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The objectives of this research were to study waste 1) sorting conditions, 2) composition, and 3) management problems in student dormitories at Naresuan University using qualitative and survey research methods. The sample group consisted of dormitory occupants, volunteer students, housekeepers, and staffs of the Student Affairs Division. Data were collected from student’s and housekeepers’ dumping behavior, sorting recyclable waste through non-participant observation and in-depth interviews. For waste sampling, the quartering method was utilized to find the percentage of waste composition and necessary data for content analysis.The results indicated that 1) In the dormitory, there is only one type of waste sorting, which is recycling wastes (plastic, paper, cans, and glass) dropped into a recycling container. Disposing wet and hazardous wastes were dropped at the general waste collection area together. 2) General waste, such as plastic bags and contaminated foam is the most common component, averaging 5.78 kg/day (57.8%). Food waste followed, with an average volume of 1.94 kg/day (19.4%) and recyclable waste, with 1.02 kg/day (10.2%). The waste recycling area averages 358.5 kg/ two weeks, with PET plastic having the highest volume of 130 kg. (36.2%), followed by other plastic (HDPE, PP, PS) at 74 kg. (20.6%). 3) This research identified the following waste management problems: insufficient promotion for students to separate organic and hazardous waste, students’ lack of participation and understanding in recyclable waste classification, and the absence of integration in waste management of all stakeholders. Therefore, encouraging students to sort out types of waste properly from the beginning, raising awareness through workshop activities and communicating waste management methods in the student dormitory manual, social media and collection areas as well as encouraging participation in waste management with all stakeholders is very important.
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