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Naik R, Gupte S. Optimization of media components for enhanced carotenoid production by Paracoccus marcusii RSPO1 and assessment of their cytotoxicity against A549 and vero cells. Prep Biochem Biotechnol 2024; 54:764-778. [PMID: 38165781 DOI: 10.1080/10826068.2023.2282533] [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] [Indexed: 01/04/2024]
Abstract
In this study, we tried to explore the influence of various tricarboxylic acid (TCA) cycle intermediates on carotenoid production and with a focus on enhancing pigment biosynthesis, we conducted two statistical analysis. In case of TCA intermediates influence on pigment production by Paracoccus marcusii RSPO1; fumaric acid, and malic acid were observed as potent enhancers of pigment biosynthesis. Further, to optimize key media components for enhanced carotenoid production, the Plackett-Burman design was employed encompassing carbon, nitrogen sources, TCA cycle intermediates, and metal salts. The selected factors after Plackett Burman were fine-tuned through Response Surface Methodology and the optimal concentrations that have remarkably elevated carotenoid production were starch-2.24 g/l, MgSO4-0.416 g/l, ZnSO4-0.0157 g/l, and fumaric Acid-16 mM. Further, evaluation of pigment cytotoxicity against normal (Vero) and Non-Small Cell Carcinoma (A549) cells was performed. The resultant IC50 values were quantified as 161.3 µg/ml and 7.623 µg/ml for Vero and A549 cells, respectively. Moreover, a reactive oxygen species (ROS) determination study in A549 cells was done which have shown a noteworthy threefold ROS production in A549 cells through fluorescence spectroscopic observation. This implies that the bacterial carotenoids can act as potent pro-oxidants against cancerous cells while being nontoxic toward normal cells.
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Affiliation(s)
- Raj Naik
- Department of Microbiology, Ashok and Rita Patel Institute of Integrated Study and Research in Biotechnology and Allied Science (ARIBAS), CVM University, Anand, Gujarat, India
| | - Shilpa Gupte
- Department of Microbiology, Ashok and Rita Patel Institute of Integrated Study and Research in Biotechnology and Allied Science (ARIBAS), CVM University, Anand, Gujarat, India
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2
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Torpee S, Kantachote D, Sukhoom A, Tantirungkij M. Culture optimization to enhance carotenoid production of a selected purple nonsulfur bacterium and its activity against acute hepatopancreatic necrosis disease-causing Vibrio parahaemolyticus. Biotechnol Appl Biochem 2022; 69:2422-2436. [PMID: 34841569 DOI: 10.1002/bab.2292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 11/23/2021] [Indexed: 12/27/2022]
Abstract
Purple nonsulfur bacteria (PNSB) were investigated for their carotenoid production and anti-vibrio activity against acute hepatopancreatic necrosis disease (AHPND)-causing Vibrio parahaemolyticus. To test carotenoid production, selected strains were cultivated in basic isolation medium (BIM), glutamate acetate medium, G5 medium and artificial acetic acid wastewater (AAW) medium. From 144 PNSB, Rhodopseudomonas palustris KTSSG46 was selected to produce carotenoids under microaerobic light conditions in BIM. When the culture medium was optimized, strain KTSSG46 grown in BIM modified with l-glutamate at 1 g/L more effectively inhibited AHPND-causing V. parahaemolyticus strains than standard BIM with 1 g/L (NH4 )2 SO4 . BIM was further modified with 1.23 g/L MgSO4 ·7H2 O and carotenoid production increased 40.22%. Carotenoid production at day 2 by strain KTSSG46 grown in BIM modified with l-glutamate at 1 and 1.23 g/L MgSO4 ·7H2 O was the same as production in BIM modified with monosodium glutamate (MSG). Culture supernatants from all BIM formulations showed similar activity against the resistant AHPND strain SR2. Based on high-performance liquid chromatography, carotenoids of strain KTSSG46 might be canthaxanthin. Grown in BIM modified with MSG, strain KTSSG46 could produce inexpensive carotenoids and release anti-vibrio compounds that, applied as shrimp feed additive, would prevent AHPND strains.
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Affiliation(s)
- Salwa Torpee
- Department of Microbiology, Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Thailand
| | - Duangporn Kantachote
- Department of Microbiology, Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Thailand
| | - Ampaitip Sukhoom
- Department of Microbiology, Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Thailand
| | - Manee Tantirungkij
- Research and Academic Service Center, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand
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3
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Liu S, Li H, Daigger GT, Huang J, Song G. Material biosynthesis, mechanism regulation and resource recycling of biomass and high-value substances from wastewater treatment by photosynthetic bacteria: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 820:153200. [PMID: 35063511 DOI: 10.1016/j.scitotenv.2022.153200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
The environmental-friendly and economic benefits generated from photosynthetic bacteria (PSB) wastewater treatment have attracted significant attention. This process of resource recovery can produce PSB biomass and high-value substances including single cell protein, Coenzyme Q10, polyhydroxyalkanoates (PHA), 5-aminolevulinic acid, carotenoids, bacteriocin, and polyhydroxy chain alkyl esters, etc. for application in various fields, such as agriculture, medical treatment, chemical, animal husbandry and food industry while treating wastewaters. The main contents of this review are summarized as follows: physiological characteristics, mechanism and application of PSB and potential of single cell protein (SCP) production are described; PSB wastewater treatment technology, including procedures and characteristics, typical cases, influencing factors and bioresource recovery by membrane bioreactor are detailed systematically. The future development of PSB-based resource recovery and wastewater treatment are also provided, particularly concerning PSB-membrane reactor (MBR) process, regulation of biosynthesis mechanism of high-value substances and downstream separation and purification technology. This will provide a promising and new alternative for wastewater treatment recycling.
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Affiliation(s)
- Shuli Liu
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450000, China; Zhongzhou Water Holding Co., Ltd., Zhengzhou 450046, China; Civil and Environmental Engineering, University of Michigan, 2350 Hayward St, G.G. Brown Building, Ann Arbor, MI 48109, USA.
| | - Heng Li
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450000, China
| | - Glen T Daigger
- Civil and Environmental Engineering, University of Michigan, 2350 Hayward St, G.G. Brown Building, Ann Arbor, MI 48109, USA
| | - Jianping Huang
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450000, China.
| | - Gangfu Song
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450000, China; Zhongzhou Water Holding Co., Ltd., Zhengzhou 450046, China
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Lu H, Zhang G, He S, Zhao R, Zhu D. Purple non-sulfur bacteria technology: a promising and potential approach for wastewater treatment and bioresources recovery. World J Microbiol Biotechnol 2021; 37:161. [PMID: 34436687 DOI: 10.1007/s11274-021-03133-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 08/18/2021] [Indexed: 11/24/2022]
Abstract
Shortage of water, energy, and bioresources in the world has led to the exploration of new technologies that achieve resource recovery from wastewater, which has become a new sustainable trend. Photosynthetic non-sulfur bacteria (PNSB), the most ancient photo microorganism, not only treats different wastewater types, but also generates PNSB cells, which are non-toxic bioresources and containing many value-added products. These bioresources can be used as raw materials in the agricultural, food, and medical industries. Therefore, PNSB or PNSB-based wastewater resource recovery technology can be simultaneously used to treat wastewater and produce useful bioresources. Compared with traditional wastewater treatment, this technology can reduce CO2 emissions, promote the N recovery ratio and prevent residual sludge disposal or generation. After being developed for over half a century, PNSB wastewater resource recovery technology is currently extended towards industrial applications. Here, this technology is comprehensively introduced in terms of (1) PNSB characteristics and metabolism; (2) PNSB wastewater treatment and bioresource recovery efficiency; (3) the relative factors influencing the performance of this technology, including light, oxygen, strains, wastewater types, hydraulic retention time, on wastewater treatment, and resource production; (4) PNSB value-added bioresources and their generation from wastewater; (5) the scale-up history of PNSB technology; (6) Finally, the future perspectives and challenges of this technology were also analysed and summarised.
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Affiliation(s)
- Haifeng Lu
- College of Water Resource and Civil Engineering, China Agriculture University, Beijing, 100083, China.,Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing, 100083, China
| | - Guangming Zhang
- Key Laboratory of Environmental Biotechnology, China Academy of Science, Shuangqing Road, Beijing, 100084, China. .,School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China.
| | - Shichao He
- College of Water Resource and Civil Engineering, China Agriculture University, Beijing, 100083, China.,Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing, 100083, China
| | - Ruihan Zhao
- College of Water Resource and Civil Engineering, China Agriculture University, Beijing, 100083, China.,Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing, 100083, China
| | - Da Zhu
- Nan Tong Ju Yi Cheng Guang Biotechnology Co. LTD., Nantong, 226321, China
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Wu X, Ma G, Liu C, Qiu XY, Min L, Kuang J, Zhu L. Biosynthesis of pinene in purple non-sulfur photosynthetic bacteria. Microb Cell Fact 2021; 20:101. [PMID: 34001115 PMCID: PMC8130110 DOI: 10.1186/s12934-021-01591-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 05/06/2021] [Indexed: 12/13/2022] Open
Abstract
Background Pinene is a monoterpene, that is used in the manufacture of fragrances, insecticide, fine chemicals, and renewable fuels. Production of pinene by metabolic-engineered microorganisms is a sustainable method. Purple non-sulfur photosynthetic bacteria belong to photosynthetic chassis that are widely used to synthesize natural chemicals. To date, researches on the synthesis of pinene by purple non-sulfur photosynthetic bacteria has not been reported, leaving the potential of purple non-sulfur photosynthetic bacteria synthesizing pinene unexplored. Results Rhodobacter sphaeroides strain was applied as a model and engineered to express the fusion protein of heterologous geranyl diphosphate synthase (GPPS) and pinene synthase (PS), hence achieving pinene production. The reaction condition of pinene production was optimized and 97.51 μg/L of pinene was yielded. Then, genes of 1-deoxy-d-xylulose 5-phosphate synthase, 1-deoxy-d-xylulose 5-phosphate reductoisomerase and isopentenyl diphosphate isomerase were overexpressed, and the ribosome binding site of GPPS-PS mRNA was optimized, improving pinene titer to 539.84 μg/L. Conclusions In this paper, through heterologous expression of GPPS-PS, pinene was successfully produced in R. sphaeroides, and pinene production was greatly improved by optimizing the expression of key enzymes. This is the first report on pinene produce by purple non-sulfur photosynthetic bacteria, which expands the availability of photosynthetic chassis for pinene production. ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12934-021-01591-6.
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Affiliation(s)
- Xiaomin Wu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, 410073, Hunan, China.
| | - Guang Ma
- China Astronaut Research and Training Center, Beijing, 100094, China
| | - Chuanyang Liu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, 410073, Hunan, China
| | - Xin-Yuan Qiu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, 410073, Hunan, China
| | - Lu Min
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, 410073, Hunan, China
| | - Jingyu Kuang
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, 410073, Hunan, China
| | - Lingyun Zhu
- Department of Biology and Chemistry, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha, 410073, Hunan, China.
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6
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George DM, Vincent AS, Mackey HR. An overview of anoxygenic phototrophic bacteria and their applications in environmental biotechnology for sustainable Resource recovery. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2020; 28:e00563. [PMID: 33304839 PMCID: PMC7714679 DOI: 10.1016/j.btre.2020.e00563] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/12/2020] [Accepted: 11/18/2020] [Indexed: 12/14/2022]
Abstract
Anoxygenic phototrophic bacteria (APB) are a phylogenetically diverse group of organisms that can harness solar energy for their growth and metabolism. These bacteria vary broadly in terms of their metabolism as well as the composition of their photosynthetic apparatus. Unlike oxygenic phototrophic bacteria such as algae and cyanobacteria, APB can use both organic and inorganic electron donors for light-dependent fixation of carbon dioxide without generating oxygen. Their versatile metabolism, ability to adapt in extreme conditions, low maintenance cost and high biomass yield make APB ideal for wastewater treatment, resource recovery and in the production of high value substances. This review highlights the advantages of APB over algae and cyanobacteria, and their applications in photo-bioelectrochemical systems, production of poly-β-hydroxyalkanoates, single-cell protein, biofertilizers and pigments. The ecology of ABP, their distinguishing factors, various physiochemical parameters governing the production of high-value substances and future directions of APB utilization are also discussed.
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Key Words
- ALA, 5-Aminolevulinic acid
- APB, Anoxygenic phototrophic bacteria
- Anoxygenic phototrophic bacteria (APB)
- BChl, Bacteriochlorophyll
- BES, Bioelectrochemical systems
- BPV, Biophotovoltaic
- BPh, Bacteriopheophytin
- Bacteriochlorophyll (BChl)
- Chl, Chlorophyll
- CoQ10, Coenzyme Q10
- DET, Direct electron transfer
- DNA, Deoxyribonucleic acid
- DO, Dissolved oxygen
- DXP, 1 deoxy-d-xylulose 5-phosphate
- FPP, Farnesyl pyrophosphate
- Fe-S, Iron-Sulfur
- GNSB, Green non sulfur bacteria
- GSB, Green sulfur bacteria
- IPP, Isopentenyl pyrophosphate isomerase
- LED, light emitting diode
- LH2, light-harvesting component II
- MFC, Microbial fuel cell
- MVA, Mevalonate
- PH3B, Poly-3-hydroxybutyrate
- PHA, Poly-β-hydroxyalkanoates
- PHB, Poly-β-hydroxybutyrate
- PNSB, Purple non sulfur bacteria
- PPB, Purple phototrophic bacteria
- PSB, Purple sulfur bacteria
- Pheo-Q, Pheophytin-Quinone
- Photo-BES, Photosynthetic bioelectrochemical systems
- Photo-MFC, Photo microbial fuel cell
- Poly-β-hydroxyalkanoates (PHA)
- Purple phototrophic bacteria (PPB)
- Resource recovery
- RuBisCO, Ribulose-1,5-biphosphate carboxylase/oxygenase
- SCP, Single-cell protein
- SOB, Sulfide oxidizing bacteria
- SRB, Sulfate reducing bacteria
- Single-cell proteins (SCP)
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Affiliation(s)
- Drishya M. George
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Annette S. Vincent
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
- Biological Sciences Program, Carnegie Mellon University in Qatar, Qatar
| | - Hamish R. Mackey
- College of Health and Life Sciences, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
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Cao K, Zhi R, Zhang G. Photosynthetic bacteria wastewater treatment with the production of value-added products: A review. BIORESOURCE TECHNOLOGY 2020; 299:122648. [PMID: 31889604 DOI: 10.1016/j.biortech.2019.122648] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/15/2019] [Accepted: 12/17/2019] [Indexed: 06/10/2023]
Abstract
Wastewater resource recovery can generate environmental and economic benefits; especially, value-added substance recovery from wastewater can create profits. Photosynthetic bacteria (PSB) can produce protein, coenzyme Q10, 5-ALA, carotenoids, bacteriochlorin, and polyhydroxyalkanoates while treating wastewaters. This review consists of four parts: (1) PSB wastewater treatment, including influence factors and enhancement methods for value-added substances production; (2) downstream processing, including cell separation from effluent, extraction of value-added substances, and purification; (3) comparison among different wastewater resource recovery technologies and brief economic analysis; (4) future development. The focus of this review is the whole procedure of PSB value-added substance production from wastewater. Recent progress of theoretical researches, practical researches and economic issues were systematically summarized and critically analyzed with the scope of promoting PSB technology from concept to practice.
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Affiliation(s)
- Kefan Cao
- School of Environment and Natural Resources, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China
| | - Ran Zhi
- School of Environment and Natural Resources, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Beichen District, Tianjin 300130, China.
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8
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Liu S, Daigger GT, Kang J, Zhang G. Effects of light intensity and photoperiod on pigments production and corresponding key gene expression of Rhodopseudomonas palustris in a photobioreactor system. BIORESOURCE TECHNOLOGY 2019; 294:122172. [PMID: 31606599 DOI: 10.1016/j.biortech.2019.122172] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/17/2019] [Accepted: 09/18/2019] [Indexed: 06/10/2023]
Abstract
Light intensity and photoperiod significantly affect Rhodopseudomonas palustris growth and pigments production and their optimization is necessary for pigment biosynthesis. In this study, the impacts of different light intensity and light/dark cycles were investigated on biomass, carotenoids, bacteriochlorophyll production, together with pollutant removal, in a photobioreactor system. Results showed that R. palustris had the highest carotenoids and bacteriochlorophyll productions with light intensity of 150 μmol-photons/m2/s and light/dark cycle of 4/2 (16 h/8h). The corresponding values were 1.94 mg/g-biomass and 1.17 mg/g-biomass, respectively. The effects of light/dark cycle on crtA and bchE gene expression in pigments biosynthesis were also studied. Mechanism analysis revealed that carotenoids and bacteriochlorophyll yields represented good synergistic effect, which was consistent with the up-regulation of crtA and bchE gene expressions under optimal light/dark cycle of 4/2.
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Affiliation(s)
- Shuli Liu
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450000, China; Henan Key Laboratory of Water Environment Simulation and Treatment, Zhengzhou 450046, China; Henan Engineering Research Center of Water Pollution and Soil Damage Remediation, Zhengzhou 450046, China.
| | - Glen T Daigger
- Civil and Environmental Engineering, University of Michigan, 2350 Hayward St, G.G. Brown Building, Ann Arbor, MI 48109, USA.
| | - Jia Kang
- School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450000, China; Henan Key Laboratory of Water Environment Simulation and Treatment, Zhengzhou 450046, China; Henan Engineering Research Center of Water Pollution and Soil Damage Remediation, Zhengzhou 450046, China
| | - Guangming Zhang
- School of Environment & Natural Resource, Renmin University of China, Beijing 100872, China.
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Lu H, Zhang G, Zheng Z, Meng F, Du T, He S. Bio-conversion of photosynthetic bacteria from non-toxic wastewater to realize wastewater treatment and bioresource recovery: A review. BIORESOURCE TECHNOLOGY 2019; 278:383-399. [PMID: 30683503 DOI: 10.1016/j.biortech.2019.01.070] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 01/12/2019] [Accepted: 01/18/2019] [Indexed: 06/09/2023]
Abstract
Generating or recycling water and resources from wastewater other than just treating wastewater is one of the most popular trends worldwide. Photosynthetic bacteria (PSB) wastewater treatment and resource recovery technology is one of the most potential methods. PSBs are non-toxic and contain lots of value-added products that can be utilized in the agricultural and food industries. They are effective to degrade pollutants and synthesize useful biomass, thus realizing wastewater treatment, bioresource production, and eliminating waste sludge. If all the nutrients in wastewaters could be bio-converted by PSB, then pollutant reductions and economic benefits would be achieved. This review paper firstly describes and summarizes this technology, including PSBs classification, metabolism, and the market application. The feasibility, technical procedures, bioreactors, pollutant removal, and bioresource production are also summarized, compared and evaluated. Issues that concern the advantages and industrialization of this technologies at the plant scale are also discussed.
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Affiliation(s)
- Haifeng Lu
- College of Water Resource and Civil Engineering, China Agriculture University, Beijing 100083, China; Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China.
| | - Guangming Zhang
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China.
| | - Ziqiao Zheng
- Yantai Research Institute, China Agriculture University, Yantai 264000, China
| | - Fan Meng
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Taisheng Du
- College of Water Resource and Civil Engineering, China Agriculture University, Beijing 100083, China; Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China
| | - Shichao He
- College of Water Resource and Civil Engineering, China Agriculture University, Beijing 100083, China; Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China
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10
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Lu H, Han T, Zhang G, Ma S, Zhang Y, Li B, Cao W. Natural light-micro aerobic condition for PSB wastewater treatment: a flexible, simple, and effective resource recovery wastewater treatment process. ENVIRONMENTAL TECHNOLOGY 2018; 39:74-82. [PMID: 28278105 DOI: 10.1080/09593330.2017.1296027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 02/11/2017] [Indexed: 06/06/2023]
Abstract
Photosynthetic bacteria (PSB) have two sets of metabolic pathways. They can degrade pollutants through light metabolic under light-anaerobic or oxygen metabolic pathways under dark-aerobic conditions. Both metabolisms function under natural light-microaerobic condition, which demands less energy input. This work investigated the characteristics of PSB wastewater treatment process under that condition. Results showed that PSB had very strong adaptability to chemical oxygen demand (COD) concentration; with F/M of 5.2-248.5 mg-COD/mg-biomass, the biomass increased three times and COD removal reached above 91.5%. PSB had both advantages of oxygen metabolism in COD removal and light metabolism in resource recovery under natural light-microaerobic condition. For pollutants' degradation, COD, total organic carbon, nitrogen, and phosphorus removal reached 96.2%, 91.0%, 70.5%, and 92.7%, respectively. For resource recovery, 74.2% of C in wastewater was transformed into biomass. Especially, coexistence of light and oxygen promote N recovery ratio to 70.9%, higher than with the other two conditions. Further, 93.7% of N-removed was synthesized into biomass. Finally, CO2 emission reduced by 62.6% compared with the traditional process. PSB wastewater treatment under this condition is energy-saving, highly effective, and environment friendly, and can achieve pollution control and resource recovery.
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Affiliation(s)
- Haifeng Lu
- a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China
- b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China
- c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China
| | - Ting Han
- a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China
- b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China
- c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China
| | - Guangming Zhang
- d School of Environment and Natural Resources , Renmin University of China , Beijing , People's Republic of China
| | - Shanshan Ma
- a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China
- b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China
- c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China
| | - Yuanhui Zhang
- e Agricultural Engineering Sciences , University of Illinois at Urbana-Champaign , Urbana , IL , USA
| | - Baoming Li
- a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China
- b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China
- c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China
| | - Wei Cao
- a College of Water Resource and Civil Engineering , China Agriculture University , Beijing , People's Republic of China
- b Key Laboratory of Agricultural Engineering in Structure and Environment , Ministry of Agriculture , Beijing , People's Republic of China
- c Beijing Engineering Research Center on Animal Healthy Environment , Beijing , People's Republic of China
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