Influence of temperature phased anaerobic digestion on stabilization of municipal wastewater sludge
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Nazyab, Bita
issued: 2018-12-07T16:20:41Z
issued: 2018
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Wastewater sludge has the most significant volume among all the constituents that are removed through wastewater treatment, and the annual cost of treating and disposing it accounts for more than half of the overall operation cost of a wastewater treatment plant (WWTP). Among all methods for treating the sludge, anaerobic digestion is the most popular process for its ability to reduce the pathogens and odor potential, save energy by producing methane-rich biogas, as well as reduce the biosolids volume for disposal. Although anaerobic digestion is the most favorable option for the treatment of sludge, it still has some aspects that can be improved. Emerging sludge treatment technologies are currently being studied to reduce the digester volume required and enhance the biogas production in anaerobic digestion. This study investigated the effect of temperature phased anaerobic digestion (TPAD) on treatment of municipal sludge generated by Lulu Island WWTP (BC, Canada) and compared it to conventional single-stage mesophilic anaerobic digestion (AD) currently implemented at the Lulu Island plant. A total number of five lab-scale digesters were operated according to the following scenarios: single-stage mesophilic AD (control), TPAD1 (acid/methane phase temperatures of 55/38°C), TPAD2 (acid/methane phase temperatures of 70/38°C). The systems were operated at three overall sludge retention times (SRTs) including 30, 20, and 15 days. The acid-phase of TPAD systems were able to improve the hydrolysis of sludge significantly and the acid phase of TPAD2 (70°C/2-d SRT) achieved the highest soluble to total chemical oxygen demand (COD), protein, humic acid and sugar ratios. Overall, anaerobic digestion benefited considerably from TPAD in terms of methane yield, pathogen removal and dewatering rate of biosolids. Relative improvements (over control) in solids removal and methane yield increased considerably by gradually decreasing the SRT from 30 to 20 and 15 days. TPAD1 system ac…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/67987
note: INFLUENCE OF TEMPERATURE PHASED ANAEROBIC DIGESTION ON STABILIZATION OF MUNICIPAL WASTEWATER SLUDGE by Bita Nazyab B.Sc., in Chemical Engineering, University of Tehran, Iran, 2015 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) December 2018 © Bita Nazyab, 2018 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis/dissertation entitled: INFLUENCE OF TEMPERATURE PHASED ANAEROBIC DIGESTION ON STABILIZATION OF MUNICIPAL WASTEWATER SLUDGE submitted by Bita Nazyab in partial fulfillment of the requirements of the degree of Master of Applied Science . Dr. Cigdem Eskicioglu, School of Engineering, UBCO Supervisor Dr. Sumi Siddiqua, School of Engineering, UBCO Supervisory Committee Member Dr. Bahman Naser, School of Engineering, UBCO Supervisory Committee Member Dr. Thomas Johnson, School of Engineering, UBCO University Examiner iii Abstract Wastewater sludge has the most significant volume among all the constituents that are removed through wastewater treatment, and the annual cost of treating and disposing it accounts for more than half of the overall operation cost of a wastewater treatment plant (WWTP). Among all methods for treating the sludge, anaerobic digestion is the most popular process for its ability to reduce the pathogens and odor potential, save energy by producing methane-rich biogas, as well as reduce the biosolids volume for disposal. Although anaerobic digestion is the most favorable option for the treatment of sludge, it still has some aspects that can be improved. Emerging sludge treatment technologies are currently being studied to reduce the digester volume required and enhance the biogas production in anaerobic digestion. This study investigated the effect of temperature phased anaerobic digestion (TPAD) on treatment …
has type: Thesis/Dissertation
date issued: 2018-11
is shown at: 10.14288/1.0375644
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/2429/67987