scholarly journals Doehlert experimental design for the optimization of electrocoagulation treatment of landfill leachate

2021 ◽  
Vol 33 (1) ◽  
pp. 395-401
Author(s):  
Dorsaf Mansour ◽  
Walaa I. El-Sofany ◽  
Faiza.I.A. Abdella ◽  
Najat Masood ◽  
Abdulmohsen Khalaf Dhahi Alsukaibi ◽  
...  
Keyword(s):  
Experimental Design ◽  
Landfill Leachate ◽  
Doehlert Experimental Design

scholarly journals Ozonation Pretreatment for Reduction of Landfill Leachate Fouling on Membranes: A Response Surface Methodology Analysis

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 506
Author(s):  
Everton Gripa ◽  
Alyne M. Costa ◽  
Juacyara C. Campos ◽  
Fabiana V. da Fonseca
Keyword(s):  
Response Surface Methodology ◽  
Experimental Design ◽  
Response Surface ◽  
Reverse Osmosis ◽  
Organic Compounds ◽  
Landfill Leachate ◽  
Operational Conditions ◽  
Toxicity Factor ◽  
High Concentrations ◽  
Modified Fouling Index

Batch ozonation was performed to assess its efficacy as a pretreatment for reverse osmosis (RO) membranes for treating leachate with high concentrations of recalcitrant organic compounds. Leachate samples from two different landfills were collected and characterized. The modified fouling index (MFI) was used to estimate the fouling potential of raw and ozonized leachates. A response surface experimental design was applied to optimize operational pH and ozone dose. The results demonstrate that the best operational conditions are 1.5 g/L of O3 at pH 12.0 and 1.5 g/L of O3 at pH 9.0 for Landfills 1 and 2, which reduce MFI by 96.22% and 94.08%, respectively. Additionally, they show toxicity factor decays of 98.44% for Landfill 1 and 93.75% for Landfill 2. These results, along with the similar behavior shown by leachate samples from distinct landfills, suggest that ozonation is a promising technology to fit this kind of wastewater into the requirements of RO membranes, enabling their use in such treatment.

Application of Doehlert experimental design for the removal of radium from aqueous solution by cross-linked phenoxycalix[4]pyrrole-polymer using Ba(II) as a model

2019 ◽  
Vol 27 (4) ◽  
pp. 4325-4336
Author(s):  
Nancy AlHaddad ◽  
Radwan Sidaoui ◽  
Malek Tabbal ◽  
Ismail Abbas ◽  
Pierre-Edouard Danjou ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Experimental Design ◽  
Doehlert Experimental Design

Application of a Doehlert experimental design to the optimization of an Au?Co plating electrolyte

2004 ◽  
Vol 34 (11) ◽  
pp. 1177-1184 ◽  
Author(s):  
L. Chalumeau ◽  
M. Wery ◽  
H.F. Ayedi ◽  
M.M. Chabouni ◽  
C. Leclere
Keyword(s):  
Experimental Design ◽  
Doehlert Experimental Design

Optimisation of the Cooking Process of Sheanut Kernels (Vitellaria paradoxa Gaertn.) Using the Doehlert Experimental Design

2009 ◽  
Vol 5 (1) ◽  
pp. 108-117 ◽  
Author(s):  
Divine Nde Bup ◽  
Charles F. Abi ◽  
Dzudie Tenin ◽  
César Kapseu ◽  
Clergé Tchiegang
Keyword(s):  
Experimental Design ◽  
Vitellaria Paradoxa ◽  
Cooking Process ◽  
Doehlert Experimental Design

scholarly journals Application of Doehlert experimental design in the optimization of experimental variables for the Pseudozyma sp. (CCMB 306) and Pseudozyma sp. (CCMB 300) cell lysis

2012 ◽  
Vol 32 (4) ◽  
pp. 761-767 ◽  
Author(s):  
Amanda Reges de Sena ◽  
Gildomar Lima Valasques Júnior ◽  
Ingara Keisle São Paulo Barretto ◽  
Sandra Aparecida Assis
Keyword(s):  
Experimental Design ◽  
Cell Lysis ◽  
Lytic Enzyme ◽  
Enzymatic Extract ◽  
Moniliophthora Perniciosa ◽  
Doehlert Experimental Design ◽  
Biotechnology Products ◽  
Influence Of Ph

This study aimed to verify the influence of pH and temperature on the lysis of yeast using experimental design. In this study, the enzymatic extract containing β-1,3-glucanase and chitinase, obtained from the micro-organism Moniliophthora perniciosa, was used. The experiment showed that the best conditions for lysis of Pseudozyma sp. (CCMB 306) and Pseudozyma sp. (CCMB 300) by lytic enzyme were pH 4.9 at 37 ºC and pH 3.9 at 26.7 ºC, respectively. The lytic enzyme may be used for obtaining various biotechnology products from yeast.

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