FUNDA ELISYIA, 1017011059 (2014) HIDROLISIS PATI UMBI TALAS TARO DI BAWAH PENGARUH ULTRASONIKASI UNTUK MENGHASILKAN GULA REDUKSI SEBAGAI BAHAN BAKU BIOETANOL. Fakultas Mipa, UNIVERSITAS LAMPUNG.
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Abstract
ABSTRAK Pada penelitian ini telah dilakukan studi adsorpsi ion Ca(II), Cu(II), dan Cd(II) oleh biomassa alga Porphyridum sp. Identifikasi gugus fungsi pada biomassa Porphyridium sp dilakukan dengan menggunakan spektrofotometer inframerah (IR). Hasil identifikasi menunjukkan bahwa biomassa Porphyridium sp mengandung gugus –OH, C=O, N-H, dan S=O. Kajian adsorpsi ion Ca(II), Cu(II), dan Cd(II) oleh biomassa Porphyridium sp meliputi penentuan dosis biomassa alga, pH, waktu, dan konsentrasi ion logam menunjukkan bahwa adsorpsi ion Ca(II), Cu(II),dan Cd(II) oleh biomassa Porphyridium sp optimum pada dosis biomassa alga 0,1 g, pH 4, dan waktu pengadukkan 30 menit. Proses adsorpsi ion Ca(II), Cu(II), dan Cd(II) oleh biomassa Porphyridium sp dilakukan dengan metode batch dan kadar logam dianalisis dengan spektrofotometer serapan atom (SSA). Adsorpsi ion Ca(II), Cu(II),dan Cd(II) oleh biomassa Porphyridium sp mengikuti persamaan kinetika pseudo orde dua dengan konstanta laju masing-masing sebesar 45,48; 157,79; 167,98 g mmol-1 menit-1 serta pola adsorpsinya cenderung mengikuti pola adsorpsi isoterm Langmuir dengan kapasitas adsorpsi masing-masing ion logam sebesar 28,63; 37,07; 76,92 mg g-1. Energi adsorpsi masing-masing ion Ca(II), Cu(II), dan Cd(II) oleh biomassa alga Porphyridium sp sebesar 8,14; 14,46; 20,89 kJ mol-1. Kata kunci: Porphyridium sp, kinetika adsorpsi, dan isoterm adsorpsi ABSTRACT This research was conducted to study the potential of taro tuber as raw material for bioetahnol production. For this purpose, as series of hydrolysis experiments was carried out under the influence of ultrasound energy at fixed frequency of 40 kHz to produce a reducing sugar at different pHs, times, and temperatures. Reducing sugar in the hydrolyzates was determined by UV-Vis spectrophotometry method. The results showed the highest reducing sugar concentration (1969.2 mg / L) for primary tuber was achieved by hydrolysis at pH 2, for 90 minutes, at a temperature of 80 0C. For a sample of secondary tuber the optimum condition is hydrolysis at pH 2, for 60 min at 70 0C with a reducing sugar concentration produced was 691.8 mg / L. Fermentation test using the powdered bark of raru plant and Saccharomyces cerevisiae fermentation showed that both agents are capable of converting the reducing sugar into bioethanol. The concentrations of bioetahol produced using Saccharomyces cerevisiae are 20.63% from primary tuber and 26.31% from secondary tuber. The concentrations of bioetahol produced using the bark of raru plant are 5.0% from primary tuber and 2.87% from secondary tuber. Keywords: Tuber taro, ultrasonikasi, hydrolysis, fermentation, wood raru, Saccharomyces cerevisiae.
| Item Type: | Other |
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| Subjects: | A General Works = Karya Karya Umum |
| Divisions: | Fakultas MIPA > Prodi Kimia |
| Depositing User: | A.Md Cahya Anima Putra . |
| Date Deposited: | 12 Dec 2014 02:38 |
| Last Modified: | 12 Dec 2014 02:38 |
| URI: | http://digilib.unila.ac.id/id/eprint/5566 |
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