Sulfuric Acid Hydrolysis and Detoxification of Red Alga Pterocladiella capillacea for Bioethanol Fermentation with Thermotolerant Yeast Kluyveromyces marxianus

2014 ◽  
Vol 24 (9) ◽  
pp. 1245-1253 ◽  
Author(s):  
Chien-Hui Wu ◽  
Wei-Chen Chien ◽  
Han-Kai Chou ◽  
Jungwoo Yang ◽  
Hong-Ting Victor Lin
Author(s):  
Raphael Hermano Santos Diniz ◽  
Juan C. Villada ◽  
Mariana Caroline Tocantins Alvim ◽  
Pedro Marcus Pereira Vidigal ◽  
Nívea Moreira Vieira ◽  
...  

2018 ◽  
Vol 23 (3) ◽  
pp. 133-138 ◽  
Author(s):  
IZUMI MATSUMOTO ◽  
TAKAHIRO ARAI ◽  
YUI NISHIMOTO ◽  
VICHAI LEELAVATCHARAMAS ◽  
MASAKAZU FURUTA ◽  
...  

2017 ◽  
Vol 39 (4) ◽  
pp. 423 ◽  
Author(s):  
George Meredite Cunha de Castro ◽  
Norma Maria Barros Benevides ◽  
Maulori Curié Cabral ◽  
Rafael De Souza Miranda ◽  
Enéas Gomes Filho ◽  
...  

 The seaweeds are bio-resource rich in sulfated and neutral polysaccharides. The tropical seaweed species used in this study (Solieria filiformis), after dried, shows 65.8% (w/w) carbohydrate, 9.6% (w/w) protein, 1.7% (w/w) lipid, 7.0% (w/w) moisture and 15.9% (w/w) ash. The dried seaweed was easily hydrolyzed under mild conditions (0.5 M sulfuric acid, 20 min.), generating fermentable monosaccharides with a maximum hydrolysis efficiency of 63.21%. Galactose and glucose present in the hydrolyzed were simultaneously fermented by Saccharomyces cerevisiae when the yeast was acclimated to galactose and cultivated in broth containing only galactose. The kinetic parameters of the fermentation of the seaweed hydrolyzed were Y(P⁄S) = 0.48 ± 0.02 g.g−1, PP = 0.27 ± 0.04 g.L−1.h−1, h = 94.1%, representing a 41% increase in bioethanol productivity. Therefore, S. filiformis was a promising renewable resource of polysaccharides easily hydrolyzed, generating a broth rich in fermentable monosaccharides for ethanol production. 


2018 ◽  
Vol 103 (1) ◽  
pp. 395-410 ◽  
Author(s):  
Mochamad Nurcholis ◽  
Sukanya Nitiyon ◽  
Suprayogi ◽  
Nadchanok Rodrussamee ◽  
Noppon Lertwattanasakul ◽  
...  

1985 ◽  
Author(s):  
John F. Harris ◽  
Andrew J. Baker ◽  
Anthony H. Conner ◽  
Thomas W. Jeffries ◽  
James L. Minor ◽  
...  

2014 ◽  
Vol 4 (02) ◽  
Author(s):  
Steven . ◽  
Mardiyati . ◽  
R. Suratman

Rattan is one of natural resources of Indonesia which contains 30%-40% cellulose. Its high cellulose contents makes it very potential as a source of microcrystalline cellulose (MCC). In this research, manau rattan was characterized by using the Chesson methods. Microcrystalline cellulose was prepared by using two methods, i.e. alkalization and acid hydrolysis. Alkalization was performed by soaking manau rattan powder into sodium hydroxide 17,5% for 8 hours. Acid hydrolysis was prepared by using sulfuric acid at a concentration of 0.1 M; 0.3 M; and 0.5 M for 4, 6, 8, and 10 hours. The crystallinity of MCC was quantitatively measured by XRD and qualitatively measured by using FTIR. In this research, we have successfully made microcrystalline cellulose from manau rattan. The highest crystallinity MCC of 72.42% was obtained from acid hydrolysis with 0.5 M for 10 hours. The crystallinity of the MCC product increases with concentration and hydrolysis time.Keywords: acid hydrolisis, alkalization, cellulose, manau rattan, MCCABSTRAKRotan merupakan salah satu kekayaan hayati Indonesia yang mengisi sepuluh persen hutan di Indonesia yang memiliki kadar selulosa mencapai 30-40%. Kadar selulosa yang cukup tinggi membuat rotan sangat berpotensi untuk dimanfaatkan sebagai bahan baku mikrokristalin selulosa (MCC). Rotan manau dikarakterisasi menggunakan metode Chesson. Pembuatan mikrokristalin selulosa terdiri atas dua tahap, yaitu alkalisasi dan hidrolisi asam. Tahap alkalisasi dilakukan dengan merendam rotan di dalam larutan NaOH 17,5% selama 8 jam. Tahap hidrolisis asam dilakukan dengan menggunakan asam sulfat pada berbagai konsentrasi, yakni 0,1; 0,3 dan 0,5 M selama 4, 6, 8, dan 10 jam. Kristalinitas dari MCC yang dihasilkan diukur dengan menggunakan XRD. Untuk mengetahui komposisi kimia serta kristalinitas MCC secara kualitatif, telah dilakukan karakterisasi dengan menggunakan FTIR. Pada penelitian ini, telah berhasil dibuat MCC yang bersumber dari rotan manau. Kristalinitas MCC tertinggi dihasilkan dengan perlakuan hidrolisis asam dengan konsentrasi 0,5 M selama 10 jam, yaitu sebesar 72,42%. Seiring dengan peningkatan konsentrasi serta waktu hidrolisis, kristalinitas MCC yang dihasilkan semakin tinggi.Kata kunci: alkalisasi, hidrolisis asam, selulosa, MCC, rotan manau


2020 ◽  
Vol 238 ◽  
pp. 116180 ◽  
Author(s):  
Huan Zhang ◽  
Yuan Chen ◽  
Shanshan Wang ◽  
Liang Ma ◽  
Yong Yu ◽  
...  

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