Production of cellulolytic enzymes by Aspergillus fumigatus ABK9 in wheat bran-rice straw mixed substrate and use of cocktail enzymes for deinking of waste office paper pulp

2013 ◽  
Vol 128 ◽  
pp. 290-296 ◽  
Author(s):  
Arpan Das ◽  
Tanmay Paul ◽  
Suman K. Halder ◽  
Arijit Jana ◽  
Chiranjit Maity ◽  
...  
Keyword(s):  
Aspergillus Fumigatus ◽  
Rice Straw ◽  
Wheat Bran ◽  
Cellulolytic Enzymes ◽  
Paper Pulp ◽  
Mixed Substrate ◽  
Waste Office Paper ◽  
Office Paper

scholarly journals Generation of highly amenable cellulose-Iβ via selective delignification of rice straw using a reusable cyclic ether-assisted deep eutectic solvent system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chiranjeevi Thulluri ◽  
Ravi Balasubramaniam ◽  
Harshad Ravindra Velankar
Keyword(s):  
Enzymatic Hydrolysis ◽  
Rice Straw ◽  
Deep Eutectic Solvent ◽  
Solvent System ◽  
Cyclic Ether ◽  
Cellulolytic Enzymes ◽  
Ammonium Bromide ◽  
Selective Delignification ◽  
Cellulose Iβ ◽  
Hydrolysis Of

AbstractCellulolytic enzymes can readily access the cellulosic component of lignocellulosic biomass after the removal of lignin during biomass pretreatment. The enzymatic hydrolysis of cellulose is necessary for generating monomeric sugars, which are then fermented into ethanol. In our study, a combination of a deep eutectic (DE) mixture (of 2-aminoethanol and tetra-n-butyl ammonium bromide) and a cyclic ether (tetrahydrofuran) was used for selective delignification of rice straw (RS) under mild conditions (100 °C). Pretreatment with DE-THF solvent system caused ~ 46% delignification whereas cellulose (~ 91%) and hemicellulose (~ 67%) recoveries remained higher. The new solvent system could be reused upto 10 subsequent cycles with the same effectivity. Interestingly, the DE-THF pretreated cellulose showed remarkable enzymatic hydrolysability, despite an increase in its crystallinity to 72.3%. Contrary to conventional pretreatments, we report for the first time that the enzymatic hydrolysis of pretreated cellulose is enhanced by the removal of lignin during DE-THF pretreatment, notwithstanding an increase in its crystallinity. The current study paves way for the development of newer strategies for biomass depolymerization with DES based solvents.

Enhanced production of microbial lipids from waste office paper by the oleaginous yeast Cryptococcus curvatus

Fuel ◽  
2018 ◽  
Vol 217 ◽  
pp. 420-426 ◽  
Author(s):  
Neelamegam Annamalai ◽  
Nallusamy Sivakumar ◽  
Piotr Oleskowicz-Popiel
Keyword(s):  
Oleaginous Yeast ◽  
Microbial Lipids ◽  
Cryptococcus Curvatus ◽  
Enhanced Production ◽  
Waste Office Paper ◽  
Office Paper

scholarly journals Effects of composition, age and sterilization techniques of mother culture on the growth and yield of Volvariella volvacea (Bull.) Singer

2020 ◽  
Vol 49 (2) ◽  
pp. 387-393
Author(s):  
Nuhu Alam ◽  
Shailendra Mohon Singha
Keyword(s):  
Rice Straw ◽  
Wheat Bran ◽  
Research Work ◽  
Commercial Production ◽  
Hot Water ◽  
Growth And Yield ◽  
Rice Grain ◽  
Volvariella Volvacea ◽  
Biological Yield ◽  
The Impact

The research work was carried out to investigate the efficacy of different mother culture media viz., rice straw (T-1), rice straw and rice bran (T-2), rice husk (T-3), rice grain (T-4), maize grain (T-5), and rice straw and wheat bran (T-6) and the impact of age of mother culture and substrate sterilization techniques viz., sun dried for 8 hrs covering with transparent polythene (A-1), black polythene (A-2), blue polythene (A-3) sheet, autoclave for two hrs at 121°C (A-4), and hot water for one hr (A-5) for the commercial cultivation of Volvariella volvacea (Bull.) Singer. The maximum mycelium run rate and minimum days required for completing the mother culture were recorded in T-4. The lowest days required for primordial initiation (DRFPI) was 6 in T-1 and T-2, whereas highest DRFPI was recorded in T-3. The maximum (13.33) days required for first harvest (DRFFH) and lowest (109) number of effective fruiting bodies (NEFB) were recorded in T-3. The minimum (10.67 days) DRFFH was found in T-2 and maximum (239.30) NEFB was recorded in T-1. The lowest length and diameter (LFB and DFB) were recorded in T-5 (3.03 cm) and T-1 (1.66 cm), while highest LFB and DFB were observed in T-3 (3.20 and 2.39 cm). Maximum biological yield and efficiency were observed in rice straw and wheat bran materials. The highest NEFB, DFB, biological yield and efficiency were recorded in 30 days old of mother culture. The results revealed that combined rice straw and wheat bran were the excellent mother culture medium and 30 days old was the best age for the commercial production of paddy straw mushroom. Considering the experimental results on the sterilization techniques it may be suggested that hot water sterilization of rice straw substrate was the best sterilization technique for the commercial production and yield improvement of V. volvacea.

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