Removal of color and residual chemical oxygen demand from synfuel wastewater

Technical Report · Wed Jun 01 04:00:00 EDT 1988

DOI:https://doi.org/10.2172/6893041· OSTI ID:6893041

Gallagher, J R; San, T M; Mayer, G G

Color has been classified as a nonconventional'' water pollutant by the Clean Water Act of 1977. This designation allows the government to regulate the amount of color in discharged effluent where warranted. Discharged color detracts from the aesthetic value of the receiving water, and can be a source of public concern. Color may also have negative effects on aquatic life due to decreased light transmittance and toxic effects. The production of synthetic natural gas from coal results in a wastewater with high levels of phenols, ammonia, and organics. This wastewater requires a multiple-stage treatment process to meet discharge regulations. Treatment processes commonly used for coal conversion wastewaters include solvent extraction, stream stripping, and biological oxidation and nitrification. An additional concern with these wastewaters is the presence of color. High levels of color are common in coal conversion wastewaters, even subsequent to secondary treatment. Since the discharge of colored water presents an environmental concern as discussed above, the need for economical, effective methods to remove this color exists. The objective of this research is to evaluate color removal from a coal conversion wastewater by solvent extraction, adsorption, and biological methods. 15 refs., 9 figs., 9 tabs.

• Research Organization: North Dakota Univ., Grand Forks, ND (USA). Energy and Mineral Research Center
• Sponsoring Organization: DOE/FE
• DOE Contract Number: FC21-86MC10637
• OSTI ID: 6893041
• Report Number(s): DOE/MC/10637-2827-Task-6.4; ON: DE90011411
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010800 -- Coal
Lignite
& Peat-- Waste Management
ADSORPTION
ADSORPTION ISOTHERMS
AROMATICS
BIOCONVERSION
CHEMICAL COMPOSITION
COAL GASIFICATION PLANTS
COLOR
DEVELOPERS
DOCUMENT TYPES
EXTRACTION
FUNGI
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
INFRARED SPECTRA
ISOTHERMS
LIQUID WASTES
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANOLEPTIC PROPERTIES
OXYGEN COMPOUNDS
PH VALUE
PHENOLS
PHYSICAL PROPERTIES
PLANTS
POLYMERS
POLYPHENOLS
PROGRESS REPORT
PYROCATECHOL
REMOVAL
SEPARATION PROCESSES
SOLVENT EXTRACTION
SORPTION
SPECTRA
WASTE WATER
WASTES
WATER
WATER TREATMENT