Date

4-2009

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Monet Concepcion C. Maguyon

Committee Member

Catalino G. Alfafara, Amelia E. Parao

Abstract

Electrolytic removal of Chemical Oxygen Demand (COD), Total Suspended Solids (TSS) and color from dairy processing wastewater was conducted in a batch system using electroflocculation. The effect of operating current, operating time, and salt supplementation of the electrolytic process was investigated. Removal efficiencies of pollutants were determined to evaluate different operating conditions. Secondary effects such ads pH and temperature were also monitored. A higher operating current resulted in higher removal efficiency and faster rate of removal due to higher production of flocculants and flocculating agents. Salt supplementation enhanced the process by increasing the conductivity of the electrolytes. Electroflocculation at 5A with 5% (w/v) salt supplementation was able to remove 66.53% TSS and 99.08% color. However, COD removal was only 54.22%. Based on statistical analysis, no significant effect from varying the amount of current was observed for COD, TSS and color removal. Based on the obtained experimental data, charge dose, energy requirement and energy cost were calculated. The charge dose for COD, TSS and color removal of the 10% salt supplementation showed lower results. For practical applications, the largest value of charge dose from the 10% salt supplementation, which is for TSS removal, may be used. Charge dose was computed to be about 35.370 coulombs/mg COD removed and the corresponding energy requirement was about 3.33068 x 10⁻⁵ kWh/mg COD removed. The maximum energy cost was estimated to be about 1,175.06 PhP/m³.

Language

English

LC Subject

Electroflocculation, Land treatment of wastewater

Call Number

LG 993.5 2009 E62 A76

Document Type

Thesis

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