STUDI PEMBUATAN SABUN MANDI CAIR DARI DAUR ULANG MINYAK GORENG BEKAS (KAJIAN PENGARUH LAMA PENGADUKAN DAN RASIO AIR:SABUN TERHADAP KUALITAS)
ABSTRACT: The aim of this
study is to find out the best combination treatment of the processing of liquid
soap from recycled frying oil. The
process step of refining was as follow: steaming with ratio water to oil of 1:1
(w/w), neutralization with NaOH 4N, and bleaching with bentonit 0,84%
(w/w). The factorial experiment was
employed by Randomized Block Design,
mixing time (60, 90 and 120 minutes) was the first factor, and water/soap
ratio (2:1; 3:1 and 4:1 w/w) was second factor. Analysis on the product
included pH, residual of free alkali, foam ability, viscosity, fatty acid
total, and the sensory evaluation was
conducted on the appearance, viscosity, foam ability, astringency, and aroma.
The results showed that the best combination treatment achieved by mixing time
of 90 minutes and water/soap ratio of 2:1 w/w.
The liquid soap had characteristics of pH value of 10.07, residual free
alkali of 0.03%, foam ability of 2,03
cm, viscosity of 5.20 cps, and residual fatty acid of 8.60%, and the organoleptic evaluation indicated that
the product had the preference of appearance of 3.27 (neutral), viscosity of
2.97 (less preferred), foam ability of 2.4 (less preferred), astrigency of 3 (neutral), and
aroma of 3.87 (neutral).
Keywords: liquid soap, mixing,
water/soap ratio, recycled frying oil, refining
Penulis: Susinggih Wijana,
Soemarjo, Titik Harnawi
Kode Jurnal: jppertaniandd090009
