Degree Type

Thesis

Date of Award

2008

Degree Name

Master of Science

Department

Agricultural and Biosystems Engineering

Major

Environmental Science

First Advisor

Robert T. Burns

Abstract

This thesis evaluated the effectiveness of ultrasonic pretreatment on biochemical methane potential (BMP) of corn-ethanol by-products (dried distiller grain with solubles (DDGs), centrifuge-solids, thin stillage, and corn-syrup) and four types of animal manure (swine slurry, beef feedlot manure, dairy manure slurry, and solids separated dairy manure effluent) and energy efficiency of ultrasonic pretreatment. Ultrasonic pretreatment was applied with various amplitude and treatment time settings. Biogas production was measured and analyzed for methane content and methane yield. Ultrasonic pretreatment of DDGs, centrifuge-solids, swine slurry, beef feedlot manure, dairy manure slurry, and solids separated dairy manure effluent increased methane production by 25, 12, 14, 55, 37 and 8%, respectively. An increase in ultrasonic amplitude and treatment time resulted in an overall increase in methane production, but with a reduction of energy efficiency. The greatest energy efficiency was obtained with the lowest ultrasonic amplitude combined with the shortest treatment time used.

Copyright Owner

Wei Wu-haan

Language

en

Date Available

2012-04-30

File Format

application/pdf

File Size

118 pages

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