scholarly journals Lipid Production by <i>Rhodotorula glutinis</i> from Pulp and Paper Wastewater for Biodiesel Production

2015 ◽  
Vol 05 (03) ◽  
pp. 114-125 ◽  
Author(s):  
Marta Amirsadeghi ◽  
Sara Shields-Menard ◽  
W. Todd French ◽  
Rafael Hernandez
Keyword(s):  
Lipid Production ◽  
Rhodotorula Glutinis ◽  
Pulp And Paper ◽  
Biodiesel Production ◽  
Paper Wastewater

scholarly journals Screening of Industrial Wastewaters as Feedstock for the Microbial Production of Oils for Biodiesel Production and High-Quality Pigments

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Teresa Schneider ◽  
Simone Graeff-Hönninger ◽  
William Todd French ◽  
Rafael Hernandez ◽  
Wilhelm Claupein ◽  
...  
Keyword(s):  
Fruit Juice ◽  
Low Cost ◽  
Lipid Production ◽  
Rhodotorula Glutinis ◽  
Biodiesel Production ◽  
Carotenoid Content ◽  
Plant Oil ◽  
Available Nitrogen ◽  
Carotenoid Production ◽  
Economic Constraints

The production of biodiesel has notably increased over the past decade. Currently, plant oil is the main feedstock for biodiesel production, but, due to concerns related to the competition with food production, alternative oil feedstocks have to be found. Oleaginous yeasts are known to produce high amounts of lipids, but no integrated process from microbial fermentation to final biodiesel production has reached commercial realization yet due to economic constraints. Therefore, growth and lipid production of red yeastRhodotorula glutiniswas tested on low-cost substrates, namely, wastewaters from potato, fruit juice, and lettuce processing. Additionally, the production of carotenoids as high-value by-products was examined. All evaluated wastewaters met the general criteria for microbial lipid production. However, no significant increase in lipid content was observed, probably due to lack of available carbon in wastewaters from fruit juice and lettuce processing, and excess of available nitrogen in potato processing wastewater, respectively. During growth on wastewaters from fruit juice and lettuce processing the carotenoid content increased significantly in the first 48 hours. The relations between carbon content, nitrogen content, and carotenoid production need to be further assessed. For economic viability, lipid and carotenoid production needs to be increased significantly. The screening of feedstocks should be extended to other wastewaters.

Treatment of Model Pulp and Paper Wastewater by Electrocoagulation

2008 ◽  
Vol 23 (2) ◽  
pp. 450-460 ◽  
Author(s):  
Beata Załęska-Chróst ◽  
Lech Smoczyński ◽  
Regina Wardzyńska
Keyword(s):  
Pulp And Paper ◽  
Paper Wastewater

scholarly journals Characterization of efficient xylanases from industrial-scale pulp and paper wastewater treatment microbiota

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jia Wang ◽  
Jiawei Liang ◽  
Yonghong Li ◽  
Lingmin Tian ◽  
Yongjun Wei
Keyword(s):  
Wastewater Treatment ◽  
Xylanase Activity ◽  
Pulp And Paper ◽  
Optimal Conditions ◽  
Paper Wastewater ◽  
Termite Hindgut ◽  
Uncultured Microorganisms ◽  
Metagenomic Approach ◽  
Gh10 Family

AbstractXylanases are widely used enzymes in the food, textile, and paper industries. Most efficient xylanases have been identified from lignocellulose-degrading microbiota, such as the microbiota of the cow rumen and the termite hindgut. Xylanase genes from efficient pulp and paper wastewater treatment (PPWT) microbiota have been previously recovered by metagenomics, assigning most of the xylanase genes to the GH10 family. In this study, a total of 40 GH10 family xylanase genes derived from a certain PPWT microbiota were cloned and expressed in Escherichia coli BL21 (DE3). Among these xylanase genes, 14 showed xylanase activity on beechwood substrate. Two of these, PW-xyl9 and PW-xyl37, showed high activities, and were purified to evaluate their xylanase properties. Values of optimal pH and temperature for PW-xyl9 were pH 7 and 60 ℃, respectively, while those for PW-xyl37 were pH 7 and 55 ℃, respectively; their specific xylanase activities under optimal conditions were 470.1 U/mg protein and 113.7 U/mg protein, respectively. Furthermore, the Km values of PW-xyl9 and PW-xyl37 were determined as 8.02 and 18.8 g/L, respectively. The characterization of these two xylanases paves the way for potential application in future pulp and paper production and other industries, indicating that PPWT microbiota has been an undiscovered reservoir of efficient lignocellulase genes. This study demonstrates that a metagenomic approach has the potential to screen efficient xylanases of uncultured microorganisms from lignocellulose-degrading microbiota. In a similar way, other efficient lignocellulase genes might be identified from PPWT treatment microbiota in the future.

scholarly journals AOX removal from pulp and paper wastewater by Fenton and photo-Fenton processes: A real case-study

2020 ◽  
Vol 6 ◽  
pp. 770-775 ◽  
Author(s):  
J.P. Ribeiro ◽  
C.C. Marques ◽  
I. Portugal ◽  
M.I. Nunes
Keyword(s):  
Pulp And Paper ◽  
Real Case ◽  
Paper Wastewater ◽  
Aox Removal

The combined use of magnetic field and iron-based complex in advanced treatment of pulp and paper wastewater

2011 ◽  
Vol 178 ◽  
pp. 232-238 ◽  
Author(s):  
Bo Liu ◽  
Baoyu Gao ◽  
Xing Xu ◽  
Wei Hong ◽  
Qinyan Yue ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Pulp And Paper ◽  
Advanced Treatment ◽  
Combined Use ◽  
Paper Wastewater ◽  
Iron Based
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