Use of treated gasification wastewater in a pilot cooling tower. Phase II final report for the period ending December 31, 1984
Phase I and II cooling tower reuse tests have been completed using wastewater produced in the University of North Dakota Energy Research Center (UNDERC) pilot slagging fixed-bed gasifier (SFBG). In the UNDERC Phase I test, using solvent extracted and steam stripped wastewater, problems such as high carbon steel corrosion rates, severe biological fouling, and substantial phenol and ammonia emissions, were encountered. Phase II testing was performed to determine if further treatment of this liquor would yield a suitable cooling tower makeup supply. Extracted and stripped wastewater, similar to that used for Phase I testing, was further treated by biological oxidation, granular activated carbon adsorption, and multimedia filtration before being fed to the cooling tower. Phase II results indicated that the aqueous effluent from SFBG, after treatment by solvent extraction, steam stripping, biological oxidation, granular activated carbon adsorption, and multimedia filtration, was not directly usable as cooling tower makeup. Without chemical addition, this water was highly corrosive to carbon steel; measured corrosion rates ranged from 20 to 65 mpy. Severe fouling of carbon steel was also encountered, resulting in high pressure losses across heat exchangers and decreased heat transfer coefficients. Based on these results, the use of this water as cooling tower makeup would require control of corrosion and the associated fouling and/or extensive use of stainless steel, or a substitute corrosion resistant material, in all areas where carbon steel has traditionally been used. This report provides a detailed presentation of results from the Phase II test, and also a comparison of these results to those obtained from the Phase I test. 26 refs., 29 figs., 39 tabs.
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Energy Research Center
- DOE Contract Number:
- FC21-83FE60181
- OSTI ID:
- 5731387
- Report Number(s):
- DOE/FE/60181-1867; ON: DE85013985
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
ALLOYS
AMMONIA
AROMATICS
BIODEGRADATION
BLOWDOWN
CARBON
CARBON STEELS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL GASIFICATION PLANTS
COOLING TOWERS
CORROSION
DATA
DECOMPOSITION
ELEMENTS
EMISSION
EXPERIMENTAL DATA
EXTRACTION
FILTRATION
FOULING
HEAT EXCHANGERS
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LIQUID WASTES
MECHANICAL STRUCTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PACKED BED
PHENOL
PHENOLS
RECYCLING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SORPTION
STEELS
TOWERS
WASTE WATER
WASTES
WATER
WATER TREATMENT