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Application of an efficient, cost-effective and newly developed single-process SAO/PND technology for treating brewery industry effluent. SOUTH AFRICAN JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1016/j.sajce.2022.04.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Gunawan D, Toe CY, Kumar P, Scott J, Amal R. Synergistic Cyanamide Functionalization and Charge-Induced Activation of Nickel/Carbon Nitride for Enhanced Selective Photoreforming of Ethanol. ACS APPLIED MATERIALS & INTERFACES 2021; 13:49916-49926. [PMID: 34652901 DOI: 10.1021/acsami.1c14195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photoreforming is a promising alternative to water splitting for H2 generation due to the favorable organic oxidation half-reaction and the potential to simultaneously produce solar fuel and value-added chemicals. Recently, carbon nitride has received significant attention as an inexpensive photocatalyst for the photoreforming process. However, the application of carbon nitride continues to be hampered by its poor photocatalytic performance. Herein, we report for the first time a synergistic modification of an in situ photodeposited Ni cocatalyst on carbon nitride via cyanamide functionalization and solid/liquid interfacial charge-induced activation using excess Ni2+ ions. Synergism between the cyanamide functionalization and charge-induced activation by the excess Ni2+ ions invokes enhanced activity, selectivity, and stability during ethanol photoreforming. A H2 evolution rate of 2.32 mmol h-1 g-1 in conjunction with an acetaldehyde production rate of 2.54 mmol h-1 g-1 was attained for the Ni/NCN-CN. The H2 evolution rate and elevated acetaldehyde selectivity (above 98%) remained consistent under prolonged light illumination. To understand the origin of the complementary promotional effects, the contributions of cyanamide groups and excess Ni2+ ions to selective ethanol photoreforming are decoupled and systematically investigated. The cyanamide functionality on carbon nitride was found to promote hole scavenging for the ethanol oxidation reaction, thereby enabling effective electron transfer to the Ni cocatalyst for H2 evolution. Concomitantly, excess Ni2+ ions remaining in solution created a positively charged environment on the photocatalyst surface, which improved charge carrier utilization and ethanol adsorption. The work highlights the importance of both carbon nitride functionality and charge on the photocatalyst surface in developing a selective photocatalytic reforming system.
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Affiliation(s)
- Denny Gunawan
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Cui Ying Toe
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Priyank Kumar
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Jason Scott
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Rose Amal
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia
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Chai A, Wong YS, Ong SA, Aminah Lutpi N, Sam ST, Kee WC, Ng HH. Haldane-Andrews substrate inhibition kinetics for pilot scale thermophilic anaerobic degradation of sugarcane vinasse. BIORESOURCE TECHNOLOGY 2021; 336:125319. [PMID: 34049168 DOI: 10.1016/j.biortech.2021.125319] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 05/25/2023]
Abstract
A pilot scale anaerobic degradation of sugarcane vinasse was carried out at various hydraulic retention time (HRT) in the Anaerobic Suspended Growth Closed Bioreactor (ASGCB) under thermophilic temperature. The performance and kinetics were evaluated through the Haldane-Andrews model to investigate the substrate inhibition potential of sugarcane vinasse. All parameters show great performance between HRT 35 and 25 days: chemical oxygen demand (COD) reduction efficiency (81.6 to 86.8%), volatile fatty acids (VFA) reduction efficiency (92.4 to 98.5%), maximum methane yield (70%) and maximum biogas production (19.35 L/day). Furthermore, steady state values from various HRT were obtained in the kinetic evaluation for: rXmax (1.20 /day), Ks (19.95 gCOD/L), Ki (7.00 gCOD/L) and [Formula: see text] (0.33 LCH4/gCOD reduction). This study shows that anaerobic degradation of sugarcane vinasse through ASGCB could perform well at high HRT and provides a low degree of substrate inhibition as compared to existing studies from literature.
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Affiliation(s)
- Audrey Chai
- Faculty of Civil Engineering Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
| | - Yee-Shian Wong
- Faculty of Civil Engineering Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia; Water Research and Environmental Sustainability Growth, Centre of Excellence (WAREG), Universiti Malaysia Perlis (UniMAP), Perlis, Malaysia.
| | - Soon-An Ong
- Faculty of Civil Engineering Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia; Water Research and Environmental Sustainability Growth, Centre of Excellence (WAREG), Universiti Malaysia Perlis (UniMAP), Perlis, Malaysia
| | - Nabilah Aminah Lutpi
- Faculty of Civil Engineering Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia; Water Research and Environmental Sustainability Growth, Centre of Excellence (WAREG), Universiti Malaysia Perlis (UniMAP), Perlis, Malaysia
| | - Sung-Ting Sam
- Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
| | - Wei-Chin Kee
- Faculty of Civil Engineering Technology, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia
| | - Hock-Hoo Ng
- Fermpro Sdn Bhd, Lot 2 Kawasan Perindustrian Chuping, 02450 Kangar, Perlis, Malaysia
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Optimising Brewery-Wastewater-Supported Acid Mine Drainage Treatment vis-à-vis Response Surface Methodology and Artificial Neural Network. Processes (Basel) 2020. [DOI: 10.3390/pr8111485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This study investigated the use of brewing wastewater (BW) as the primary carbon source in the Postgate medium for the optimisation of sulphate reduction in acid mine drainage (AMD). The results showed that the sulphate-reducing bacteria (SRB) consortium was able to utilise BW for sulphate reduction. The response surface methodology (RSM)/Box–Behnken design optimum conditions found for sulphate reduction were a pH of 6.99, COD/SO42− of 2.87, and BW concentration of 200.24 mg/L with predicted sulphate reduction of 91.58%. Furthermore, by using an artificial neural network (ANN), a multilayer full feedforward (MFFF) connection with an incremental backpropagation network and hyperbolic tangent as the transfer function gave the best predictive model for sulphate reduction. The ANN optimum conditions were a pH of 6.99, COD/SO42− of 0.50, and BW concentration of 200.31 mg/L with predicted sulphate reduction of 89.56%. The coefficient of determination (R2) and absolute average deviation (AAD) were estimated as 0.97 and 0.046, respectively, for RSM and 0.99 and 0.011, respectively, for ANN. Consequently, ANN was a better predictor than RSM. This study revealed that the exclusive use of BW without supplementation with refined carbon sources in the Postgate medium is feasible and could ensure the economic sustainability of biological sulphate reduction in the South African environment, or in any semi-arid country with significant brewing activity and AMD challenges.
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Rodríguez-Romero JDJ, Aceves-Lara CA, Silva CF, Gschaedler A, Amaya-Delgado L, Arrizon J. 2-Phenylethanol and 2-phenylethylacetate production by nonconventional yeasts using tequila vinasses as a substrate. ACTA ACUST UNITED AC 2020; 25:e00420. [PMID: 32025510 PMCID: PMC6997672 DOI: 10.1016/j.btre.2020.e00420] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 01/04/2020] [Accepted: 01/04/2020] [Indexed: 12/14/2022]
Abstract
Yeast species influenced the de novo synthesis of 2-phenylethylacetate. Inhibitory compounds showed a strong influence on cell growth and 2-phenylethylacetate production for the evaluated yeasts. More than a 50 % reduction in the chemical and biochemical oxygen demand was achieved by yeast fermentation.
Vinasses from the tequila industry are wastewaters with highly elevated organic loads. Therefore, to obtain value-added products by yeast fermentations, such as 2-phenylethanol (2-PE) and 2-phenylethylacetate (2-PEA), could be interesting for industrial applications from tequila vinasses. In this study, four yeasts species (Wickerhamomyces anomalus, Candida glabrata, Candida utilis, and Candida parapsilosis) were evaluated with two different chemically defined media and tequila vinasses. Differences in the aroma compounds production were observed depending on the medium and yeast species used. In tequila vinasses, the highest concentration (65 mg/L) of 2-PEA was reached by C. glabrata, the inhibitory compounds decreased biomass production and synthesis of 2-PEA, and biochemical and chemical oxygen demands were reduced by more than 50 %. Tequila vinasses were suitable for the production of 2-phenylethylacetate by the shikimate pathway. A metabolic network was developed to obtain a guideline to improve 2-PE and 2-PEA production using flux balance analysis (FBA).
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Affiliation(s)
- José de Jesús Rodríguez-Romero
- Industrial Biotechnology Department, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C., Jalisco, Mexico
| | - César Arturo Aceves-Lara
- TBI, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France.,TBI (ex.LISBP)-INSA, Toulouse 135 Avenue de Rangueil, 31077, Toulouse, France
| | - Cristina Ferreira Silva
- Department of Biology, Federal University of Lavras, Postal Code 3037, 37200-000, Lavras, MG, Brazil
| | - Anne Gschaedler
- Industrial Biotechnology Department, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C., Jalisco, Mexico
| | - Lorena Amaya-Delgado
- Industrial Biotechnology Department, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C., Jalisco, Mexico
| | - Javier Arrizon
- Industrial Biotechnology Department, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C., Jalisco, Mexico
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Fungi-based treatment of real brewery waste streams and its effects on water quality. Bioprocess Biosyst Eng 2019; 42:1317-1324. [PMID: 31025175 PMCID: PMC6647373 DOI: 10.1007/s00449-019-02130-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 04/12/2019] [Indexed: 12/21/2022]
Abstract
Nutrient-rich liquid waste streams generated during the beer brewing were treated by submerged fungal growth. Among five filamentous fungal strains tested, Pleurotus ostreatus and Trichoderma harzianum were selected for treatment of run-off from spent grain and hot trub, respectively. In both waste streams, nitrogen was well removed by fungal treatment, with a maximum reduction of 91.5 ± 0.5% of total nitrogen in run-off from spent grain treated with P. ostreatus and 77.0 ± 3.1% in hot trub treated with T. harzianum. Removal of phosphorus was considerably lower, with maximum removal of total phosphorus of 30.8 ± 11.1% for the P. ostreatus treatment and 16.6 ± 7.8% for the T. harzianum treatment. Considering the high concentration of phosphorus in the waste sources (320–600 mg L−1), additional techniques for its removal are needed. In the P. ostreatus treatment, a total amount of 13.2 ± 2.2 g L−1 dwt of biomass with a protein concentration of 11.6 ± 2.1% was produced.
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Hultberg M, Bodin H. Fungi-based treatment of brewery wastewater-biomass production and nutrient reduction. Appl Microbiol Biotechnol 2017; 101:4791-4798. [PMID: 28213731 PMCID: PMC5442259 DOI: 10.1007/s00253-017-8185-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 01/29/2017] [Accepted: 02/07/2017] [Indexed: 11/23/2022]
Abstract
The beer-brewing process produces high amounts of nutrient-rich wastewater, and the increasing number of microbreweries worldwide has created a need for innovative solutions to deal with this waste. In the present study, fungal biomass production and the removal of organic carbon, phosphorus and nitrogen from synthetic brewery wastewater were studied. Different filamentous fungi with a record of safe use were screened for growth, and Trametes versicolor, Pleurotus ostreatus and Trichoderma harzianum were selected for further work. The highest biomass production, 1.78 ± 0.31 g L−1 of dry weight, was observed when P. ostreatus was used for the treatment, while T. harzianum demonstrated the best capability for removing nutrients. The maximum reduction of chemical oxygen demand, 89% of the initial value, was observed with this species. In the removal of total nitrogen and phosphorus, no significant difference was observed between the species, while removal of ammonium varied between the strains. The maximum reduction of ammonium, 66.1% of the initial value, was also found in the T. harzianum treatment. It can be concluded that all treatments provided significant reductions in all water-quality parameters after 3 days of growth and that the utilisation of filamentous fungi to treat brewery wastewater, linked to a deliberate strategy to use the biomass produced, has future potential in a bio-based society.
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Affiliation(s)
- M Hultberg
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, P.O. Box 103, SE 230 53, Alnarp, Sweden.
| | - H Bodin
- Division of Natural Sciences, Kristianstad University, Kristianstad, Sweden
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Comelli RN, Seluy LG, Grossmann IE, Isla MA. Treatment of High-Strength Wastewater from the Sugar-Sweetened Beverage Industry by an Alcoholic Fermentation Process. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b00591] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Raúl N. Comelli
- Departamento
de Medio Ambiente de la Facultad de Ingeniería y Ciencias Hídricas
(FICH), Universidad Nacional del Litoral y Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ciudad Universitaria
CC 242 Paraje El Pozo, 3000 Santa Fe, Argentina
| | - Lisandro G. Seluy
- Departamento
de Medio Ambiente de la Facultad de Ingeniería y Ciencias Hídricas
(FICH), Universidad Nacional del Litoral y Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ciudad Universitaria
CC 242 Paraje El Pozo, 3000 Santa Fe, Argentina
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC), General Güemes
3450, 3000 Santa
Fe, Argentina
| | - Ignacio E. Grossmann
- Chemical
Engineering Department, Carnegie Mellon University, 5000 Forbes
Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Miguel A. Isla
- Departamento
de Medio Ambiente de la Facultad de Ingeniería y Ciencias Hídricas
(FICH), Universidad Nacional del Litoral y Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Ciudad Universitaria
CC 242 Paraje El Pozo, 3000 Santa Fe, Argentina
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC), General Güemes
3450, 3000 Santa
Fe, Argentina
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