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Yang M, Liu Z, Wang A, Nopens I, Hu H, Chen H. High biomass yields of Chlorella protinosa with efficient nitrogen removal from secondary effluent in a membrane photobioreactor. J Environ Sci (China) 2024; 146:272-282. [PMID: 38969455 DOI: 10.1016/j.jes.2023.10.036] [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: 07/16/2023] [Revised: 10/28/2023] [Accepted: 10/29/2023] [Indexed: 07/07/2024]
Abstract
Further treatment of secondary effluents before their discharge into the receiving water bodies could alleviate water eutrophication. In this study, the Chlorella proteinosa was cultured in a membrane photobioreactor to further remove nitrogen from the secondary effluents. The effect of hydraulic retention time (HRT) on microalgae biomass yields and nutrient removal was studied. The results showed that soluble algal products concentration reduced in the suspension at low HRT, thereby alleviating microalgal growth inhibition. In addition, the lower HRT reduced the nitrogen limitation for Chlorella proteinosa's growth through the phase-out of nitrogen-related functional bacteria. As a result, the productivity for Chlorella proteinosa increased from 6.12 mg/L/day at an HRT of 24 hr to 20.18 mg/L/day at an HRT of 8 hr. The highest removal rates of 19.7 mg/L/day, 23.8 mg/L/day, and 105.4 mg/L/day were achieved at an HRT of 8 hr for total nitrogen (TN), ammonia, and chemical oxygen demand (COD), respectively. However, in terms of removal rate, TN and COD were the largest when HRT is 24 hr, which were 74.5% and 82.6% respectively. The maximum removal rate of ammonia nitrogen was 99.2% when HRT was 8 hr.
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Affiliation(s)
- Min Yang
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China; BIOMATH, Department of Data Analysis and Mathematical Modelling, Ghent University, Gent B 9000, Belgium
| | - Zhen Liu
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China
| | - Aijie Wang
- School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Ingmar Nopens
- BIOMATH, Department of Data Analysis and Mathematical Modelling, Ghent University, Gent B 9000, Belgium
| | - Hairong Hu
- School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Hong Chen
- Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China.
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2
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Huang P, Chen Y, Li Z, Zhang B, Yu S, Zhou Y. Ammonia-dependent reducing power redistribution for purple phototrophic bacteria culture-based biohydrogen production. WATER RESEARCH 2024; 256:121599. [PMID: 38615602 DOI: 10.1016/j.watres.2024.121599] [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: 10/23/2023] [Revised: 04/07/2024] [Accepted: 04/09/2024] [Indexed: 04/16/2024]
Abstract
The global energy crisis has intensified the search for sustainable and clean alternatives, with biohydrogen emerging as a promising solution to address environmental challenges. Leveraging photo fermentation (PF) process, purple phototrophic bacteria (PPB) can harness reducing power derived from organic substrates to facilitate hydrogen production. However, existing studies report much lower H2 yields than theoretical value when using acetate as carbon source and ammonia as nitrogen source, primarily attributed to the widely employed pulse-feeding mode which suffers from ammonia inhibition effect on nitrogenase. To address this issue, a continuous feeding mode was applied to avoid ammonia accumulation in this study. On the other hand, other pathways like carbon fixation and polyhydroxyalkanoate (PHA) formation could compete reducing power with H2 production. However, the reducing power allocation under continuous feeding mode is not yet clear. In this study, the reducing power allocation and hydrogen production performance were evaluated under various ammonia loading, using acetate as carbon source and infrared LED at around 50 W·m-2 as light source. The results show that (a) The absence of ammonia resulted in the best performance for hydrogen production, with 44 % of the reducing power distributed to H2 and the highest H2 volumetric productivity, while the allocation of reducing power to hydrogen production stopped when ammonia loading was above 7.6 mg NH4-N·L-1·d-1; (b) when PPB required to eliminate reducing power under ammonia limited conditions, PHA production was the preferred pathway followed by the hydrogen production pathway, but once PHA accumulation reached saturation, hydrogen generation pathway dominated; (c) under ammonia limited conditions, the TCA cycle was more activated rendering higher NADH (i.e. reducing power) production compared with that under ammonia sufficient conditions which was verified by metagenomics analysis, and all the hydrogen production, PHA accumulation and carbon fixation pathways were highly active to dissipate reducing power. This work provides the insight of reducing power distribution and PPB biohydrogen production variated by ammonia loading under continuous feeding mode.
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Affiliation(s)
- Peitian Huang
- Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, 637335, Singapore; Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore
| | - Yun Chen
- Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Zong Li
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Baorui Zhang
- Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, 637335, Singapore; Nanyang Environment & Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore, 637141, Singapore
| | - Siwei Yu
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yan Zhou
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
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3
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Liang J, Zhang P, Zhang R, Chang J, Chen L, Zhang G, Wang A. Bioconversion of volatile fatty acids from organic wastes to produce high-value products by photosynthetic bacteria: A review. ENVIRONMENTAL RESEARCH 2024; 242:117796. [PMID: 38040178 DOI: 10.1016/j.envres.2023.117796] [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: 09/17/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 12/03/2023]
Abstract
Anaerobic fermentation of organic waste to produce volatile fatty acids (VFAs) production is a relatively mature technology. VFAs can be used as a cheap and readily available carbon source by photosynthetic bacteria (PSB) to produce high value-added products, which are widely used in various applications. To better enhance the VFAs obtained from organic wastes for PSB to produce high value-added products, a comprehensive review is needed, which is currently not available. This review systematically summarizes the current status of microbial proteins, H2, poly-β-hydroxybutyrate (PHB), coenzyme Q10 (CoQ10), and 5-aminolevulinic acid (ALA) production by PSB utilizing VFAs as a carbon resource. Meanwhile, the metabolic pathways involved in the H2, PHB, CoQ10, and 5-ALA production by PSB were deeply explored. In addition, a systematic resource utilization pathway for PSB utilizing VFAs from anaerobic fermentation of organic wastes to produce high value-added products was proposed. Finally, the current challenges and priorities for future research were presented, such as the screening of efficient PSB strains, conducting large-scale experiments, high-value product separation, recovery, and purification, and the mining of metabolic pathways for the VFA utilization to generate high value-added products by PSB.
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Affiliation(s)
- Jinsong Liang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China
| | - Panyue Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Ru Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Jianning Chang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Le Chen
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China; Key Laboratory of Environmental Biotechnology, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Aijie Wang
- Key Laboratory of Environmental Biotechnology, Chinese Academy of Sciences, Beijing, 100085, China.
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Luotong R, Gongsong L, Bin D, Zhenxi W, Sheng X, Siyu C, Danping H, Xiaoguang C. Temporal and spatial variations in the physical and chemical properties of anaerobic granular sludge within a Pilot Spiral Symmetry Stream Anaerobic Bioreactor. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168390. [PMID: 37952660 DOI: 10.1016/j.scitotenv.2023.168390] [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: 08/18/2023] [Revised: 10/25/2023] [Accepted: 11/05/2023] [Indexed: 11/14/2023]
Abstract
Anaerobic granular sludge (AGS) determines the high performance of the bioreactor. To study the regionalization of granular sludge in the bioreactor, a Pilot Spiral Symmetry Stream Anaerobic Bioreactor (P-SSSAB) was established over 216 days, divided into three zones (I, II, and III) from bottom to top. AGS at the bottom of P-SSSAB had a higher porosity (60.35 %-83.27 %) and more suitable settling velocity (60 m/h) when the particle size range was 1.0-2.0 mm. This proved the better metabolic activity and superior settling performance in zone I than in zones II and III. In addition, the elemental composition of AGS in various zones was analyzed. The relative content of iron (5.66 %, 3.36 %, and 1.38 %, respectively) and sulfur (2.47 %, 2.19 %, and 1.49 %, respectively) in zone I, II, and III tended to decrease with the height of P-SSSAB. This also verified the better mass transfer performance and operational stability in lower zone than in upper zone. However, the monitoring of bed temperature in various zones revealed that the microbial activity in zone I was 6.7×10-12~3.5×10-2 times and 1.8×10-15~1.4×10-3 times that in zones II and III, respectively, which indicated that the unit activity of AGS in zone I was the worst. It indicated that AGS in lower zone had poor unit activity but had the highest unit capacity due to the high sludge concentration. Besides, the unit capacity of the upper zone was too weak to produce enough alkalinity to neutralize acid produced by excessive hydrolysis and acidification in lower zone, resulting in the worst treatment efficiency of the upper zone. Therefore, temperature and concentration ratios under various spatial distributions in bioreactors are vital to the overall sewage treatment stability and efficiency of bioreactors in actual engineering applications.
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Affiliation(s)
- Ren Luotong
- Shanghai Frontier Science Research Center for Modern Textiles, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Li Gongsong
- Shanghai Frontier Science Research Center for Modern Textiles, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Dong Bin
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Wang Zhenxi
- College of Science, Nanchang Institute of Technology, Nanchang 330099, China
| | - Xu Sheng
- College of Science, Nanchang Institute of Technology, Nanchang 330099, China
| | - Chen Siyu
- Sichuan Provincial Key Lab of Process Equipment and Control, School of Mechanical Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
| | - Huang Danping
- Sichuan Provincial Key Lab of Process Equipment and Control, School of Mechanical Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
| | - Chen Xiaoguang
- Shanghai Frontier Science Research Center for Modern Textiles, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
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5
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Sun Y, Sun Y, Li X. Removal of pollutants and accumulation of high-value cell inclusions in a batch reactor containing Rhodopseudomonas for treating real heavy oil refinery wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118834. [PMID: 37659365 DOI: 10.1016/j.jenvman.2023.118834] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 08/11/2023] [Accepted: 08/13/2023] [Indexed: 09/04/2023]
Abstract
Treating wastewater using purple non-sulfur bacteria (PNSB) is an environmentally friendly technique that can simultaneously remove pollutants and lead to the accumulation of high-value cell inclusions. However, no PNSB system for treating heavy oil refinery wastewater (HORW) and recovering high-value cell inclusions has yet been developed. In this study, five batch PNSB systems dominated by Rhodopseudomonas were used to treat real HORW for 186 d. The effects of using different hydraulic retention times (HRT), sludge retention times (SRT), trace element solutions, phosphate loads, and influent loads were investigated, and the bacteriochlorophyll, carotenoid, and coenzyme Q10 concentrations were determined. The community structure and quantity of Rhodopseudomonas in the systems were determined using a high-sequencing technique and quantitative polymerase chain reaction technique. The long-term results indicated that phosphate was the limiting factor for treating HORW in the PNSB reactor. The soluble chemical oxygen demand (SCOD) removal rates were 67.03% and 85.26% without and with phosphate added, respectively, and the NH4+-N removal rates were 32.18% and 89.22%, respectively. The NO3--N concentration in the effluent was stable at 0-3 mg/L with or without phosphate added. Adding phosphate increased the Rhodopseudomonas relative abundance and number by 13.21% and 41.61%, respectively, to 57.35% and 8.52 × 106 gene copies/μL, respectively. The SRT was the limiting factor for SCOD removal, and the bacteria concentration was the limiting factor for nitrogen removal. Once the inflow load had been increased, the total nitrogen (TN) removal rate increased as the HRT increased. Maximum TN removal rates of 64.46%, 68.06%, 73.89%, 82.15%, and 89.73% were found at HRT of 7, 10, 13, 16, and 19 d, respectively. The highest bacteriochlorophyll, carotenoid, and coenzyme Q10 concentrations were 2.92, 4.99, and 4.53 mg/L, respectively. This study provided a simple and efficient method for treating HORW and reutilizing resources, providing theoretical support and parameter guidance for the application of Rhodopseudomonas in treating HORW.
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Affiliation(s)
- Yujie Sun
- College of Water Science, Beijing Normal University, Beijing, 100875, China
| | - Yujiao Sun
- College of Water Science, Beijing Normal University, Beijing, 100875, China.
| | - Xiangkun Li
- Civil Engineering and Transportation, Hebei University of Technology, Tianjin, 300401, China.
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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: 10] [Impact Index Per Article: 5.0] [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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Li X, Xie H, Liu G, Zhang R, Ma X, Chen H. Optimizing temperature for enhancing waste activated sludge decomposition in lysozyme and rhamnolipid pretreatment system. BIORESOURCE TECHNOLOGY 2021; 341:125868. [PMID: 34523578 DOI: 10.1016/j.biortech.2021.125868] [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: 07/16/2021] [Revised: 08/27/2021] [Accepted: 08/28/2021] [Indexed: 06/13/2023]
Abstract
This study investigated the influence of temperature on the hydrolysis and decomposition of waste activated sludge (WAS) during the enhanced pretreatment system with lysozyme and rhamnolipid (Ly + RL). Results showed that temperature increasing from 15℃ to 55℃ could obviously enhance the release of soluble organic matters and WAS decomposition degree within the Ly + RL pretreatment system. Compared to the sum of sole Ly and sole RL pretreatment, Ly + RL combined pretreatment system at 45℃ presented best synergistic hydrolysis performance. The decomposition degree of bacteria and archaea reached 47.6% and 88.1%, respectively. Meanwhile, increasing temperature could recede the diversity of microbial community in the system. Gammaproteobacteria, with the relative abundance of 90.7%, occupied the absolute dominant position at 45℃. Furthermore, with the rise of temperature, more volatile fatty acids were harvested after anaerobic fermentation.
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Affiliation(s)
- Xiangkun Li
- School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Hongwei Xie
- School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Gaige Liu
- School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, PR China.
| | - Ruijun Zhang
- School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Xiaochen Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Hongying Chen
- School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
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Chen X, Zhou W, Li G, Song Q, Ismail M, Wang Y, Ren L, Cheng C. Anaerobic biodegradation of soybean-process wastewater: Operation strategy and sludge bed characteristics of a high-performance Spiral Symmetric Stream Anaerobic Bioreactor. WATER RESEARCH 2021; 197:117095. [PMID: 33862392 DOI: 10.1016/j.watres.2021.117095] [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: 12/16/2020] [Revised: 03/22/2021] [Accepted: 03/27/2021] [Indexed: 06/12/2023]
Abstract
A 300m3/d demonstration project of soybean-process wastewater has been established recently with a Spiral Symmetric Stream Anaerobic Bioreactor (SSSAB) as the core. In order to obtain the optimal operation strategy for a full-scale SSSAB and to make it run efficiently and stably in a demonstration project, a Pilot-scale SSSAB (P-SSSAB, effective volume 100 L) was performed for the treatment of soybean-process wastewater over 216 days. The volumetric load rate (VLR) range of the P-SSSAB was 0.32~27.17 kg COD/(m3·d), where the highest VLR [27.17 kg COD/(m3·d)] was 2.01 times to the highest value [13.5 kg COD/(m3·d)] reported. The pH and VFA/ALK of the effluent from the P-SSSAB were in the range of 6.9 up to 9.2 and 0.03 up to 0.17, respectively. The methane yield of the P-SSSAB increased from 0.03 m3/kg COD to 0.47 m3/kg COD, which was 3.36 times to the maximum value (0.14 m3/kg COD) reported. To meet the influent requirement of the aerobic biological treatment in demonstration project (influent COD ≤ 1.5 g/L), the maximum VLR of SSSAB was optimal at about 22 kg COD/(m3·d). By analyzing the sludge bed characteristics of the P-SSSAB, it was obvious that zone I (the bottom of the bed) was the major contributor of the COD removal, while zone III (the upper part of the bed) was the major contributor for the NH4+-N increase. The anaerobic granular sludge (AGS) in the bed showed a good granulation. The average MLVSS/MLSS value in sludge bed was about 0.7, and PN/PS in TB-EPS (zone I, II and III) increased to 6.830, 4.257, and 3.747, respectively. SMA and coenzyme F420 values of zone III were the maximum [666.35 ml CH4/(g VSS·d) and 0.690 mol/g VSS, respectively]. According to the analysis obtained from the 16S rRNA high-throughput sequencing, the microbial community in the AGS had been more specific to the soybean-process wastewater since the bacteria Firmicutes were increased. The relative abundance of microbe which perform direct interspecies electron transfer (DIET) for the syntrophic degradation of VFAs and production of the methane has been increased significantly, such as the bacteria Syntrophomonas and archaea Methanosaeta.
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Affiliation(s)
- Xiaoguang Chen
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China.
| | - Weizhu Zhou
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Gongsong Li
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Qi Song
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Muhammad Ismail
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Yiqi Wang
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Luotong Ren
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Chen Cheng
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
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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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New progress of ammonia recovery during ammonia nitrogen removal from various wastewaters. World J Microbiol Biotechnol 2020; 36:144. [PMID: 32856187 DOI: 10.1007/s11274-020-02921-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 08/22/2020] [Indexed: 12/17/2022]
Abstract
The recovery of ammonia-nitrogen during wastewater treatment and water purification is increasingly critical in energy and economic development. The concentration of ammonia-nitrogen in wastewater is different depending on the type of wastewater, making it challenging to select ammonia-nitrogen recovery technology. Meanwhile, the conventional nitrogen removal method wastes ammonia-nitrogen resources. Based on the circular economy, this review comprehensively introduces the characteristics of several main ammonia-nitrogen source wastewater plants and their respective challenges in treatment, including municipal wastewater, industrial wastewater, livestock and poultry wastewater and landfill leachate. Furthermore, we introduce the main methods currently adopted in the ammonia-nitrogen removal process of wastewater from physical (air stripping, ion exchange and adsorption, membrane and capacitive deionization), chemical (chlorination, struvite precipitation, electrochemical oxidation and photocatalysis) and biological (classical and typical activated sludge, novel methods based on activated sludge, microalgae and photosynthetic bacteria) classification based on the ammonia recovery concept. We discuss the applicable methods of recovering ammonia nitrogen in several main wastewater plants. Finally, we prospect the research direction of ammonia removal and recovery in wastewater based on sustainable development.
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Capson-Tojo G, Batstone DJ, Grassino M, Vlaeminck SE, Puyol D, Verstraete W, Kleerebezem R, Oehmen A, Ghimire A, Pikaar I, Lema JM, Hülsen T. Purple phototrophic bacteria for resource recovery: Challenges and opportunities. Biotechnol Adv 2020; 43:107567. [PMID: 32470594 DOI: 10.1016/j.biotechadv.2020.107567] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/11/2020] [Accepted: 05/14/2020] [Indexed: 10/24/2022]
Abstract
Sustainable development is driving a rapid focus shift in the wastewater and organic waste treatment sectors, from a "removal and disposal" approach towards the recovery and reuse of water, energy and materials (e.g. carbon or nutrients). Purple phototrophic bacteria (PPB) are receiving increasing attention due to their capability of growing photoheterotrophically under anaerobic conditions. Using light as energy source, PPB can simultaneously assimilate carbon and nutrients at high efficiencies (with biomass yields close to unity (1 g CODbiomass·g CODremoved-1)), facilitating the maximum recovery of these resources as different value-added products. The effective use of infrared light enables selective PPB enrichment in non-sterile conditions, without competition with other phototrophs such as microalgae if ultraviolet-visible wavelengths are filtered. This review reunites results systematically gathered from over 177 scientific articles, aiming at producing generalized conclusions. The most critical aspects of PPB-based production and valorisation processes are addressed, including: (i) the identification of the main challenges and potentials of different growth strategies, (ii) a critical analysis of the production of value-added compounds, (iii) a comparison of the different value-added products, (iv) insights into the general challenges and opportunities and (v) recommendations for future research and development towards practical implementation. To date, most of the work has not been executed under real-life conditions, relevant for full-scale application. With the savings in wastewater discharge due to removal of organics, nitrogen and phosphorus as an important economic driver, priorities must go to using PPB-enriched cultures and real waste matrices. The costs associated with artificial illumination, followed by centrifugal harvesting/dewatering and drying, are estimated to be 1.9, 0.3-2.2 and 0.1-0.3 $·kgdry biomass-1. At present, these costs are likely to exceed revenues. Future research efforts must be carried out outdoors, using sunlight as energy source. The growth of bulk biomass on relatively clean wastewater streams (e.g. from food processing) and its utilization as a protein-rich feed (e.g. to replace fishmeal, 1.5-2.0 $·kg-1) appears as a promising valorisation route.
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Affiliation(s)
- Gabriel Capson-Tojo
- Advanced Water Management Centre, The University of Queensland, Brisbane, QLD 4072, Australia; CRETUS Institute, Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Damien J Batstone
- Advanced Water Management Centre, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - María Grassino
- Advanced Water Management Centre, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Siegfried E Vlaeminck
- Research Group of Sustainable Energy, Air and Water Technology, Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium.
| | - Daniel Puyol
- Department of Chemical and Environmental Technology, ESCET, Rey Juan Carlos University, Móstoles, Spain.
| | - Willy Verstraete
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, 9000 Gent, Belgium; Avecom NV, Industrieweg 122P, 9032 Wondelgem, Belgium.
| | - Robbert Kleerebezem
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, the Netherlands.
| | - Adrian Oehmen
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Anish Ghimire
- Department of Environmental Science and Engineering, Kathmandu University, Dhulikhel, Nepal.
| | - Ilje Pikaar
- School of Civil Engineering, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Juan M Lema
- CRETUS Institute, Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Tim Hülsen
- Advanced Water Management Centre, The University of Queensland, Brisbane, QLD 4072, Australia.
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Hosakul P, Kantachote D, Saritpongteeraka K, Phuttaro C, Chaiprapat S. Upgrading industrial effluent for agricultural reuse: effects of digestate concentration and wood vinegar dosage on biosynthesis of plant growth promotor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:14589-14600. [PMID: 32048192 DOI: 10.1007/s11356-020-08014-w] [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: 10/18/2019] [Accepted: 02/05/2020] [Indexed: 06/10/2023]
Abstract
Emphasis on water reuse in agricultural sector receives a renewed interest to close the loop in circular economy, especially in dry and water-stressed regions. In this work, wastewater from cooperative smoked sheet rubber factory and the effluent (digestate) from its treatment system (anaerobic digester) were used as medium to grow purple non-sulfur bacteria (PNSB), Rhodopseudomonas palustris strain PP803, with wood vinegar supplement at mid-log growth phase to stimulate the release of 5-aminolevulinic acid (ALA), a plant growth promotor. Wastewater-to-digestate ratios (D:W) represented by soluble chemical oxygen demand (SCOD) were found to influence both the growth of R. palustris and synthesis of ALA. The highest ALA release of 16.02 ± 0.75 μM and the biomass accumulation of 1302 ± 78 mg/L were obtained from the medium SCOD of 4953 mg/L. Although retarding biomass accumulation by 28-36%, wood vinegar (WV) addition was proven to improve ALA release by 40%. Result suggested that SCOD of 3438 mg/L (75:25 D:W) contained sufficient carbon source for PNSB growth and was chosen to subsequently run the photo-bioreactor (PBR) to sustain R. palustris PP803 cells production. In continuous PBR operation, PNSB proliferation suffered from the low organic concentration in PBR at low organic loading. An organic loading increase to 1.21 g COD/L day was found to attain highest biomass concentration and longest PNSB dominant period over microalgea. In this study, a real-time monitoring protocol of PNSB and microalgae was specifically developed based on image color analysis at acceptable accuracy (R2 = 0.94). In the final assay, verification of the PBR-grown inoculant was conducted and ALA release efficiency was discussed under various wood vinegar dosages and dosing frequencies. This work has advanced our understandings closer to practical field application.
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Affiliation(s)
- Passagorn Hosakul
- Department of Civil Engineering, Environmental Engineering Program, Faculty of Engineering, Prince of Songkla University, Songkhla, 90112, Thailand
| | - Duangporn Kantachote
- Department of Microbiology, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand
| | - Kanyarat Saritpongteeraka
- Department of Civil Engineering, Environmental Engineering Program, Faculty of Engineering, Prince of Songkla University, Songkhla, 90112, Thailand
- Center of Excellence on Energy Technology and Environment, Postgraduate and Research Development Office (PERDO), Bangkok, 10400, Thailand
| | - Chettaphong Phuttaro
- Department of Civil Engineering, Environmental Engineering Program, Faculty of Engineering, Prince of Songkla University, Songkhla, 90112, Thailand
- Center of Excellence on Energy Technology and Environment, Postgraduate and Research Development Office (PERDO), Bangkok, 10400, Thailand
| | - Sumate Chaiprapat
- Department of Civil Engineering, Environmental Engineering Program, Faculty of Engineering, Prince of Songkla University, Songkhla, 90112, Thailand.
- PSU Energy Systems Research Institute (PERIN), Prince of Songkla University, Songkhla, 90112, Thailand.
- Department of Civil Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, 90112, Thailand.
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13
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Chen J, Wei J, Ma C, Yang Z, Li Z, Yang X, Wang M, Zhang H, Hu J, Zhang C. Photosynthetic bacteria-based technology is a potential alternative to meet sustainable wastewater treatment requirement? ENVIRONMENT INTERNATIONAL 2020; 137:105417. [PMID: 32120141 DOI: 10.1016/j.envint.2019.105417] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/22/2019] [Accepted: 12/11/2019] [Indexed: 05/23/2023]
Abstract
A paradigm shift is underway in wastewater treatment from pollution removal to resource or energy recovery. However, conventional activated sludge (CAS) as the core technology of wastewater treatment is confronted with severe challenges on high energy consumption, sludge disposal and inevitable greenhouse gas emission, which are posing a serious impact on the current wastewater industry. It is urgent to find new alternative methods to remedy these defects. Photosynthetic bacteria (PSB) have flexible metabolic modes and high tolerance, which enhance the removal of nutrients, heavy metals and organic contaminants efficiency in different wastewater. The unique phototrophic growth of PSB breaks the restriction of nutrient metabolism in the CAS system. Recent studies have shown that PSB-based technologies can not only achieve the recovery of nutrient and energy, but also improve the degradation efficiency of refractory substances. If the application parameters can be determined, there will be great prospects and economic effects. This review summarizes the research breakthroughs and application promotion of PSB-based wastewater treatment technology in recent years. Comparing discussed the superiority and inferiority from the perspective of application range, performance differences and recovery possibility. Pathways involved in the nutrient substance and the corresponding influencing parameters are also described in detail. The mode of PSB biodegradation processes presented a promising alternative for new wastewater treatment scheme. In the future, more mechanical and model studies, deterministic operating parameters, revolutionary process design is need for large-scale industrial promotion of PSB-based wastewater treatment.
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Affiliation(s)
- Jiaqi Chen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Jingjing Wei
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chi Ma
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Zhongzhu Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Zihao Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Xu Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Mingsheng Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Huaqing Zhang
- Qinglin Environmental Protection Co. Ltd., Ningbo 315000, China
| | - Jiawei Hu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
| | - Chang Zhang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China.
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14
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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: 17] [Impact Index Per Article: 3.4] [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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Liu G, Li X, Ma L, Ma X, Chen H. Enhancement of excess sludge hydrolysis and decomposition by combined lysozyme and rhamnolipid pretreatment. BIORESOURCE TECHNOLOGY 2019; 289:121703. [PMID: 31271912 DOI: 10.1016/j.biortech.2019.121703] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 06/22/2019] [Accepted: 06/25/2019] [Indexed: 06/09/2023]
Abstract
Feasibility of combined lysozyme and rhamolipid (RL) pretreatment on the enhancement of excess sludge (ES) hydrolysis and decomposition was assessed in this study. Results showed lysozyme and RL combined treatment could significantly promote ES hydrolysis and decomposition, an additional 1196.9 mg/L soluble chemical oxygen demand (SCOD), 792.5 mg/L protein and 133.5 mg/L polysaccharide were released compared with the sum of sole RL and sole lysozyme treatment at the optimal RL dosage of 0.3 g/gSS and lysozyme dosage of 0.15 g/gSS after 8 h co-digestion. 45.3% bacteria and 84.5% archaea decomposition degree were gained under the combined treatment at the optimal RL dosage. Class Gammaproteobacteria and genus Methanothrix were the predominant bacteria and archaea with the relative abundance of 72.4% and 60.8%, respectively. After the combined pretreatment, ES was beneficial for volatile fatty acids accumulation and acetic acid dependent methane generating inferred from the results of microbial community composition.
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Affiliation(s)
- Gaige Liu
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiangkun Li
- School of Environment, Harbin Institute of Technology, Harbin 150090, China; School of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China.
| | - Linli Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiaochen Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hongying Chen
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
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16
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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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17
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Liu G, Wang K, Li X, Ma L, Ma X, Chen H. Enhancement of excess sludge hydrolysis and decomposition with different lysozyme dosage. JOURNAL OF HAZARDOUS MATERIALS 2019; 366:395-401. [PMID: 30551085 DOI: 10.1016/j.jhazmat.2018.12.002] [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: 07/18/2018] [Revised: 11/26/2018] [Accepted: 12/01/2018] [Indexed: 06/09/2023]
Abstract
The performance of the lysozyme catalysis on excess sludge (ES) hydrolysis and decomposition was investigated in this study. For this purpose, the release of soluble organic matters from sludge flocs, extracellular polymeric substances (EPS) changes in composition and distribution and the quantity variations of microorganisms were monitored. Results indicated that lysozyme boosted the ES hydrolysis significantly with approximately 236.5 mg/L soluble chemical oxygen demand (SCOD), 58.6 mg/L polysaccharide and 662.7 mg/L protein release within 240 min at the lysozyme dosage of 150 mg/gSS. Arising lysozyme dosages (from 0 to 150 mg/gSS step by step) could dramatically enhance the efficiency of the enzyme on ES with the concentration of polysaccharide increased from 84.6 mg/L to 143.2 mg/L and protein increased from 325.0 mg/L to 987.7 mg/L in total EPS. The decomposition effect of lysozyme on microorganisms improved with dosage, about 15.4%, 17.5% and 20.2% bacteria and 56.3%, 57.2% and 65.0% archaea were disintegrated at the lysozyme dosages of 50, 100 and 150 mg/gSS, respectively. However, fungi were barely influenced by the enzymatic catalysis. Tryptophan-protein like substances and aromatic protein were the dominant ES lysis compositions in EPS.
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Affiliation(s)
- Gaige Liu
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ke Wang
- School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Xiangkun Li
- School of Environment, Harbin Institute of Technology, Harbin 150090, China; School of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China.
| | - Linli Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xiaochen Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hongying Chen
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
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18
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Effects of light-oxygen conditions on microbial community of photosynthetic bacteria during treating high-ammonia wastewater. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.06.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Liu S, Zheng Z, Tie J, Kang J, Zhang G, Zhang J. Impacts of Fe 2+ on 5-aminolevulinic acid (ALA) biosynthesis of Rhodobacter sphaeroides in wastewater treatment by regulating nif gene expression. J Environ Sci (China) 2018; 70:11-19. [PMID: 30037398 DOI: 10.1016/j.jes.2017.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 11/02/2017] [Accepted: 11/02/2017] [Indexed: 06/08/2023]
Abstract
This study aimed to increase bacterial growth and 5-aminolevulinic acid (ALA) biosynthesis of Rhodobacter sphaeroides in wastewater treatment through adding ferrous ion (Fe2+). Results demonstrated that Fe2+ effectively enhanced the biomass production and ALA yield of R. sphaeroides. Moreover, the optimal Fe2+ dosage was found to be 400μmol/L, which was associated with the highest biomass of 4015.3mg/L and maximum ALA yield of 15.9mg/g-dry cell weight (mg/g-DCW). Mechanism analysis revealed that Fe2+ vastly improved Adenosine Triphosphate (ATP) production by up-regulating the nif gene expression, and increasing ATP enhanced the biomass and ALA yield by supplying energy for bacterial growth and ALA biosynthesis, respectively. Correlation analysis showed that the ALA and ATP yields had positive relation with nifA and nifU gene expression. In addition, the nifA and nifU gene expression displayed high consistency of co-transcription at the optimal Fe2+ dosage.
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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.
| | - Zhihong Zheng
- 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
| | - Jingxi Tie
- 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
| | - 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 and Resource, Renmin University of China, Beijing 100872, China
| | - Jie Zhang
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
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20
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Hokamura A, Yunoue Y, Goto S, Matsusaki H. Biosynthesis of Polyhydroxyalkanoate from Steamed Soybean Wastewater by a Recombinant Strain of Pseudomonas sp. 61-3. Bioengineering (Basel) 2017; 4:bioengineering4030068. [PMID: 28952548 PMCID: PMC5615314 DOI: 10.3390/bioengineering4030068] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 08/03/2017] [Accepted: 08/04/2017] [Indexed: 11/20/2022] Open
Abstract
Pseudomonas sp. 61-3 accumulates a blend of poly(3-hydroxybutyrate) [P(3HB)] homopolymer and a random copolymer, poly(3-hydroxybutyrate-co-3-hydroxyalkanoate) [P(3HB-co-3HA)], consisting of 3HA units of 4–12 carbon atoms. Pseudomonas sp. 61-3 possesses two types of PHA synthases, PHB synthase (PhbC) and PHA synthases (PhaC1 and PhaC2), encoded by the phb and pha loci, respectively. The P(94 mol% 3HB-co-6 mol% 3HA) copolymer synthesized by the recombinant strain of Pseudomonas sp. 61-3 (phbC::tet) harboring additional copies of phaC1 gene is known to have desirable physical properties and to be a flexible material with moderate toughness, similar to low-density polyethylene. In this study, we focused on the production of the P(3HB-co-3HA) copolymer using steamed soybean wastewater, a by-product in brewing miso, which is a traditional Japanese seasoning. The steamed soybean wastewater was spray-dried to produce a powder (SWP) and used as the sole nitrogen source for the synthesis of P(3HB-co-3HA) by the Pseudomonas sp. 61-3 recombinant strain. Hydrolyzed SWP (HSWP) was also used as a carbon and nitrogen source. P(3HB-co-3HA)s with relatively high 3HB fractions could be synthesized by a recombinant strain of Pseudomonas sp. 61-3 (phbC::tet) harboring additional copies of the phaC1 gene in the presence of 2% glucose and 10–20 g/L SWP as the sole nitrogen source, producing a PHA concentration of 1.0–1.4 g/L. When HSWP was added to a nitrogen- and carbon-free medium, the recombinant strain could synthesize PHA without glucose as a carbon source. The recombinant strain accumulated 32 wt% P(3HB-co-3HA) containing 80 mol% 3HB and 20 mol% medium-chain-length 3HA with a PHA concentration of 1.0 g/L when 50 g/L of HSWP was used. The PHA production yield was estimated as 20 mg-PHA/g-HSWP, which equates to approximately 1.0 g-PHA per liter of soybean wastewater.
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Affiliation(s)
- Ayaka Hokamura
- Department of Food and Health Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan.
| | - Yuko Yunoue
- Department of Food and Health Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan.
| | - Saki Goto
- Department of Food and Health Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan.
| | - Hiromi Matsusaki
- Department of Food and Health Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan.
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21
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Liu S, Zhang G, Li J, Li X, Zhang J. Optimization of Biomass and 5-Aminolevulinic Acid Production by Rhodobacter sphaeroides ATCC17023 via Response Surface Methodology. Appl Biochem Biotechnol 2016; 179:444-58. [PMID: 26875086 DOI: 10.1007/s12010-016-2005-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 01/28/2016] [Indexed: 10/22/2022]
Abstract
Microbial 5-aminolevulinic acid (ALA) produced from wastewater is considered as potential renewable energy. However, many hurdles are needed to be overcome such as the regulation of key influencing factors on ALA yield. Biomass and ALA production by Rhodobacter sphaeroides was optimized using response surface methodology. The culturing medium was artificial volatile fatty acids wastewater. Three additives were optimized, namely succinate and glycine that are precursors of ALA biosynthesis, and D-glucose that is an inhibitor of ALA dehydratase. The optimal conditions were achieved by analyzing the response surface plots. Statistical analysis showed that succinate at 8.56 mmol/L, glycine at 5.06 mmol/L, and D-glucose at 7.82 mmol/L were the best conditions. Under these optimal conditions, the highest biomass production and ALA yield of 3.55 g/L and 5.49 mg/g-biomass were achieved. Subsequent verification experiments at optimal values had the maximum biomass production of 3.41 ± 0.002 g/L and ALA yield of 5.78 ± 0.08 mg/g-biomass.
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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
| | - Guangming Zhang
- School of Environment and Resource, Renmin University of China, Beijing, 100872, China. .,School of Municipal and Environmental Engineering, Harbin Institute of Technology, Huanghe Road 73, Harbin, 150090, China.
| | - Jianzheng Li
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Huanghe Road 73, Harbin, 150090, China
| | - Xiangkun Li
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Huanghe Road 73, Harbin, 150090, China
| | - Jie Zhang
- School of Municipal and Environmental Engineering, Harbin Institute of Technology, Huanghe Road 73, Harbin, 150090, China
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