Proceeding2562

35 การประชุมวิชาการระดับชาติมหาวิทยาลัยทักษิณ ครั้งที่ 29 ประจ�ำปี 2562 วิจัยและนวัตกรรมเพื่อการพัฒนาที่ยั่งยืน Tobacco waste residue as the N-source for composting Banjarata Jolanun 1* and Katesuda Sitthisantikul Abstract Introduction: Nowadays a toxic free farming group of On-Tai local community lacks of dungs which are composed of essential nutrients for producing compost. However, the On-Tai municipality is the source of tobacco cultivation which is promoted the numerous quantities of tobacco residual materials and required proper handling of wastes. Thus, this study by integrating the concept of waste disposal and waste utilization is achieved by recycling tobacco waste residues as the N-source for composting of On-Tai toxic free farming group. Objectives: To apply the tobacco waste residues as the N sources for community-based composting by forced aeration with negative pressure mode. Methods: The pilot scale (1-1.5 ton/pile) of two replicates composting piles was investigated. The mixture was piled with tobacco waste residues: dry leaves at the ratio of 1:1 (by mass) and the organic pellet fertilizer was added (3-5% by mass) and used as the inoculums. The initial C/N ratio and moisture content of the mixture were about of 20-25 and 60-65%, respectively. During the composting, physical and chemical changes are monitored and the effectiveness of the negative pressure mode composting was also evaluated until the end of observation (60 days). Results: Results revealed that composting of tobacco waste residues with dry leaves by using negative pressure mode was an appropriate technology in this investigation. For the composting performance, it was found that the thermophilic temperatures (61.7-63 ºC) were enhanced rapidly as well as the activity of biodegradation, thus satisfying the PFRPs (Process to Further Reduce Pathogens). Results agreed that the tobacco waste residues can be applied as the N-source for composting instead of dungs practically, and the qualities of final compost were acceptable to the recommended criteria regulated by Department of Agriculture of Thailand (2551 B.E.). Keywords: tobacco residues, nitrogen source, compost, composting