Award Date

1-1-2004

Degree Type

Thesis

Degree Name

Master of Engineering (ME)

Department

Civil and Environmental Engineering

First Committee Member

Jacimaria R. Batista

Number of Pages

169

Abstract

Digested sludge liquors from wastewater treatment plants that include enhanced biological phosphorus removal (EBPR) in their treatment process have the potential to form struvite (MgNH4PO4·6H 2O). The potential can be determined by the concentrations of struvite constituents including phosphorus, ammonium, and magnesium. Phosphorus concentration of digested sludge liquors is expected to increase when EBPR is introduced to wastewater treatment plants because phosphorus accumulating organisms (PAOs) can accumulate phosphorus beyond their metabolic needs and phosphosphorus can be relased when they are digested anaerobically. The work presented in this thesis focuses on determining the potential for struvite formation at the City of Las Vegas Water Pollutant Control Facility (WPCF) due to the introduction of EBPR. Specifically, the struvite formation potential of digested sludge centrate is investigated using mass balances, batch tests, and chemical equilibrium modeling with the software MINEQL+.

Keywords

Balanced; Batch; Chemical; Digested; Ebpr; Equilibrium; Formation; Mass; Modeling; Potential; Precipitation; Prediction; Sludge; Struvite; Tests

Controlled Subject

Environmental engineering; Environmental sciences

File Format

pdf

File Size

4935.68 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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