Determination of microfibers from laundry wastewater and its possible treatment systems | |
| Author | Nattida Phutthivanit |
| Call Number | AIT RSPR no.MPA-21-20 |
| Subject(s) | Wastewater--Treatment Microplastics--Environmental aspects |
| Note | A research study submitted in partial fulfillment of the requirements for the degree of Master in Marine Plastics Abatement |
| Publisher | Asian Institute of Technology |
| Abstract | Microfibers have become a pollution problem because they are prevalent and affect living things. This study aims to investigate the abundant and characteristics of microfibers from laundry stations in Asian Institute of Technology which represent the real condition of household washing. Result estimated the average of microplastics release were 2.24±0.64 mg/L and the average number were 162±22.68 particles/L. The characteristics of microplastics revealed that fibers were predominant of all microplastics founded in this study. The majority size and color distribution of microfibers were 1000-5000 μm and white (88.2%). In addition, high density flotation were conducted to evaluate the performance to remove the microfibers with varies of flotation media consist of NaCl, K2CO3 and ZnCl2. The optimal mixing ratio (flotation media:wastewater) and mixing time on the percentage recovery of microfibers were studied. The results revealed that a ratio of 1:1 mixing of NaCl with wastewater was optimal in terms of percentage of recovery and economy. The optimal ratio of K2CO3 was 0.25:0.75. Due to commercial-grade ZnCl2 precipitation, the percent recovery cannot be calculated and no additional optimal studies have been performed. The optimum mixing times of NaCl and K2CO3 are 3 minutes and 5 minutes respectively. However, this study found that the percentage recovery of flotation was not as efficient as expected, with the highest percentage recovery of NaCl and K2CO3 being 38.10±10.91 and 27.86±12.28, respectively, due to organic interference and stirring methods. |
| Year | 2021 |
| Type | Research Study Project Report (RSPR) |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Marine Plastic Abatement (MPA) |
| Chairperson(s) | Thammarat Koottatep |
| Examination Committee(s) | Chongrak Polprasert;Nguyen Thi Kim Oanh |
| Scholarship Donor(s) | Government of Japan |
| Degree | Research studies project report (M.) - Asian Institute of Technology, 2021 |