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Enhancement of Kelowna's biosolids to energy conversion with thermal pretreatments Mehdizadeh, Seyedeh Neda
Abstract
The potential of using biogas generated from organic waste as energy source is broadly recognized and anaerobic digestion has become a major part of modern wastewater treatment plants (WWTPs). Various pretreatment techniques have been recently developed to increase the quantity of biogas and reduce digester volume by enhancing the hydrolysis of waste material fed to the digesters. This study evaluates advanced anaerobic digestion incorporating thermal pretreatments (microwave at 2.45 GHz and conventional heating) as an alternative disposal method for the municipal biosolids generated by Kelowna WWTP (BC, Canada) which are currently composted. To be able to compare microwave irradiation with conventional heating under identical conditions (temperature/ heating rates), a custom pressure vessel was built for conventional heating. Biosolids heated from room temperature up to pretreatment temperatures of 80, 120 and 160oC at heating rate of (7.5oC/min) in the closed vessel microwave unit and the pressure sealed vessel. Both conventional heating and microwave pretreatments indicated that in a pretreatment range of 80-160oC, temperature was a statistically significant factor (p
Item Metadata
Title |
Enhancement of Kelowna's biosolids to energy conversion with thermal pretreatments
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2012
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Description |
The potential of using biogas generated from organic waste as energy source is broadly
recognized and anaerobic digestion has become a major part of modern wastewater treatment
plants (WWTPs). Various pretreatment techniques have been recently developed to increase
the quantity of biogas and reduce digester volume by enhancing the hydrolysis of waste
material fed to the digesters. This study evaluates advanced anaerobic digestion incorporating
thermal pretreatments (microwave at 2.45 GHz and conventional heating) as an alternative
disposal method for the municipal biosolids generated by Kelowna WWTP (BC, Canada)
which are currently composted.
To be able to compare microwave irradiation with conventional heating under identical
conditions (temperature/ heating rates), a custom pressure vessel was built for conventional
heating. Biosolids heated from room temperature up to pretreatment temperatures of 80, 120
and 160oC at heating rate of (7.5oC/min) in the closed vessel microwave unit and the pressure
sealed vessel. Both conventional heating and microwave pretreatments indicated that in a
pretreatment range of 80-160oC, temperature was a statistically significant factor (p
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Genre | |
Type | |
Language |
eng
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Date Available |
2013-10-25
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0071830
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URI | |
Degree (Theses) | |
Program (Theses) | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2013-05
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Campus | |
Scholarly Level |
Graduate
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International