Anaerobic treatability of wastewater generated from the ethyl ester production of potassium hydroxide-catalyzed transesterification 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

Amelia E. Parao, Butch G. Bataller, Rex B. Demafelis,

Abstract

The wastewater generated from the ethyl ester production of potassium hydroxide-catalyzed transesterification of Jatropha curcas L. oil was initially characterized. The wastewater has a Chemical Oxygen Demand concentration of 43,060mg/L, Biological Oxygen Demand concentration of 31,281 mg/L pH level of 8.6 alkalinity of 104.11682mg/L CaCO₃. The BOD-COD ratio of the wastewater exceeds 0.6 thus degradability of the waswaters is possible. Parameters monitored for anaerobic treatment include pH, alkalinity, temperature, gas production, COD reduction. The experiment took 46 days including the acclimatization period. Fifty percent(50%,w/v) cow dung and rumen mixture was seeded in the digesters which served as the inoculum. For the first 25days of the experiment, the digesters were fed thrice with 100mg//L-d OLR and once with 200mg/L-d for the acclimatization period. Daily feeding was done afterwards setting the hydraulic retention time at 20 days. wastewater for feeding was diluted to obtain 200mg/L-d, 400mg/L-d and 600mg/L-d organic loading rates. cumulative gas production result show direct proportionality of OLR with gas production the values obtained were 5032mL, 7208mL, and 8070mL for 200, 400, and600mg/L-d OLR setups respectively. Percent COD reduction also showed direct proportionality with increasing organic loading rates. The values obtained were 60.70%, 68.26%, and 78.29% for suggest that the wastewater has potential for anaerobic digestion and as such, for biogas generation.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

LG 993 2009 E62 N66

Document Type

Thesis

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