Chemical and bioassay characterizations of sludge and wastewater from fixed bed UNDERC coal gasification: Final report

Technical Report · Tue Jul 01 04:00:00 EDT 1986

OSTI ID:6783831

Neufeld, R D; Sykora, J L; Keleti, G; Moretti, C; Cofano, J; Mayernik, J; Plautz, M

The objective of this research is to evaluate the influence of eight preselected treatment trains for fixed bed coal gasification wastewater treatment on chemical and health effects of residual sludges, sludge leachates, partially treated wastewaters and cooling towers blowdowns. Independent variables were: (1) incorporation of solvent extraction, use of MIBK or DIPE as extractant, solvent/wastewater ratio; (2) incorporation of free with/without fixed ammonia stripping; (3) incorporation of biological activated sludge processing; (4) cooling towers evaporation at ten cycles of concentration. Residual sludges, cooling tower blowdowns, ashed blowdowns and evaporate organics were leached in accord with the ASTM-A (distilled/deionized water), EPA-''EP'' (acetic acid), and a self designed technique (pH=2 using HNO/sub 3/ at a 20/1 liquid/solids ratio). Leachates were evaluated for heavy metal content, Daphnia magna toxicity, bioaccumulative potentials and AMES mutagenicity potentials.

• Research Organization: Pittsburgh Univ., PA (USA)
• DOE Contract Number: AC21-81FC10299
• OSTI ID: 6783831
• Report Number(s): DOE/FC/10299-2261; ON: DE87005412
• 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
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AMMONIA
BIOASSAY
BIOLOGICAL ACCUMULATION
CHEMICAL EFFLUENTS
COAL GASIFICATION
COOLING TOWERS
ELEMENTS
EXTRACTION
GASIFICATION
HAZARDS
HEALTH HAZARDS
HYDRIDES
HYDROGEN COMPOUNDS
LIQUID WASTES
MECHANICAL STRUCTURES
METALS
MUTAGEN SCREENING
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXYGEN COMPOUNDS
PACKED BED
SCREENING
SEPARATION PROCESSES
SLUDGES
SOLVENT EXTRACTION
THERMOCHEMICAL PROCESSES
TOWERS
TOXICITY
WASTE WATER
WASTES
WATER