The Experts below are selected from a list of 16491 Experts worldwide ranked by ideXlab platform
Cristiane S. Farinas - One of the best experts on this subject based on the ideXlab platform.
-
addition of feruloyl esterase and xylanase produced on site improves Sugarcane Bagasse hydrolysis
Bioresource Technology, 2014Co-Authors: Douglas A. A. Paixão, Cleiton Marcio Pinto Braga, Priscila Da Silva Delabona, Deise Juliana Da Silva Lima, Jose Geraldo Da Cruz Pradella, Cristiane S. FarinasAbstract:Abstract Accessory enzymes that assist biomass degradation could be used to improve the recovery of fermentable sugar for use in biorefineries. In this study, different fungal strains isolated from the Amazon rainforest were evaluated in terms of their ability to produce feruloyl esterase (FAE) and xylanase enzymes, and an assessment was made of the contributions of the enzymes in the hydrolysis of pretreated Sugarcane Bagasse. In the selection step, screening using plate assays was followed by shake flask submerged cultivations. After carbon source selection and cultivation in a stirred-tank bioreactor, Aspergillus oryzae P21C3 proved to be a promising strain for production of the enzymes. Supplementation of a commercial enzyme preparation with 30% (v/v) crude enzymatic complex from A. oryzae P21C3 increased the conversion of cellulose derived from pretreated Sugarcane Bagasse by 36%. Supplementation with FAE and xylanase enzymes produced on-site can therefore be used to improve the hydrolysis of Sugarcane Bagasse.
-
integrated strategies to enhance cellulolytic enzyme production using an instrumented bioreactor for solid state fermentation of Sugarcane Bagasse
Bioenergy Research, 2013Co-Authors: Sonia Couri, Ursula Fabiola Rodriguezzuniga, Victor Bertucci Neto, Silvio Crestana, Cristiane S. FarinasAbstract:The conversion of agro-industrial residues, such as Sugarcane Bagasse, into high-value products and renewable energy, within the biorefinery concept, is a potential alternative towards the sustainable management of these resources. This work evaluates the production of cellulolytic enzymes by a selected strain of Aspergillus niger cultivated in Sugarcane Bagasse under solid-state fermentation using an instrumented lab-scale bioreactor. The effects of environmental factors including the type of substrate and medium composition, as well as the operational conditions (air flow rate, inlet air relative humidity, and initial substrate moisture content) on the production of the enzymatic complex were evaluated using statistical design tools. Significant increases in FPase, endoglucanase, and xylanase activities were achieved under the optimized conditions predicted by the models, with values of 0.88, 21.77, and 143.85 IU/g of dry solid substrate, respectively, representing around ten-, four-, and twofold increases compared to the activities obtained under the initial growth conditions. This demonstrates the importance of evaluating environmental and operational criteria in order to achieve efficient enzyme production. The crude enzymatic extract obtained under optimized conditions was employed for enzymatic hydrolysis of pretreated Sugarcane Bagasse. Approximately 13 % of total reducing sugars, and a glucose concentration of 2.54 g/L, were obtained after 22 h of hydrolysis of steam exploded Sugarcane Bagasse, indicating that the enzymatic cocktail produced has good potential for use in the conversion of biomass.
Laurent Frederic Gil - One of the best experts on this subject based on the ideXlab platform.
-
adsorption of heavy metal ion from aqueous single metal solution by chemically modified Sugarcane Bagasse
Bioresource Technology, 2007Co-Authors: Osvaldo Karnitz, Vagner Roberto Botaro, Leandro Vinicius Alves Gurgel, Julio C P De Melo, Tânia Marcia Sacramento Melo, Rossimiriam Pereira De Freitas Gil, Laurent Frederic GilAbstract:Abstract This work describes the preparation of new chelating materials derived from Sugarcane Bagasse for adsorption of heavy metal ions in aqueous solution. The first part of this report deals with the chemical modification of Sugarcane Bagasse with succinic anhydride. The carboxylic acid functions introduced into the material were used to anchor polyamines, which resulted in two yet unpublished modified Sugarcane Bagasse materials. The obtained materials were characterized by elemental analysis and infrared spectroscopy (IR). The second part of this reports features the comparative evaluation of the adsorption capacity of the modified Sugarcane Bagasse materials for Cu2+, Cd2+, and Pb2+ ions in aqueous single metal solution by classical titration. Adsorption isotherms were studied by the Freundlich and Langmuir models.
Leandro Vinicius Alves Gurgel - One of the best experts on this subject based on the ideXlab platform.
-
adsorption of cu ii cd ii and pb ii from aqueous single metal solutions by Sugarcane Bagasse and mercerized Sugarcane Bagasse chemically modified with succinic anhydride
Carbohydrate Polymers, 2008Co-Authors: Leandro Vinicius Alves Gurgel, Rossimiriam Pereira De FreitasAbstract:This work describes the preparation of new chelating material from mercerized Sugarcane Bagasse. The first part treats the chemical modification of non-mercerized Sugarcane Bagasse (SCB) and twice-mercerized Sugarcane Bagasse (MMSCB) with succinic anhydride. Mass percent gains (mpg) and degrees of succinylation (DS) of succinylated non- and twice-mercerized Sugarcane Bagasse 1 (SCB 1 and MMSCB 1) were calculated. MMSCB 1 exhibited an increase in mpg and DS of 49.2% and 0.9 mmol/g in relation to SCB 1. SCB 2 and MMSCB 2 were obtained by treatment of MMSCB 1 and SCB 1 with bicarbonate solution to release the carboxylate functions and characterized by FTIR. The second part evaluates and compares the adsorption capacity of SCB 2 and MMSCB 2 for Cu 2+ ,C d 2+ and Pb 2+ ions in an aqueous single metal solution. Adsorption isotherms were developed using Langmuir model. MMSCB 2 exhibited an increase in Qmax for Cd 2+
-
adsorption of heavy metal ion from aqueous single metal solution by chemically modified Sugarcane Bagasse
Bioresource Technology, 2007Co-Authors: Osvaldo Karnitz, Vagner Roberto Botaro, Leandro Vinicius Alves Gurgel, Julio C P De Melo, Tânia Marcia Sacramento Melo, Rossimiriam Pereira De Freitas Gil, Laurent Frederic GilAbstract:Abstract This work describes the preparation of new chelating materials derived from Sugarcane Bagasse for adsorption of heavy metal ions in aqueous solution. The first part of this report deals with the chemical modification of Sugarcane Bagasse with succinic anhydride. The carboxylic acid functions introduced into the material were used to anchor polyamines, which resulted in two yet unpublished modified Sugarcane Bagasse materials. The obtained materials were characterized by elemental analysis and infrared spectroscopy (IR). The second part of this reports features the comparative evaluation of the adsorption capacity of the modified Sugarcane Bagasse materials for Cu2+, Cd2+, and Pb2+ ions in aqueous single metal solution by classical titration. Adsorption isotherms were studied by the Freundlich and Langmuir models.
Nandita Singh - One of the best experts on this subject based on the ideXlab platform.
-
influence of the application of Sugarcane Bagasse on lindane γ hch mobility through soil column implication for biotreatment
Bioresource Technology, 2008Co-Authors: Purushothaman Chirakkuzhyil Abhilash, Nandita SinghAbstract:Abstract In the present study we employed Sugarcane Bagasse for biotreatment of soil containing 50 mg kg −1 of lindane. Garden soil were treated with lindane and amended with varying concentrations of Sugarcane Bagasse (10%, 20%, 30%, 40% and 50%; w/w). Data on dissipation and degradation of lindane in soil columns (0–15, 15–30 cm) were studied at six consecutive samplings (0, 3, 7, 45 and 60 days). Treatment with 50% Sugarcane Bagasse resulted in >53% degradation of lindane in upper soil column with minimal leaching to lower soil column (0.002%) while highest leaching of lindane from upper soil column to lower soil column was occurred in garden soil (35.8%). Similarly, a substantial microbial biomass input has detected in amended soil than garden soil. Our results provide evidence that Sugarcane Bagasse can accelerate lindane degradation by enhanced microbial activity and prevent pesticide mobility through soil column by adsorption. Sugarcane Bagasse could be useful as cheaper, easy available alternative for the biotreatment of lindane impacted soil.
-
influence of the application of Sugarcane Bagasse on lindane gamma hch mobility through soil column implication for biotreatment
Bioresource Technology, 2008Co-Authors: Purushothaman Chirakkuzhyil Abhilash, Nandita SinghAbstract:In the present study we employed Sugarcane Bagasse for biotreatment of soil containing 50 mgkg(-1) of lindane. Garden soil were treated with lindane and amended with varying concentrations of Sugarcane Bagasse (10%, 20%, 30%, 40% and 50%; w/w). Data on dissipation and degradation of lindane in soil columns (0-15, 15-30cm) were studied at six consecutive samplings (0, 3, 7, 45 and 60 days). Treatment with 50% Sugarcane Bagasse resulted in >53% degradation of lindane in upper soil column with minimal leaching to lower soil column (0.002%) while highest leaching of lindane from upper soil column to lower soil column was occurred in garden soil (35.8%). Similarly, a substantial microbial biomass input has detected in amended soil than garden soil. Our results provide evidence that Sugarcane Bagasse can accelerate lindane degradation by enhanced microbial activity and prevent pesticide mobility through soil column by adsorption. Sugarcane Bagasse could be useful as cheaper, easy available alternative for the biotreatment of lindane impacted soil.
Andrew R Zimmerman - One of the best experts on this subject based on the ideXlab platform.
-
enhanced lead sorption by biochar derived from anaerobically digested Sugarcane Bagasse
Separation Science and Technology, 2011Co-Authors: Mandu Inyang, Wenchuan Ding, Pratap Pullammanappallil, Andrew R ZimmermanAbstract:This study examined the ability of two Sugarcane Bagasse biochars to remove lead from water. The sorption of lead by biochars made from raw (BC) and anaerobically digested Sugarcane Bagasse (DBC) was compared with a commercial activated carbon (AC) using batch sorption experiments. DBC was a more effective sorbent of lead from water than AC, and far more effective than BC. The maximum lead sorption capacity of DBC (653.9 mmol kg−1) was about double that of AC (395.3 mmol kg−1) and about twenty times higher than that of BC (31.3 mmol kg−1). Post-sorption characterizations using X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicated that the enhanced sorption of lead by DBC was at least partly related to a precipitation mechanism, while surface adsorption was the principal mechanism of sorption of lead onto BC. These results suggest that biochars made from Bagasse and other agricultural residues may be effective alternative, low-cost environmental sorbents of lead or other metals. In addit...
-
biochar from anaerobically digested Sugarcane Bagasse
Bioresource Technology, 2010Co-Authors: Mandu Inyang, Wenchuan Ding, Pratap Pullammanappallil, Andrew R ZimmermanAbstract:This study was designed to investigate the effect of anaerobic digestion on biochar produced from Sugarcane Bagasse. Sugarcane Bagasse was anaerobically digested to produce methane. The digested residue and fresh Bagasse was pyrolyzed separately into biochar at 600 °C in nitrogen environment. The digested Bagasse biochar (DBC) and undigested Bagasse biochar (BC) were characterized to determine their physicochemical properties. Although biochar was produced from the digested residue (18% by weight) and the raw Bagasse (23%) at a similar rate, there were many physiochemical differences between them. Compared to BC, DBC had higher pH, surface area, cation exchange capacity (CEC), anion exchange capacity (AEC), hydrophobicity and more negative surface charge, all properties that are generally desirable for soil amelioration, contaminant remediation or wastewater treatment. Thus, these results suggest that the pyrolysis of anaerobic digestion residues to produce biochar may be an economically and environmentally beneficial use of agricultural wastes.
