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99182 SCREENING AND EVALUATION OF MICROBIOLOGICALLY INFLUENCED CORROSION (MIC) IN SEAWATER AND EFFLUENT WATER INJECTION SYSTEMS IN KUWAIT

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Product Number: 51300-99182-SG
ISBN: 99182 1999 CP
Author: A. A1-Hashem, M. Salman and J. Carew
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Injection water sources in Kuwait range from brackish water (TDS=4000 mg/l) through seawater (TDS = 30,000 mg/l) to high saline brines (TDS = 200,000 mg/l). Some of these water sources are highly sulphide sour and may require treatment to prevent scaling, corrosion or iron sulphide precipitation. Another particular problem in water injection systems is the uncontrolled growth of sulphate-reducing bacteria (SRB) which leads to increased corrosion of the process plant. Therefore, evaluation schemes were undertaken to study the relative risks of MIC in a range of Kuwait’s water sources, using a combination of field sampling and laboratory biofouling trials. Recirculating biofouling loops were set up with the appropriate site water, and inoculated with the bacteria fi-om the system so that an active biofihn was set up on small studs. These biofouled studs were treated with proprietary biocide inhibitors under various dose rates in order to select the most appropriate control regime for particular water chemistries and process options. Keywords: Seawater, effluent water, brackish water, water injection, biocide inhibitors.
Injection water sources in Kuwait range from brackish water (TDS=4000 mg/l) through seawater (TDS = 30,000 mg/l) to high saline brines (TDS = 200,000 mg/l). Some of these water sources are highly sulphide sour and may require treatment to prevent scaling, corrosion or iron sulphide precipitation. Another particular problem in water injection systems is the uncontrolled growth of sulphate-reducing bacteria (SRB) which leads to increased corrosion of the process plant. Therefore, evaluation schemes were undertaken to study the relative risks of MIC in a range of Kuwait’s water sources, using a combination of field sampling and laboratory biofouling trials. Recirculating biofouling loops were set up with the appropriate site water, and inoculated with the bacteria fi-om the system so that an active biofihn was set up on small studs. These biofouled studs were treated with proprietary biocide inhibitors under various dose rates in order to select the most appropriate control regime for particular water chemistries and process options. Keywords: Seawater, effluent water, brackish water, water injection, biocide inhibitors.
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98293 CONTROL OF MICROBIALLY INFLUENCED CORROSION IN AN EFFLUENT WATER INJECTION SYSTEM IN WEST KUWAIT

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Quantification of Microbiologically Influenced Corrosion in Injection Water Pipelines

Product Number: 51317--9343-SG
ISBN: 9343 2017 CP
Author: Uffe Thomsen
Publication Date: 2017
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MIC-causing microorganisms were investigated in a 16” diameter and 9.6 km long injection water pipeline. Nitrate was added to the water and pigging debris from the pipeline showed that both sulfate-reducing bacteria (SRB), nitrate-utilizing bacteria, and methanogens were present in numbers of 105 – 106 cells/g.
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