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Liu C, Li S, Niu H, Yang H, Tan J, Zhang J, Ren L, Yan B. Effect of Lipid Type on the Acidogenic Performance of Food Waste. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9040348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Abstract
Due to its high lipid content and intricate constitution, food waste poses a considerable challenge for biotreatment. This research aims to investigate the potential influence of diverse lipid species on anaerobic fermentation, induced by the varying dietary patterns observed in distinct regions. The investigation involved incorporating 5% (w/w) of beef tallow, mutton fat, soybean oil, peanut oil, and rapeseed oil, separately, into simulated food waste, and subjected it to batch mode acidogenic fermentation. The inclusion of unsaturated fatty acids resulted in a redirection of the metabolic pathway from the lactic acid type to the ethanol, acetic acid, and butyric acid types. The succession of the acidogenic metabolic pathway was highly correlated with the lipid types; beef tallow, mutton fat, soybean oil, and peanut oil delayed the metabolic process by 1, 2, 3, and 8 d, respectively, whereas rapeseed oil accelerated it by 2 d. The lipids contained within the food waste did not facilitate the buildup of soluble substances, resulting in a decrease of 14.0~59.7%. Notwithstanding, valeric acid was exclusively generated during the beef tallow and peanut oil treatments, whereas the production of lactic acid in peanut oil showed a 35.9% increase in comparison to the control.
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Affiliation(s)
- Chao Liu
- College of Environment & Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Sheng Li
- College of Environment & Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Hongyu Niu
- College of Environment & Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Haijun Yang
- College of Environment & Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Ju Tan
- Changsha Environmental Monitoring Center Station, Changsha 410001, China
| | - Jiachao Zhang
- College of Environment & Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Liheng Ren
- College of Environment & Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Binghua Yan
- College of Environment & Ecology, Hunan Agricultural University, Changsha 410128, China
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Annie Modestra J, Matsakas L, Rova U, Christakopoulos P. Prospects and trends in bioelectrochemical systems: Transitioning from CO 2 towards a low-carbon circular bioeconomy. BIORESOURCE TECHNOLOGY 2022; 364:128040. [PMID: 36182019 DOI: 10.1016/j.biortech.2022.128040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/22/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Resource scarcity and climate change are the most quested topics in view of environmental sustainability. CO2 sequestration through bioelectrochemical systems is an attractive option for fostering bioeconomy development upon several value-added products generation. This review details the state-of-the-art of bioelectrochemical systems for resource recovery from CO2 along with various biocatalysts capable of utilizing CO2. Two bioprocesses (photo-electrosynthesis and chemolithoelectrosynthesis) were discussed projecting their potential for biobased economy development from CO2. Significance of adopting circular strategies for efficient resource recycling, intensifying product value, integrations/interlinking of multiple process chains for the development of circular bioeconomy were discussed. Existing constrains as well as outlook for near establishment of circular bioeconomy from CO2 is presented by weighing fore-sighted plans with current actions. Need for developing CO2-based circular bioeconomy via innovative business models by analyzing social, technical, environmental and product related aspects are also discussed providing a roadmap of gaps to pursue for attaining practicality.
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Affiliation(s)
- J Annie Modestra
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental, and Natural Resources Engineering, Luleå University of Technology, 971‑87, Luleå, Sweden
| | - Leonidas Matsakas
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental, and Natural Resources Engineering, Luleå University of Technology, 971‑87, Luleå, Sweden.
| | - Ulrika Rova
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental, and Natural Resources Engineering, Luleå University of Technology, 971‑87, Luleå, Sweden
| | - Paul Christakopoulos
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental, and Natural Resources Engineering, Luleå University of Technology, 971‑87, Luleå, Sweden
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Kim S, Koo J. Recent advances in utilization of ferredoxins for biosynthesis of valuable compounds. World J Microbiol Biotechnol 2022; 38:178. [PMID: 35941298 DOI: 10.1007/s11274-022-03371-9] [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: 07/02/2022] [Accepted: 07/29/2022] [Indexed: 11/25/2022]
Abstract
Ferredoxin (Fd) is a small metalloprotein holding one or two Fe-S clusters in its inner shell. Like many other metalloproteins, Fd is redox active and involved in electron transfer during cellular metabolism. The electrons from reduced Fd are mostly used to regenerate NADPH under physiological conditions. Increasing number of attempts have been reported, however, where Fd delivers electrons to enable biosynthesis of valuable compounds. Various compounds ranging from H2 to vitamin D3 have been synthesized successfully using electrons mediated by Fd molecules. In this review, we provide an overview of the engineering studies utilizing Fd for biosynthesis of targeted molecules. The emphasis is on the role and activity of Fd as well as the methods used to improve the rate of electron transfer. Both microbial and electrochemical biosynthesis technologies are described and compared with respect to productivity and the compound being produced. In addition to the ferredoxins from the microbial organisms, artificially designed de novo types are described, highlighting the potential of the emerging computational methods used in metabolic and protein engineering. We believe that the recent advances in utilization of Fd for biosynthesis can result in breakthrough innovation across the biotechnology industry.
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Affiliation(s)
- Seongwon Kim
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Jamin Koo
- Department of Chemical Engineering, Hongik University, Seoul, 04066, Republic of Korea.
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Yadav M, Joshi C, Paritosh K, Thakur J, Pareek N, Masakapalli SK, Vivekanand V. Reprint of:Organic waste conversion through anaerobic digestion: A critical insight into the metabolic pathways and microbial interactions. Metab Eng 2022; 71:62-76. [DOI: 10.1016/j.ymben.2022.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 11/17/2021] [Accepted: 11/30/2021] [Indexed: 12/25/2022]
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Organic waste conversion through anaerobic digestion: A critical insight into the metabolic pathways and microbial interactions. Metab Eng 2021; 69:323-337. [PMID: 34864213 DOI: 10.1016/j.ymben.2021.11.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 11/17/2021] [Accepted: 11/30/2021] [Indexed: 11/23/2022]
Abstract
Anaerobic digestion is a promising method for energy recovery through conversion of organic waste to biogas and other industrial valuables. However, to tap the full potential of anaerobic digestion, deciphering the microbial metabolic pathway activities and their underlying bioenergetics is required. In addition, the behavior of organisms in consortia along with the analytical abilities to kinetically measure their metabolic interactions will allow rational optimization of the process. This review aims to explore the metabolic bottlenecks of the microbial communities adopting latest advances of profiling and 13C tracer-based analysis using state of the art analytical platforms (GC, GC-MS, LC-MS, NMR). The review summarizes the phases of anaerobic digestion, the role of microbial communities, key process parameters of significance, syntrophic microbial interactions and the bottlenecks that are critical for optimal bioenergetics and enhanced production of valuables. Considerations into the designing of efficient synthetic microbial communities as well as the latest advances in capturing their metabolic cross talk will be highlighted. The review further explores how the presence of additives and inhibiting factors affect the metabolic pathways. The critical insight into the reaction mechanism covered in this review may be helpful to optimize and upgrade the anaerobic digestion system.
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Fonseca RF, de Oliveira GHD, Zaiat M. Modeling anaerobic digestion metabolic pathways for antibiotic-contaminated wastewater treatment. Biodegradation 2020; 31:341-368. [PMID: 33040265 DOI: 10.1007/s10532-020-09914-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 09/18/2020] [Indexed: 11/26/2022]
Abstract
Anaerobic digestion has been used to treat antibiotic-contaminated wastewaters. However, it is not always effective, since biodegradation is the main removal mechanism and depends on the compound chemical characteristics and on how microbial metabolic pathways are affected by the reactor operational conditions and hydrodynamic characteristics. The aim of this study was to develop a mathematical model to describe 16 metabolic pathways of an anaerobic process treating sulfamethazine-contaminated wastewater. Contois kinetics and a useful reaction volume term were used to represent the biomass concentration impact on bed porosity in a N continuously stirred tank modeling approach. Two sulfamethazine removal hypotheses were evaluated: an apparent enzymatic reaction and a cometabolic degradation. Additionally, long-term modeling was developed to describe how the operational conditions affected the performance of the process. The best degradation correlations were associated with the consumption of carbohydrates, proteins and it was inversely related to acetic acid production during acidogenesis.
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Affiliation(s)
- Rafael Frederico Fonseca
- Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering (EESC), University of São Paulo (USP), Engenharia Ambiental - Bloco 4-F, Av. João Dagnone, 1100 - Santa Angelina, São Carlos, SP, 13.563-120, Brazil.
| | - Guilherme Henrique Duarte de Oliveira
- Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering (EESC), University of São Paulo (USP), Engenharia Ambiental - Bloco 4-F, Av. João Dagnone, 1100 - Santa Angelina, São Carlos, SP, 13.563-120, Brazil
| | - Marcelo Zaiat
- Biological Processes Laboratory, Center for Research, Development and Innovation in Environmental Engineering, São Carlos School of Engineering (EESC), University of São Paulo (USP), Engenharia Ambiental - Bloco 4-F, Av. João Dagnone, 1100 - Santa Angelina, São Carlos, SP, 13.563-120, Brazil
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Pankan AO, Yunus K, Fisher AC. Mechanistic evaluation of the exoelectrogenic activity of Rhodopseudomonas palustris under different nitrogen regimes. BIORESOURCE TECHNOLOGY 2020; 300:122637. [PMID: 31891855 DOI: 10.1016/j.biortech.2019.122637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/12/2019] [Accepted: 12/14/2019] [Indexed: 06/10/2023]
Abstract
The operation of bioelectrochemical systems (BESs) relies on the ability of microbes to export electrons outside of their cells. However, microorganisms are not evolutionary conceived to power BESs as most of the redox processes occur within. In this study, a low cost strategy equivalent to the one used to improve hydrogen production is employed to divert electrons from the metabolism to an electrode. Varying the ratio of nitrogen to carbon concentration (0, 0.20 and 0.54) determines what fraction of the electron flux is directed towards biosynthesis, biohydrogen generation and extracellular electron transfer. The ratio of 0.54 produced a higher specific growth rate while the ratio of 0.20 resulted in combined higher maximum specific hydrogen production and exoelectrogenic activity, translating into a maximum power density of 2.39 ± 0.13 mW m-2 in a novel hybrid hydrogen-photosynthetic microbial fuel cell. The current work sets a framework for the optimisation of R. palustris for bioenergy recovery.
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Affiliation(s)
- Aazraa O Pankan
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, United Kingdom
| | - Kamran Yunus
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, United Kingdom
| | - Adrian C Fisher
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, United Kingdom.
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Reddy CN, Kumar AN, Mohan SV. Metabolic phasing of anoxic-PDBR for high rate treatment of azo dye wastewater. JOURNAL OF HAZARDOUS MATERIALS 2018; 343:49-58. [PMID: 28941837 DOI: 10.1016/j.jhazmat.2017.08.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 07/18/2017] [Accepted: 08/23/2017] [Indexed: 06/07/2023]
Abstract
The treatment of azo dye wastewater was studied in a periodic discontinuous batch reactor (PDBR) at high loading condition (1250mg/l) under anoxic microenvironments. PDBR performance was evaluated by varying the time period of aerobic microenvironment during the cycle operation [before multiphasing (BMP; Control), 0.014; after multiphasing (AMP): AMPI, 0.84; AMPII, 0.73; AMPIII, 0.65]. Induction of air in anoxic-PDBR facilitated the simultaneous oxidation and reduction conditions and thus resulted higher dye removal efficiency with AMPIII strategy (65%) followed by AMPII (59.4%) and AMPI (54.4%) than the corresponding control operation (BMP: 49.4%). Relatively higher azo reductase enzyme activity was documented with AMP than corresponding BMP operation correlating well with azo dye decolorization. UV- UV-Significant transformational changes of azo dye peaks (618nm) were documented before and after multiphase operations. Cyclic voltammogram profiles depicted increment in redox catalytic currents during AMPIII operation and also supports the involvement of reducing equivalents towards the dye removal. Derivatives of voltammograms illustrated the involvement of various redox mediators viz., cytochrome-C, quinones, Fumarate/Succinate, Fe(CN)63-/Fe(CN)64-, and flavoproteins. Flexibility in phasing the multiple microenvironments in single bioreactor (PDBR) provides new insights in embodying the required capabilities to treat the recalcitrant azo dye wastewater especially at higher dye load operations.
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Affiliation(s)
- C Nagendranatha Reddy
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad-500 007, India; Bioengineering and Environmental Science Lab, EEFF Department, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad-500 007, India
| | - A Naresh Kumar
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad-500 007, India; Bioengineering and Environmental Science Lab, EEFF Department, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad-500 007, India
| | - S Venkata Mohan
- Bioengineering and Environmental Science Lab, EEFF Department, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad-500 007, India.
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Zhou M, Yan B, Wong JWC, Zhang Y. Enhanced volatile fatty acids production from anaerobic fermentation of food waste: A mini-review focusing on acidogenic metabolic pathways. BIORESOURCE TECHNOLOGY 2018; 248:68-78. [PMID: 28693950 DOI: 10.1016/j.biortech.2017.06.121] [Citation(s) in RCA: 253] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 06/21/2017] [Accepted: 06/22/2017] [Indexed: 05/11/2023]
Abstract
Recently, efficient disposal of food waste (FW) with potential resource recovery has attracted great attentions. Due to its easily biodegradable nature, rich nutrient availability and high moisture content, FW is regarded as favorable substrate for anaerobic digestion (AD). Both waste disposal and energy recovery can be fulfilled during AD of FW. Volatile fatty acids (VFAs) which are the products of the first-two stages of AD, are widely applied in chemical industry as platform chemicals recently. Concentration and distribution of VFAs is the result of acidogenic metabolic pathways, which can be affected by the micro-environment (e.g. pH) in the digester. Hence, the clear elucidation of the acidogenic metabolic pathways is essential for optimization of acidogenic process for efficient product recovery. This review summarizes major acidogenic metabolic pathways and regulating strategies for enhancing VFAs recovery during acidogenic fermentation of FW.
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Affiliation(s)
- Miaomiao Zhou
- Lab of Waste Valorization and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, PR China; University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, PR China
| | - Binghua Yan
- Lab of Waste Valorization and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, PR China.
| | - Jonathan W C Wong
- Sino-Forest Applied Research Centre for Pearl River Delta Environment, Department of Biology, Hong Kong Baptist University, PR China
| | - Yang Zhang
- Lab of Waste Valorization and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Laoshan District, Qingdao 266101, PR China
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Aguilar López R, Ruiz Camacho B, Neria-González MI, Rangel E, Santos O, López Pérez PA. State Estimation Based on Nonlinear Observer for Hydrogen Production in a Photocatalytic Anaerobic Bioreactor. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2017. [DOI: 10.1515/ijcre-2017-0004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Hydrogen concentration in a photocatalytic continuous bioreactor was estimated. For the above system, a novel kinetic model of the sulfate-reducing process for hydrogen production was proposed and experimentally confirmed. In addition, we present the design of an estimator based on nonlinear observer, which is robust against modeling errors, to estimate the observable states of the bioreactor. Sulfate, biomass, sulfide, carbon dioxide, cadmium in liquid, cadmium sulfide, and hydrogen concentrations were estimated in spite of errors in the evaluation of the parameters using sulfate concentration as measurable output. The convergence of the proposed observer was analyzed using Lyapunov stability theory. Finally, maximum hydrogen production was 225 mL and 175 mL for batch and continuous processes, respectively.
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