Koiwanit, Jarotwan
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Preferred name
Koiwanit, Jarotwan
Alternative Name
Koiwanit, J.
Main Affiliation
Email
jarotwan.ko@kmitl.ac.th
27 results
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Item type:Publication, A Comparative Assessment of Life-Cycle Greenhouse Gas Emissions from Hypothetical Electric Airport Transportation Services in Thailand(2018-05-22)Global warming is an increase of average temperature in the atmosphere, which causes adverse effects on the environment. Carbon dioxide (CO<inf>2</inf>) from transportation sector is one of the main contributors of the overall greenhouse gases (GHG). To cope with this issue, electric car services are increasingly seen as popular alternative modes of green transportation especially for urban cities as it is more flexible, more environmentally-friendly, and less expensive than the use of conventional vehicles. The study analyses and compare the hypothetical electric car systems from airport transportation services. Center of Environmental Science of Leiden University (CML) 2001, the Life Cycle Impact Assessment (LCIA) method, is applied to convert life cycle inventory data into environmental impacts. The observed results showed that the electric shuttle bus had the highest impact in global warming potential (GWP) compared to other transportation types. Alternatively, this Life Cycle Assessment (LCA) study that evaluated different transportations provided important information for decision makers on quantifying the differences between each scenario. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Energy efficiency and environmental impact analysis in grocery store market in Canada(2018-01-01)There is growing pressure to limit Global Warming Potential (GWP) as it is the most significant way to reduce serious threats to people. The increase of average temperature in the atmosphere causes adverse effects on the environment, and this is changing the way business operates. Together with undergoing changes to be more environmentally friendly, the majority of business sectors has been launching many projects to reduce environmental impacts. Similar to grocery sector in Canada, many companies have been reported to investigate the environmental performance. Loblaw Companies Limited, the largest food distributors in Canada, has put more concerns on environmental impacts and worked diligently to reduce greenhouse gas (GHG) emissions through actions such as improving energy efficiency reducing refrigerant leaks, and incorporating renewable energy sources. This study analyzed Loblaw's energy efficiency and environmental performance and provided suggestions in the applications of skylight improvement, geothermal, refrigeration systems, kinetic energy to electricity, and e-grocery shopping. The results showed that the environmental concerns were substantially decreased. However, types of lights and refrigerators, distance driven, vehicle types, fuel used in e-grocery shopping results in the different amount of emissions; consequently, the GHG emissions varied depending on these factors. By integrating more environmentally technology, Loblaw could further reduce their emissions and waste and become a more sustainable company. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Greenhouse gas emissions comparison of solid waste transportation system: A case study in Thailand(2020-01-27); Hamontree, C.During the early periods of civilization, solid waste was conveniently collected transported and disposed because of the low number of population. However, waste generation is expected to increase becasue of rapid population growth and consequently shows an increase in solid waste collection, transportation, and disposal. Waste transportation planning is a difficult task due to the issues of the increasing numbers of garbage vehicles and the fluctuation of fuel prices as well as the cost-effectiveness and health and environmental impacts. An unsustainable waste collection and transportation is heading towards a variety of indirect human health impacts. Accordingly, the vehicle routing problem (VRP) plays a significant role in the field of waste collection and transportation system. This study compares three different Life Cycle Assessment (LCA approaches for the waste transport in Ladkrabang, Bangkok, Thailand. The three scenarios are modelled using GaBi 7 software tool and results are presented based on the CML 2001. The assessment outcomes indicated that the routing optimization with diesel and electric garbage trucks could significantly reduce the GWP impact by 8.51% and 66.44% compared to the baseline scenario, respectively. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Business viability and carbon footprint of Thai-grown Nam Dok Mai mango powdered drink mix(2020-05-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Preliminary Life Cycle Analysis of Greenhouse Gas Emissions at Transportation Phase of a Beverage Drink for Green Logistics(2021-05-12); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Resource Scheduling Problem in Distribution Center(2019-10-25) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Carbon Footprint Assessment of Food Waste Disposal Methods in a Thai Hypermarket’s Fresh Food Department(2026-04-01); ; ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Stakeholder collaboration for solid waste management in a small tourism island(2023-07-01); Filimonau, ViachaslauAlthough stakeholder collaboration is key for sustainable development of tourism in small islands, research on its determinants is only emerging. The lack of empirical studies hampers an understanding of how effective stakeholder partnerships for sustainability in small tourism islands can be formed and sustained. To partially address this knowledge gap, this study explores stakeholder collaboration for solid waste management in the island of Koh Phayam, Thailand, from the perspective of stakeholder theory, social capital and proximity effect. Semi-structured interviews (n = 26) reveal a lack of understanding of collaboration benefits alongside leadership and reciprocity among stakeholders. However, due to geographical proximity, the level of stakeholder trust in each other is significant, thus indicating potential for future successful partnerships. For these partnerships to become effective, a system of financial incentives for stakeholders to separate and recycle solid waste in situ should be designed. To improve stakeholder communication and reciprocity, capacity building workshops and round tables can be organised. Municipal authorities should lead on solid waste management, and a steering committee comprising the representatives of all other stakeholders needs to be established to oversee the work of municipal authorities. Lastly, the feasibility of setting private public partnerships for solid waste management in Koh Phayam should be considered given the significant extent of knowledge and trust among local stakeholders. External stakeholders, such as farmers, can be involved in management of organic waste, thus extending the scope of partnerships for sustainability beyond the island. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Carbon footprint assessment of home-stays in Thailand(2021-01-01); Filimonau, ViachaslauHome-stays represent a popular category of tourist accommodation in South-East Asia but their carbon footprint has not been systematically assessed. This hampers an understanding of the energy consumption patterns of home-stays, impedes identification of the main carbon hotspots in home-stay operations and prevents a comparative analysis of the carbon performance of home-stays against other tourist accommodation categories. Using the method of screening Life Cycle Energy Analysis (LCEA), this study assessed the carbon footprint of a sample of home-stays in Thailand and undertook its comparative analysis against other categories of tourist accommodation, globally and in Thailand. The overall annual carbon footprint of home-stays was assessed as low (1.3 tonnes of CO<inf>2</inf>-eq. per home-stay on average) which was due to small size and limited guest amenities. The ‘per guest night’ carbon footprint of home-stays was comparable to that of budget hotels in Thailand (0.32 kg of CO<inf>2</inf>-eq. per home-stay on average) which was attributed to low occupancy driven by high demand seasonality. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, ‘Wasting food is normal!’: How food waste can become the (new) norm in casual dining restaurants(2025-03-01); Filimonau, ViachaslauFood waste is a major societal challenge, and hospitality and foodservice organisations make a significant contribution to its occurrence. Although research on food waste in these organisations is emerging, there remains a limited understanding of the underlying reasons behind managerial inaction on its mitigation. This mixed methods study employs neutralization theory, specifically the concept of normalization of deviance, to examine the sociological impediments of effective food waste mitigation among managers of casual dining restaurants in Bangkok, Thailand (n = 17). The findings delineate the process of how food waste can become perceived by managers as a norm and outline the factors contributing to this normalization, namely repeated personal observations of food waste generation, peer reports and media influence. By understanding the determinants of managerial disengagement with food waste mitigation, the study outlines potential interventions exemplified by the design of educational campaigns, regular food waste audits, set-up of corporate goals on food waste reduction and changes to how food waste is presented in the media.