Nukunudompanich, Methawee

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Nukunudompanich, Methawee
Alternative Name
Nukunudompanich, Meethawee
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Email
methawee.nu@kmitl.ac.th

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    Item type:Publication,
    Systematic improvement of source separation designs: the effects of visual prompts and trash bin combinations in enhancing waste separation behavior
    (2026-07-01)
    Soralump, Cheema
    ;
    Phyo Ei, Nine Yawai
    ;
    Nukunudompanich, Methawee
    ;
    Nakaroengrit, Supawan
    ;
    Asingsamanunt, Jarudej
    Source separation is essential for effective waste management, yet research on its efficiency remains limited. This study explores the effects of visual prompt design and bin combinations on waste separation behavior through a two-cycle experimental framework aimed at systematic improvement. In Cycle 1, a survey identified that environmental gain framing combined with numerical data was the most preferred design among all designed visual prompts. Implementation of this design significantly improved recyclable waste separation, with the effective capture rate (effCR) reaching 63.36%. In Cycle 2, while users preferred having more bin categories, the effCR for recyclables peaked at 79.76% in a 3-bin setup and declined to 40.74% in a 5-bin setup. This trend highlights how cognitive overload and choice paralysis negatively impact sorting accuracy as system complexity increases. Additionally, bin transparency proved critical, as the effCR for PET bottles dropped significantly from 85.65% to 35.05% when using untransparent bins. The findings indicate that while numerical environmental prompts drive initial engagement, bin transparency is essential for maintaining material-specific accuracy. However, the success of these interventions depends on keeping bin categories manageable to prevent cognitive overload. Ultimately, this integrated approach provides practical guidance for optimizing separation systems and advancing sustainable waste management practices.
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    Item type:Publication,
    The Perceptive Classification of the Wastes for Recycling and Composting for Sustainable Waste Management
    (2024-01-01)
    Leeabai, Nattapon
    ;
    Nukunudompanich, Methawee
    ;
    Areeprasert, Chinnathan
    The problem with municipal solid waste (MSW) in Thailand necessitates the well-planned MSW management is important. The perceptive classification of waste is the effective tool to design MSW management and waste separation campaign. It was found that the perceptive classification of the waste was significantly graded in order to the characteristics of the waste. The certain numbers of the wastes were high perceptive classification to the target category. Thus, the perceptual classification of these wastes did not prevent their separation into the designated waste bin. On the other hand, careful attention was required to increase the perception classification of aluminum foil as recyclable waste. The perceptive classification of recyclable waste on aluminum foil was too low, and it was around 37.66%. Misclassification may result from a misunderstanding of the waste type. In addition, some wastes were hardly segregated to a specific category, and there were depending on the implementation process in the MSW management system. For example, the perceptive classification of tissue paper as compostable wastes was low. To design the composting process including the input of tissue paper, the campaign to improve the perceptive classification on tissue papers was recommended. In contrast, the implementation of composting without the input of tissue paper did not need the campaign to modify the perceptive classification on tissue papers. Therefore, the significant findings of this study will be the designing tools to enable the effective and sustainability MSW management.
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    Integrated Assessment of Rooftop Photovoltaic Systems and Carbon Footprint for Organization: A Case Study of an Educational Facility in Thailand
    (2025-05-01)
    Leeabai, Nattapon
    ;
    Sakaraphantip, Natthakarn
    ;
    Kunbuala, Neeraphat
    ;
    Roongrueng, Kamonchanok
    ;
    Nukunudompanich, Methawee
    This study presents an integrated methodology to assess and reduce greenhouse gas (GHG) emissions in institutional buildings by combining organizational carbon footprint (CFO) analysis with rooftop photovoltaic (PV) system simulation. The HM Building at King Mongkut’s Institute of Technology Ladkrabang (KMITL), Thailand, was selected as a case study to evaluate carbon emissions and the feasibility of solar-based mitigation strategies. The CFO assessment, conducted in accordance with ISO 14064-1:2018 and the Thailand Greenhouse Gas Management Organization (TGO) guidelines, identified total emissions of 1841.04 tCO<inf>2</inf>e/year, with Scope 2 electricity-related emissions accounting for 442.00 tCO<inf>2</inf>e/year. Appliance-level audits revealed that classroom activities represent 36.7% of the building’s electricity demand. These findings were validated using utility data totaling 850,000 kWh/year. A rooftop PV system with a capacity of 207 kWp was simulated using PVsyst software (version 7.1), incorporating site-specific solar irradiance and technical loss parameters. Monocrystalline modules produced the highest energy output of 292,000 kWh/year, capable of offsetting 151.84 tCO<inf>2</inf>e/year, equivalent to 34.4% of Scope 2 emissions. Economic evaluation indicated a 7.4-year payback period, with a net present value (NPV) of THB 12.49 million and an internal rate of return (IRR) of 12.79%. The integration of verified CFO data with empirical load modeling and derated PV performance projections provides a robust, scalable framework for institutional carbon mitigation. This approach supports data-driven Net Zero campus planning aligned with Thailand’s Nationally Determined Contributions (NDCs) and carbon neutrality policies.