Effect of phosphorous addition to model cooling towers using coal gasification wastewater as makeup

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5207182

Priebe, B D; Turner, C D

Cooling towers are an integral part of in-plant water reuse systems in industries such as the Great Plains Gasification Plant being constructed at Beulah, North Dakota. Cooling towers can be used to reduce water requirements, remove biodegradable organics, and concentrate non-biodegradable compounds for ultimate disposal while accomplishing the basic water cooling function. The gasification wastewater used in cooling towers at coal gasification plants must be pretreated using solvent extraction and ammonia stripping to produce stripped gas liquor (SGL). The SGL remains contaminated with organics, ammonia (NH/sub 3/), cyanides (CN), and thiocyanates (SCN) but at levels that microorganisms can acclimate to in cooling towers. The objective of this investigation was to examine the effects of adding phosphorous to the nutrient deficient SGL in order to improve organics removal and to evaluate changes in biofouling and corrosion in the model cooling towers. The removal of contaminants from SGL was shown to be enhanced by the addition of phosphorous to makeup water for use in cooling towers. Unfortunately, the attached and suspended deposits became an increasing problem in terms of clogging the tower packing and tubing.

• Research Organization: North Dakota Univ., Grand Forks (USA). Energy Research Center
• DOE Contract Number: FC21-83FE60181
• OSTI ID: 5207182
• Report Number(s): DOE/FE/60181-83; CONF-8404105-6; ON: DE84009349
• 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
ADDITIVES
COAL GASIFICATION
COAL GASIFICATION PLANTS
COOLING TOWERS
ELEMENTS
GASIFICATION
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
MECHANICAL STRUCTURES
NONMETALS
OXYGEN COMPOUNDS
PERFORMANCE
PHOSPHORUS
RECYCLING
THERMOCHEMICAL PROCESSES
TOWERS
WASTE WATER
WASTES
WATER