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Description: From theory to practice: Continuous flow aerobic granulation using external...
From theory to practice: Continuous flow aerobic granulation using external selectors in full-scale US facilities
Abstract
Work is ongoing to develop robust protocols for SARS-CoV-2 quantification. However, to fully realize the potential of wastewater-based epidemiology, additional methods must be developed to normalize the SARS-CoV-2 concentrations to population equivalence. It is well known that wastewater concentrations vary significantly with wet weather flow, thus a normalization technique must account for variations in wastewater strength. Wastewater concentrations under dry weather will also change with transient populations, and this is especially important for a college town or business community with commuter activity. Biomarkers can be used to determine the number of individuals contributing fecal matter to a sewershed. Ideally, biomarkers are specific to human waste, stable in wastewater, and consistently shed at known rates.
The use of hydrocyclone based wasting provided densification of activated sludge, resulting in rapid improvements of settleability (SVI from 200 mL/g to 90 mL/g within weeks of implementation). Solids retention time (SRT) for the granules fraction was two times more than the flocculent fraction. Longer granules (SRT) preferentially selected PAOs and nitrifiers in the underflow of the hydrocyclone. Consequently, carbon-efficient N and P removal was achieved at influent COD: N ratio of 6:1 without adding external chemicals.
SpeakerRegmi, Pusker
Presentation time
13:45:00
14:00:00
Session time
13:30:00
14:30:00
SessionKnowledge Development Forum: The Plot Thickens Part II - Future of Granular Sludge
Session number505
TopicFacility Operations and Maintenance, Municipal Wastewater Treatment Design, Research and Innovation
TopicFacility Operations and Maintenance, Municipal Wastewater Treatment Design, Research and Innovation
Author(s)
Pusker Regmi
Author(s)P. Regmi1; B. Sturm3; J. Jimenez1; I. Avila2;
Author affiliation(s)Brown and Caldwell, Walnut Creek, CA1Metro Wastewater Reclamation District, CO2The University of Kansas, Lawrence, KS3Metro Wastewater Reclamation District4
SourceProceedings of the Water Environment Federation
Document typeConference Paper
PublisherWater Environment Federation
Print publication date Oct 2021
DOI10.2175/193864718825158147
Volume / Issue
Content sourceWEFTEC
Copyright2021
Word count16

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