Grease Trap Waste Utilization as Fertilizer with the Initial Quality Improvement Process: A Case Study of Hotel at Samui Island, Surat Thani Province
Abstract
This research was conducted in order to examine the initial improvement of grease waste quality before composting, to evaluate the grease waste composting capability with other organic wastes, and to compare the quality of compost products to the Department of Agriculture (DOA) organic fertilizer standard in 2005. Grease wastes used in this study were obtained from a hotel in Samui Island, Surat Thani Province. The quality of grease wastes was initially improved by phosphoric acid (PA), nitric acid, effective microorganisms (EM), and sodium hydrogen sulfate solution at a ratio of 1 : 1 by weight (in gram) per volume (in mL). Different mixing times adopted were 1 hour, 1 day, and 3 days, respectively. Grease wastes mixed with PA and EM for 3 days showed good quality improvements. Afterward, the treated grease wastes were composted with cow manure and saw dust in a rotary tank at the ratio of 40:50:10, respectively. A fresh air was supplied, and a 40-60% of moisture was maintained during 30 days composting. Comparing to the DOA (in 2005) organic fertilizer standard, the composting products had higher nitrogen (>1.0%) and phosphorus (>0.5%) contents. The carbon to nitrogen ratios of compost products (25.94:1 to 33.13:1) were higher than the organic fertilizer standard of 20:1. The germination indices of the green bean seeds germinating in the extracted solution (1:10 ratio of compost duct and extractant) of both control compost product and compost product treated by phosphoric acid which were higher than 80% indicated the toxicity of compost products to seed germination and plant growth. Therefore, the maturation should be conducted to result in the more stable and mature compost products. Since the potassium contents in the compost products were lower than the organic fertilizer standard, the compost products were suitable for the maintenance of stem and leaves of the ornamental plants.Keywords : grease trap waste, mixed materials, hotel, compostingReferences
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Ravichayasub, W., Petthai, T., Seehabut, T. and Kanokkanthapong, W. (2015). Management of Fat Oil and Grease by Composting Process with Night Soil and Sawdust. Journal of Public Health. Speacial: 117-126. (in Thai)
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Tooprakai, S. (2008). Solid Waste Engineering and Hazardous Wastes Management. Ramkhamhaeng University. Retrieved October 14, 2018, from: http://e-book.ram.edu/e-book/e/EVE313(51)/EVE313.pdf. (in Thai)
Chantamas, N. (2014). The Utilization of Waste Grease: Waste Utilization. EAU Heritage Journal Science and Technology, 8(1), 47-54. (in Thai)
Chitpirom, K. and Sangaroon, P. (2012). Detection of Lipid Bacteria from Environmental Samples. Journal of
Public Health, 42(3), 3-18. (in Thai)
Dansakda, S. (2008). A Study of Efficiency of Microorganisms that can Produce Lipase to Remove Fat and Oil Contaminated in Wastewater from the Factory. Master of Science Program in Biotechnology. Graduate School, Maejo University. (in Thai)
Department of Agriculture. (2005a). Organic Fertilizer Guide (Farmer's version). Retrieved October 12, 2018, from: http://aglib.doa.go.th/lib/ images/Downloads/2551/EB00140.pdf. (in Thai)
Department of Agriculture. (2005b). Notification of the Department of Agriculture on Organic Fertilizer Standards BE 2548. Retrieved August 21, 2018, from: http://www.ratchakitcha.soc.go.th/DATA/PDF/2548/00172707.
PDF. (in Thai)
Jolanun, P., Panphan, M., Jawana, R. and Junthong, A. (2008). The Adjustment of Medium-High Range of the C/N for Commercial Composting. KMUTT Research and Development Journal, 31(3), 549-564. (in Thai)
Keawnoi, B. (2015). Future: Special Travel Management. Bank of Thailand Southern Office. (in Thai)
Khamput, P. and Suweero, K. (2013). Prevention of Toxic Seepage from a Landfill to Groundwater Using Natural Latex. Journal of Community Development and Life Quality, 1(2), 101-109. (in Thai)
Ko, H. J., Kim, K. Y., Kim, H. T., Kim, C. N., and Umeda, M. (2008). Evaluation of Maturity Parameters and Heavy Metal Contents in Composts Made from Animal Manure. Waste Management, 28(5), 813-820.
Masub, P., Hatthapoomkaset, P. and Boukhom, S. (2017). Management of Fatty Residue from Food Waste by Composting Process. Special Projects Bachelor of Science Program in Environmental Chemistry. (in Thai)
Pollution Control Department. (2008a). A Guide to Managing Oil and Fat from a Grease Trap and Use it for the Community. Retrieved October 12, 2018, from http://infofile.pcd.go.th/ water/manual_Commu09.pdf? CFID=180918 & CFT OKEN=57069603. (in Thai)
Pollution Control Department. (2008b). A Guide to Managing Oil and Fat from a Grease Trap and Use it for Restaurants. Retrieved October 12, 2018, from: http://infofile.pcd.go.th/water/manual_Restaurant09.pdf?
CFID= 1131508& CFT OKEN=34569850. (in Thai)
Ravichayasub, W., Petthai, T., Seehabut, T. and Kanokkanthapong, W. (2015). Management of Fat Oil and Grease by Composting Process with Night Soil and Sawdust. Journal of Public Health. Speacial: 117-126. (in Thai)
Ritdeaj, N. (2013). What Should We Consider Before Making Compost?. KKU Science Journal, 41(3), 595-606.
(in Thai)
Tooprakai, S. (2008). Solid Waste Engineering and Hazardous Wastes Management. Ramkhamhaeng University. Retrieved October 14, 2018, from: http://e-book.ram.edu/e-book/e/EVE313(51)/EVE313.pdf. (in Thai)
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Published
2019-03-12
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