?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=OPTIMALISASI+PRODUKSI+GULA+REDUKSI+DARI+ONGGOK+SEBAGAI+BAHAN+BAKU+BIOETANOL+DENGAN+PRAPERLAKUAN+ULTRASONIKASI+(OPTIMALIZATION+OF+REDUCING+SUGAR+PRODUCTION+FROM+CASSAVA+WASTE+AS+RAW+MATERIAL+OF+BIOETHANOL+WITH+ULTRASONICATION+PRETREATMENT)&rft.creator=Zubaidi%2C+Juwita+Ratna+Sari&rft.subject=Q+Science+(General)&rft.subject=QD+Chemistry&rft.description=Penelitian+ini+dilakukan+sebagai+upaya+untuk+optimalisasi+produksi+gula+reduksi+sebagai+bahan+baku+bioetanol+dari+onggok+dengan+praperlakuan+ultrasonikasi%2C+dengan+fokus+utama+mempelajari+pengaruh+waktu+ultrasonikasi+terhadap+kemudahan+onggok+untuk+dihidrolisis%2C+yang+ditunjukkan+dengan+kadar+gula+reduksi+dalam+hidrolisat.+Untuk+mempelajari+pengaruh+waktu+ultrasonikasi%2C+serangkaian+percobaan+dilakukan+menggunakan+gelombang+ultrasound+dengan+frekuensi+40+kHz+dan+suhu+30+oC%2C+dengan+waktu+yang+berbeda%2C+yakni+1-7+jam.+Untuk+menentukan+waktu+ultrasonikasi+optimum%2C+kadar+gula+reduksi+sampel+setelah+perlakuan+dianalisis+menggunakan+metode+spektrofotometri+UV-Vis.+Sampel+yang+diperoleh+dengan+waktu+ultrasonikasi+optimum+selanjutnya+dihidrolisis+pada+pH%3D2%2C+suhu+90+oC+selama+1-7+jam.+Percobaan+ini+dilakukan+untuk+menentukan+waktu+hidrolisis+optimum.+Sampel+yang+dihasilkan+dari+perlakuan+optimum+selanjutnya+difermentasi+menggunakan+serbuk+kulit+kayu+raru+dan+Saccharomyces+cerevisiae+selama+72+jam.+Kadar+etanol+yang+dihasilkan+ditentukan+dengan+kromatografi+gas.+Hasil+penelitian+menunjukkan+bahwa+waktu+ultrasonikasi+optimum+adalah+3+jam+dan+waktu+hidrolisis+optimum+adalah+2+jam.+Hasil+uji+fermentasi+menunjukkan+bahwa+kulit+kayu+raru+mampu+mengubah+gula+reduksi+dalam+hidrolisat+menjadi+bioetanol%2C+namun+unjuk+kerjanya+masih+lebih+rendah+dibanding+Saccharomyces+cerevisiae.%0D%0AKata+kunci%3A+Onggok%2C+ultrasonikasi%2C+hidrolisis%2C+fermentasi%2C+kayu+raru%2C+Saccharomyces+cerevisiae.+(This+study+was+conducted+in+an+effort+to+optimize+the+production+of+reducing+sugar+from+cassava+waste+with+the+aid+of+ultrasonication+pretreatment%2C+with+the+main+focuss+to+investigate+the+effect+of+ultrasonication+time+and+hydrolysis+time+on+the+reducing+sugar+content+of+the+hydrolizates.+The+hydrolizate+with+the+highest+reducing+sugar+content+was+subjected+to+fermentation+experiments+using+the+powdered+bark+of+Raru+tree+and+Saccharomyces+cerevisiae.+The+bioethanol+produced+was+analyzed+by+gas+chromatography+method+using+flame+ionisation+detector.+The+results+obtained+demosntrated+that+utasonication+pretreatment+led+to+imporoved+hydrolysability+of+the+sample%2C+as+indicated+by+very+significant+increased+of+reducing+sugar+produced+compared+to+that+produced+from+untreated+sample.+Fermentation+experiments+indicated+that+the+reducing+sugar+produced+can+be+converted+into+bioethanol+by+both+fermenting+agents%2C+however+the+bark+of+Raru+tree+is+less+effective+than+Saccharomyces+cerevisiae.%0D%0AKeyword%3A+cassava+waste%2C+ultrasonication%2C+hydrolysis%2C+fermentation%2C+bark+of+Raru+tree%2C+Saccharomyces+cerevisiae.)&rft.publisher=Fakultas+MIPA&rft.date=2013-09-23&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F1%2FCOVER%2520DALAM.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F2%2FABSTRACT.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F3%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F4%2FLEMBAR%2520PENGESAHSAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F5%2FLEMBAR%2520PERSETUJUAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F6%2FDAFTAR%2520ISI.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F7%2FBAB%2520I.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F8%2FBAB%2520II.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F9%2FBAB%2520III.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F10%2FBAB%2520IV%2520.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F11%2FBAB%2520V.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F12%2FDAFTAR%2520PUSTAKA.pdf&rft.format=archive&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F13%2FLAMPIRAN.zip&rft.identifier=++Zubaidi%2C+Juwita+Ratna+Sari++(2013)+OPTIMALISASI+PRODUKSI+GULA+REDUKSI+DARI+ONGGOK+SEBAGAI+BAHAN+BAKU+BIOETANOL+DENGAN+PRAPERLAKUAN+ULTRASONIKASI+(OPTIMALIZATION+OF+REDUCING+SUGAR+PRODUCTION+FROM+CASSAVA+WASTE+AS+RAW+MATERIAL+OF+BIOETHANOL+WITH+ULTRASONICATION+PRETREATMENT).++Fakultas+MIPA%2C+Universitas+Lampung.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F901%2F