Electrochemical treatment of salted whey effluent for reduction of chemical oxygen demand (COD) and turbidity

Date

6-2015

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Catalino G. Alfafara

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

The treatment of salted whey effluent by electrochemical oxidation (through the electrochemical generation of oxidants from naturally present chloride ions) was investigated for the removal of chemical oxygen demand (COD) and turbidity. The COD and turbidity reduction performance were explored at different levels of initial operating current density using a general factorial design. Increasing COD reduction efficiency and initial rate of COD removal were observed with increasing current density. Highest COD removal efficiency and initial removal rate achieved at 1,600 A/m² were found to be 55.26±11.70% and 189.62±96.71ppm/min, respectively, after 8 hours of electrolysis. In terms of turbidity reduction performance, 82.86±6.01% reduction was observed for all levels of initial operating current density. The charge dose (per unit area of electrode) was calculated as 3,125.4/m²mg COD removed. Due to the extremely high strength of the wastewater, longer electrolysis would be needed if it is used as a single-stage treatment. Also, the treatment cost was expected to be Php 266.67 per kilogram COD removed. Practical application of electrooxidation of salted whey effluent may be achieved when it is employed as a pretreatment method prior to second-stage treatment.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2015 E62 /D47

Document Type

Thesis

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