Process development for detoxification of corncob hydrolysate using activated charcoal for xylitol production

Xylitol was produced by Candida guilliermondii from charcoal-treated and untreated rice straw hemicellulosic hydrolysate with or without nutrients (ammonium sulphate, calcium chloride, rice bran extract). Both, xylitol yield and volumetric productivity decreased significantly when the nutrients were added to treated and untreated hydrolysates. In the treated hydrolysate, the efficiency of xylose conversion to xylitol was 79% when the nutrients were omitted. The results demonstrated that rice straw hemicellulosic hydrolysate treated with activated charcoal was a cheap source of xylose and other nutrients for xylitol production by C. guilliermondii. The non-necessity of adding nutrients to the hydrolysate media would be very advantageous since the process becomes less costly.

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Sequential detoxification of oil palm fronds hydrolysate with coconut shell activated charcoal and pH controlled in bioreactor for xylitol production

Chemical Engineering Research and Design ◽

10.1016/j.cherd.2022.01.008 ◽

2022 ◽

Author(s):

Shareena Fairuz Abdul Manaf ◽

Abdullah Amru Indera Luthfi ◽

Jamaliah Md Jahim ◽

Shuhaida Harun ◽

Jian Ping Tan ◽

...

Keyword(s):

Oil Palm ◽

Activated Charcoal ◽

Coconut Shell ◽

Xylitol Production ◽

Oil Palm Fronds ◽

Palm Fronds ◽

Ph Controlled

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Effect of pH and activated charcoal adsorption on hemicellulosic hydrolysate detoxification for xylitol production

Journal of Chemical Technology & Biotechnology ◽

10.1002/jctb.1026 ◽

2004 ◽

Vol 79 (6) ◽

pp. 590-596 ◽

Cited By ~ 43

Author(s):

Solange I Mussatto ◽

Júlio C Santos ◽

Inês C Roberto

Keyword(s):

Activated Charcoal ◽

Xylitol Production ◽

Effect Of Ph ◽

Hemicellulosic Hydrolysate ◽

Charcoal Adsorption ◽

Activated Charcoal Adsorption

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Downstream Processing for Xylitol Recovery from Fermented Sugar Cane Bagasse Hydrolysate Using Aluminium Polychloride

Zeitschrift für Naturforschung C ◽

10.1515/znc-2000-1-204 ◽

2000 ◽

Vol 55 (1-2) ◽

pp. 10-15 ◽

Cited By ~ 4

Author(s):

Silvio S. Silva ◽

Rodrigo M. Ramos ◽

C.G.A. Rodrigues ◽

Ismael M. Mancilha

Keyword(s):

Phenolic Compounds ◽

Lignocellulosic Biomass ◽

Sugar Cane ◽

Activated Charcoal ◽

Downstream Processing ◽

Pharmaceutical Products ◽

Sugar Cane Bagasse ◽

Xylitol Production ◽

Fermentation Parameters ◽

Few Data

Abstract Xylitol, a sweetener comparable to sucrose, is anticariogenic and can be consumed by diabetics. This sugar has been employed sucessfully in many foods and pharmaceutical products. The discovery of microorganisms capable of converting xylose present in lignocellulosic biomass into xylitol offers the opportunity of producing this poliol in a simple way. Xylitol production by biotechnological means using sugar cane bagasse is under study in our laboratories, and fermentation parameters have already been established. However, the downstream processing for xylitol recovery is still a bottleneck on which there is only a few data available in the literature. The present study deals with xylitol recovery from fermented sugar cane bagasse hydrolysate using 5.2 g/l of aluminium polychloride associated with activated charcoal. The experiments were performed at pH 9, 50 °C for 50 min. The results showed that aluminium polychloride and activated charcoal promoted a 93.5% reduction in phenolic compounds and a 9.7% loss of xylitol from the fermented medium , which became more discoloured, facilitating the xylitol separation.

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