Nguyen Quoc, Bao

Bao Nguyen Quoc is a PhD student at University of Washington. His work focuses on the connection between kinetics and molecular microbiology in aerobic granular sludge.

Titles from this speaker

Effect of Granule Sizes on Ammonia Oxidation Rates

Abstract

Different aerobic granular sludge size fractions of a pilot plant were evaluated for their ammonia oxidation rates and community composition with batch tests and molecular tool (qPCR, genomic analysis). The pilot plant was fed with centrate and secondary effluent amended with acetate as the main carbon source in a well-mixed anaerobic phase. Small (0.33mm) granules had a 4.72 ± 0.09 times higher ammonia oxidation rate, and a 4.05 ± 0.17 higher abundace in ammonium oxidizers than large (2.23mm) granules, which aligned with modeling results showing a higher aerobic volume fraction for smaller size fractions. However, small granules had 1.43 ± 0.01 times lower ammonia oxidation rate and 1.66 ± 0.04 times lower amoA copy gene number per surface area than big granules, which was also confirmed with theoretical calculations. This work provided a roadmap to control nitrification capacity by two methods (a) blending larger granules into smaller fractions to increase the net aerobic surface area or (b) increasing the sludge bed volume and hence the mixed liquor suspended solid concentration to increase the total aerobic volume fraction.

SpeakerNguyen Quoc, Bao

Presentation time

14:10:00

14:30:00

Session time

13:30:00

14:30:00

SessionKinetic Considerations for Granulation and Densification

Session number401

TopicMunicipal Wastewater Treatment Design, Nutrients, Research and Innovation, Resilience, Disaster Planning and Recovery

Author(s)

B. Nguyen QuocS. WeiM. ArmentaB. BucherP. SukapanpotharamD. StahlD. Stahl

Author(s)B. Nguyen Quoc1; S. Wei1; M. Armenta1; B. Bucher2; P. Sukapanpotharam2; D. Stahl1; D. Stahl1;

Author affiliation(s)Department of Civil and Environmental Engineering, University of Washington, WA1; Resource Recovery, Wastewater Treatment Division, King County Department of Natural Resources and Parks2

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2020

DOI10.2175/193864718825157397

Volume / Issue

Content sourceWEFTEC

Word count9