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Bolton, Kim
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Publications (10 of 94) Show all publications
Arja, M., Akbar Mirzaei, A., Mahmood Davarpanah, A., Masoud Barakati, S., Mohsenzadeh, A., Atashi, H. & Bolton, K. (2018). DFT studies of hydrocarbon combustion on metal surfaces. Journal of Molecular Modeling, 24, 47
Open this publication in new window or tab >>DFT studies of hydrocarbon combustion on metal surfaces
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2018 (English)In: Journal of Molecular Modeling, ISSN 1610-2940, E-ISSN 0948-5023, Vol. 24, p. 47-Article in journal (Refereed) Published
Keywords
Density functional theory, Hydrocarbon combustion, Brønsted-Evans-Polanyi relationship, Catalyst
National Category
Physical Chemistry
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-14302 (URN)
Available from: 2018-06-04 Created: 2018-06-04 Last updated: 2018-07-10Bibliographically approved
Brancoli, P., Ferreira, J. A., Bolton, K. & Taherzadeh, M. J. (2017). Changes in carbon footprint when integrating production of filamentous fungi in 1st generation ethanol plants. Bioresource Technology
Open this publication in new window or tab >>Changes in carbon footprint when integrating production of filamentous fungi in 1st generation ethanol plants
2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976Article in journal (Refereed) Published
Abstract [en]

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.

Keywords
Carbon footprint, Feed products, Life cycle assessment, Ethanol
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-13418 (URN)10.1016/j.biortech.2017.10.085 (DOI)
Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2018-09-05Bibliographically approved
Brancoli, P., Bolton, K. & Rousta, K. (2017). Life cycle assessment of supermarket food waste. Resources, Conservation and Recycling, 118, 39-46
Open this publication in new window or tab >>Life cycle assessment of supermarket food waste
2017 (English)In: Resources, Conservation and Recycling, ISSN 0921-3449, E-ISSN 1879-0658, Vol. 118, p. 39-46Article in journal (Refereed) Published
Abstract [en]

Retail is an important actor regarding waste throughout the entire food supply chain. Although it produces lower amounts of waste compared to other steps in the food value chain, such as households and agriculture, it has a significant influence on the supply chain, including both suppliers in the upstream processes and consumers in the downstream. The research presented in this contribution analyses the impacts of food waste at a supermarket in Sweden. In addition to shedding light on which waste fractions have the largest environmental impacts and what part of the waste life cycle is responsible for the majority of the impacts, the results provide information to support development of strategies and actions to reduce of the supermarket's environmental footprint. Therefore, the food waste was categorised and quantified over the period of one year, the environmental impacts of waste that were generated regularly and in large amounts were assessed, and alternative waste management practices were suggested. The research revealed the importance of not only measuring the food waste in terms of mass, but also in terms of environmental impacts and economic costs. The results show that meat and bread waste contributes the most to the environmental footprint of the supermarket. Since bread is a large fraction of the food waste for many Swedish supermarkets, this is a key item for actions aimed at reducing the environmental footprint of supermarkets. Separation of waste packaging from its food content at the source and the use of bread as animal feed were investigated as alternative waste treatment routes and the results show that both have the potential to lead to a reduction in the carbon footprint of the supermarket.

Keywords
Food waste, Life cycle assessment, Retail, Supermarket, Waste management
National Category
Other Environmental Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-11707 (URN)10.1016/j.resconrec.2016.11.024 (DOI)2-s2.0-85003839032 (Scopus ID)
Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2017-11-29Bibliographically approved
Rousta, K., Ordoñez, I., Bolton, K. & Dahlén, L. (2017). Support for designing waste sorting systems: A mini review. Waste Management & Research, 35(11), 1099-1111
Open this publication in new window or tab >>Support for designing waste sorting systems: A mini review
2017 (English)In: Waste Management & Research, ISSN 0734-242X, E-ISSN 1096-3669, Vol. 35, no 11, p. 1099-1111Article in journal (Refereed) Published
Abstract [en]

This article presents a mini review of research aimed at understanding material recovery from municipal solid waste. It focuses on two areas, waste sorting behaviour and collection systems, so that research on the link between these areas could be identified and evaluated. The main results presented and the methods used in the articles are categorised and appraised. The mini review reveals that most of the work that offered design guidelines for waste management systems was based on optimising technical aspects only. In contrast, most of the work that focused on user involvement did not consider developing the technical aspects of the system, but was limited to studies of user behaviour. The only clear consensus among the articles that link user involvement with the technical system is that convenient waste collection infrastructure is crucial for supporting source separation. This mini review reveals that even though the connection between sorting behaviour and technical infrastructure has been explored and described in some articles, there is still a gap when using this knowledge to design waste sorting systems. Future research in this field would benefit from being multidisciplinary and from using complementary methods, so that holistic solutions for material recirculation can be identified. It would be beneficial to actively involve users when developing sorting infrastructures, to be sure to provide a waste management system that will be properly used by them.

Place, publisher, year, edition, pages
SAGE Publications Ltd STM, 2017
Keywords
Source separation, household waste, recycling behaviour, resource recovery, sustainability, waste management, sorting infrastructure
National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-13040 (URN)10.1177/0734242X17726164 (DOI)
Available from: 2017-12-05 Created: 2017-12-05 Last updated: 2018-01-08Bibliographically approved
Souza Filho, P., Brancoli, P., Bolton, K., Zamani, A. & Taherzadeh, M. J. (2017). Techno-Economic and Life Cycle Assessment of Wastewater Management from Potato Starch Production: Present Status and Alternative Biotreatments. Fermentation, 3(4)
Open this publication in new window or tab >>Techno-Economic and Life Cycle Assessment of Wastewater Management from Potato Starch Production: Present Status and Alternative Biotreatments
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2017 (English)In: Fermentation, Vol. 3, no 4Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Multidisciplinary Digital Publishing Institute, 2017
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-13421 (URN)10.3390/fermentation3040056 (DOI)
Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2018-08-30Bibliographically approved
Erdtman, E., Bohlén, M., Ahlström, P., Gkourmpis, T., Berlin, M., Andersson, T. & Bolton, K. (2016). A molecular-level computational study of the diffusion and solubility of water and oxygen in carbonaceous polyethylene nanocomposites. Journal of Polymer Science Part B: Polymer Physics, 54, 589-602
Open this publication in new window or tab >>A molecular-level computational study of the diffusion and solubility of water and oxygen in carbonaceous polyethylene nanocomposites
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2016 (English)In: Journal of Polymer Science Part B: Polymer Physics, ISSN 0887-6266, E-ISSN 1099-0488, Vol. 54, p. 589-602Article in journal (Refereed) Published
Abstract [en]

Monte Carlo and molecular dynamics simulations were performed to investigate the effect on the solubility, diffusion, and permeability of water and oxygen when adding graphene or single-walled carbon nanotubes (SWCNTs) to polyethylene (PE). When compared with pure PE, addition of graphene lowered the solubility of water, whereas at lower temperatures, the oxygen solubility increased because of the oxygen–graphene interaction. Addition of SWCNTs lowered the solubility of both water and oxygen when compared with pure PE. A detailed analysis showed that an ordered structure of PE is induced near the additive surface, which leads to a decrease in the diffusion coefficient of both penetrants in this region. The addition of graphene does not change the permeation coefficient of oxygen (in the direction parallel to the filler) and, in fact, may even increase this coefficient when compared with pure PE. In contrast, the water permeability is decreased when graphene is added to PE. The addition of SWCNTs decreases the permeability of both penetrants. Graphene can consequently be added to selectively increase the solubility and permeation of oxygen over water, at least at lower temperatures. 

Keywords
diffusion, molecular modeling, nanocomposites, polyethylene (PE), solubility
National Category
Polymer Chemistry
Research subject
Textiles and Fashion (General)
Identifiers
urn:nbn:se:hb:diva-10816 (URN)10.1002/polb.23951 (DOI)000368942900007 ()2-s2.0-84956976939 (Scopus ID)
Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-30Bibliographically approved
Rousta, K., Bolton, K. & Dahlén, L. (2016). A Procedure to Transform Recycling Behavior for Source Separation of Household Waste. Recycling, 1(1), 147-165
Open this publication in new window or tab >>A Procedure to Transform Recycling Behavior for Source Separation of Household Waste
2016 (English)In: Recycling, ISSN 2072-4292, Vol. 1, no 1, p. 147-165Article in journal (Refereed) Published
Abstract [en]

Household waste separation at the source is a central part of waste management systems in Sweden. Resource recovery of materials and energy increased substantially after separate collection was implemented in the 1990s. A procedure to transform recycling behavior for the sorting of household waste—called the recycling behavior transition (RBT) procedure—was designed and implemented in a waste management system in Sweden. Repeated use of this procedure, which will assist in the continual improvement of household sorting, consists of the following four consecutive steps: (i) evaluating the current sorting behavior; (ii) identifying appropriate interventions; (iii) implementing the interventions, and; (iv) assessing the quantitative effect of the interventions. This procedure follows action research methodology and it is the first time that such a procedure has been developed and implemented for the sorting of household waste. The procedure can easily be adapted to any source separation system (which may have different local situations) and, by improving the source separation, will increase the resource recovery in the waste management system. The RBT procedure, together with its strengths and weaknesses, is discussed in this paper, and its implementation is exemplified by a pilot study done in Sweden.

Keywords
recycling behavior, resource recovery, source separation, household waste
National Category
Environmental Sciences
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-9768 (URN)10.3390/recycling1010147 (DOI)
Available from: 2016-04-17 Created: 2016-04-17 Last updated: 2017-12-15Bibliographically approved
Mohsenzadeh, A., Richards, T. & Bolton, K. (2016). DFT study of the water gas shift reaction on Ni (111), Ni (100) and Ni (110) surfaces. Surface Science, 644, 53-63
Open this publication in new window or tab >>DFT study of the water gas shift reaction on Ni (111), Ni (100) and Ni (110) surfaces
2016 (English)In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 644, p. 53-63Article in journal (Refereed) Published
Abstract [en]

Density functional theory (DFT) calculations were used to study the water gas shift (WGS) reaction on Ni(111), Ni(100) and Ni(110) surfaces. The adsorption energy for ten species involved in thereaction together with activation barriers and reaction energies for the nine most important elementary steps were determined using the same model and DFT methods. The results reveal that these energies are sensitive to the surface structure. In spite of this, the WGS reaction occurs mainly via the direct (also referred to as redox) pathway with the CO + O → CO2 reaction as the rate determining step on all three surfaces. The activation barrier obtained for this rate limiting step decreases in the order Ni(110) > Ni(111) > Ni(100). Therefore, if O species are present on the surfaces then the WGSreaction is fastest on the Ni(100) surface. However, the barrier for desorption of H2O (which is the source of the O species) is lower than its dissociation reaction on the Ni(111) and Ni(100) surfaces, but not on the Ni(110) surface. Hence, at low H2O(g) pressures, the direct pathway on the Ni(110) surface will dominate and will be the rate limiting step. The calculations also show that the reason that the WGS reaction does not primarily occur via the formate pathway is that this species is a stable intermediate on all surfaces. The reactions studied here support the Brønsted-Evans-Polanyi (BEP) principles with an R2 value of 0.99. © 2015 Elsevier B.V. All rights reserved.

Keywords
DFT, Ni(100), Ni(110), Ni(111), Nickel, Water gas shift reaction
National Category
Other Chemical Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-10790 (URN)10.1016/j.susc.2015.09.014 (DOI)000367489000009 ()2-s2.0-84943566189 (Scopus ID)
Available from: 2016-09-28 Created: 2016-09-28 Last updated: 2017-12-15Bibliographically approved
Brancoli, P., Rousta, K. & Bolton, K. (2016). Environmental impacts of supermarket food waste in a life cycle perspective. In: : . Paper presented at 10th International Conference on Life Cycle Assessment of Food, Dublin, October 19–21, 2016.
Open this publication in new window or tab >>Environmental impacts of supermarket food waste in a life cycle perspective
2016 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Other Environmental Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-11710 (URN)
Conference
10th International Conference on Life Cycle Assessment of Food, Dublin, October 19–21, 2016
Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2017-01-09Bibliographically approved
Brancoli, P., Bolton, K. & Rousta, K. (2016). LCA as a Supporting Tool for Supermarket Food Waste Management. In: : . Paper presented at Life Cycle Assessment and Other Assessment Tools for Waste Management and Resource Optimization, Cetraro, June 5-10, 2016.
Open this publication in new window or tab >>LCA as a Supporting Tool for Supermarket Food Waste Management
2016 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Other Environmental Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-11712 (URN)
Conference
Life Cycle Assessment and Other Assessment Tools for Waste Management and Resource Optimization, Cetraro, June 5-10, 2016
Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2017-01-09Bibliographically approved
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