Pyrolysis of waste milk packets in a screw‐type continuous reactor: Optimization through response surface methodology and products characterization

2020 ◽  
Vol 39 (4) ◽  
Author(s):  
Sadiya Almas ◽  
Navneeta Lal ◽  
Anil Kumar Varma ◽  
Lokendra Singh Thakur ◽  
Prasenjit Mondal
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Continuous Reactor ◽  
Reactor Optimization ◽  
Waste Milk

Protein and Sugar Extraction from Rice Bran and De-Oiled Rice Bran using Subcritical Water in a Semi-Continuous Reactor: Optimization by Response Surface Methodology

2012 ◽  
Vol 8 (3) ◽  
Author(s):  
Sasithorn Sunphorka ◽  
Warinthorn Chavasiri ◽  
Yoshito Oshima ◽  
Somkiat Ngamprasertsith
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Rice Bran ◽  
Subcritical Water ◽  
Extraction Process ◽  
Continuous Reactor ◽  
Optimum Conditions ◽  
Reactor Optimization ◽  
Contour Plots ◽  
Main Factors

Abstract The extraction of protein and sugar from rice bran and de-oiled rice bran using subcritical water was evaluated in a 30-ml semi-continuous reactor. The effects of the three main factors, operating temperature, time and pressure, on the total sugar and protein yields obtained were investigated using analysis of variance and response surface methodology. A central composite design was performed in order to determine the most likely optimum conditions for the extraction process for both substrates individually and together. The developed models had a very high regression coefficient (R2) value (0.94 – 0.98), and demonstrated that the three main factors investigated had a significant effect on the sugar yield, whilst only time and its interaction with temperature were significant factors controlling the extracted protein yield. Based on the response surface and contour plots, the optimum conditions were evaluated for maximal extracted sugar and protein yields, which reached 100% for protein, from the two materials.

Electrochemical oxidation of landfill leachate in a flow reactor: optimization using response surface methodology

2014 ◽  
Vol 22 (8) ◽  
pp. 5831-5841 ◽  
Author(s):  
Jefferson E. Silveira ◽  
Juan A. Zazo ◽  
Gema Pliego ◽  
Edério D. Bidóia ◽  
Peterson B. Moraes
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Electrochemical Oxidation ◽  
Landfill Leachate ◽  
Flow Reactor ◽  
Reactor Optimization

scholarly journals Simultaneous removal of Cd2+ and Zn2+ from aqueous solution using an upflow Al-electrocoagulation reactor: optimization by response surface methodology

2019 ◽  
Vol 79 (7) ◽  
pp. 1297-1308
Author(s):  
Vianey Ariadna Burboa-Charis ◽  
Eddy Jonatan Moreno-Román ◽  
Juan Antonio Vidales Contreras ◽  
Celestino García-Gómez
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Aqueous Media ◽  
Ion Concentration ◽  
Current Intensity ◽  
Fluid Distribution ◽  
Electrolysis Time ◽  
Reactor Optimization ◽  
Electrocoagulation Process ◽  
Positive Effect

Abstract The presence of heavy metals in the environment has increased, and cadmium (Cd) and zinc (Zn) are considered to be among the most dangerous. An upflow Al-electrocoagulation reactor was used to remove Cd2+ and Zn2+ ions from aqueous media. The system consisted of perforated aluminum circular electrodes for fluid distribution with elimination of external agitation. The effect of different parameters, i.e. current intensity, electrolysis time, concentration of Cd2+ and Zn2+ ions and electrolytic support dose were optimized by response surface methodology. The results indicated that increasing the current intensity and the electrolysis time had a positive effect on the elimination efficiency of the pollutant ions. Likewise, increasing the dose of electrolytic support and decreasing the concentration of the pollutants improved the efficiency of the system. The optimal results were: current intensity of 0.4 A, electrolysis time of 40 min, ion concentration of 44.6 mg·L−1 and electrolytic support dose of 0.56 mg·L−1, with the maximum elimination percentages of 96 ± 3.8% and 96 ± 2.7% for Cd2+ and Zn2+, respectively. This study showed that the electrocoagulation process in an upflow electrocoagulation reactor could be successfully applied to remove pollutants from water.

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