Ballast weight review of capsule husk Jatropha curcas Linn. on acid fermentation first stage in two phase anaerobic digestion
Date
2017
Authors
Adinurani, P.G.
Setyobudi, R.H.
Wahono, S.K.
Mel, M.
Nindita, A.
Purbajanti, E.
Harsono, S.S.
Malala, A.R.
Nelwan, L.O.
Sasmito, A.
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Journal article
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Proceedings of the Pakistan Academy of Sciences, 2017; 54(1B):47-57
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Abstract
Increasing biogas production through the use of Dried Capsule Husk - Jatropha curcas Linn. (DH-JcL) as raw materials study was conducted at PT Bumimas Ekapersada experiment field, in Bekasi, West Java, Indonesia from September 2013 to March 2014. Four HDPE pipes with 5 L volume used as first stage-hydrolysis digester, while an HDPE (high-density polyethylene) drum with working volume 80 L was used as second phase - methanogenesis digester. DH-JcL at the first stage was pressed by a 1 800 g ballast, which was to be compared to a 900 g ballast pressed, diluted in water with volume ratio of 1:8. One third of the second stage digester was filled by immobilized growth of random packing system on special plastic design. Organic Loading Rate was predetermied at 3 000 cc · d –1 with Hydrolic Retention Time of 4 wk. This study was repeated three times and conclusion was made using t test as inferential statistics. The test concluded that 900 g ballast produced the best result. DH-JcL biogas productivity is increased, by two phase system, as much as 163 % when compared to semi continuous single phase system. Furthermore, the set up produces methane content higher (90 % to 91 %) than semi continuous single phase system (83.15 %). VFA average decrease of 16 %, and average alkalinity decreased by 11 %. Average ratio of VFA/ alkalinity is 0.5 similar with semi continuous single phase system.
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Copyright 2017 Pakistan Academy of Sciences.