ประสิทธิภาพและการลงทุนอย่างเหมาะสมของระบบบำบัดน้ำเสียในฟาร์มสุกร / ธีระวุฒิ สุวัธนะเชาว์ = Efficiency and economic scale for investiment of wasterwater treatment system in pig farms / Theerawut Suwathanachao
A survey of wastewater treatment systems of 100 pig farms in six provinces with high pig population: Nakorn Pathom, Ratchaburi, Chonburi, Chachoengsao, Rayong, and Nakorn Ratchasima showed that 23% did not have wastewater treatment system, 54% used ponding system, and 23% used biogas wastewater treatment system. A comparative study of ponding and biogas systems, each of 4 farms, revealed that the two systems could reduce organic matters measured by biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) in wastewater at least 94%. An economic analysis of the two system revealed that the internal rate of return (IRR) of the ponding system was higher than that of the biogas system. This may be explained that the pig farms with biogas system did not take all the advantage of biogas produced from the treatment system.
