A comparison of central composite design and Taguchi method for optimizing Fenton process.

Area of Science:

• Environmental Chemistry
• Chemical Engineering

Background:

• Fenton oxidation is a critical process for treating industrial wastewater.
• Optimizing reaction parameters is essential for efficient dye decolorization and chemical oxygen demand (COD) removal.

Purpose of the Study:

• To compare the efficacy of Central Composite Design (CCD) and the Taguchi method for optimizing Fenton oxidation.
• To identify the most significant operating parameters influencing dye decolorization and COD removal.

Main Methods:

• Experimental design using L9 orthogonal array (Taguchi method) and face-centered CCD.
• Analysis of control variables: initial dye concentration, Dye:Fe(+2), H2O2:Fe(+2), and pH.
• Evaluation of responses: COD and decolorization efficiency.

Main Results:

• Both CCD and Taguchi methods showed statistically significant models with high R-squared values (0.97 and 0.95, respectively).
• Optimal conditions yielded 99% decolorization and 80% COD removal.
• The Taguchi method identified pH as the most significant factor (87.62% contribution).

Conclusions:

• The Taguchi method is a cost-effective and efficient alternative to CCD for optimizing chemical engineering processes.
• Taguchi method's ability to rank input variables simplifies process optimization.
• pH is the dominant factor in achieving high decolorization and COD removal in Fenton oxidation.