PENGARUH KONSENTRASI ASAM ASETAT PADA PERENDAMAN TERHADAP KECEPATAN EKSTRAKSI AGAR-AGAR

Sperisa Distantina, O. Rusman, S. Hartati

Abstract

To improve the agar yield, extraction of seaweed used to be carried out under acidic condition. But the increase of the yield of agar, gelling property of the agar produced tends to decrease, due to inevitable partial hydrolysis of agar. An alternative method of extraction was available, in which seaweeds were soaked with acid solution followed by extraction under neutral condition. Using this method, high yields and high gelling property were obtained. This experiment investigated the effect of acetic acid concentration on yield, volumetric mass transfer coefficient (kca), and equilibrium constant (H) in extraction process. In this research, the seaweeds, glacilaria from Bali, were soaked in an aquoeus acetic acid solution. After being neutralized, the seaweeds were extracted with hot water of 90oC in the closed tree bottle neck. Some of extract samples at various time were dried dan weighed. The evaluation of experimental data showed that yield and both kca and H increase with the increase of acetic acid concentration. Based on research data, the following equation were obtained: H = 0.1331 N + 0,0158
Kca= 0.0131 N+0,0136 The equation were formulated in the range of acetic acid concentration from 0.2N to 0.8N

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DOI: https://doi.org/10.20961/ekuilibrium.v5i1.49592

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