Anaerobic digestion of organic waste mixtures with the addition of biochar
department or school: Applied Science, Faculty of
department or school: Chemical and Biological Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Lucero Saucedo, Sofia Liliana
issued: 2024-06-19T07:00:00Z
issued: 2024
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Anaerobic digestion (AD) systems offer a sustainable approach for biomass resource recovery and energy production. This study explores the potential of solid digestate-derived biochar as an additive to enhance the stability and performance of AD systems, focusing on the effects of biochar dosage, pyrolysis temperature, and pyrolysis catalyst on methane production. Two series of tests were conducted: Test Series 1 using a mixture of chicken, hog, and dairy manure as the substrate, and Test Series 2 employing synthetic food waste. In Test Series 1, biochemical methane potential (BMP) tests were performed with biochar dosages of 0.1 and 0.6 g/g Total Solids. Results showed a marginal improvement in specific methane yield (SMY) at the lower dosage, but an increase of 9.0-53.5% at the higher dosage across all biochar types compared to the control. Hence, the study found a dosage-dependent relationship. The influence of pyrolysis temperature (400°C vs. 500°C) and catalysts (20 wt% K3PO4 vs. 10 wt% K3PO4/10 wt% clinoptilolite) on SMY exhibited opposite trends, and no direct correlation was found between specific surface area of biochar and SMY. In Test Series 2, BMP assays using synthetic food waste revealed a dosage-dependent relationship with SMY. At a lower biochar dosage (0.1 g/g TS), improvements in methane production were marginal, while a higher dosage (0.6 g/g TS) increased methane content by at least 10%, with yield improvements ranging from 35% to 52%. A three-way ANOVA indicated that biochar dosage significantly influenced methane yield, while pyrolysis temperature and catalyst had no statistically significant impact. Multiple linear regression analysis identified the dosage-adjusted aromaticity index as a significant factor affecting SMY, with a unit increase correlating to a 327 mL/g VS increase in SMY. The findings highlight the potential of solid digestate-derived biochar as a valuable additive in AD systems. Optimizing biochar dosage, feedstock, pyrolysis t…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/88505
note: Anaerobic digestion of organic waste mixtures with the addition of biochar by Sofia Liliana Lucero Saucedo B.S., Monterrey Institute of Technology and Higher Education, 2020 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 (Chemical and Biological Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) June 2024 © Sofia Liliana Lucero Saucedo, 2024 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, the thesis entitled: Anaerobic digestion of organic waste mixtures with the addition of biochar submitted by Sofia Liliana Lucero Saucedo in partial fulfilment of the requirements for the degree of Master of Applied Science in Chemical and Biological Engineering Examining Committee: Anthony Lau, Associate Professor, Chemical and Biological Engineering, UBC Supervisor Xiaotao Bi, Professor, Chemical and Biological Engineering, UBC Supervisory Committee Member Susan A. Baldwin, Professor, Chemical and Biological Engineering, UBC Supervisory Committee Member iii Abstract Anaerobic digestion (AD) systems offer a sustainable approach for biomass resource recovery and energy production. This study explores the potential of solid digestate-derived biochar as an additive to enhance the stability and performance of AD systems, focusing on the effects of biochar dosage, pyrolysis temperature, and pyrolysis catalyst on methane production. Two series of tests were conducted: Test Series 1 using a mixture of chicken, hog, and dairy manure as the substrate, and Test Series 2 employing synthetic food waste. In Test Series 1, biochemical methane potential (BMP) tests were performed with biochar dosages of 0.1 and 0.6 g/g Total Solids. Results showed a marginal improvement in specific methane yield (SMY) at the lower dosage, but an increase of 9.0-53.5% at the higher dosage across all bioch…
has type: Thesis/Dissertation
date issued: 2024-11
is shown at: 10.14288/1.0444014
language: eng
degree discipline: Chemical and Biological 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: Lau, Anthony
type: Text
identifier URI: http://hdl.handle.net/2429/88505