Methane Emission from Anaerobic Pond of Tapioca Starch Extraction Wastewater in Indonesia

抄録

This study presents the measurement results of biogas production rates in an anaerobic pond of tapioca starch extraction wastewater located in Lampung province, Indonesia. The measurements were carried out in the dry and rainy seasons. The results showed biogas production rates in the range of 25.9-133.4 L/m²/h, and an average biogas production rate of 67.2 L/m²/h. Biogas production rate was affected not only by season and collection position in the lagoon, but also by time of gas collection. From the average biogas production rate in each month, the methane emission factor in pond No. 4 could be estimated at 0.16-0.31 g CH₄/g COD removed. This variation was observed due to changes in water temperature. This study showed the importance of temperature changes for the baseline measurement of greenhouse gas emissions determined by the methane emission factor in CDM projects