การประยุกต์ใช้ชุดหมุนเวียนก๊าซ SO2 แบบบังคับแนวตั้งชนิดเคลื่อนย้ายได้สำหรับรมผลลำไยสด
อนุวัฒน์ นันทะยานา ชนวัฒน์ นิทัศน์วิจิตร จักรพงษ์ พิมพ์พิมล และ จาตุพงศ์ วาฤทธิ์
Agricultural Science Journal 42 : 1 (Suppl.) : 501-504 (2011)
2554
บทคัดย่อ
The application of vertically forced circulationfor sulfur dioxide (SO2) fumigation on fresh longan would reduce dosage of sulfur powder incineration, resulting in a decrease in residue sulfur on longan peel and pulp. However, modification of the conventional fumigation room to suit a forced circulation technique requires a major investment for system installation. This study aims to fabricate a mobile units using verticall, forced-SO2 circulation. The study was carried out with 3 treatments: 1) vertically in forced-SO2 circulation at flow rate of 0.8 m3/s with SO2 final concentration of 4,000 ppm. 2) conventional circulation with SO2 at final concentration of 4,000 ppm. 3) conventional circulation with SO2 at final concentration of 15,000 ppm. Results showed that residue sulfur on the peel for the first and third treatments were not significantly different (p>0.05) but both treatments yielded higher residue sulfur on the peel than that from the second treatment (p<0.05). The residue sulfur on the pulp for the first and second treatments were not significantly different (p>0.05) and both treatments yielded less residue sulfur on the pulp than that from the third treatment (p<0.05). The mobile unit vertically forced-SO2 circulation offers a potential for commercial practice as it can reduces residue sulfur on the longan peel below the standard practice.