Christia Meidiana, Istiq Dhany Nurfitriya, Kartika Eka Sari
Multi-criteria analysis is used in this study to support the decision making of choosing the suitable location for anaerobic digester (AD). Land availability is the main factor in the area of study influencing the interest of farmers to utilize manure for biogas production indicated by low manure utilization rate which is only 22%. The rest is disposed of in ditches and streams threatening the environment. Analytical Hierarchy Process (AHP) comprising four criteria, land suitability, land availability, farmer’s capability, and safety requirement are used to assess the most appropriate AD scale in the study area. The most suitable AD scale has the highest total value. Seven experts in rural biogas management are asked for their opinion about the most appropriate AD scale for processing the manure waste. The result of AHP shows that land availability is the main factor as it has the highest value (77.03%), while farmer’s capability, land suita-bility and safety requirement has less value which is 0.1977, 0.0165 and 0.0155 respectively. Furthermore, household scale AD with ca-pacity from 4 m3 – 12 m3 is the most suitable AD scale for the location. However, not all capacities of AD can be necessarily constructed because of land availability factor. Overlay technique is used to identify the location and type of AD. Overlaid of three variables i.e. interest, land availability and cows ownership comes to the result that there are 155 out of 167 farmers interested in constructing AD. There are 75 farmers who meet the land availability criteria, while 80 farmers have no adequate land area for constructing the AD. However, only 64 individual ADs can be constructed when all variables (interest, land availability and cow ownership) are considered. Other farmers who have interest should be construct either the individual AD under the stall (67 farmers) or communal AD (24 farmers). © BEIESP.
Faculty of1 Engineering, Brawijaya University, Malang, 65147, Indonesia
