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Title: Gasifier wastewater treatment: Phase I cooling tower assessment

Abstract

The principle goal of the gasification research at UNDERC is to develop environmental data on the treatability of wastewaters from the fixed-bed gasification of lignite. Research activities are focused around the cooling tower, where the reuse of treated gasification wastewaters has not been demonstrated in this country. The objective of Phase I cooling tower testing was to evaluate the effectiveness of using minimally treated wastewater (solvent extracted and steam stripped - referred to as stripped gas liquor) as makeup to a cooling tower. Ammonia, alkalinity, phenol, and other non-hydantoin organics were removed from the cooling water by stripping and/or biological degradation. Foaming of the circulating water will be a problem using SGL as makeup and foaming control will be required. The SGL feed cooling system supported a high level of biological activity (1 to 10 million/ml). Pseudomonas aeruginosa was identified as the predominant specie in the system. Severe fouling can be expected for all carbon steel surfaces. Fouling of stainless steel was not a major problem. General corrosion rates of 10 to 24 mils/yr were measured for carbon steel in various parts of the system. Carbon steel heat exchanger tube analysis indicated pitting corrosion penetration rates of 20 to 125more » mils/yr under deposits. Computer analysis also indicated a strong potential for scaling from calcium carbonate precipitation. Results from this study indicate that the use of stripped gas liquor similar to that produced by the UNDERC pilot gasifier as cooling tower makeup is limited by a number of potentially serious operating problems. This water could be used for cooling tower makeup only after additional treatment or possibly with the use of biocides, corrosion inhibitors, and other control methods. 12 references, 6 figures, 7 tables. (DMC)« less

Authors:
; ; ;
Publication Date:
Research Org.:
North Dakota Univ., Grand Forks (USA). Energy Research Center; Radian Corp., Austin, TX (USA)
OSTI Identifier:
6844145
Report Number(s):
DOE/FE/60181-23; CONF-840828-2
ON: DE84007671
DOE Contract Number:  
FC21-83FE60181
Resource Type:
Conference
Resource Relation:
Conference: International synfuels policies and technologies symposium, Philadelphia, PA, USA, 19 Aug 1984
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL GASIFICATION; WASTE WATER; WATER TREATMENT; RECYCLING; AMMONIA; BIOLOGICAL FOULING; CARBON STEELS; CHEMICAL ANALYSIS; COOLING TOWERS; CORROSION; CORROSIVE EFFECTS; EXPERIMENTAL DATA; EXTRACTION; HEAT EXCHANGERS; LIGNITE; PHENOL; REMOVAL; SCALING; STAINLESS STEELS; ALLOYS; AROMATICS; BROWN COAL; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; CHROMIUM ALLOYS; COAL; CORROSION RESISTANT ALLOYS; DATA; ENERGY SOURCES; FOSSIL FUELS; FOULING; FUELS; GASIFICATION; HYDRIDES; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; INFORMATION; IRON ALLOYS; IRON BASE ALLOYS; LIQUID WASTES; MATERIALS; MECHANICAL STRUCTURES; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; NUMERICAL DATA; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHENOLS; SEPARATION PROCESSES; STEELS; THERMOCHEMICAL PROCESSES; TOWERS; WASTES; WATER; 010800* - Coal, Lignite, & Peat- Waste Management; 010404 - Coal, Lignite, & Peat- Gasification

Citation Formats

Mann, M D, Willson, W G, Hendrikson, J G, and Winton, S L. Gasifier wastewater treatment: Phase I cooling tower assessment. United States: N. p., 1984. Web.
Mann, M D, Willson, W G, Hendrikson, J G, & Winton, S L. Gasifier wastewater treatment: Phase I cooling tower assessment. United States.
Mann, M D, Willson, W G, Hendrikson, J G, and Winton, S L. Sun . "Gasifier wastewater treatment: Phase I cooling tower assessment". United States.
@article{osti_6844145,
title = {Gasifier wastewater treatment: Phase I cooling tower assessment},
author = {Mann, M D and Willson, W G and Hendrikson, J G and Winton, S L},
abstractNote = {The principle goal of the gasification research at UNDERC is to develop environmental data on the treatability of wastewaters from the fixed-bed gasification of lignite. Research activities are focused around the cooling tower, where the reuse of treated gasification wastewaters has not been demonstrated in this country. The objective of Phase I cooling tower testing was to evaluate the effectiveness of using minimally treated wastewater (solvent extracted and steam stripped - referred to as stripped gas liquor) as makeup to a cooling tower. Ammonia, alkalinity, phenol, and other non-hydantoin organics were removed from the cooling water by stripping and/or biological degradation. Foaming of the circulating water will be a problem using SGL as makeup and foaming control will be required. The SGL feed cooling system supported a high level of biological activity (1 to 10 million/ml). Pseudomonas aeruginosa was identified as the predominant specie in the system. Severe fouling can be expected for all carbon steel surfaces. Fouling of stainless steel was not a major problem. General corrosion rates of 10 to 24 mils/yr were measured for carbon steel in various parts of the system. Carbon steel heat exchanger tube analysis indicated pitting corrosion penetration rates of 20 to 125 mils/yr under deposits. Computer analysis also indicated a strong potential for scaling from calcium carbonate precipitation. Results from this study indicate that the use of stripped gas liquor similar to that produced by the UNDERC pilot gasifier as cooling tower makeup is limited by a number of potentially serious operating problems. This water could be used for cooling tower makeup only after additional treatment or possibly with the use of biocides, corrosion inhibitors, and other control methods. 12 references, 6 figures, 7 tables. (DMC)},
doi = {},
url = {https://www.osti.gov/biblio/6844145}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

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