Capital costs of lime treatment at the Augusta wastewater treatment plant

Technical Report · Wed Aug 17 04:00:00 EDT 1988

OSTI ID:6806245

Halverson, N V

The capital costs were estimated for the addition of lime treatment facilities to the Augusta sewage treatment plant as a means of reducing the phosphorus loading of L Lake and consequently reducing the algae populations in the lake. Primary lime treatments and tertiary lime treatments were considered. The capital cost of a primary lime treatment addition would be lower than for a tertiary treatment addition. Depending on whether the existing primary settling tank can be utilized for lime treatment or a new clarifier must be built, a primary lime treatment addition would currently cost between $500,000 and $3 million to construct at the Augusta sewage treatment plant. Primary lime treatment coupled with the existing activated sludge biological treatment system would remove approximately 80% of the phosphorus from the sewage entering the sewage treatment plant, resulting in an effluent concentration of about 2 mg/l. To reduce effluent phosphorus concentration to 1 mg/l or less, additional coagulation and effluent filtration facilities would be necessary. One disadvantage of primary lime treatment, however, would be the two-fold or three-fold increase in sludge to be disposed. Tertiary lime treatment usually results in lower effluent phosphorus levels than primary lime treatment, but the capital cost is significantly higher. Costs for tertiary lime treatment for the Augusta sewage treatment plant would range from $5 million to $14 million. The higher estimate would include an additional settling stage and filtration of the effluent, features which would improve the efficiency of phosphorus removal and reduce the effluent phosphorus concentration. 12 refs.

• Research Organization: Savannah River Lab., Aiken, SC (USA)
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6806245
• Report Number(s): DPST-88-747; ON: DE89001418
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
COST ESTIMATION
FEDERAL REGION IV
GEORGIA
IMPLEMENTATION
LIMING
LIQUID WASTES
MINIMIZATION
MODIFICATIONS
MUNICIPAL WASTES
NORTH AMERICA
PHOSPHORUS COMPOUNDS
POLLUTION ABATEMENT
SEWAGE
USA
WASTES
WATER POLLUTION ABATEMENT