Xylose production from sugarcane bagasse by surface response methodology

Abstract

The aim of this study was to optimize the production of xylose from sugarcane bagasse. The hydrolysis process was carried out to evaluate the effect of temperature and sulphuric acid concentration on the xylose production at 18, 30, and 50 min of hydrolysis. A Central Composite Rotatable Design (CCRD) was used to study two process variables, temperature (111.5; 114.0; 120.0; 126.0 and 128.5°C) and sulphuric acid concentration (0.20; 0.70; 1.90; 3.10 and 3.60% v v -1 ). Sulphuric acid had a greater influence on the hydrolysis process than temperature. At concentrations of sulphuric acid higher than 3.10% (v v -1 ), raising temperature had little influence on the yield of xylose production. The best condition to obtain xylose (266.73 mg g -1 of dry bagasse) was at 18 min of reaction, at 126°C and 3.10% (v v -1 ) of sulphuric acid, representing 96.0% of the theoretical maximum.

Optimization of Xylose Production from Sugarcane Trash by Microwave-Maleic Acid Hydrolysis

“…2a-2c and Table 2show that acid concentration had significant and greater effect than did temperature or duration of heating alone on the xylose yield. This is in agreement with the results of study on optimization of xylose production from sugarcane bagasse by sulfuric acid with conventional heating, that showed the greater effect of sulfuric acid concentration than the temperature (de Paiva et al, 2009). Optimum condition of hydrolysis for producing xylose was using maleic acid of 1.52% with heating temperature of 176 °C for 6.8 min (Fig 2D).…”

“…Therefore, the xylose yield could be decreased when more severe conditons were applied. These phenomena were also reported by other researchers who applied acid hydrolysis of biomass either using conventional heating (Rahman et al, 2007, de Paiva et al, 2009, Zhang et al, 2015, Ji et al, 2017 or microwave heating (Yan et al, 2018). Data in Fig.…”

“…However, they mostly focused on the effects of the pretreatment on the enzyme susceptibility of the solid residues resulted from pretreatment. On the other hand, reports on the production of xylose from the biomass were mostly used inorganic acids, such as sulfuric, hydrochloric, and nitric acids and combined with conventional heating (Ahmed et al, 2001, de Paiva et al, 2009, Rahman et al, 2007, Rocha et al, 2014, Ji et al, 2017, Krishania et al, 2018. The use of microwave and organic for producing xylooligosaccharides from beechwood xylan and corncob hemicellulose with xylose as by product has been reported by Lin et al (2017).…”

Investigating Nutrient Limitation Role on Improvement of Growth and Poly(3-Hydroxybutyrate) Accumulation by Burkholderia sacchari LMG 19450 From Xylose as the Sole Carbon Source

“…In Brazil, 633 × 10 6 tons of sugarcane were processed in the 2017/2018 harvest (https://www.conab.gov.br/info-agro/safras/ cana/boletim-da-safra-de-cana-de-acucar), representing 177 × 10 6 tons of bagasse (Pessoa et al, 1997), part of which is burned to generate energy in the sugar and ethanol mills (Nonato et al, 2001). If submitted to an efficient hydrolysis treatment, as described by Paiva et al (2009), this amount of bagasse would represent up to 430 × 10 5 tons of xylose available to be converted into value-added bioproducts.…”

Xylitol Production From Sugarcane Bagasse Through Ultrasound-Assisted Alkaline Pretreatment and Enzymatic Hydrolysis Followed by Fermentation

“…Brienzo and Carvalho[36] reported that the optimized xylanase concentration of 120 U/g was found to produce 17.98% of total xylose from sugarcane bagasse. Paiva et al[37] reported that acid hydrolysis of sugarcane bagasse with sulfuric acid (3.1% v/v) at 126 °C for 18 min of reaction time produced xylose (266.73 mg/g bagasse)…”