Effect of biochar and wood ash amendment on biochemical methane production of wastewater sludge from a temperature phase anaerobic digestion process
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Cimon, Caroline
issued: 2020-02-26T22:03:33Z
issued: 2020
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Methane production is limited during anaerobic digestion (AD) due to complex molecular structure of organic waste and inhibition of archaea by by-products generated from mineralization of organic matter. In British Columbia, biochar and wood ash are waste products of bioenergy produced from forestry residues. Recent studies have found that addition of biochar to AD increases methane production through direct interspecies electron transfer and biofilm formation, attenuation of inhibition and buffering effect. The objective of this study was to compare the effects of local biochar and wood ash in granular (0.85-4.75 mm) and powdered (< 0.075 mm) form on the biochemical methane production (BMP) of AD of municipal sludge from the Lulu Island wastewater treatment plant (WWTP) in Vancouver, British Columbia (Canada) in batch bioassays. Powdered biochar at dosage of 0.8-3.7 g/g-volatile solids (VS)-substrate achieved the highest improvement in rate of methane production with 192-461% increase from controls, in the first 16 days. This increase was followed by an early stationary methane production phase and a reduction of total methane yield ranging from 9 ± 4% at the lowest dosage to 25 ± 1% at the highest. Results indicated that the early plateau could be caused by adsorption of volatile fatty acids (VFAs) by the biochar. There was generally no significant difference in total methane yield from granular biochar at dosages up to 2.2 g/g-VS-substrate, however, at 3.7 g/g-VS-substrate there was a 16 ± 3% reduction. Methane production rates from wood ash (under the propriety name of ZMM® T-Carbon) amended assays were either not significantly different from controls except at a granular dosage of 2.2 g/g-VS-substrate, where production rates were better than controls. Thus, ZMM® T-Carbon may contribute essential nutrients and be beneficial only under high organic loading rate. Granular ZMM® T-Carbon was effective at reducing ammonia nitrogen by up to 14%. Evidence from BMP colo…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/73613
note: EFFECT OF BIOCHAR AND WOOD ASH AMENDMENT ON BIOCHEMICAL METHANE PRODUCTION OF WASTEWATER SLUDGE FROM A TEMPERATURE PHASE ANAEROBIC DIGESTION PROCESS by Caroline Cimon B.Eng., McGill University, 2013 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) February 2020 © Caroline Cimon, 2020 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis/dissertation entitled: Effect of biochar and wood ash amendment on biochemical methane production of wastewater sludge from a temperature phase anaerobic digestion process submitted by Ms. Caroline Cimon in partial fulfillment of the requirements of the degree of Master of Applied Science. Dr. Cigdem Eskicioglu Supervisor Dr. Sumi Siddiqua Supervisory Committee Member Dr. Nicolas Peleato Supervisory Committee Member Dr. Jian Liu University Examiner iii Abstract Methane production is limited during anaerobic digestion (AD) due to complex molecular structure of organic waste and inhibition of archaea by by-products generated from mineralization of organic matter. In British Columbia, biochar and wood ash are waste products of bioenergy produced from forestry residues. Recent studies have found that addition of biochar to AD increases methane production through direct interspecies electron transfer and biofilm formation, attenuation of inhibition and buffering effect. The objective of this study was to compare the effects of local biochar and wood ash in granular (0.85-4.75 mm) and powdered (< 0.075 mm) form on the biochemical methane production (BMP) of AD of municipal sludge from the Lulu Island wastewater treatment plant (WWTP) in Vancouver, British Columbia (Canada) in batch bioassays. Powdered biochar at dosage of 0.8-3.7 g/g-volatile solids (VS)substrate achieved the highest improvement in rate of m…
has type: Thesis/Dissertation
date issued: 2020-05
is shown at: 10.14288/1.0388730
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/2429/73613