Date

4-2009

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Monet Conception C. Maguyon

Committee Member

Catalino G. Alfafara, Amelia E. Parao

Abstract

Electrolytic removal of pollutants from dairy processing wastewater such as Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), and color was conducted in a batch using electro-oxidation. Salt was also supplemented for other batch electrolysis systems. Removal efficiencies for COD, TSS and color were determined to assess the technical feasibility of electro-oxidation process. The effects of operating current and salt concentration were also determined. Secondary effects such as pH and temperature were also monitored. A higher operating current resulted in higher removal efficiency and faster rate of removal due to its higher oxidizing power. Salt supplementation enhanced the electrolytic system by increasing the conductivity of the electrolytes.Electro-oxidation at 7A with 7% (w/v) salt addition was able to remove 76.21% COD and 97.83% color. TSS removal, however, was only about 51.99%. No significant effect from varying salt concentration was observed for COD removal while increasing the salt concentration increased the rate of color removal. Based on the obtained experimental data, charge dose, energy requirement and energy cost were calculated. Due to poor linearity of plots for TSS and color, charge dose for COD removal was used. Charge dose was computed to be about 11.97 coulombs/mg COD removed and energy requirement was in the range of 1.312x10⁻⁵ kWh/mg COD removed. The maximum energy cost was estimated to be about 5661.61PhP/m³.

Language

English

LC Subject

Dairy wastewater, Electro-oxidation process

Call Number

LG 993.5 2009 E62 C78

Document Type

Thesis

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