scholarly journals Pure Hydrolyzable Cellulose from Rice Straw, Wheat Straw and Sugarcane Bagasse by a Simple Scalable Two-Step Treatment

2021 ◽  
pp. 1-20
Author(s):  
Asodekar Bhupal Ravindra ◽  
Wadekar Prathamesh Chandrashekhar ◽  
Patil Parmeshwar Shivajirao ◽  
Patil Mallikarjun Laxmiputra ◽  
Lali Mallinath Arvind
Keyword(s):  
Wheat Straw ◽  
Rice Straw ◽  
Sugarcane Bagasse ◽  
Alkali Treatment ◽  
Cost Effective ◽  
Batch Process ◽  
Renewable Chemicals ◽  
Pure Cellulose ◽  
Biomass Components ◽  
Yield Formation

Utilization of amply available lignocellulosic biomass for a cost-effective conversion to renewable chemicals has proven more difficult than anticipated. Sustainable and viable fractionation of any biomass to its individual monomeric components for their further conversion to products at commercial scale therefore remains elusive. A rapid and scalable multi-step pretreatment strategy for fractionation of rice straw using a combination of dilute aqueous acid and aqueous alkali treatment steps under subcritical conditions was investigated. The process steps and parameters were optimized for yield and purity of the resulting biomass components. Effects of acid and alkali concentrations on the fractionation efficiency were studied in the range of 0.2% to 12% w/v at temperatures ranging from 110°C to 200°C for time spanning from 15 to 30 min. The simple optimum sequence of operations and conditions was found to be a diluteacid hydrolysis step at 130°C for 15 min with 2% HNO3 followed by the second treatment step at 130°C for 15 min with 2% NaOH. This combination gave 90% pure cellulose in more than 80% overall yield. Formation of furfurals in the hydrolysate was prevented significantly, and the cellulose obtained showed good amenability for enzymatic hydrolysis to sugars. The same process was applied to wheat straw and sugarcane bagasse, and the obtained results were found to be similar to those obtained for rice straw. The process was successfully scaled up to 50 L batch process with negligible deviations from smaller scale run results.

Lignocellulose-degrading enzyme production by Pleurotus sapidus WC 529 and its application in lignin degradation / Lignoselüloz-çözücü enzim üretiminde Pleurotus sapidus WC 529 ve lignin parçalanmasındaki uygulamaları

2016 ◽  
Vol 41 (1) ◽  
Author(s):  
Muhammad Asgher ◽  
Amna Ijaz ◽  
Muhammad Bilal
Keyword(s):  
Wheat Straw ◽  
Rice Straw ◽  
Sugarcane Bagasse ◽  
Enzyme Production ◽  
Large Scale ◽  
Hydrolytic Enzymes ◽  
Cost Effective ◽  
Lignocellulolytic Enzymes ◽  
Corn Cobs ◽  
Pleurotus Sapidus

AbstractObjective: Cost-effective production of industrially important enzymes is a key for their successful utilization on large scale. Present study was conducted to appraise Pleurotus sapidus WC 529 potential to produce oxidative (lignin peroxidase, manganese peroxidase, laccase) and hydrolytic (endoglucanase, exoglucanase and β-glucosidase) enzymes, grown on wheat straw, corn cobs, corn stover, rice straw, banana stalk and sugarcane bagasse in solid state fermentation (SSF) process. The crude extract thus produced was used for the delignification of various agro-industrial residues.Methods: Different agricultural wastes were assessed for lignocellulolytic enzymes production. The process parameters were optimized through response surface methodology (RSM) with central composite design (CCD) for maximum enzyme production.Results: P. sapidus secreted lower levels of hydrolytic enzymes but expressed high laccase, MnP and LiP activities in SSF (228.25, 153.45 and 59.20 UmL-1 respectively) of banana stalk. The optimal conditions for yielding highest enzyme activities were: initial pH, 4; temperature, 35°C; moisture level, 60%; inoculum size, 4 mL, and incubation time, 120 h. The enzyme extract removed 56.54, 51.08, 65.81 and 57.4% lignin from rice straw, sugarcane bagasse, corn cobs and wheat straw, respectively, after 48 h at 35°C.Conclusion: High ligninolytic activities were obtained in SSF of banana stalk by P. sapidus. The enzyme production was considerably improved by optimization through RSM. The results suggest that lignocellulolytic enzymes could be produced using cost-effective carbon sources and implicated to digest lignocellulosic biomass.

scholarly journals Effects of Rice Straw Powder (RSP) Size and Pretreatment on Properties of FDM 3D-Printed RSP/Poly(Lactic Acid) Biocomposites

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3234
Author(s):  
Wangwang Yu ◽  
Lili Dong ◽  
Wen Lei ◽  
Yuhan Zhou ◽  
Yongzhe Pu ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Rice Straw ◽  
Fused Deposition Modeling ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Cost Effective ◽  
Poly Lactic Acid ◽  
Fused Deposition ◽  
Interfacial Compatibility ◽  
3D Printed

To develop a new kind of environment-friendly composite filament for fused deposition modeling (FDM) 3D printing, rice straw powder (RSP)/poly(lactic acid) (PLA) biocomposites were FDM-3D-printed, and the effects of the particle size and pretreatment of RSP on the properties of RSP/PLA biocomposites were investigated. The results indicated that the 120-mesh RSP/PLA biocomposites (named 120#RSP/PLA) showed better performance than RSP/PLA biocomposites prepared with other RSP sizes. Infrared results showed that pretreatment of RSP by different methods was successful, and scanning electron microscopy indicated that composites prepared after pretreatment exhibited good interfacial compatibility due to a preferable binding force between fiber and matrix. When RSP was synergistically pretreated by alkaline and ultrasound, the composite exhibited a high tensile strength, tensile modulus, flexural strength, and flexural modulus of 58.59, 568.68, 90.32, and 3218.12 MPa, respectively, reflecting an increase of 31.19%, 16.48%, 18.75%, and 25.27%, respectively, compared with unmodified 120#RSP/PLA. Pretreatment of RSP also improved the thermal stability and hydrophobic properties, while reducing the water absorption of 120#RSP/PLA. This work is believed to provide highlights of the development of cost-effective biocomposite filaments and improvement of the properties of FDM parts.

Two-step acid and alkaline ethanolysis/alkaline peroxide fractionation of sugarcane bagasse and rice straw for production of polylactic acid precursor

2014 ◽  
Vol 85 ◽  
pp. 49-62 ◽  
Author(s):  
Chularat Sakdaronnarong ◽  
Nattawee Srimarut ◽  
Nawapol Lucknakhul ◽  
Norased Na-songkla ◽  
Woranart Jonglertjunya
Keyword(s):  
Polylactic Acid ◽  
Rice Straw ◽  
Sugarcane Bagasse ◽  
Alkaline Peroxide ◽  
Acid Precursor

Review on fermentative biohydrogen production from water hyacinth, wheat straw and rice straw with focus on recent perspectives

2017 ◽  
Vol 42 (33) ◽  
pp. 20955-20969 ◽  
Author(s):  
Shahabaldin Rezania ◽  
Mohd Fadhil Md Din ◽  
Shazwin Mat Taib ◽  
Johan Sohaili ◽  
Shreeshivadasan Chelliapan ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Rice Straw ◽  
Water Hyacinth ◽  
Biohydrogen Production

scholarly journals Alkali treatment of fungal pretreated wheat straw for bioethanol production

Bioethanol ◽  
2016 ◽  
Vol 2 (1) ◽  
Author(s):  
María García-Torreiro ◽  
Miguel Álvarez Pallín ◽  
María López-Abelairas ◽  
Thelmo A. Lu-Chau ◽  
Juan M. Lema
Keyword(s):  
Wheat Straw ◽  
Alkali Treatment ◽  
Alkaline Treatment ◽  
White Rot ◽  
White Rot Fungus ◽  
Process Conditions ◽  
Alkali Pretreatment ◽  
Irpex Lacteus ◽  
C 30 ◽  
Pretreated Wheat Straw

AbstractBioconversion of lignocellulosic materials into ethanol requires an intermediate pretreatment step for conditioning biomass. Sugar yields from wheat straw were previously improved by the addition of a mild alkali pretreatment step before bioconversion by the white-rot fungus Irpex lacteus. In this work, an alternative alkaline treatment, which significantly reduces water consumption, was implemented and optimized. Sugar recovery increased 117% with respect to the previously developed alkaline wash process at optimal process conditions (30°C, 30 minutes and 35.7% (w/w) of NaOH). In order to further reduce operational costs, a system for alkali recycling was implemented. This resulted in the treatment of 150% more wheat straw using the same amount of NaOH. Finally, enzymatic hydrolysis was optimized and resulted in a reduction of enzyme dose of 33%.

scholarly journals Lignocellulose pretreatment technologies affect the level of enzymatic cellulose oxidation by LPMO

2015 ◽  
Vol 17 (5) ◽  
pp. 2896-2903 ◽  
Author(s):  
Ursula Fabiola Rodríguez-Zúñiga ◽  
David Cannella ◽  
Roberto de Campos Giordano ◽  
Raquel de Lima Camargo Giordano ◽  
Henning Jørgensen ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Corn Stover ◽  
Sugarcane Bagasse ◽  
Cellulosic Ethanol ◽  
Cellulose Oxidation ◽  
Available Resources

Sugarcane bagasse, corn stover, and wheat straw are among the most available resources for the production of cellulosic ethanol.

scholarly journals Evaluation of Organic and Inorganic Mulching as an Integrated Weed Management Strategy in Maize Under Rainfed Conditions

2018 ◽  
Vol 36 ◽  
Author(s):  
T. MEHMOOD ◽  
S.U. KHAN ◽  
A. QAYYUM ◽  
A.R. GURMANI ◽  
W. AHMED ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Rice Straw ◽  
Insect Pests ◽  
Weed Suppression ◽  
Plastic Mulch ◽  
Test Species ◽  
Weed Density ◽  
Straw Mulch ◽  
Dry Biomass ◽  
Black Plastic

ABSTRACT: Weeds affect crop growth, health and yield by competing for resources, and they serve as refuge for insect pests. Mulches of different materials have been found to control weeds and insect pests. A field study was conducted at the village of Mang, Haripur, Khyber Pakhtunkhwa, Pakistan, to explore the effect of various mulch materials on weed suppression in maize fields under rain-fed conditions in 2013. Eight mulch materials treatments were used: control (no mulching), wheat straw mulch, dry leaves of eucalyptus, rice straw mulch, grass clippings, living mulch (soybean crop), black plastic mulch and the herbicide Primextra were investigated under a randomized complete block design with four replications. Statistical analysis of data showed maximum reduction in weed density, relative weed density, fresh biomass and dry biomass in all the test species at 25, 50 and 75 days after sowing (DAS) where Primextra and black plastic mulch were used, and this was statistically similar to where rice straw and wheat straw were used. Maximum weed density, relative weed density, fresh and dry biomass of all weed species were recorded where soybean was intercropped with maize and grass clippings were used. Based on these results, it was inferred that the mulch material of eucalyptus and rice straw can effectively be used for controlling weeds in maize fields under rain-fed conditions.

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