Produksi Gas Buangan Ternak Babi yang Diumbar di Gaya Baru dan Sekitar Pasar Wosi, Manokwari

The research aims to estimate the manure production and calculate methane gas produced by pig free-ranging system in Gaya Baru surrounding of Wosi Market Manokwari. This is conducted from May June 2018. methods used this study are observation, interviews, literature study. Direct observations field carried out calculating population estimating body weight measuring length chest circumference according Winter formula. Furthermore, calculation amount fresh dung (KTS) pigs out. parameter observed systems. Research interview, review with a descriptive statistical approach. systems its surroundings produce ammonia at 0.246617 ppm/day, biogas 10.95m3/year, equivalent 3996.75m3 per year, 10.85 m³ day, or 130.18 year. If condition allowed continue, will have social impact, but also environmental health problems around sites.