Sludge recycle and reuse in acid mine drainage treatment

Journal Article · Tue Mar 01 04:00:00 EST 1983 · J. - Water Pollut. Control Fed.; (United States)

OSTI ID:6084951

Keefer, G B; Sack, W A

Neutralization of acid mine drainage produces vast quantities of iron-rich sludge, and large quantities of unused lime remain in the sludge after treatment. In a study in which sludge was recycled to increase lime utilization, sludge was mixed with raw acid mine drainage and settled out in an intermediate clarifier. The clarifier supernatant was then treated by lime addition, aeration and sedimentation. The low-pH sludge was withdrawn from the intermediate clarifier. The iron was recovered by acidification and used as wastewater coagulant. The recycle scheme resulted in a 30% decrease in lime requirements, and the resultant coagulant performed well when compared with stock iron coagulant solutions.

• OSTI ID: 6084951
• Journal Information: J. - Water Pollut. Control Fed.; (United States), Journal Name: J. - Water Pollut. Control Fed.; (United States) Vol. 55:3; ISSN JWPFA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ACID MINE DRAINAGE
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
ELEMENTS
IRON
METALS
OXIDES
OXYGEN COMPOUNDS
RECYCLING
SLUDGES
TRANSITION ELEMENTS
WASTE PRODUCT UTILIZATION
WATER TREATMENT