Effects of nickel on activated sludge performance at varying COD:TKN ratios

The effects of a continuous dose of 0.5 mg/l nickel on activated sludge performance at varying COD:TKN ratios were investigated. Continuous flow, complete mix, bench-scale reactors were operated over a range of mean cell residence times, and COD removal efficiency, biokinetic coefficients, extent of nitrification, and nickel removal evaluated at each. Data from two earlier studies, in which 0.5 and 1 mg/l nickel doses were applied to similar units, were included for comparison. Organic removal efficiency was not impaired for the nickel doses considered. Biokinetic coefficients and nitrate production were also unaffected by 0.5 mg/l nickel. In contrast, one mg/l nickel sharply inhibited nitrification, caused an apparent decrease in reactor solids concentration, and related biokinetic changes in coefficients. Nickel removal was erratic.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Sanitary Engineering

Department dc:contributor.department

Sanitary Engineering

Grantor dc:publisher

Virginia Polytechnic Institute and State University

Year dc:date.issued

1982

Author dc:creator

• Trahern, Patti Gremillion

Statement dc:rights

• In Copyright

Licence dc:rights.uri

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

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/10919/82657

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/82657