Microwave Curing and Drying of Cellular Concrete

1992 ◽  
Vol 269 ◽  
Author(s):  
Walter M. van Loock
Keyword(s):  
Production Process ◽  
Feasibility Study ◽  
Building Material ◽  
Large Scale ◽  
Scale Production ◽  
Volumetric Heating ◽  
Microwave Curing ◽  
Thermal Insulator ◽  
Large Scale Production ◽  
Cellular Concrete

ABSTRACTTraditionally the heating and curing of cellular concrete takes place in an autoclave. This building material is a thermal insulator so the curing and drying processes are energy and time consuming. Volumetric heating is an attractive method for improving the throughputs.A feasibility study leads to the conclusion that microwave processing is not likely to be applied in a large scale production process.

The Research of Production Process Statistical Steady-State Based on the Hypothesis Test

2011 ◽  
Vol 314-316 ◽  
pp. 2433-2438
Author(s):  
Wei Zhi Wang
Keyword(s):  
Quality Control ◽  
Steady State ◽  
Production Process ◽  
Quantitative Method ◽  
Large Scale ◽  
Hypothesis Test ◽  
Influence Factors ◽  
Normal Operation ◽  
Scale Production ◽  
Large Scale Production

By only applying a after the event exam in the quality control of the batch production is not enough to meet the needs of modern large-scale production. To a certain extent, modern quality control is a dynamic process of the steady-state judge and adjustment. A simple and reliable steady-state judge rule and method is the premise to guarantee the normal operation. This paper provides a quantitative method to evaluate production process steady-state by analyzing influence factors based on mathematical statistics. The method is both suitable for simple production process and complex production process with sub-processes.

scholarly journals Foaming of rhamnolipids fermentation: impact factors and fermentation strategies

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Zhijin Gong ◽  
Ge Yang ◽  
Chengchuan Che ◽  
Jinfeng Liu ◽  
Meiru Si ◽  
...  
Keyword(s):  
Production Process ◽  
Large Scale ◽  
Commercial Production ◽  
Impact Factors ◽  
Scale Production ◽  
Large Scale Production ◽  
Foaming Behavior ◽  
Production Strategies ◽  
Potential Applications ◽  
And Control

AbstractRhamnolipids have recently attracted considerable attentions because of their excellent biosurfactant performance and potential applications in agriculture, environment, biomedicine, etc., but severe foaming causes the high cost of production, restraining their commercial production and applications. To reduce or eliminate the foaming, numerous explorations have been focused on foaming factors and fermentation strategies, but a systematic summary and discussion are still lacking. Additionally, although these studies have not broken through the bottleneck of foaming, they are conducive to understanding the foaming mechanism and developing more effective rhamnolipids production strategies. Therefore, this review focuses on the effects of fermentation components and control conditions on foaming behavior and fermentation strategies responded to the severe foaming in rhamnolipids fermentation and systematically summarizes 6 impact factors and 9 fermentation strategies. Furthermore, the potentialities of 9 fermentation strategies for large-scale production are discussed and some further strategies are suggested. We hope this review can further facilitate the understanding of foaming factors and fermentation strategies as well as conducive to developing the more effective large-scale production strategies to accelerate the commercial production process of rhamnolipids.

Kinetic Models of Hydrogen Production Process by Batch Anaerobic Fermentation from Contained Sugar Wastewater

2013 ◽  
Vol 634-638 ◽  
pp. 981-986
Author(s):  
Dong Gou Sun ◽  
Bing Huang ◽  
Wen Gang Zuo ◽  
Huai Yuan Zhao ◽  
Wen Wei ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Production Process ◽  
Kinetic Models ◽  
Large Scale ◽  
Anaerobic Fermentation ◽  
Scale Production ◽  
Hydrogen Yield ◽  
Large Scale Production ◽  
The Relationship ◽  
Kinetics Of

The processes of biomass growth, hydrogen production and sucrose degradation were systemically investigated about batch anaerobic fermentation which is based on activated sludge for a basic strain and the simulating sucrose wastewater for a substrate. The kinetics of microbial growth, hydrogen production and sucrose degradation were proposed according to the Compertz equation and the Luedeking-Piret equation. The relationship between the biomass, hydrogen and substrate were also evaluated. The results shown that the hydrogen is a main produce of the formation process which is a growth-associated, a high biomass is favorable to increasing the hydrogen yield and shortening lag time. The three kinetic models equation have a good coincidence with the experimental data, and can really reflect the hydrogen production process from wastewater contained sucrose. The results will provide helpful reference for the large-scale production and theory study of hydrogen production.

scholarly journals A Novel Approach Using Conventional Methodologies to Scale up BNC Production Using Komagataeibacter medellinensis and Rotten Banana Waste as Alternative

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1469
Author(s):  
Carlos Molina-Ramírez ◽  
Juan Álvarez ◽  
Robin Zuluaga ◽  
Cristina Castro ◽  
Piedad Gañán
Keyword(s):  
Production Process ◽  
Large Scale ◽  
Culture Medium ◽  
Scale Up ◽  
Glucose Consumption ◽  
Human Consumption ◽  
Scale Production ◽  
Bacterial Nanocellulose ◽  
Large Scale Production ◽  
Glucose Diffusion

Currently, cellulose nanostructures are among the most promising structures, and extensive work in materials and biotechnology industries is aimed at identifying an efficient process of production. Even when production at the laboratory scale is successful, crucial aspects of increased commercial applications for cellulose nanostructures are linked to large-scale production. Large-scale production requires a balance between the cost of the culture medium and product value. Therefore, in this work, for the optimization and scaling up of bacterial nanocellulose, a culture medium consisting of rotten banana unsuitable for human consumption was used for the first time as an inexpensive feedstock. Initially, the bacterial nanocellulose (BNC) culture medium conditions were optimized, and it was established that a glucose concentration of 26.4 g/L and a V/A ratio of 2.2 cm were the optimal conditions for production reaching a BNC yield of 5 g/L, which was 42.4% higher than the best result initially obtained. Finally, the scale-up process was performed, implementing a regime analysis methodology by comparing the characteristic times of the critical mechanisms involved in BNC production, namely, microbial growth, glucose consumption, BNC production, and glucose diffusion into the BNC membrane, as the first approach for this type of BNC production process. The mechanism underlying the BNC production process is glucose diffusion into the BNC membrane (characteristic time, 675.47 h). Thus, the V/A ratio was selected as the scale-up criterion most suitable for producing BNC under static culture conditions, allowing the production of 16 g of BNC after 12 d of fermentation in a plastic bioreactor, which was 3378% higher than that produced in glass vessels. The results obtained in this study may initiate further improvements in BNC commercial production by exploiting different feedstocks.

scholarly journals Carbon-Based Electrode for Perovskite Solar Cells

2021 ◽  
Author(s):  
Meidan Que ◽  
Boyue Zhang ◽  
Jin Chen ◽  
Xingtian Yin ◽  
Sining Yun
Keyword(s):  
Solar Cells ◽  
Production Process ◽  
High Stability ◽  
Large Scale ◽  
Perovskite Solar Cells ◽  
Cost Effective ◽  
Scale Production ◽  
Large Scale Production ◽  
The Cost ◽  
Carbon Based

The cost-effective processability and high stability of carbon-based perovskite solar cells (C-PSCs) have shown a tremendous potential to positively devote to the development of large-scale production process. However, prior to...

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