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Camargo FP, Lourenço V, Rodrigues CV, Sabatini CA, Adorno MAT, Silva EL, Varesche MBA. Bio-CH 4 yield of swine manure and food waste optimized by co-substrate proportions diluted in domestic sewage and pH interactions using the response surface approach. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119308. [PMID: 37883832 DOI: 10.1016/j.jenvman.2023.119308] [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: 09/01/2023] [Revised: 10/09/2023] [Accepted: 10/09/2023] [Indexed: 10/28/2023]
Abstract
This research aimed at evaluating optimal conditions to obtain value-added metabolites, such as bio-CH4, by co-digesting swine manure and food waste diluted in domestic sewage. The assays were carried out in batches using the statistical methods of Rotational Central Composite Design (RCCD) and Surface Response to evaluate the ranges of food waste (1.30-9.70 gTS.L-1), pH (6.16-7.84) and granular Upflow Anaerobic Sludge Blanket sludge as inoculum (2.32-5.68 gTS.L-1), besides about 250 mL of swine manure in 500 mL Duran flasks. According to the RCCD matrix, bio-CH4 yields among 600.6 ± 60.1 and 2790.0 ± 112.0 mL CH4 gTS.L-1 were observed, besides the maximum CH4 production rate between 0.4 ± 0.5 and 49.7 ± 2.0 mL CH4 h-1 and λ between ≤0.0 and 299.3 ± 4.5 h. In the validation assay, the optimal conditions of 9.98 gTS.L-1 of food waste, pH adjusted to 8.0 and 2.20 gTS.L-1 of inoculum were considered, and the bio-CH4 yield obtained (5640.79 ± 242.98 mL CH4 gTS.L-1 or also 5201.83 ± 224.07 mL CH4 gTVS.L-1) was 11.3 times higher than in assays before optimization (499.3 ± 16.0 mL CH4 gTS.L-1) with 5 gTS.L-1 of food waste, 3 gTS.L-1 of inoculum and pH 7.0. Besides, the results observed about the energetic balance of the control and validation assays highlight the importance of process optimization, as this condition was the only one with energy supply higher than the energy required for its operation, exceeding max consumption sevenfold. Based on the most dominant microorganisms (Methanosaeta, 31.06%) and the metabolic inference of the validation assay, it could be inferred that the acetoclastic methanogenesis was the predominant pathway to CH4 production.
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Affiliation(s)
- Franciele P Camargo
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Vitor Lourenço
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Caroline Varella Rodrigues
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Carolina Aparecida Sabatini
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Maria Angela Tallarico Adorno
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Edson L Silva
- Department of Chemical Engineering, Federal University of São Carlos, Rod Washington Luiz, Km 235, SP 310, 13565-905, São Carlos, SP, Brazil
| | - Maria Bernadete A Varesche
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo, Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil.
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Usmani Z, Sharma M, Gaffey J, Sharma M, Dewhurst RJ, Moreau B, Newbold J, Clark W, Thakur VK, Gupta VK. Valorization of dairy waste and by-products through microbial bioprocesses. BIORESOURCE TECHNOLOGY 2022; 346:126444. [PMID: 34848333 DOI: 10.1016/j.biortech.2021.126444] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/21/2021] [Accepted: 11/24/2021] [Indexed: 06/13/2023]
Abstract
Waste is an inherent and unavoidable part of any process which can be attributed to various factors such as process inefficiencies, usability of resources and discarding of not so useful parts of the feedstock. Dairy is a burgeoning industry following the global population growth, resulting in generation of waste such as wastewater (from cleaning, processing, and maintenance), whey and sludge. These components are rich in nutrients, organic and inorganic materials. Additionally, the presence of alkaline and acidic detergents along with sterilizing agents in dairy waste makes it an environmental hazard. Thus, sustainable valorization of dairy waste requires utilization of biological methods such as microbial treatment. This review brings forward the current developments in utilization and valorization of dairy waste through microbes. Aerobic and anaerobic treatment of dairy waste using microbes can be a sustainable and green method to generate biofertilizers, biofuels, power, and other biobased products.
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Affiliation(s)
- Zeba Usmani
- Department of Applied Biology, University of Science and Technology, Meghalaya 793101, India
| | - Minaxi Sharma
- Department of Applied Biology, University of Science and Technology, Meghalaya 793101, India
| | - James Gaffey
- Circular Bioeconomy Research Group, Shannon Applied Biotechnology Centre, Munster Technological University, Kerry, Ireland
| | - Monika Sharma
- Department of Botany, Shri Awadh Raz Singh Smarak Degree College, Gonda, Uttar Pradesh, India
| | - Richard J Dewhurst
- Dairy Research Centre, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK
| | - Benoît Moreau
- Laboratoire de "Chimie verte et Produits Biobasés", Haute Ecole Provinciale du Hainaut- Département AgroBioscience et Chimie, 11, rue de la Sucrerie, 7800 Ath, Belgique
| | | | - William Clark
- Zero Waste Scotland, Moray House, Forthside Way, Stirling FK8 1QZ, UK
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Center, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK; Department of Mechanical Engineering, School of Engineering, Shiv Nadar University, Uttar Pradesh 201314, India; School of Engineering, University of Petroleum & Energy Studies (UPES), Dehradun, Uttarakhand, India
| | - Vijai Kumar Gupta
- Biorefining and Advanced Materials Research Center, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK; Center for Safe and Improved Food, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK.
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Camargo FP, Sakamoto IK, Delforno TP, Mariadassou M, Loux V, Midoux C, Duarte ICS, Silva EL, Bize A, Varesche MBA. Microbial and functional characterization of an allochthonous consortium applied to hydrogen production from Citrus Peel Waste in batch reactor in optimized conditions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 291:112631. [PMID: 33932835 DOI: 10.1016/j.jenvman.2021.112631] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 03/26/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
Energy recovery from lignocellulosic waste has been studied as an alternative to the problem of inappropriate waste disposal. The present study aimed at characterizing the microbial community and the functional activity of reactors applied to H2 production through lignocellulosic waste fermentation in optimized conditions. The latter were identified by means of Rotational Central Composite Design (RCCD), applied to optimize allochthonous inoculum concentration (2.32-5.68 gTVS/L of granular anaerobic sludge), pH (4.32-7.68) and Citrus Peel Waste (CPW) concentration (1.55-28.45 g/L). After validation, the conditions identified for optimal H2 production were 4 gSTV/L of allochthonous inoculum, 29.8 g/L of CPW (substrate) and initial pH of 8.98. In these conditions, 48.47 mmol/L of H2 was obtained, which is 3.64 times higher than the concentration in unoptimized conditions (13.31 mmol H2/L using 15 g/L of CPW, 2 gTVS/L of allochthonous inoculum, pH 7.0). Acetogenesis was the predominant pathway, and maximal concentrations of 3,731 mg/L of butyric acid and 3,516 mg/L of acetic acid were observed. Regarding the metataxonomic profile, Clostridium genus was dramatically favored in the optimized condition (79.78%) when compared to the allochthonous inoculum (0.43%). It was possible to identify several genes related to H2 (i.e dehydrogenases) and volatile fatty acids (VFA) production and with cellulose degradation, especially some CAZymes from the classes Auxiliary Activities, Glycoside Hydrolases and Glycosyl Transferase. By means of differential gene expression it was observed that cellulose degradation and acetic acid production pathways were overabundant in samples from the optimized reactors, highlighting endo-β-1,4-glucanase/cellulose, endo-β-1,4-xylanase, β-glucosidase, β-mannosidase, cellulose β-1,4-cellobiosidase, cellobiohydrolase, and others, as main the functions.
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Affiliation(s)
- Franciele Pereira Camargo
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo (USP), Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Isabel Kimiko Sakamoto
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo (USP), Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil
| | - Tiago Palladino Delforno
- Department of Biology, Federal University of São Carlos (UFSCar), João Leme dos Santos Highway, Km 101, zipcode 18052-780, Sorocaba, São Paulo, Brazil
| | - Mahendra Mariadassou
- Université Paris-Saclay, INRAE, BioinfOmics, MIGALE Bioinformatics Facility, 78350, Jouy-en-Josas, France; Université Paris Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France
| | - Valentin Loux
- Université Paris-Saclay, INRAE, BioinfOmics, MIGALE Bioinformatics Facility, 78350, Jouy-en-Josas, France; Université Paris Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France
| | - Cédric Midoux
- Université Paris-Saclay, INRAE, BioinfOmics, MIGALE Bioinformatics Facility, 78350, Jouy-en-Josas, France; Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement (PROSE), 92761, Antony, France; Université Paris Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France
| | - Iolanda Cristina Silveira Duarte
- Department of Biology, Federal University of São Carlos (UFSCar), João Leme dos Santos Highway, Km 101, zipcode 18052-780, Sorocaba, São Paulo, Brazil
| | - Edson Luiz Silva
- Department of Chemical Engineering, Federal University of São Carlos (UFSCar), Rod Washington Luiz, Km 235, SP 310, 13565-905, São Carlos, SP, Brazil
| | - Ariane Bize
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement (PROSE), 92761, Antony, France
| | - Maria Bernadete Amâncio Varesche
- Department of Hydraulics and Sanitation, School of Engineering of São Carlos, University of São Paulo (USP), Av. Trabalhador São Carlense, 400, 13566-590, São Carlos, SP, Brazil.
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Arutselvy B, Rajeswari G, Jacob S. Sequential valorization strategies for dairy wastewater and water hyacinth to produce fuel and fertilizer. J FOOD PROCESS ENG 2020. [DOI: 10.1111/jfpe.13585] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Balakrishnan Arutselvy
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology SRM Institute of Science and Technology Chennai Tamil Nadu India
| | - Gunasekaran Rajeswari
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology SRM Institute of Science and Technology Chennai Tamil Nadu India
| | - Samuel Jacob
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology SRM Institute of Science and Technology Chennai Tamil Nadu India
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Optimization of Cattle Manure and Food Waste Co-Digestion for Biohydrogen Production in a Mesophilic Semi-Continuous Process. ENERGIES 2020. [DOI: 10.3390/en13153848] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Biohydrogen production from organic solid waste has shown particular advantages over other methods owing to the combination of waste reduction and bioenergy production. In this study, biohydrogen production from the co-digestion of cattle manure and food waste was optimized in a mesophilic semi-continuous process. To maximize hydrogen production, the effects of the mixing ratio (the proportion of food waste in the substrate), substrate concentration, and hydraulic retention time (HRT) on the co-digestion were systematically analyzed using a Box–Behnken design. The results showed that strong interactive effects existed between the three factors, and they had a direct effect on the responses. Hydrogen was primarily produced via the butyrate pathway, which was accompanied by the competing heterolactic fermentation pathway. Propionate and valerate produced from lipids and proteins, respectively, were obtained along with butyrate. The optimal process parameters included a mixing ratio of 47% to 51%, a substrate concentration of 76 to 86 g L−1, and an HRT of 2 d. Under these optimal conditions, the hydrogen production rate and hydrogen yield were higher than 1.00 L L−1 d−1 and 30.00 mL g−1 VS, respectively, and the predicted results were consistent with the experimental data. The results indicate that the co-digestion of cattle manure and food waste is a practical and economically promising approach for biohydrogen production.
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Sanusi IA, Suinyuy TN, Lateef A, Kana GE. Effect of nickel oxide nanoparticles on bioethanol production: Process optimization, kinetic and metabolic studies. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.01.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Al-Shorgani NKN, Shukor H, Abdeshahian P, Kalil MS, Yusoff WMW, Hamid AA. Enhanced butanol production by optimization of medium parameters using Clostridium acetobutylicum YM1. Saudi J Biol Sci 2018; 25:1308-1321. [PMID: 30505175 PMCID: PMC6251989 DOI: 10.1016/j.sjbs.2016.02.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Revised: 01/03/2016] [Accepted: 02/11/2016] [Indexed: 11/15/2022] Open
Abstract
A new isolate of the solvent-producing Clostridium acetobutylicum YM1 was used to produce butanol in batch culture fermentation. The effects of glucose concentration, butyric acid addition and C/N ratio were studied conventionally (one-factor-at-a-time). Moreover, the interactions between glucose concentration, butyric acid addition and C/N ratio were further investigated to optimize butanol production using response surface methodology (RSM). A central composite design was applied, and a polynomial regression model with a quadratic term was used to analyze the experimental data using analysis of variance (ANOVA). ANOVA revealed that the model was highly significant (p < 0.0001) and the effects of the glucose and butyric acid concentrations on butanol production were significant. The model validation experiment showed 13.82 g/L butanol was produced under optimum conditions. Scale up fermentation in optimized medium resulted in 17 g/L of butanol and 21.71 g/L of ABE. The experimental data of scale up in 5 L bioreactor and flask scale were fitted to kinetic mathematical models published in the literature to estimate the kinetic parameters of the fermentation. The models used gave the best fit for butanol production, biomass and glucose consumption for both flask scale and bioreactor scale up.
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Affiliation(s)
- Najeeb Kaid Nasser Al-Shorgani
- School of Biosciences and Biotechnology, Faculty of Sciences and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
- Department of Applied Microbiology, Faculty of Applied Sciences, Taiz University, 6803 Taiz, Yemen
| | - Hafiza Shukor
- Department of Chemical and Process Engineering, Faculty of Engineering, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
| | - Peyman Abdeshahian
- Department of Chemical and Process Engineering, Faculty of Engineering, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
| | - Mohd Sahaid Kalil
- Department of Chemical and Process Engineering, Faculty of Engineering, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
| | - Wan Mohtar Wan Yusoff
- School of Biosciences and Biotechnology, Faculty of Sciences and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
| | - Aidil Abdul Hamid
- School of Biosciences and Biotechnology, Faculty of Sciences and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
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Yu X, Cabooter D, Dewil R. Effects of process variables and kinetics on the degradation of 2,4-dichlorophenol using advanced reduction processes (ARP). JOURNAL OF HAZARDOUS MATERIALS 2018; 357:81-88. [PMID: 29864691 DOI: 10.1016/j.jhazmat.2018.05.049] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 05/21/2018] [Accepted: 05/24/2018] [Indexed: 06/08/2023]
Abstract
This study aims at investigating the efficiency and kinetics of 2,4-DCP degradation via advanced reduction processes (ARP). Using UV light as activation method, the highest degradation efficiency of 2,4-DCP was obtained when using sulphite as a reducing agent. The highest degradation efficiency was observed under alkaline conditions (pH = 10.0), for high sulphite dosage and UV intensity, and low 2,4-DCP concentration. For all process conditions, first-order reaction rate kinetics were applicable. A quadratic polynomial equation fitted by a Box-Behnken Design was used as a statistical model and proved to be precise and reliable in describing the significance of the different process variables. The analysis of variance demonstrated that the experimental results were in good agreement with the predicted model (R2 = 0.9343), and solution pH, sulphite dose and UV intensity were found to be key process variables in the sulphite/UV ARP. Consequently, the present study provides a promising approach for the efficient degradation of 2,4-DCP with fast degradation kinetics.
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Affiliation(s)
- Xingyue Yu
- KU Leuven, Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis, Herestraat 49, B-3000 Leuven, Belgium; KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium
| | - Deirdre Cabooter
- KU Leuven, Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis, Herestraat 49, B-3000 Leuven, Belgium
| | - Raf Dewil
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium.
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Jang J, Lee DS. Magnetite nanoparticles supported on organically modified montmorillonite for adsorptive removal of iodide from aqueous solution: Optimization using response surface methodology. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 615:549-557. [PMID: 28988090 DOI: 10.1016/j.scitotenv.2017.09.324] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/28/2017] [Accepted: 09/30/2017] [Indexed: 06/07/2023]
Abstract
Magnetite nanoparticles supported on organically modified montmorillonite (MNP-OMMTs) were successfully synthesized by a facile coprecipitation method. The surface of natural clay was modified using a cationic surfactant, hexadecyltrimethylammonium. The synthesized MNP-OMMTs were used as an adsorbent to remove iodide from aqueous solutions. The maximum adsorption capacity of the adsorbent was 322.42mg/g, which is much higher than other previously reported adsorbents for removing iodide in aqueous solution. The experimental data were well fitted to a pseudo-second-order kinetic model, and the adsorption behavior followed the Langmuir isotherm. A thermodynamic study indicated that iodide adsorption was spontaneous and endothermic. The individual and combined effects of key process parameters (pH, temperature, and initial iodide concentration) were studied using a response surface methodology. The maximum iodide removal efficiency of 93.81% was obtained under the optimal conditions of pH3.9, a temperature of 41.3°C, and an initial iodide concentration of 113.8mg/L.
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Affiliation(s)
- Jiseon Jang
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
| | - Dae Sung Lee
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
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Jha P, Kana E, Schmidt S. Can artificial neural network and response surface methodology reliably predict hydrogen production and COD removal in an UASB bioreactor? INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2017; 42:18875-18883. [DOI: 10.1016/j.ijhydene.2017.06.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Wu Y, Wang C, Zheng M, Zuo J, Wu J, Wang K, Yang B. Effect of pH on ethanol-type acidogenic fermentation of fruit and vegetable waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 60:158-163. [PMID: 27707543 DOI: 10.1016/j.wasman.2016.09.033] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 09/19/2016] [Accepted: 09/26/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to investigate the possibility and optimal controlling strategy for ethanol-type acidogenic fermentation of fruit and vegetable waste by mixed microbial cultures. Four continuous stirred tank reactors (CSTR) were operated at various pHs (4.0, 5.0, 5.5, and 6.0) with an organic loading rate of 13gVS/(Ld) and hydraulic retention time of 3d. Butyrate-type fermentation was observed at pH 5.0, 5.5, and 6.0. Conversely, at pH 4.0, ethanol-type fermentation was observed with a high mass concentration and proportion (of total fermentative products) of ethanol, which were 6.7g/L and 88.8%, respectively. However, the total concentration of ethanol-type fermentative products substantially decreased from days 22-25. The optimal pH of ethanol-type fermentative microorganisms was investigated by using batch experiments with pH controlled at 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, and 7.0 and results showed that the maximum ethanol concentration and relatively highest acidogenic rate were found at pH of 5.5. The pH in the long term CSTR was changed from 4.0 to 5.5 to improve ethanol-type fermentation and results showed that ethanol-type fermentation was improved temporarily, however, was followed by the reappearance of butyrate-type fermentation. In addition, ethanol-type fermentation recovered once more when pH was reverted to 4.0. Therefore, the results of this study suggest that a process of dynamic, sequenced pH control with the order pH 4.0, 5.5 and 4.0 might be a feasible controlling strategy for continuous and stable ethanol-type fermentation.
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Affiliation(s)
- Yuanyuan Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Haidian District, Beijing 100084, China; Research and Development Center of Beijing Capital Co. Ltd, Chaoyang District, Beijing 100028, China
| | - Cuiping Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Haidian District, Beijing 100084, China
| | - Mingyue Zheng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Haidian District, Beijing 100084, China
| | - Jiane Zuo
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Haidian District, Beijing 100084, China
| | - Jing Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Haidian District, Beijing 100084, China
| | - Kaijun Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Haidian District, Beijing 100084, China.
| | - Boqiong Yang
- Economics and Management School, Beijing University of Agriculture, Changping District, Beijing 102206, China.
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12
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Modelling and Optimization of Operational Setpoint Parameters for Maximum Fermentative Biohydrogen Production Using Box-Behnken Design. FERMENTATION-BASEL 2016. [DOI: 10.3390/fermentation2030015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Reilly M, Dinsdale R, Guwy A. The impact of inocula carryover and inoculum dilution on the methane yields in batch methane potential tests. BIORESOURCE TECHNOLOGY 2016; 208:134-139. [PMID: 26938808 DOI: 10.1016/j.biortech.2016.02.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 02/12/2016] [Accepted: 02/17/2016] [Indexed: 06/05/2023]
Abstract
Batch studies are used to benchmark biohydrogen potential (BHP) and biomethane potential (BMP) yields from feed substrates, digestates residues and different process configurations. This study shows that BMP yields using cellulose can be biased positively by not diluting the initial sewage sludge inoculum and the bias is independent of starting inoculum volatile solids (VS) concentration. The carryover of BHP inoculum also increased the BMP yields when using cellulose as a substrate by up to 18.8%. Furthermore it was also observed that the dilution of BMP inoculum with deionised H2O reduced methane yields from cellulose by up to 132±26 N mL-CH4 g-VS(-1). Therefore it is proposed that inoculum and standard substrate controls (as used in this study) should be included in methane batch methodologies, particularly when using a pre-fermentation stage such as dark fermentation.
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Affiliation(s)
- Matthew Reilly
- Agricultural Centre for Sustainable Energy Systems (ACSES), Animal Production, Welfare and Veterinary Sciences, Harper Adams University, Newport, Shropshire TF10 8NB, United Kingdom.
| | - Richard Dinsdale
- Sustainable Environment Research Centre (SERC), Faculty of Computing, Engineering and Science, University Of South Wales, Upper Glyntaff, Pontypridd CF37 1BD, United Kingdom
| | - Alan Guwy
- Sustainable Environment Research Centre (SERC), Faculty of Computing, Engineering and Science, University Of South Wales, Upper Glyntaff, Pontypridd CF37 1BD, United Kingdom
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Hasan SDM, Giongo C, Fiorese ML, Gomes SD, Ferrari TC, Savoldi TE. Volatile fatty acids production from anaerobic treatment of cassava waste water: effect of temperature and alkalinity. ENVIRONMENTAL TECHNOLOGY 2015; 36:2637-2646. [PMID: 25885093 DOI: 10.1080/09593330.2015.1041426] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The production of volatile fatty acids (VFAs), intermediates in the anaerobic degradation process of organic matter from waste water, was evaluated in this work. A batch reactor was used to investigate the effect of temperature, and alkalinity in the production of VFAs, from the fermentation of industrial cassava waste water. Peak production of total volatile fatty acids (TVFAs) was observed in the first two days of acidogenesis. A central composite design was performed, and the highest yield (3400 mg L(-1) of TVFA) was obtained with 30°C and 3 g L(-1) of sodium bicarbonate. The peak of VFA was in 45 h (pH 5.9) with a predominance of acetic (63%) and butyric acid (22%), followed by propionic acid (12%). Decreases in amounts of cyanide (12.9%) and chemical oxygen demand (21.6%) were observed, in addition to the production of biogas (0.53 cm(3) h(-1)). The process was validated experimentally and 3400 g L(-1) of TVFA were obtained with a low relative standard deviation.
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Affiliation(s)
- Salah Din Mahmud Hasan
- a Center of Engineering and Exact Sciences , State University of Western of Paraná - Unioeste , Rua da Faculdade, 645, Toledo-PR 85903000 , Brazil
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15
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Jung KW, Hwang MJ, Cha MJ, Ahn KH. Application and optimization of electric field-assisted ultrasonication for disintegration of waste activated sludge using response surface methodology with a Box-Behnken design. ULTRASONICS SONOCHEMISTRY 2015; 22:437-445. [PMID: 25023828 DOI: 10.1016/j.ultsonch.2014.06.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 06/16/2014] [Accepted: 06/16/2014] [Indexed: 06/03/2023]
Abstract
In the present study, an electric field is applied in order to disintegrate waste activated sludge (WAS). As a preliminary step, feasibility tests are investigated using different applied voltages of 10-100V for 60min. As the applied voltage increases, the disintegration degrees (DD) are gradually enhanced, and thereby the soluble N, P, and carbohydrate concentrations increase simultaneously due to the WAS decomposition. Subsequently, an optimization process is conducted using a response surface methodology with a Box-Behnken design (BBD). The total solid concentration, applied voltage, and reaction time are selected as independent variables, while the DD is selected as the response variable. The overall results demonstrate that the BBD with an experimental design can be used effectively in the optimization of the electric field treatment of WAS. In the confirmation test, a DD of 10.26±0.14% is recorded, which corresponds to 99.1% of the predicted response value under the statistically optimized conditions. Finally, the statistic optimization of the combined treatment (electric field+ultrasonication) demonstrated that even though this method is limited to highly disintegrated WAS when it is applied individually, a high DD of 47.28±0.20% was recorded where the TS concentration was 6780mg/l, the strength of ultrasonication was 8.0W, the applied voltage was 68.4V, and the reaction time was 44min. E-SEM images clearly revealed that the application of the electric field is a significant alternative method for the combined treatment of WAS. This study was the first attempt to increase disintegration using the electric field for a combined treatment with ultrasonication.
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Affiliation(s)
- Kyung-Won Jung
- Center for Water Resources Cycle Research, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea.
| | - Min-Jin Hwang
- Center for Water Resources Cycle Research, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea
| | - Min-Jung Cha
- Center for Water Resources Cycle Research, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea
| | - Kyu-Hong Ahn
- Center for Water Resources Cycle Research, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea
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16
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Modeling and Optimization of Biohydrogen Production from De-oiled Jatropha Using the Response Surface Method. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2014. [DOI: 10.1007/s13369-014-1502-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Cappai G, De Gioannis G, Friargiu M, Massi E, Muntoni A, Polettini A, Pomi R, Spiga D. An experimental study on fermentative H₂ production from food waste as affected by pH. WASTE MANAGEMENT (NEW YORK, N.Y.) 2014; 34:1510-1519. [PMID: 24833177 DOI: 10.1016/j.wasman.2014.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 12/25/2013] [Accepted: 04/11/2014] [Indexed: 06/03/2023]
Abstract
Batch dark fermentation experiments were performed on food waste and mixtures of food waste and wastewater activated sludge to evaluate the influence of pH on biological H2 production and compare the process performance with and without inoculum addition. The effect of a preliminary thermal shock treatment of the inoculum was also investigated as a means to harvest the hydrogenogenic biomass. The best performance in terms of both H2 generation potential and process kinetics was observed at pH=6.5 under all experimental conditions (no inoculum, and untreated or thermally treated inoculum added). H2 production from food waste was found to be feasible even without inoculum addition, although thermal pre-treatment of the inoculum notably increased the maximum production and reduced the lag phase duration. The analysis of the fermentation products indicated that the biological hydrogen production could be mainly ascribed to a mixed acetate/butyrate-type fermentation. However, the presence of additional metabolites in the digestate, including propionate and ethanol, also indicated that other metabolic pathways were active during the process, reducing substrate conversion into hydrogen. The plateau in H2 generation was found to mirror the condition at which soluble carbohydrates were depleted. Beyond this condition, homoacetogenesis probably started to play a role in the degradation process.
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Affiliation(s)
- G Cappai
- University of Cagliari, DICAAR - Department of Civil and Environmental Engineering and Architecture, Cagliari, Italy; IGAG - CNR (Environmental Geology and Geoengineering Institute of the National Research Council), Italy
| | - G De Gioannis
- University of Cagliari, DICAAR - Department of Civil and Environmental Engineering and Architecture, Cagliari, Italy; IGAG - CNR (Environmental Geology and Geoengineering Institute of the National Research Council), Italy
| | - M Friargiu
- University of Cagliari, DICAAR - Department of Civil and Environmental Engineering and Architecture, Cagliari, Italy
| | - E Massi
- Department of Civil and Environmental Engineering, University of Rome "La Sapienza", Italy
| | - A Muntoni
- University of Cagliari, DICAAR - Department of Civil and Environmental Engineering and Architecture, Cagliari, Italy; IGAG - CNR (Environmental Geology and Geoengineering Institute of the National Research Council), Italy
| | - A Polettini
- Department of Civil and Environmental Engineering, University of Rome "La Sapienza", Italy
| | - R Pomi
- Department of Civil and Environmental Engineering, University of Rome "La Sapienza", Italy
| | - D Spiga
- University of Cagliari, DICAAR - Department of Civil and Environmental Engineering and Architecture, Cagliari, Italy
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18
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Mullai P, Yogeswari MK, Sridevi K. Optimisation and enhancement of biohydrogen production using nickel nanoparticles - a novel approach. BIORESOURCE TECHNOLOGY 2013; 141:212-9. [PMID: 23582220 DOI: 10.1016/j.biortech.2013.03.082] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 03/11/2013] [Accepted: 03/12/2013] [Indexed: 05/09/2023]
Abstract
The effect of initial glucose concentration, initial pH and nickel nanoparticles concentration on biohydrogen production was experimented at mesophilic temperature (30-35 °C) using anaerobic microflora in batch tests. It revealed that yield of biohydrogen using nickel nanoparticles with an average size of 13.64 nm was higher than the corresponding control tests. The optimisation of biohydrogen production was carried out by employing response surface methodology (RSM) with a central composite design (CCD). Results showed that the maximum cumulative biohydrogen production of 4400 mL and biohydrogen yield of 2.54 mol of hydrogen/mol of glucose was achieved at optimum conditions, initial glucose concentration of 14.01 g/L at initial pH of 5.61 and nickel nanoparticles concentration of 5.67 mg/L. The results demonstrated that linear and interactive effect of initial substrate concentration and nickel nanoparticles concentration was significant in optimisation of biohydrogen production. Nickel nanoparticles enhanced the biohydrogen production by 22.71%.
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Affiliation(s)
- P Mullai
- Pollution Control Research Laboratory, Department of Chemical Engineering, Faculty of Engineering and Technology, Annamalai University, Annamalai Nagar, 608 002 Tamil Nadu, India.
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19
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Bio-Hydrogen Production from Pineapple Waste Extract by Anaerobic Mixed Cultures. ENERGIES 2013. [DOI: 10.3390/en6042175] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Optimization of enzymatic hydrolysis of wool fibers for nanoparticles production using response surface methodology. ADV POWDER TECHNOL 2013. [DOI: 10.1016/j.apt.2012.09.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Rittmann S, Herwig C. A comprehensive and quantitative review of dark fermentative biohydrogen production. Microb Cell Fact 2012; 11:115. [PMID: 22925149 PMCID: PMC3443015 DOI: 10.1186/1475-2859-11-115] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 08/03/2012] [Indexed: 01/25/2023] Open
Abstract
Biohydrogen production (BHP) can be achieved by direct or indirect biophotolysis, photo-fermentation and dark fermentation, whereof only the latter does not require the input of light energy. Our motivation to compile this review was to quantify and comprehensively report strains and process performance of dark fermentative BHP. This review summarizes the work done on pure and defined co-culture dark fermentative BHP since the year 1901. Qualitative growth characteristics and quantitative normalized results of H2 production for more than 2000 conditions are presented in a normalized and therefore comparable format to the scientific community.Statistically based evidence shows that thermophilic strains comprise high substrate conversion efficiency, but mesophilic strains achieve high volumetric productivity. Moreover, microbes of Thermoanaerobacterales (Family III) have to be preferred when aiming to achieve high substrate conversion efficiency in comparison to the families Clostridiaceae and Enterobacteriaceae. The limited number of results available on dark fermentative BHP from fed-batch cultivations indicates the yet underestimated potential of this bioprocessing application. A Design of Experiments strategy should be preferred for efficient bioprocess development and optimization of BHP aiming at improving medium, cultivation conditions and revealing inhibitory effects. This will enable comparing and optimizing strains and processes independent of initial conditions and scale.
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Affiliation(s)
- Simon Rittmann
- Institute of Chemical Engineering, Research Area Biochemical Engineering, Gumpendorferstraße 1a, Vienna University of Technology, Vienna, 1060, Austria
| | - Christoph Herwig
- Institute of Chemical Engineering, Research Area Biochemical Engineering, Gumpendorferstraße 1a, Vienna University of Technology, Vienna, 1060, Austria
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22
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Yu L, Chen ZX, Tong X, Li K, Li WW. Anaerobic degradation of microcrystalline cellulose: kinetics and micro-scale structure evolution. CHEMOSPHERE 2012; 86:348-353. [PMID: 22094051 DOI: 10.1016/j.chemosphere.2011.09.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 09/25/2011] [Accepted: 09/26/2011] [Indexed: 05/31/2023]
Abstract
The degradation kinetics and micro-scale structure change of microcrystalline cellulose during anaerobic biodegradation were investigated. A modified Logistic model was established to properly describe the kinetics, which showed good fitness and wide applicability for cellulose degradation. A maximum degradation rate of 0.14 g L(-1) h(-1) was achieved after cultivating for 51.5 h. This result was in good agreement with the scanning electron microscope and X-ray diffraction analysis. Channels of 400-500 nm size started to occur on the crystalline surface of cellulose at around the inflexion time. Accordingly, the crystallinity significantly decreased at this point, indicating a degradation of the crystalline structure zones by anaerobic bacteria. This study offers direct morphological evidence and quantitative analysis of the biodegradation process of cellulose, and is beneficial to a better understanding of the cellulose degradation mechanism.
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Affiliation(s)
- Lei Yu
- Advanced Laboratory for Environmental Research and Technology, USTC-CityU Joint Advanced Research Centre, Suzhou 215123, China
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23
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Mudhoo A, Forster-Carneiro T, Sánchez A. Biohydrogen production and bioprocess enhancement: A review. Crit Rev Biotechnol 2010; 31:250-63. [DOI: 10.3109/07388551.2010.525497] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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24
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Ghosh D, Hallenbeck PC. Response surface methodology for process parameter optimization of hydrogen yield by the metabolically engineered strain Escherichia coli DJT135. BIORESOURCE TECHNOLOGY 2010; 101:1820-1825. [PMID: 19897361 DOI: 10.1016/j.biortech.2009.10.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2009] [Revised: 10/05/2009] [Accepted: 10/11/2009] [Indexed: 05/28/2023]
Abstract
Metabolically engineered microbial strains can be usefully employed to give higher yields, but this also requires development of a suitable bioprocess. Maximization of product yield during fermentation requires that a number of process parameters, some of which may interact, be optimized. Here we report the effects of different fermentative process conditions; pH, temperature and glucose concentration, on the molar hydrogen yield by a genetically optimized Escherichia coli strain, DJT135. In order to simultaneously reduce the number of the experiments, and to obtain the interactions between the variables important for achieving maximum hydrogen production, a 3(K) full factorial Box-Behnken design and response surface methodology (RSM) were employed for experimental design and analysis. A maximum molar hydrogen yield of 1.69 mol H(2)mol(-1) glucose was obtained under the optimal conditions of 75 mM glucose, 35 degrees C and pH 6.5. Thus, RSM with Box-Behnken design is a useful method for achieving higher molar hydrogen yields by metabolically engineered organisms.
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Affiliation(s)
- Dipankar Ghosh
- Département de Microbiologie et Immunologie, Université de Montréal, CP 6128 Succursale Centre-ville, Montréal, Québec, Canada
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25
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Cai J, Wang G, Li Y, Zhu D, Pan G. Enrichment and hydrogen production by marine anaerobic hydrogen-producing microflora. Sci Bull (Beijing) 2009. [DOI: 10.1007/s11434-009-0399-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Qi B, Chen X, Shen F, Su Y, Wan Y. Optimization of Enzymatic Hydrolysis of Wheat Straw Pretreated by Alkaline Peroxide Using Response Surface Methodology. Ind Eng Chem Res 2009. [DOI: 10.1021/ie8016863] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Benkun Qi
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China and Graduate School of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Xiangrong Chen
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China and Graduate School of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Fei Shen
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China and Graduate School of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Yi Su
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China and Graduate School of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Yinhua Wan
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China and Graduate School of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
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27
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Hallenbeck PC, Ghosh D. Advances in fermentative biohydrogen production: the way forward? Trends Biotechnol 2009; 27:287-97. [PMID: 19329204 DOI: 10.1016/j.tibtech.2009.02.004] [Citation(s) in RCA: 166] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2008] [Revised: 01/28/2009] [Accepted: 02/04/2009] [Indexed: 11/18/2022]
Abstract
A significant effort is underway to develop biofuels as replacements for non-renewable fossil fuels. Among the various options, hydrogen is an attractive future energy carrier due to its potentially higher efficiency of conversion to usable power, low generation of pollutants and high energy density. There are a variety of technologies for biological hydrogen production; here, we concentrate on fermentative hydrogen production and highlight some recently applied approaches, such as response surface methodology, different reactor configurations and organisms that have been used to maximize hydrogen production rates and yields. However, there are significant remaining barriers to practical application, such as low yields and production rates, and we discuss several methods, including two stage processes and metabolic engineering, that are aimed at overcoming these barriers.
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Affiliation(s)
- Patrick C Hallenbeck
- Département de Microbiologie et Immunologie, Université de Montréal, CP 6128 Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada.
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28
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Zheng G, Ren N, Wang A, Li W. Increase hydrogen production by mutant Ethanoligenens harbinense YR-3 in comparison with the wide-type parent strain. J Biotechnol 2008. [DOI: 10.1016/j.jbiotec.2008.07.638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Chen CY, Lu WB, Liu CH, Chang JS. Improved phototrophic H2 production with Rhodopseudomonas palustris WP3-5 using acetate and butyrate as dual carbon substrates. BIORESOURCE TECHNOLOGY 2008; 99:3609-16. [PMID: 17826982 DOI: 10.1016/j.biortech.2007.07.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2007] [Revised: 07/24/2007] [Accepted: 07/25/2007] [Indexed: 05/17/2023]
Abstract
An indigenous purple nonsulfur bacterium Rhodopseudomonas palustris WP3-5 was used to produce hydrogen phototrophically from acetate (HAc) and butyrate (HBu), which are the major soluble products from acidogenic dark fermentation. Statistical experimental design methodology was applied to identify optimal composition of the two carbon substrates in the medium, leading to better H2 production performance of R. palustris WP3-5. Three performance indexes were used to assess the effectiveness of the phototrophic H2 production; they were H2 yield (Y H2), maximum H2 production rate (Rmax) and maximum cumulative H2 evolution (Hmax). An overlay contour plot was used to determine the optimal concentration range of HAc and HBu, taking into account all three performance indexes (i.e., Rmax, Hmax, and Y H2) simultaneously. With the response surface analysis, R. palustris WP3-5 could produce H2 efficiently with the best Rmax, Hmax, and Y H2 of 39.5 ml/h, 2738 ml, and 51.6%, respectively. This performance is superior to most reported values in the literature, indicating that the statistical experimental design is an effective tool to improve phototrophic H2 production with R. palustris WP3-5.
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Affiliation(s)
- Chun-Yen Chen
- Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan
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30
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Pan CM, Fan YT, Xing Y, Hou HW, Zhang ML. Statistical optimization of process parameters on biohydrogen production from glucose by Clostridium sp. Fanp2. BIORESOURCE TECHNOLOGY 2008; 99:3146-54. [PMID: 17644378 DOI: 10.1016/j.biortech.2007.05.055] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2006] [Revised: 05/29/2007] [Accepted: 05/30/2007] [Indexed: 05/16/2023]
Abstract
Statistically based experimental designs were applied to optimizing process parameters for hydrogen production from glucose by Clostridium sp. Fanp2 which was isolated from effluent sludge of anaerobic hydrogen-producing bioreactor. The important factors influencing hydrogen production, which identified by initial screening method of Plackett-Burman, were glucose, phosphate buffer and vitamin solution. The path of steepest ascent was undertaken to approach the optimal region of the three significant factors. Box-Behnken design and response surface analysis were adopted to further investigate the mutual interaction between the variables and identify optimal values that bring maximum hydrogen production. Experimental results showed that glucose, vitamin solution and phosphate buffer concentration all had an individual significant influence on the specific hydrogen production potential (Ps). Simultaneously, glucose and vitamin solution, glucose and phosphate buffer were interdependent. The optimal conditions for the maximal Ps were: glucose 23.75 g/l, phosphate buffer 0.159 M and vitamin solution 13.3 ml/l. Using this statistical optimization method, the hydrogen production from glucose was increased from 2248.5 to 4165.9 ml H2/l.
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Affiliation(s)
- C M Pan
- Department of Chemistry, Zhengzhou University, Zhengzhou 450052, PR China
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31
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Jo JH, Lee DS, Park D, Choe WS, Park JM. Optimization of key process variables for enhanced hydrogen production by Enterobacter aerogenes using statistical methods. BIORESOURCE TECHNOLOGY 2008; 99:2061-6. [PMID: 17582761 DOI: 10.1016/j.biortech.2007.04.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2007] [Revised: 04/14/2007] [Accepted: 04/15/2007] [Indexed: 05/15/2023]
Abstract
The individual and mutual effects of glucose concentration, temperature and pH on the hydrogen production by Enterobacter aerogenes were investigated in a batch system. A Box-Behnken design and response surface methodology (RSM) were employed to determine the optimum condition for enhanced hydrogen production. The hydrogen production rate was investigated by simultaneously changing the three independent variables, which all had significant influences on the hydrogen production rate. The maximum hydrogen production rate of 425.8 ml H(2)(g dry cell h)(-1) was obtained under the optimum condition of glucose concentration 118.06 mM, temperature 38 degrees C and pH 6.13. The experimental results showed that the RSM with the Box-Behnken design was a useful tool for achieving high rate of hydrogen production by E. aerogenes.
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Affiliation(s)
- Ji Hye Jo
- Advanced Environmental Biotechnology Research Center, School of Environmental Science and Engineering, Pohang University of Science and Technology, Nam-Gu, Pohang, Gyeongbuk, South Korea
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32
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Mu Y, Yu HQ, Wang G. Evaluation of three methods for enriching H2-producing cultures from anaerobic sludge. Enzyme Microb Technol 2007. [DOI: 10.1016/j.enzmictec.2006.07.033] [Citation(s) in RCA: 122] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Mu Y, Yu HQ, Wang G. A kinetic approach to anaerobic hydrogen-producing process. WATER RESEARCH 2007; 41:1152-60. [PMID: 17267006 DOI: 10.1016/j.watres.2006.11.047] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2006] [Revised: 11/30/2006] [Accepted: 11/30/2006] [Indexed: 05/13/2023]
Abstract
Kinetics of hydrogen production from sucrose by mixed anaerobic cultures was investigated, and the Gompertz model was modified to describe the growth of hydrogen-producing microorganisms, consumption of substrate and formation of product in this work. A modified Gompertz model could adequately fit the experimental results. The effects of pH, temperature and the ratio of the initial substrate concentration to initial biomass concentration (S(0)/X(0)) on the maximum specific microbial growth rate (micro(m)) were evaluated using a response-surface methodology. Experimental results show that pH, temperature and S(0)/X(0) all had an influence on micro(m). The effect of pH and the second-order effect of pH and temperature were significant. A maximum micro(m) of 0.078 h(-1) was estimated under the optimum conditions of pH 5.5, temperature 34.6 degrees C and S(0)/X(0) of 4.3g/g-VSS. Modeling of microbial growth, substrate consumption and product formation was useful for optimizing the anaerobic hydrogen-producing process.
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Affiliation(s)
- Yang Mu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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34
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Wang J, Yu HQ. Biosynthesis of polyhydroxybutyrate (PHB) and extracellular polymeric substances (EPS) by Ralstonia eutropha ATCC 17699 in batch cultures. Appl Microbiol Biotechnol 2007; 75:871-8. [PMID: 17318537 DOI: 10.1007/s00253-007-0870-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2006] [Revised: 01/28/2007] [Accepted: 01/29/2007] [Indexed: 10/23/2022]
Abstract
The production of polyhydroxybutyrate (PHB) and extracellular polymeric substances (EPS) by Ralstonia eutropha ATCC 17699 at various glucose and (NH4)2SO4 concentrations in batch cultures were investigated. The biosynthesis of EPS by R. eutropha closely coupled with cell growth, while PHB was synthesized only under nitrogen-deficient and cell-growth-limited conditions. Experimental results show that the specific PHB production rate had an exponential correlation with both specific cell growth rate and EPS production rate. Furthermore, PHB was observed as the main storage of carbon and energy source by R. eutropha under nitrogen-limited conditions. In addition, experiments were conducted based on central composite design to optimize the batch culture for a high PHB yield. The PHB yield on glucose reached a maximum value of 0.34 g/g at glucose concentrations of 38.2 g/l and (NH4)2SO4 of 3.2 g/l.
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Affiliation(s)
- Jin Wang
- School of Chemistry, University of Science and Technology of China, Hefei 230026, China
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