Emissions of metals, chromium and nickel species, and organics from municipal waste-water-sludge incinerators. Volume 3. Site 6 emission-test report. Final report, 1989-91

Technical Report · Sun Mar 01 00:00:00 EST 1992

OSTI ID:5459110

Segall, R R; DeWees, W G

Site 6, a multiple hearth furnace was tested under two operating conditions, normal combustion was compared with improved combustion conditions as indicated by reduced CO and THC emissions. The effect of lime conditioning on the conversion of total chromium in the sludge to hexavalent chromium emissions was also a primary concern at Site 6. Secondary objectives included comparing the results for chromium and nickel subspecies determined by different analytical procedures, gathering data on other metals and inorganic/organic gases in incinerator emissions, and assessing pollutant removal efficiencies by measuring emissions at both the inlet and outlet to the control system. The Site 6 plant treats 30 million gallons a day of municipal and industrial wastewater. The blended primary/secondary sludge is dewatered to approximately 28% solids using recessed plate cloth filters. The metal mass emissions rate for the outlet runs averaged: As - not detected (< 508 mg/hr), Be - not detected (< 2.2 mg/hr), Cd - 1,450 mg/hr, Cr - 83.3 mg/hr, Pb - 21,100 mg/hr, and Ni - 73.9 mg/hr. The particulate mass emission rates averaged 42 kg/hr and 0.7 kg/hr, respectively for the inlet andoutlet. A positive correlation between the CO/CO2 ratios (an indication of combustion conditions) and the hexavalent to total chromium ratio was demonstrated for the outlet location. At low CO levels (good combustion) the ratio of hexavalent chromium to trivalent chromium was highest, with approximately 10% of the total chromium in the form of hexavalent chromium. It was anticipated that the nickel subsulfide emissions from multiple hearth incinerators would constitute less than 1% of the total nickel emissions. A wet chemical analysis indicated that within the detection limit (< 10%), no nickel subsulfide was present.

• Research Organization: Entropy Environmentalists, Inc., Research Triangle Park, NC (United States)
• OSTI ID: 5459110
• Report Number(s): PB-92-151570/XAB; CNN: EPA-68-CO-0027
• Resource Relation: Other Information: See also Volume 2, PB92-151562 and Volume 4, PB92-151588. Prepared in cooperation with DEECO, Inc., Cary, NC., and Lewis (F. Michael), Mountain View, CA. Sponsored by Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
INORGANIC COMPOUNDS
MATERIALS RECOVERY
METALS
MUNICIPAL WASTES
COMBUSTION
ORGANIC COMPOUNDS
AIR POLLUTION
AIR POLLUTION CONTROL
CHEMICAL ANALYSIS
ECOLOGICAL CONCENTRATION
INCINERATORS
INDUSTRIAL WASTES
QUALITY ASSURANCE
SEWAGE SLUDGE
SITE SURVEYS
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
CHEMICAL REACTIONS
CONTROL
ELEMENTS
MANAGEMENT
MATERIALS
OXIDATION
POLLUTION
POLLUTION CONTROL
PROCESSING
RECOVERY
SEWAGE
SLUDGES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring &amp; Transport- (1990-)