Evaluation of on-site biological treatment options for hydrothermal liquefaction aqueous phase derived from sludge in municipal wastewater treatment plants
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Basar, Ibrahim Alper
issued: 2024-05-03T18:32:08Z
issued: 2024
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: In recent decades, resource recovery and waste reduction have become the prominent focus to adapt urban technologies to the circular economy concept. From this point of view, municipal wastewater has been considered a resource rather than a waste stream. A thermochemical conversion process known as hydrothermal liquefaction (HTL) has emerged as a promising candidate for the valorization of municipal sludge, owing to its high energy recovery efficiency and potential to produce value-added products. The HTL process converts organic feedstock into a liquid biofuel called bio-crude via a similar process to the natural occurrence of petroleum by using near-critical water temperatures (250-374°C) and pressures (52-220 bars). The HTL process alone has the potential to reach over 70% energy recovery from municipal sludge in the form of bio-crude, and over 80% of by-products of HTL aqueous phase and hydrochar can be valorized. While the utilization of the HTL process seems promising, there are several challenges that need to be addressed to enable its seamless integration into wastewater treatment plants (WWTP). The most critical challenge is the treatment or valorization of HTL process wastewater, named HTL aqueous phase. In this thesis, regression analysis was used to mathematically establish relationships between the HTL aqueous characteristics and the HTL reaction conditions. HTL aqueous obtained at temperatures ranging from 290 to 360°C and retention times between 0 to 30 minutes was found to contain chemical oxygen demand (COD) levels ranging from 87 to 103 g/L, total ammonia levels of 3.9 to 7.1 g/L, and total phenolics levels of 1.5 to 2.3 g gallic acid equivalent/L. The ultimate biochemical oxygen demand and biochemical methane potential values showed a positive correlation with the secondary sludge ratio in mixed sludge. Among the on-site biological treatment options, both aerobic and mesophilic anaerobic processes were identified as potential choices. In a continu…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/88203
note: EVALUATION OF ON-SITE BIOLOGICAL TREATMENT OPTIONS FOR HYDROTHERMAL LIQUEFACTION AQUEOUS PHASE DERIVED FROM SLUDGE IN MUNICIPAL WASTEWATER TREATMENT PLANTS by Ibrahim Alper Basar M.Sc., Akdeniz University, 2018 B.Sc., Akdeniz University, 2012 A DISSERTATION SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) April 2024 © Ibrahim Alper Basar, 2024 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a dissertation entitled: EVALUATION OF ON-SITE BIOLOGICAL TREATMENT OPTIONS FOR HYDROTHERMAL LIQUEFACTION AQUEOUS PHASE DERIVED FROM SLUDGE IN MUNICIPAL WASTEWATER TREATMENT PLANTS submitted by Ibrahim Alper Basar in partial fulfillment of the requirements of the degree of Doctor of Philosophy. Dr. Cigdem Eskicioglu, School of Engineering Supervisor Dr. Abbas Milani, School of Engineering Supervisory Committee Member Dr. Nicolas Peleato, School of Engineering Supervisory Committee Member Dr. Sina Kheirkhah, School of Engineering University Examiner Dr. Yang Liu, Civil and Environmental Engineering, University of Alberta External Examiner iii Abstract In recent decades, resource recovery and waste reduction have become the prominent focus to adapt urban technologies to the circular economy concept. From this point of view, municipal wastewater has been considered a resource rather than a waste stream. A thermochemical conversion process known as hydrothermal liquefaction (HTL) has emerged as a promising candidate for the valorization of municipal sludge, owing to its high energy recovery efficiency and potential to produce value-added products. The HTL process converts organic feedstock into a liquid biofuel called bio-crude via a similar process to the natural occurrence of petroleum by using near-critical water temperatures (250-374°C) and pressures (52-220 bars…
has type: Thesis/Dissertation
date issued: 2024-05
is shown at: 10.14288/1.0442271
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
contributor: Eskicioglu, Cigdem
type: Text
identifier URI: http://hdl.handle.net/2429/88203