| 1. |
- Gaur, V. K., et al.
(författare)
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Production of biosurfactants from agro-industrial waste and waste cooking oil in a circular bioeconomy : An overview
- 2022
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Ingår i: Bioresource Technology. - : Elsevier Ltd. - 0960-8524 .- 1873-2976. ; 343
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Forskningsöversikt (refereegranskat)abstract
- Waste generation is becoming a global concern owing to its adverse effects on environment and human health. The utilization of waste as a feedstock for production of value-added products has opened new avenues contributing to environmental sustainability. Microorganisms have been employed for production of biosurfactants as secondary metabolites by utilizing waste streams. Utilization of waste as a substrate significantly reduces the cost of overall process. Biosurfactant(s) derived from these processes can be utilized in environmental and different industrial sectors. This review focuses on global market of biosurfactants followed by discussion on production of biosurfactants from waste streams such as agro-industrial waste and waste cooking oil. The need for waste stream derived circular bioeconomy and scale up of biosurfactant production have been narrated with applications of biosurfactants in environment and industrial sectors. Road blocks and future directions for research have also been discussed. © 2021 Elsevier Ltd
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| 2. |
- Gaur, V K, et al.
(författare)
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Sustainable strategies for combating hydrocarbon pollution : Special emphasis on mobil oil bioremediation
- 2022
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Ingår i: Science of the Total Environment. - : Elsevier BV. - 0048-9697 .- 1879-1026. ; 832
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Tidskriftsartikel (refereegranskat)abstract
- The global rise in industrialization and vehicularization has led to the increasing trend in the use of different crude oil types. Among these mobil oil has major application in automobiles and different machines. The combustion of mobil oil renders a non-usable form that ultimately enters the environment thereby causing problems to environmental health. The aliphatic and aromatic hydrocarbon fraction of mobil oil has serious human and environmental health hazards. These components upon interaction with soil affect its fertility and microbial diversity. The recent advancement in the omics approach viz. metagenomics, metatranscriptomics and metaproteomics has led to increased efficiency for the use of microbial based remediation strategy. Additionally, the use of biosurfactants further aids in increasing the bioavailability and thus biodegradation of crude oil constituents. The combination of more than one approach could serve as an effective tool for efficient reduction of oil contamination from diverse ecosystems. To the best of our knowledge only a few publications on mobil oil have been published in the last decade. This systematic review could be extremely useful in designing a micro-bioremediation strategy for aquatic and terrestrial ecosystems contaminated with mobil oil or petroleum hydrocarbons that is both efficient and feasible. The state-of-art information and future research
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| 3. |
- Koul, Y, et al.
(författare)
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Microbial electrolysis : a promising approach for treatment and resource recovery from industrial wastewater
- 2022
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Ingår i: Bioengineered. - : Informa UK Limited. - 2165-5979 .- 2165-5987. ; 13:4, s. 8115-8134
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Tidskriftsartikel (refereegranskat)abstract
- Wastewater is one of the most common by-products of almost every industrial process. Treatment of wastewater alone, before disposal, necessitates an excess of energy. Environmental concerns over the use of fossil fuels as a source of energy have prompted a surge in demand for alternative energy sources and the development of sophisticated procedures to extract energy from unconventional sources. Treatment of municipal and industrial wastewater alone accounts for about 3% of global electricity use while the amount of energy embedded in the waste is at least 2-4 times greater than the energy required to treat the same effluent. The microbial electrolysis cell (MEC) is one of the most efficient technologies for waste-to-product conversion that uses electrochemically active bacteria to convert organic matter into hydrogen or a variety of by-products without polluting the environment. This paper highlights existing obstacles and future potential in the integration of Microbial Electrolysis Cell with other processes like anaerobic digestion coupled system, anaerobic membrane bioreactor and thermoelectric micro converter.
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| 4. |
- Brancoli, Pedro, 1989-, et al.
(författare)
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Changes in carbon footprint when integrating production of filamentous fungi in 1st generation ethanol plants
- 2017
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Ingår i: Bioresource Technology. - : Elsevier BV. - 0960-8524 .- 1873-2976.
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Tidskriftsartikel (refereegranskat)abstract
- Integrating the cultivation of edible filamentous fungi in the thin stillage from ethanol production is presently being considered. This integration can increase the ethanol yield while simultaneously producing a new value-added protein-rich biomass that can be used for animal feed. This study uses life cycle assessment to determine the change in greenhouse gas (GHG) emissions when integrating the cultivation of filamentous fungi in ethanol production. The result shows that the integration performs better than the current scenario when the fungal biomass is used as cattle feed for system expansion and when energy allocation is used. It performs worse if the biomass is used as fish feed. Hence, integrating the cultivation of filamentous fungi in 1st generation ethanol plants combined with proper use of the fungi can lead to a reduction of GHG emissions which, considering the number of existing ethanol plants, can have a significant global impact.
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| 5. |
- Brancoli, Pedro, 1989-, et al.
(författare)
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The use of life cycle assessment in the support of the development of fungal food products from surplus bread
- 2021
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Ingår i: Fermentation. - : MDPI. - 2311-5637. ; 7:3
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Tidskriftsartikel (refereegranskat)abstract
- The use of food waste as feedstock in the manufacture of high-value products is a promising avenue to contribute to circular economy. Considering that the majority of environmental impacts of products are determined in the early phases of product development, it is crucial to integrate life cycle assessment during these phases. This study integrates environmental considerations in the development of solid-state fermentation based on the cultivation of N. intermedia for the production of a fungal food product using surplus bread as a substrate. The product can be sold as a ready-to-eat meal to reduce waste while generating additional income. Four inoculation scenarios were proposed, based on the use of bread, molasses, and glucose as substrate, and one scenario based on backslopping. The environmental performance was assessed, and the quality of the fungal product was evaluated in terms of morphology and protein content. The protein content of the fungal food product was similar in all scenarios, varying from 25% to 29%. The scenario based on backslopping showed the lowest environmental impacts while maintaining high protein content. The results show that the inoculum production and the solid-state fermentation are the two environmental hotspots and should be in focus when optimizing the process. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
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| 6. |
- Ferreira, Jorge, et al.
(författare)
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A review of integration strategies of lignocelluloses and other wastes in 1st generation bioethanol processes
- 2018
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Ingår i: Process Biochemistry. - : Elsevier Ltd. - 1359-5113 .- 1873-3298. ; 75, s. 173-186
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Tidskriftsartikel (refereegranskat)abstract
- First-generation ethanol plants offer successful, commercial-scale bioprocesses that can, at least partially, replace fossil fuels. They can act as platforms to integrate lignocelluloses, wastes and residuals when establishing 2nd generation ethanol. The present review gathers recent insights on the integration of intrinsic and extrinsic substrates into lot generation ethanol plants, through microbial conversion or cogeneration systems. It shows that, among different lot generation ethanol plants, sugar-based ethanol by-products, dominate integration studies characterized by strong techno-economic and life-cycle assessment components. In comparison, there are fewer studies that focus on grain-derived lignocellulosic residuals and other wastes. There is consensus that integrating second generation feedstocks into first generation plants can have positive techno-economic and environmental impacts. In addition to realizing production of ethanol from 2nd generation feedstocks, these possibilities can impact waste management by establishing relevant biorefineries and circular economy. They can also supply a wide range of renewable products. Considering the potential of this waste management strategy, further research on these and many other substrates is needed. This will shed light on the effect of the integration, the relevant types of microorganisms and pretreatments, and of other physical parameters on the effectiveness of running lot generation plants with integrated second generation feedstocks.
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| 7. |
- Hellwig, Coralie, et al.
(författare)
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Aspects that Affect Tasting Studies of Emerging Food : A Review
- 2022
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Ingår i: Future Foods. - : Elsevier BV. - 2666-8335. ; 5
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Forskningsöversikt (refereegranskat)abstract
- Providing food security to the growing global population, and the resource depletion associated with current food systems, let to calls for more sustainable food sources. Food that can be produced in a sustainable way (taking all three aspects of sustainable development into consideration) is currently emerging in Western societies. Through tastings, insight can be gathered not only into sensory characteristics but also other aspects that aid innovation and development of food. The current study identified aspects that can affect tastings of emerging food by reviewing relevant literature. General aspects; meat alternatives; ingredients or processing technologies; information, prior knowledge and (un)familiarity; taste and liking; emotional factors; and willingness to engage with emerging food can affect tastings of emerging food. Awareness of the effect that these aspects can have on methodological considerations and results can be constructive in future research that use tastings as a platform to develop new and emerging food. The findings are significant for food science in terms of cornerstones towards potential industrial applications. These include innovating new types of food, assessing most effective technologies in the context of such food, developing new products, and understanding engagement with emerging food products.
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| 8. |
- Hellwig, Coralie, et al.
(författare)
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Household fermentation of leftover bread to nutritious food
- 2022
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Ingår i: Waste Management. - : Elsevier BV. - 0956-053X .- 1879-2456. ; 150, s. 39-47
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Tidskriftsartikel (refereegranskat)abstract
- Resource dependency of food production is aggravated when food is wasted. In Sweden, it is estimated that 37% of the total bread waste is generated at the household level. This work aimed to assess whether fermentation using edible filamentous fungi at households can provide a solution to valorize leftover bread in the production of fungi-based food for consumption. Bread was fermented in household and laboratory conditions with Neurospora intermedia and Rhizopus oligosporus. The results show that bread can be successfully and easily fermented at households, without signs of microbial contamination even though the conditions were not sterile. Fermentation at the household resulted in higher protein, fat and fiber content as well as greater starch reduction compared to the samples fermented under laboratory conditions. Household engagement in bread fermentation will likely depend on values that motivate reusing leftover bread. Perceived values that are expected to motivate engagement vary across individuals, but may include improved nutritional benefits, food waste prevention, convenience, responsibilities, and being part of sustainable societies and actions. © 2022 The Author(s)
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| 9. |
- Kundariya, Nidhi, et al.
(författare)
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A review on integrated approaches for municipal solid waste for environmental and economical relevance : Monitoring tools, technologies, and strategic innovations
- 2021
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Ingår i: Bioresource Technology. - : Elsevier BV. - 0960-8524 .- 1873-2976. ; 342
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Forskningsöversikt (refereegranskat)abstract
- Rapid population growth, combined with increased industrialization, has exacerbated the issue of solid waste management. Poor management of municipal solid waste (MSW) not only has detrimental environmental consequences but also puts public health at risk and introduces several other socioeconomic problems. Many developing countries are grappling with the problem of safe disposing of large amounts of produced municipal solid waste. Unmanaged municipal solid waste pollutes the environment, so its use as a potential renewable energy source would aid in meeting both increased energy needs and waste management. This review investigates emerging strategies and monitoring tools for municipal solid waste management. Waste monitoring using high-end technologies and energy recovery from MSW has been discussed. It comprehensively covers environmental and economic relevance of waste management technologies based on innovations achieved through the integration of approaches.
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| 10. |
- Mphahlele, R. C. J., et al.
(författare)
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Computational Studies of Binding Energies and Structures of Methylamine on Functionalized Activated Carbon Surfaces
- 2010
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Konferensbidrag (refereegranskat)abstract
- Empirical force fields and density functional theory (DFT) were used to study the binding energies and structures of methylamine on the surface of activated carbon (ACs). This is a first step in studying the adsorption of alkyl amines on the surface of functionalized ACs. The force fields used were Dreiding (DFF), Universal (UFF) and Compass (CFF) models. The generalized gradient approximation with Perdew Wang 91 (PW91) functional was used for DFT calculations. In addition to obtaining the amine-carboxylic acid adsorption energies, the results were used to establish reliability of the empirical models for these systems. CFF predicted a binding energy of (-9.227 kcal/mol) which agreed with PW91 at (-13.17 kcal/mol), compared to DFF (0 kcal/mol) and UFF (-0.72 kcal/mol). However, the CFF binding energies for the amine to ester and ketone disagreed with PW91 results. The structures obtained from all models agreed with PW91 results.
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