Influence of nutrients on the biological phosphorus removal process at high acetate concentrations

The objective of this study was to examine the influence of nutrients on the biological phosphorus removal process at high acetate concentrations. It was an extension of studies conducted by Randall and Chapin (1994), who found that industrial wastewater with high concentrations of acetate were able to inhibit the biological phosphorus removal process. Two bench-scale pilot plants were operated under controlled conditions that included synthetic wastewater as feed. The acetic acid concentrations in the feed of one system was increased in steps from 200 to 800 mg/L while the acetic acid concentrations in the feed of the other system was constantly held at 200 mg/L. Sludge from both systems was used for batch tests determining the kinetics of phosphorus release and uptake and poly-β-hydroxybutyric acid synthesis. Furthermore, the influence of various nutrients were examined during these batch tests. The results of this study confirmed the observations of Randall and Chapin (1994). High concentrations (600 mg/L) of acetic acid did inhibit the biological phosphorus removal process; however, this inhibition could be countered by adding calcium into the feed. The reactions of phosphorus release and uptake are described by first order kinetics.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Environmental Planning

Department dc:contributor.department

Environmental Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

1994

Author dc:creator

• Seyfried, Alexander G. H.

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Dc Identifier Other

etd-04142009-040745

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/42095