Enhanced Biological Nutrient Removal Driven by Sludge Carbon Sources Extracted Using Different Mechanical Disintegration Treatments
Publication: Journal of Environmental Engineering
Volume 147, Issue 9
Abstract
To find an efficient way to recover and reuse carbon from biosolids for biological nutrient removal (BNR) process enhancement in wastewater treatment plants (WWTPs), the study investigated three methods for sludge treatment and obtained three types of carbon sources with different specification: mechanical disintegration carbon source (MDCS), alkaline mechanical disintegration carbon source (AMDCS), and liquid of hydrolytic acidification after alkaline mechanical disintegration (AMDHCS). After 12 h of absorption (under anaerobic conditions) of these carbon sources with the Biofilm Bio-Nutrient Removal Carbon source regulated Phosphorus Removal (BBNR-CPR) biomass, the biodegradability of humic acid in the sludge supernatant was improved, and the improvement was enhanced by alkali/hydrolytic acidification pretreatment. Carbon sources prepared by different methods were suitable for different temperature environments. At room temperature (), MDCS with a short preparation time (8 min) and low specific energy consumption [ total suspended solids (TSS)] could be reused for BNR; however, the most effective carbon source at low temperature () was AMDHCS, of which the nitrogen and phosphorus removal efficiencies were 48.6% and 100%, respectively.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published paper.
Acknowledgments
This work was financial supported by the program of National Natural Science Foundation of China (21777024) and National key research and development project (2019YFC0408503).
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Published In
Journal of Environmental Engineering
Volume 147 • Issue 9 • September 2021
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© 2021 American Society of Civil Engineers.
History
Received: Dec 22, 2020
Accepted: Apr 12, 2021
Published online: Jul 15, 2021
Published in print: Sep 1, 2021
Discussion open until: Dec 15, 2021
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