The objectives of this research were: 1. to study the level of participation in solid waste management of Thung Luang Sub-District Municipality. Suwannaphum District, Roi Et Province, 2. to compare the participation of people in solid waste management of Thung Luang Subdistrict Municipality. Suwannaphum District Roi ed, classified  by personal factors and  3. to study problems obstacles and suggestions for public participation in solid waste management of Thung Luang Subdistrict Municipality Suwannaphum District Roi ed

Methodology was the mixed methods: the quantitative research collected data with questionnaires which have the whole confidence value equal to 0.983 from 381 samples who were people at   Thung Luang Sub-District Municipality the data were analyzed by frequency, percentage, mean and standard deviation. t-test and testing the F- value with one-way analysis of variance.  In the case of 3 or more paired variables, when there were differences, the comparison of the mean difference is paired by the least significant difference method. Gualitative research collected data from 12 key informants by in-depth interview and analyzed data by descriptive interpretation.

Findings of the research were as follows:      

1. The level of people participation in Solid waste management of Tambon Thung Luang Municipality, Suvarnabhumi District, Roi Et Province, by overall, was  at a high level ( = 3.51, S.D. = 0.738). Each aspect was also at high level, namely, people participate in the waste disposal management of Thung Luang Subdistrict Municipality. Suwannaphum District Roi ed was at the moderate level, the participation in the project evaluation was at high level (  = 3.35, S.D. = 0.887) while the participation in receiving benefits was at high level (  = 3.66, S.D. = 0.806) the participation in the operation was at high level (  = 3.57, S.D.  =  0.778) and participation in decision making was at high level
(  3.44, S.D. = 0.841) respectively.

2. The comparison of people participation in solid waste management of Tambon Thung Luang Municipality, Suvarnabhumi District, Roi Et Province, classified by personal factors, indicated that  peoplewith different age, educational level and different income participated in the management at different level with statistical significance at 0.05, therefore accepting the set research hypotheses.
For people with different sex and occupations participated in the management of solid waste disposal at no different level, rejecting the set hypothesis.

3. Problems and obstacles of people participation in solid waste management of Tambon Thung Luang Municipality, Suvarnabhumi District, Roi Et Province were that;
1) People rarely have time to participate in decision making. All parties concerned did not have time to discuss the matters, 2) The municipality did not have  trucks  to collect garbage and had no garbage dumping sites systematically, 3) Garbage separation for selling with inappriate price, 4) The municipality did not have trucks for garbage collection systematically, there was not details could be found, The garbage separation equipment were not enough to meet the needs of the community.

Suggestions for public participation in solid waste management of Thung Luang Sub-District Municipality Suwannaphum District Roi Et Province were that:
1) Campaigns and public relations must be done consistently and continuously, which is another way to encourage people to be aware of and follow, 2) Campaign and publicize on waste reduction by sorting waste, from the source of some recycled waste and the use of wet waste for composting, 3) To provide middlemen to buy the garbage at a reasonable price, 4) Allow public the opportunity to participate in the management as an evaluation committee for municipal waste management.

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