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All Journal JURNAL TEKNOLOGI KIMIA DAN INDUSTRI
S Sumarno
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Jln. Prof. Soedarto, Tembalang, Semarang, 50239, Telp/Fax: (024)7460058
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Industrial & Manufacturing Engineering

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PROSES PENGAMBILAN KEMBALI BIOETANOL HASIL FERMENTASI DENGAN METODE ADSORPSI HIDROPHOBIK Agung Nur Hananto Putro; Sherviena Amanda Ardhiany; S Sumarno
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 2, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Bioetanol merupakan salah satu energi alternatif pengganti bahan bakar fosil. Proses produksi bioetanol dengan fermentasi menghasilkan yield sebesar 9-11%, dan proses pemurniannya menggunakan metode destilasi yang hanya bisa digunakan jika yield minimal 9%. Penelitian ini untuk merecovery bioetanol pada hasil fermentasi dengan yield di bawah 9% menggunakan metode adsorpsi hidrophobik dengan variabel kendali adalah suhu kamar dan tekanan 1 atm, sedangkan variabel berubah adalah adsorbent, waktu adsorpsi dan ukuran partikel dari adsorbent. Digunakan adsorbent Mg(OH)2, Ca3(PO4)2, Mgsilikat dan Casilikat dengan ukuran partikel 106 dan 150 mm dan waktu adsorpsi 30 dan 60 menit. Adsorpsi yang terjadi adalah adsorpsi hidrophobik dimana bioetanol sebagai solute lebih diserap oleh adsorbent daripada solvent air. Bioetanol yang terlarut dalam adsorbent dipisahkan dari solvent dengan cara disaring kemudian diuapkan untuk mendapatkan bioetanol murni. Hasil dianalisa dengan metode cawan Conway. Hasil yang diperoleh bahwa adsorbent yang paling baik menyerap etanol adalah Mgsilikat dengan ukuran partikel 106mm dan waktu 60 menit.
ISOLASI AMILOSA DAN AMILOPEKTIN DARI PATI KENTANG Ayuk Niken H; Dicky Adepristian Y; S Sumarno
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 3, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Isolation method is modification method of substances separation based on differences in solubility for amylose and amylopectin starch with high degree of purity. In general, this study aims to isolate the amylose and amylopectin from potato starch. Specifically, this study aims to determine the effect of pH, methods, and the ratio of volume to the percentage of amylose and amylopectin produced. Amylose is an unbranched polymer which, together with amylopectin starch into constituent components. The products of potato starch is used for concentrating liquid food, adhesive component, a mixture of paper and textiles, and in the cosmetics industry. Starch with amylose content used for the manufacture of biodegradable films and tablets, while amylopectin is used for the manufacture of bread, cakes, and can be used as a diet. The experiments were conducted by mixing potato starch solution, complexing solution into a bekker glass with fixed variable potato starch 40 grams, drying temperature 70°C, while the changed variable are the ratio between the volume of an aqueous suspension of potato starch complexing solution and 2:1, 2:2, 2:3, pH 4.5, 5.5, 6.5, and the method used are salting out and complexing agent. The results showed that the pH of mixed solution is the most influential variable. Optimum conditions obtained by the method of salting out with a pH of 6.5 and the ratio of the volume of an aqueous suspension of starch and complexing solution is 2:3, with the acquisition of 97,97% amylose starch and 98,692% amylopectin starch.
Co-Authors Agung Nur Hananto Putro Ayuk Niken H Dicky Adepristian Y Sherviena Amanda Ardhiany