Anaerobic treatability of wastewater generated from the Sodium Hydroxide-Neutralization of Jatropha curcas L. oil

Date

4-2009

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Jovita L. Movillon

Committee Member

Jerico R. Aguila, Amelia E. Parao

Abstract

The wastewater generated from the NaOH-neutralization of Jatrophga curcas L. oil initially had COD and BOD values of 2661mg/L and 564.88mg/L, respectively. The anaerobic bacteria from rumen liquor and cow dung were used as the inocula. The bacteria were acclimatized in a semi-batch reactor for 32 days. During the second phase, the COD was found to be 32,200mg/L. A hydraulic retention time of 20 days was used. Also, three different organic loading rates were used-100mg/L-day, 200mg/L-day, and 400mg/L-day. The pH, alkalinity, COD reduction, and gas production of the substrate were monitored. The pH of the systems ranged from 6.5 to 7.3 and no pH adjustments were made. Initially,the alkalinity of the systems had values within the optimum range for alkalinity(1500 to3000mg/L CaCO₃ ). Drop in alkalinity values were observed towards the end of the experiment.The water displacement method was used to measure the volume of gas produced by the systems. Substrate inhibition was evident for the system fed with 8000mg/L.

Language

English

LC Subject

Wastewater, Water purification, Jatropha, Biofuels

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

LG 993.5 2009 E62 C37

Document Type

Thesis

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