Microwave enhanced advanced oxidation process (MW/H₂O₂-AOP) treatment of sewage sludge at different pH conditions
department or school: Applied Science, Faculty of
department or school: Civil Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Tunilė, Indrė
issued: 2018-04-16T16:22:38Z
issued: 2018
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: The primary focus of this study was to investigate the effectiveness of a microwave-enhanced advanced oxidation process (MW/H₂O₂-AOP) for treating sludge from a membrane-enhanced biological phosphorus removal process in neutral, acidic (pH 4) and alkaline (pH 9) conditions. Two different MW systems were utilized; the bench-scale (2450 MHz) and pilot-scale (915 MHz) systems that operate in batch-mode and continuous-flow mode, respectively. The effects of pH on solids disintegration, nutrient release and the physical properties of sludge were examined. The MW/H₂O₂-AOP treatment was very effective; the total suspended solids reduction and chemical oxygen demand solubilization was better for alkaline sets rather than acidic. However, acidic conditions were superior in the release of orthophosphate, particle size distribution, dewatering properties and settling. In the treatment of acidified dairy manure, with the 915 MHz pilot-scale system at temperatures of 90 and 110°C and with a hydrogen peroxide dosage of 0.6% (v/v) per percent of total solids, the MW/H₂O₂AOP yielded a clear supernatant, rich in the nutrients required for struvite (MgNH₄PO₄·6H₂O₂) crystal formation. A total of fifteen salt water experiments were conducted with a salt concentration ranging from 10 to 120 g/L at three different flow rates (6, 7.5 and 9 L/min). The dominant heating mechanism was dipolar polarization and ionic conduction at a high flow rate and high salt concentration, respectively. High concentrations of ions suppressed the dielectric polarization, resulting in lower temperatures. Energy consumption was similar among the sets.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/65393
note: Microwave enhanced advanced oxidation process (MW/H2O2-AOP) treatment of sewage sludge at different pH conditions by Indrė Tunilė B.Eng., Queen’s University Belfast, 2011 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) April, 2018 © Indre Tunile, 2018 ii Abstract The primary focus of this study was to investigate the effectiveness of a microwave-enhanced advanced oxidation process (MW/H2O2-AOP) for treating sludge from a membrane-enhanced biological phosphorus removal process in neutral, acidic (pH 4) and alkaline (pH 9) conditions. Two different MW systems were utilized; the bench-scale (2450 MHz) and pilot-scale (915 MHz) systems that operate in batch-mode and continuous-flow mode, respectively. The effects of pH on solids disintegration, nutrient release and the physical properties of sludge were examined. The MW/H2O2-AOP treatment was very effective; the total suspended solids reduction and chemical oxygen demand solubilization was better for alkaline sets rather than acidic. However, acidic conditions were superior in the release of orthophosphate, particle size distribution, dewatering properties and settling. In the treatment of acidified dairy manure, with the 915 MHz pilot-scale system at temperatures of 90 and 110°C and with a hydrogen peroxide dosage of 0.6% (v/v) per percent of total solids, the MW/H2O2-AOP yielded a clear supernatant, rich in the nutrients required for struvite (MgNH4PO4·6H2O2) crystal formation. A total of fifteen salt water experiments were conducted with a salt concentration ranging from 10 to 120 g/L at three different flow rates (6, 7.5 and 9 L/min). The dominant heating mechanism was dipolar polarization and ionic conduction at a high flow rate and high salt concentration, respectively. High concentrations of ions suppressed the dielectric polarization, res…
has type: Thesis/Dissertation
date issued: 2018-05
is shown at: 10.14288/1.0365709
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/65393