| Complete utilization of wet spent coffee grounds waste as a novel feedstock for antioxidant, biodiesel, and bio-char production C Tongcumpou, P Usapein, N Tuntiwiwattanapun Industrial Crops and Products 138, 111484, 2019 | 57 | 2019 |
| The energy usage and environmental impact assessment of spent coffee grounds biodiesel production by an in-situ transesterification process N Tuntiwiwattanapun, P Usapein, C Tongcumpou Energy for Sustainable Development 40, 50-58, 2017 | 47 | 2017 |
| Options for sustainable industrial waste management toward zero landfill waste in a high-density polyethylene (HDPE) factory in Thailand P Usapein, O Chavalparit Journal of material cycles and waste management 16, 373-383, 2014 | 35 | 2014 |
| Development of sustainable waste management toward zero landfill waste for the petrochemical industry in Thailand using a comprehensive 3R methodology: A case study P Usapein, O Chavalparit Waste management & research 32 (6), 509-518, 2014 | 27 | 2014 |
| Efficient transport and selective extraction of Cr (VI) from waste pickling solution of the stainless steel-cold rolled plate process using Aliquat 336 via HFSLM P Usapein, AW Lothongkum, P Ramakul, U Pancharoen Korean Journal of Chemical Engineering 26, 791-798, 2009 | 22 | 2009 |
| Life cycle assessment of producing electricity in Thailand: a case study of natural gas power plant P Usapein, O Chavalparit MATEC Web of Conferences 103, 05009, 2017 | 19 | 2017 |
| Reliable determination of copper complex ions in synthetic wastewater using flame atomic absorption spectrophotometry K Supong, P Usapein Water Science and Technology 79 (5), 833-841, 2019 | 18 | 2019 |
| Life cycle assessment of bio-sludge for disposal with different alternative waste management scenarios: a case study of an olefin factory in Thailand P Usapein, O Chavalparit Journal of Material Cycles and Waste Management 19, 545-559, 2017 | 18 | 2017 |
| A start-up MRV system for an emission trading scheme in Thailand: A case study in the petrochemical industry P Usapein, O Chavalparit Journal of Cleaner Production 142, 3396-3408, 2017 | 16 | 2017 |
| An evaluation of economic potential solar photovoltaic farm in Thailand: Case study of polycrystalline silicon and amorphous silicon thin film C Suphahitanukool, I Hunsacharoonroj, P Usapein, J Khedari, ... International Journal of Energy Economics and Policy 8 (4), 33-41, 2018 | 12 | 2018 |
| Transition Pathway Palm Oil Research Framework toward a Bio-circular-green Economy Model using SWOT analysis: a case study of Thailand P Usapein, N Tuntiwiwattanapun, P Polburee, P Veerakul, C Seekao, ... Frontiers in Environmental Science 10, 877329, 2022 | 11 | 2022 |
| Ranking of renewable energy for the national electricity plan in Thailand using an analytical hierarchy process (AHP) R Chanchawee, P Usapein International Journal of Renewable Energy Research (IJRER) 8 (3), 1553-1562, 2018 | 11 | 2018 |
| Selective separation of trace nickel (II) and gold (I) ions via hollow fiber supported liquid membrane enhanced by synergistic extractants D2EHPA/TBP W Srirachat, P Usapein, S Kheawhom, U Pancharoen Arabian Journal of Chemistry 14 (12), 103427, 2021 | 10 | 2021 |
| Evaluating the performance of 3R options to reduce landfill wastes using the 3R indicator (3RI): case study of polyethylene factories in Thailand P Usapein, O Chavalparit Journal of Material Cycles and Waste Management 17, 303-311, 2015 | 10 | 2015 |
| Microgrid policies: a review of technologies and key drivers of Thailand T Meenual, P Usapein Frontiers in Energy Research 9, 591537, 2021 | 9 | 2021 |
| Greenhouse gas emission in jewelry industry: A case study of silver flat ring P Usapein, C Tongcumpou Applied Environmental Research 38 (1), 11-18, 2016 | 8 | 2016 |
| Impact of electronic toll collection system on energy saving and CO2 emission: a case study of passenger cars in Thailand C Kheawubon, P Usapein, J Khedari International Journal of Renewable Energy Research (IJRER) 8 (4), 1840-1848, 2018 | 7 | 2018 |
| Life cycle assessment of Napier Pakchong 1 grass as a feedstock for anaerobic digestion to produce electricity: A case study in Thailand P Bangprasit, O Chavalparit, P Usapein 2017 International Conference on Green Energy and Applications (ICGEA), 123-129, 2017 | 7 | 2017 |
| Regulatory challenge of the license and permission for energy industry operation on renewable energy growth in Thailand S Aggarwal, P Usapein Journal of Infrastructure, Policy and Development 8 (1), 2023 | 2 | 2023 |
| An international comparison of regulatory and licensing for solar rooftop household electricity: A case study of Thailand, India, and Indonesia S Aggarwal, T Meenual, P Usapein International Journal of Energy Economics and Policy 13 (5), 171-178, 2023 | 2 | 2023 |