The situation analysis and the optimal selection of plastic waste management in the context of circular economy in selected Asian countries | |
| Author | Ono, Sayaka |
| Call Number | AIT Diss no.EV-23-01 |
| Subject(s) | Circular economy--Asia Plastic scrap--Management--Asia Plastics--Recycling--Asia Plastic scrap--Goverment policy--Asia |
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | This research delved into plastic waste management (PWM) and recycling technologies across Japan, Thailand, India, Sri Lanka, and Pakistan, assessing the optimal strategies in a circular economy context. Central to the investigation are current PWM situations, the most suitable recycling approach for Polyethylene Terephthalate (PET) in Japan, and stakeholder preferences for PET recycling in the other countries were discussed. Using a combination of qualitative and quantitative methods based on interviews and surveys, the study employs SWOT analysis, Multi-Criteria Decision Analysis (MCDA), and descriptive and inferential statistical analysis. A thorough SWOT analysis details pivotal areas: the Extended Producer Responsibility (EPR) system, thermal recycling, the plastic recycling industry, and the role of public awareness. The optimal PET recycling technology in Japan was determined using MCDA with criteria from environmental, economic, and social aspects. In addition, stakeholder views from the four countries except for Japan were examined through an online survey, emphasizing key indicators for selecting PET recycling technology. The results show that Japan excels with its EPR and thermal recycling, supported by the government, and prefers mechanical recycling for its environmental benefits. India leverages its informal sector and refines the EPR. Thailand and Sri Lanka are evolving their EPR, benefiting from foreign investments and youth initiatives. In Pakistan, EPR is evolving with the national government's endorsement of thermal recycling. The study offers tailored policy suggestions for each country. Japan should vary its recycling methods and revitalize public awareness. India should improve its EPR framework and technology, while Thailand and Sri Lanka need to focus on data integrity and public involvement. To tackle plastic pollution in Pakistan, a holistic strategy is needed, balancing promising solutions like EPR with challenges in waste management and public awareness. For future research, it is recommended to conduct more context-specific studies, especially at the local level using detailed data. Gathering data from a broader range of stakeholders is also advisable. |
| Year | 2023 |
| Type | Dissertation |
| School | School of Environment, Resources, and Development |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Tsusaka, Takuji W.; |
| Examination Committee(s) | Thammarat Koottatep;Xue, Wenchao; |
| Scholarship Donor(s) | AIT Scholarships; |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 2023 |