Grace and Braskem to produce green chemicals

2012 ◽  
Vol 2012 (8) ◽  
pp. 4
Keyword(s):  
Green Chemicals

scholarly journals Co-Management of Sewage Sludge and Other Organic Wastes: A Scandinavian Case Study

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3411
Author(s):  
Clara Fernando-Foncillas ◽  
Maria M. Estevez ◽  
Hinrich Uellendahl ◽  
Cristiano Varrone
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Resource Recovery ◽  
Organic Wastes ◽  
Industrial Wastes ◽  
Wastewater Management ◽  
Sewage Sludge Management ◽  
The Common ◽  
Green Chemicals

Wastewater and sewage sludge contain organic matter that can be valorized through conversion into energy and/or green chemicals. Moreover, resource recovery from these wastes has become the new focus of wastewater management, to develop more sustainable processes in a circular economy approach. The aim of this review was to analyze current sewage sludge management systems in Scandinavia with respect to resource recovery, in combination with other organic wastes. As anaerobic digestion (AD) was found to be the common sludge treatment approach in Scandinavia, different available organic municipal and industrial wastes were identified and compared, to evaluate the potential for expanding the resource recovery by anaerobic co-digestion. Additionally, a full-scale case study of co-digestion, as strategy for optimization of the anaerobic digestion treatment, was presented for each country, together with advanced biorefinery approaches to wastewater treatment and resource recovery.

scholarly journals Contemporaneous Production of Amylase and Protease through CCD Response Surface Methodology by Newly Isolated Bacillus megaterium Strain B69

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Rajshree Saxena ◽  
Rajni Singh
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Bacillus Megaterium ◽  
High Accuracy ◽  
Mass Scale ◽  
World Population ◽  
Oilseed Cake ◽  
Basal Media ◽  
Green Chemicals ◽  
Agroindustrial Wastes

The enormous increase in world population has resulted in generation of million tons of agricultural wastes. Biotechnological process for production of green chemicals, namely, enzymes, provides the best utilization of these otherwise unutilized wastes. The present study elaborates concomitant production of protease and amylase in solid state fermentation (SSF) by a newly isolated Bacillus megaterium B69, using agroindustrial wastes. Two-level statistical model employing Plackett-Burman and response surface methodology was designed for optimization of various physicochemical conditions affecting the production of two enzymes concomitantly. The studies revealed that the new strain concomitantly produced 1242 U/g of protease and 1666.6 U/g of amylase by best utilizing mustard oilseed cake as the substrate at 20% substrate concentration and 45% moisture content after 84 h of incubation. An increase of 2.95- and 2.04-fold from basal media was observed in protease and amylase production, respectively. ANOVA of both the design models showed high accuracy of the polynomial model with significant similarities between the predicted and the observed results. The model stood accurate at the bench level validation, suggesting that the design model could be used for multienzyme production at mass scale.

Pressure and time effect over semi-continuous gasification of zootechnical sludge near critical condition of water for green chemicals production

Fuel ◽  
2014 ◽  
Vol 136 ◽  
pp. 172-176 ◽  
Author(s):  
A. Molino ◽  
F. Nanna ◽  
A. Villone ◽  
P. Iovane ◽  
P. Tarquini ◽  
...  
Keyword(s):  
Critical Condition ◽  
Time Effect ◽  
Green Chemicals

Bio-chemicals from lignocellulose feedstock: sustainability, LCA and the green conundrum

2016 ◽  
Vol 18 (7) ◽  
pp. 1912-1922 ◽  
Author(s):  
H. H. Khoo ◽  
W. L. Ee ◽  
Valerio Isoni
Keyword(s):  
Environmental Sustainability ◽  
Lignocellulose Feedstock ◽  
Green Chemicals

This article discusses the environmental sustainability of bio-based or green chemicals and highlights various factors determining their “level of greenness”.

Green Chemicals Opportunity for Water Treatment Process Steam EOR: Case Study

2009 ◽  
Author(s):  
A. Nengkoda ◽  
A. Busaidy ◽  
A. Alawi ◽  
M. Johnson ◽  
R. Pahnke ◽  
...  
Keyword(s):  
Water Treatment ◽  
Treatment Process ◽  
Water Treatment Process ◽  
Green Chemicals
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