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 Concurrent Technologies Corporation
Remediation Survey
Ground Water Pump and Treat with an Air Stripper
Page 5
4.
Remediation Hardware:
A. Equalization tank: 5,000 gal tank equipped with an oil skimmer.
B. Coagulant unit: 500 gal tank, electric mixer, and electric feed pump to add a 50% solution of coagulant to the
aerator tank. Coagulant will agglomerate colloidal solids to achieve an effective size and settling rate.
5.
Capital Cost:
6.
Operating and Maintenance Cost:
C.
Air Stripper
1.
Design Goals:
Two strippers in series
2.
Design Parameters
a.
Stripper Height:
14 ft packing
b.
Stripper Diameter:
3 ft OD
c.
Blower Rate:
500 to 1,000 cfm
d.
Packing Material:
e.
Pretreatment Requirements:
f.
Removal Efficiency:
99%
g.
Other: 150 GPM process water
3.
Design Tools:
4.
Remediation Hardware:
pH Adjustment Unit is a 500 gal caustic holding tank and electric feed pump to add a
50% caustic solution of NaOH to the equalization tank. This raises the pH to 8.5 to precipitate out metal hydroxides.
5.
Capital Cost:
6.
Operating and Maintenance Cost:
D.
Carbon Treatment
1.
Design Goals
Liquid Phase
Vapor Phase
a.
Contaminant Types:
b.
Contaminant Discharge Limits:
2.
Design Parameters
a.
GAC Type:
(2) 4,000 lb
(2) 2,000 lb
units in series
units in series
b.
GAC Volume:
c.
Flow Through Rate:
150 GPM
d.
Contact Time:
15 min
e.
Removal Efficiency:
f.
Other:
3.
Design Tools:
4.
Remediation Hardware:
A. Polymer feet unit is a 500 gal tank and electric mixer and pump to feed flocculent to the flocculation tank to aid
settling.
B. Clarifier tank (8,800 gal) separates by sedimentation the precipitated solids.
C. Clarifier sludge tank (2,000 gal) and a plate and frame filter press provide de-watering of the solids.
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