THERMAL SCIENCE

International Scientific Journal

Mujahid Ali

,

Faisal Mahmood

,

Christian Fabrice Mbeugang

,

Jiazhen Tang

,

Bin Li

INFLUENCE OF HYDROLYSIS ON PYROLYSIS PRODUCTS FROM SEWAGE SLUDGE

ABSTRACT
In this research endeavor, the influence of thermal hydrolysis treatment on product distribution obtained through the pyrolysis of hydrolysis treated sludge and raw sewage sludge was investigated. Raw sewage sludge sample was received from a municipal sewage sludge treatment plant, and hydrolysis of sewage sludge was performed at a temperature of 200°C and a pressure of 0.4 MPa in a fixed-bed furnace. The pore structure of the obtained biochar and non-condensable gas collected at various temperatures was analyzed via Brunauer, Emmett, and Teller and gas chromatography techniques, respectively. The results revealed that thermal hydrolysis treatment had a significant impact on product distribution at varying temperatures (500-800°C). An increase in temperature led to a decrease in the biochar and biooil yield, while the yield of gas increased for both hydrolysis treated sludge and raw sewage sludge. It was observed that the concentration of H2, CH4, and CO from hydrolysis treated sludge was higher than raw sewage sludge. Furthermore, it was observed that by increasing the temperature, the pore volume and specific surface area of the biochar increased while the average pore width decreased. The maximum Brunauer, Emmett, and Teller surface area was measured from biochar obtained from hydrolysis treated sludge at 800°C as 50.61 m2/g. The findings suggest that thermal hydrolysis treatment is a viable method for the treatment of sewage sludge as compared to conventional methods.
KEYWORDS
Thermal hydrolysis treatment, Biochar, sewage sludge, pyrolysis, surface area
PAPER SUBMITTED: 2023-12-08
PAPER REVISED: 2024-01-17
PAPER ACCEPTED: 2024-01-25
PUBLISHED ONLINE: 2024-03-10
DOI REFERENCE: https://doi.org/10.2298/TSCI231208065A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 5, PAGES [3817 - 3824]
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Influence of hydrolysis on pyrolysis products from sewage sludge

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence