PEMILIHAN FONDASI CSTR UNTUK PRODUKSI BIOGAS DARI POME DALAM RANGKA MENINGKATKAN PENGEMBANGAN ENERGI TERBARUKAN
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Abstract
Renewable energy development for power generation is in line with the government's program to
increase the share of renewable energy in the national energy mix which is relatively small at the
moment. BPPT, collaborating with PTPN 5 in the Insinas Flagship program, built a pilot plant for biogas
production from Palm Oil Mill Effluent (POME) with a capacity of 700 kW. The reactor used in this pilot
project is a Continuous Stirred Tank Reactor (CSTR) which is the most important operating unit for
producing biogas from POME. Therefore, the selection of the CSTR foundation is crucial since the
main process occurs in the reactor. The scope of this activity is to realize the final design into the
construction of a CSTR pilot plant. Several types of foundations were studied, starting from shallow
foundation type such as tread foundation, deep foundation, until combining shallow foundation type
with deep foundation type. The evaluation of existing data and design review indicates that the use of
Mat Foundation is not suitable due to soil condition at a depth of 0–5m which is in the form of sandy
loam soil with an NSPT value of less than 20. The selection of Piles is based on the calculations using
total vertical load of 3035,37 ton and total horizontal load of 542,57 tons. Considering the availability of
materials and time concern, the recommended foundation type is pile with a diameter of 600 mm type
B and a length of 12 m.
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