biological denitrification and F- removal of groundwater.
Collapse
Affiliation(s)
- Xiaofen Hu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Junfeng Su
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Amjad Ali
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Zhao Wang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Zizhen Wu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| |
Collapse
|
6
|
Xiao L, Zhao Z, Ma Z, Chen J, Song Z. Immobilization of Rhodopseudomonas palustris P1 on glass pumice to improve the removal of NH 4 + -N and NO 2 - -N from aquaculture pond water. Biotechnol Appl Biochem 2019; 67:323-329. [PMID: 31758817 DOI: 10.1002/bab.1863] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 11/15/2019] [Indexed: 12/21/2022]
Abstract
We conducted this research in order to investigate the potential of a new material called glass pumice for use as a microorganism immobilization carrier to improve aquaculture pond water quality. The pH adjustment capacity and the Rhodopseudomonas palustris P1 cell adsorption capacity of glass pumice were measured. The immobilized Rps. palustris P1 and the free sample were compared to determine which had an enhanced NH4 + -N and NO2 - -N removal efficiency. The results showed that glass pumice significantly affected the pH of the acid solution (P < 0.05); the pH increased from 3.0 ± 0.08 to 7.21 ± 0.13 in 12 H. Rps. palustris P1 adsorption to glass pumice was rapid and reached equilibrium within 60 Min. The Langmuir adsorption parameter data showed that glass pumice had a higher affinity for Rps. palustris P1 than SiO2 powder, with an adsorption capacity of 4.02 × 108 cells g-1 . The maximum NH4 + -N and NO2 - -N removal rates by immobilized Rps. palustris P1 were 134.82 ± 0.67% and 93.68 ± 0.14% higher than those of nonimmobilized P1, respectively. Based on the above results, we propose that glass pumice is potential as a microorganism carrier material in aquaculture water treatment.
Collapse
Affiliation(s)
- Ling Xiao
- National Pathogen Collection for Aquatic Animals, Shanghai Ocean University, Shanghai, People's Republic of China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, People's Republic of China.,Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, People's Republic of China
| | - Zhen Zhao
- National Pathogen Collection for Aquatic Animals, Shanghai Ocean University, Shanghai, People's Republic of China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, People's Republic of China.,Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, People's Republic of China
| | - Zhuojun Ma
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, People's Republic of China.,Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, People's Republic of China
| | - JunLv Chen
- Jiangsu Jingruite Environmental Protection Co., Ltd, Wuxi, Jiangsu, People's Republic of China
| | - ZengFu Song
- National Pathogen Collection for Aquatic Animals, Shanghai Ocean University, Shanghai, People's Republic of China.,National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, People's Republic of China.,Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, People's Republic of China
| |
Collapse
|
7
|
Cheng C, Hu Y, Shao S, Yu J, Zhou W, Cheng J, Chen Y, Chen S, Chen J, Zhang L. Simultaneous Cr(VI) reduction and electricity generation in Plant-Sediment Microbial Fuel Cells (P-SMFCs): Synthesis of non-bonding Co 3O 4 nanowires onto cathodes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 247:647-657. [PMID: 30711820 DOI: 10.1016/j.envpol.2019.01.084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/18/2019] [Accepted: 01/19/2019] [Indexed: 06/09/2023]
Abstract
Development of low-cost cathode materials for Plant-Sediment Microbial Fuel Cells (P-SMFCs) has gained increasing interest, due to improved performance levels in terms of power and pollutant removal. A novel low cost three-dimensional cathode prepared by simple three-step strategy with growth of Co3O4 in-situ biofilm was successfully prepared. Different cathodes were applied to the six parallel P-SMFCs systems (reactor: R1-R6), such as graphite felt (GF), Pt/C, GF@Co3O4 (non-bonding Co3O4 nanowires on GF), GF@SG-Co3O4 (using argon as shielding gas (SG)). Its performances (R1, R2: control groups) were evaluated by electricity generation and Cr(VI) reduction at initial cadmium concentrations (4.97, 10.29 and 21.16 mg L-1). A significant Cr(VI) removal efficiency of 99.76%, maximum power density of 75.12 ± 2.90 mW m-2 and Cr(VI) adsorption capacity of 1.67 mg g-1 were obtained at initial Cr(VI) concentration of 21.16 mg L-1 with non-bonding GF@Co3O4 and bio-GF@SG-Co3O4 as cathodes. This indicated that these two materials were better than others (GF, Pt/C and GF@Co3O4) as cathodes. Characterization analysis including scanning electron microscope (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Polarization curve, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) showed that high current generation Cr(VI) removal mainly attributed to transportation of plants, adsorption of bio-cathode, formation of a relatively high concentration region and abundant oxygen vacancies of GF@SG-Co3O4. The results show that P-SMFCs with GF@SG-Co3O4 cathode may be a potentially novel approach for remediating Cr(VI) contaminated waster or soil.
Collapse
Affiliation(s)
- Ce Cheng
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Yongyou Hu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China.
| | - Sicheng Shao
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China.
| | - Jiayuan Yu
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Weijia Zhou
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Jianhua Cheng
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Yuancai Chen
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Shengnan Chen
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Junfeng Chen
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| | - Lihua Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China
| |
Collapse
|
8
|
Shen Y, Gao J, Li L. Municipal wastewater treatment via co-immobilized microalgal-bacterial symbiosis: Microorganism growth and nutrients removal. BIORESOURCE TECHNOLOGY 2017; 243:905-913. [PMID: 28738545 DOI: 10.1016/j.biortech.2017.07.041] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 07/01/2017] [Accepted: 07/06/2017] [Indexed: 05/20/2023]
Abstract
A symbiotic microalgal-bacterial system may be an optional technology for wastewater treatment. In this study, co-immobilized of a bacterium isolated from a municipal wastewater treatment plant (Pseudomonas putida) and a microalgae Chlorella vulgaris was used in the study of cell growth and nutrient removal during wastewater treatment under batch and continuous culture conditions. Under batch culture conditions, co-immobilization treatment significantly increased the cell density of C. vulgaris and P. putida compared with other treatments. The co-immobilized treatment also showed higher removal of ammonium, phosphate and COD than any single treatment, indicating that the nutrient uptake capability of C. vulgaris and P. Putida was mutually enhanced mutually. When tested in continuous mode, the treatment with a hydraulic retention time of 24h at the organic load rate of 1159.2mgCODL-1d-1 was most appropriate for wastewater treatment.
Collapse
Affiliation(s)
- Yu Shen
- Research Institute of Environmental Sciences, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Jingqing Gao
- School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China.
| | - Linshuai Li
- Zhengzhou University Multi-Functional Design and Research Academy Co, Zhengzhou 450001, China
| |
Collapse
|