Date

4-2009

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Catalino G. Alfafara

Co-adviser

Veronica P. Migo

Abstract

Electrochemical treatment was employed to treat the Jatropha methyl ester processing wastewater mainly to reduce its COD. Electro-oxidation experiments on the raw wastewater at 2A showed a COD removal efficiency of only 25% in 15 hours.Further experiments were then conducted on the wastewater supplemented with artificial seawater (ASW) at varying proportions of 0.10%, 30% and 50% which could help generate more chlorine-based oxidants for oxidizing the COD in the wastewater. Increasing the operating current while proportionally the time achieved the same COD removal efficiency (all around 25%) by statistical analysis, Increasing the seawater amount also had no significant effect to the treatment for COD, OG and TSS. The maximum treatment efficiencies (due to electrolysis only) for 30.45% for COD (4A, 7.5h, 30%ASW), 96.95% for OG (2A, 15h, 30%ASW), and 95.24% for TSS(6A,5h 0%ASW) were achieved although none has satisfied the DENR standards.Charge dose was calculated for each seawater proportion. However it was found out to be inapplicable because of the unsatisfactory linear relationship between the mass of COD removed and the amount of charge used. Thus, the charge dose values obtained of COD removed and the amount of charge used. Thus, the charge dose values obtained were not used to evaluate the energy requirement and energy cost. Since electrolysis was not able to bring down the COD, OG and TSS to satisfy DENR standards, other modifications on the process should be tried. Results indicate that the organic matter in Jatropha wastewater may have a very recalcitrant nature and the electrochemical oxidizing agents generated during electrolysis may not be sufficient to effectively remove its COD to a level that is complaint with DENR standards.

Language

English

LC Subject

Jatropha ; Biomass energy ; Water--Analysis ; Electrochemistry

Call Number

LG 993.5 2009 E62 A53

Document Type

Thesis

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