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Rousta, Kamran
Publications (10 of 11) Show all publications
Rousta, K. (2018). Household waste sorting at the source: A procedure for improvement. (Doctoral dissertation). Borås: Högskolan i Borås
Open this publication in new window or tab >>Household waste sorting at the source: A procedure for improvement
2018 (English)Doctoral thesis, monograph (Other academic)
Place, publisher, year, edition, pages
Borås: Högskolan i Borås, 2018
Series
Skrifter från Högskolan i Borås, ISSN 0280-381X ; 84
National Category
Other Engineering and Technologies
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-12821 (URN)978-91-88269-68-3 (ISBN)978-91-88269-69-0 (ISBN)
Available from: 2017-12-14 Created: 2017-10-09 Last updated: 2018-03-16Bibliographically 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)000393008300004 ()2-s2.0-85003839032 (Scopus ID)
Available from: 2017-01-09 Created: 2017-01-09 Last updated: 2018-11-30Bibliographically 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)000413730900002 ()2-s2.0-85032377879 (Scopus ID)
Available from: 2017-12-05 Created: 2017-12-05 Last updated: 2018-12-01Bibliographically 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
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
Rousta, K., Richards, T. & Taherzadeh, M. J. (2015). An Overview of Solid Waste Management toward Zero Landfill: A Swedish Model. In: Taherzadeh, Mohammad J Richards, Tobias (Ed.), Resource Recovery to Approach Zero Municipal Waste: . CRC Press
Open this publication in new window or tab >>An Overview of Solid Waste Management toward Zero Landfill: A Swedish Model
2015 (English)In: Resource Recovery to Approach Zero Municipal Waste / [ed] Taherzadeh, Mohammad J Richards, Tobias, CRC Press, 2015Chapter in book (Refereed)
Place, publisher, year, edition, pages
CRC Press, 2015
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-8717 (URN)9781482240351 (ISBN)
Available from: 2016-01-29 Created: 2016-01-29 Last updated: 2018-04-28Bibliographically approved
Rousta, K., Bolton, K., Lundin, M. & Dahlén, L. (2015). Quantitative assessment of distance to collection point and improved sorting information on source separation of household waste. Waste Management, 40(0), 22-30
Open this publication in new window or tab >>Quantitative assessment of distance to collection point and improved sorting information on source separation of household waste
2015 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 40, no 0, p. 22-30Article in journal (Refereed) Published
Abstract [en]

The present study measures the participation of households in a source separation scheme and, in particular, if the household’s application of the scheme improved after two interventions: (a) shorter distance to the drop-off point and (b) easy access to correct sorting information. The effect of these interventions was quantified and, as far as possible, isolated from other factors that can influence the recycling behaviour. The study was based on households located in an urban residential area in Sweden, where waste composition studies were performed before and after the interventions by manual sorting (pick analysis). Statistical analyses of the results indicated a significant decrease (28%) of packaging and newsprint in the residual waste after establishing a property close collection system (intervention (a)), as well as significant decrease (70%) of the miss-sorted fraction in bags intended for food waste after new information stickers were introduced (intervention (b)). Providing a property close collection system to collect more waste fractions as well as finding new communication channels for information about sorting can be used as tools to increase the source separation ratio. This contribution also highlights the need to evaluate the effects of different types of information and communication concerning sorting instructions in a property close collection system.

Keywords
Source separation, Household waste, Recycling behaviour, Information, Distance
National Category
Other Environmental Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-191 (URN)10.1016/j.wasman.2015.03.005 (DOI)000355049700005 ()25817721 (PubMedID)2-s2.0-84928704570 (Scopus ID)
Available from: 2015-06-08 Created: 2015-06-08 Last updated: 2018-12-01Bibliographically approved
Rousta, K. & Dahlén, L. (2015). Source Separation of Household Waste: Technology and Social Aspects. In: Mohammad Taherzadeh and Tobias Richards (Ed.), Resource Recovery to Approach Zero Municipal Waste: . Boca Raton: CRC Press
Open this publication in new window or tab >>Source Separation of Household Waste: Technology and Social Aspects
2015 (English)In: Resource Recovery to Approach Zero Municipal Waste / [ed] Mohammad Taherzadeh and Tobias Richards, Boca Raton: CRC Press, 2015Chapter in book (Refereed)
Abstract [en]

Ch 4. Separate collection, i.e. source separation, of recyclable materials is crucial for sustainable management of household waste. Functioning and efficient source separation schemes require consideration of the local circumstances and understanding of the influential of behavioural factors pertaining to householders. There are a number of different approaches and technical systems used for source separation. This chapter discusses the role of citizens and presents examples of comprehensive source separation systems. Some recommendations for establishing, monitoring and evaluating separate collection systems concludes the chapter.

Place, publisher, year, edition, pages
Boca Raton: CRC Press, 2015
Series
Green Chemistry and Chemical Engineering
Keywords
waste management, behaviour, sorting, recycling, collection, household waste, Other technology - Environmental engineering, Social sciences - Sociology
National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-8716 (URN)9781482240351 (ISBN)
Available from: 2016-01-29 Created: 2016-01-29 Last updated: 2019-02-15Bibliographically approved
Rousta, K. & Ekström, K. M. (2013). Assessing Incorrect Household Waste Sorting in a Medium-Sized Swedish City. Sustainability, 5(10), 4349-4361
Open this publication in new window or tab >>Assessing Incorrect Household Waste Sorting in a Medium-Sized Swedish City
2013 (English)In: Sustainability, ISSN 2071-1050, E-ISSN 2071-1050, Vol. 5, no 10, p. 4349-4361Article in journal (Refereed) Published
Abstract [en]

Source separation is a common method for dealing with the increasing problem of Municipal Solid Waste (MSW) in society. The citizens are then responsible for separating waste fractions produced in their home. If the consumers fail to sort the waste according to the source separation scheme, it will lead to an ineffective system. The purpose of this paper is to analyze the environmental, economic and social aspects of incorrect waste sorting in a medium sized Swedish city that has established a source separation system. In order to determine the extent to which citizens correctly sort their waste, food waste (black bags) and combustible fraction (white bags), were collected randomly from a residential area and categorized in different waste fractions. The results show that approximately 68 wt% of the waste in the white and 29 wt% in the black bags were not sorted correctly. This incorrect sorting accrues over 13 million SEK per year cost for this community. In order to improve the inhabitants’ participation in the waste management system, it is necessary to change different factors such as convenience and easy access to the recycling stations in the local MSW management systems as well as to review current regulation and policy.

Place, publisher, year, edition, pages
MDPI, 2013
Keywords
solid waste management; source separation; Sweden; recycling behavior, Environmental Science, source separation, recycling behavior, Sociala aspekter inom avfallshantering
National Category
Other Social Sciences
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-1607 (URN)10.3390/su5104349 (DOI)000328786600012 ()2320/12615 (Local ID)2320/12615 (Archive number)2320/12615 (OAI)
Available from: 2015-11-13 Created: 2015-11-13 Last updated: 2017-12-01Bibliographically approved
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