Emerging technologies for treatment and volume reduction of heavy metal containing wastes
The demand for effective treatment and volume reduction methods for heavy-metal containing wastes has been stronger than ever partly due to the fact that land disposal of dewatered sludge nowadays faces stringent regulatory requirements. This review is made on some selected newly developed processes in treating heavy metal bearing wastewaters and/or the volume reduction of the subsequently produced sludges. End-of-the-pipe treatment by SULFEX and modified sulfide precipitation processes have shown the promise to cause lower chemical consumption, higher removal efficiency, more desirable sludge properties, and smaller volume and weight of the dewatered material for transportation and landfill operations. The volume reduction, dewatering, and stabilization processes for sludges have also been reviewed. These include coagulation, filtration, crystallization, magnetic separation, freeze-thaw, etc. Their merits and technical feasibility have been evaluated. The applications of such emerging technologies have to be considered on a case-by-case basis. Treatability and cost-effectiveness study needs to be performed before the start of engineering and construction of a treatment and volume reduction facility.
- OSTI ID:
- 6099088
- Report Number(s):
- CONF-870323-
- Country of Publication:
- United States
- Language:
- English
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54 ENVIRONMENTAL SCIENCES
CHELATES
CHEMICAL REACTIONS
COMPLEXES
DEHYDRATION
DEMETALLIZATION
DESULFURIZATION
DOCUMENT TYPES
EFFICIENCY
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
ION EXCHANGE
LIQUID WASTES
MANAGEMENT
METALS
OXYGEN COMPOUNDS
POLLUTION REGULATIONS
PROCESSING
REGULATIONS
REMOVAL
REVIEWS
SANITARY LANDFILLS
SEPARATION PROCESSES
SLUDGES
SOLVENT EXTRACTION
STABILIZATION
VOLUME
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER TREATMENT