PEMANFAATAN MINYAK GORENG BEKAS UNTUK PEMBUATAN SABUN : KAJIAN LAMA PENYABUNAN DAN KONSENTRASI DEKSTRIN

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ABSTRACT: The research was aimed to find out the best treatment in the making of soap from used frying oil and to analyze its financial feasibility. A randomized factorial block design was used in the experiment. The soap was made by saponifying at various length of time (30; 45, and 60 minutes) and dextrin concentrations of 1 %; 2.5 %; 4 % respectively. The  yields  as  well  as  some  characteristics  of  the  soap,  namely  moisture  content,  the level of free alkali, pH, texture, and middle length of the foam were determined. A sensory evaluation was also performed on the colour and texture of the soap. A financial analysis was  carried  out  to  determine  the  values  of  Break  Even  Point  (BEP),  Payback  Period,  and Return  of  Investment  (ROI)  on  the  manufacturing  of  the  selected  method  of  soap production.
It was found that the best soap was obtained by applying a 30 minutes saponification process combined with the use of 1% dextrin with the soap yield of 87.51% and having the following  characteristics:  moisture  content  7.31  %, free  alkali  content  0.1279  %,  pH  10.4, the  texture  0.0007  mm/g.sec.,  and  the  foam’s  middle  length  of  2.15  cm.  However,  the panelists tends to be like nor dislike to the colour and texture of the product. The value of BEP  is  50,387  units  at  a  value  of  Rp.13,574,333.00,  which  was  equivalent  with  a production capacity of 45 kg/day. The respective values of Payback Period and ROI were 50 months (4 years and 2 months) and 18.49 %.
Key words: used frying oil, soap, saponification, dextrin
Penulis: Susinggih Wijana, Siti Asmaul Mustaniroh dan Indha Wahyuningrum
Kode Jurnal: jppertaniandd050040

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Jp Pertanian dd 2005