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RPSEA Project 07122-12 TECHNICAL ASSESSMENT OF PRODUCED WATER TREATMENT TECHNOLOGIES 1st Edition Table 44. Summary of technical assessment for Veolia Water Solutions and Technologies: OPUSTM – optimized pretreatment and separation technology. Criteria Life cycle Description/Rationale No data is currently available. Chemicals MultifloTM pretreatment system will require multiple chemical compounds to operate and include acids, bases, hydrolyzing metal coagulants, and polymer based coagulants. Examples of these chemicals are provided in the main body of this report. Chemical cleaning rates depend on feed water quality. Cleaning will typically occur after certain design specifications are exceeded, and may require the use of NaOH, Na4EDTA, or HCl. IX process will require regeneration with strong acid, likely H2SO4 or HCl. O&M considerations Substantial monitoring and control required for flow rates, chemical dosing, IX regeneration, and RO element pressure. System may require moderate oversight to ensure proper operation of the primary RO stage brine management systems. Level of flexibility: Highly flexible system that may readily adapt to changes in feed water quality. Level of robustness: TFC membranes have high pH tolerance, but cannot be exposed to feed temperatures in excess of 113 °F (45 °C). Level of reliability: RO and IX systems operate semi-continuously with automated, short duration chemical rinses or osmotic backwashing cycles (for RO). Types of energy required: electrical. Overall costs Pre-and post treatment Applicability for produced water treatment Note: 1 barrel = 42 US gallons Capital costs are unknown. Product water will require pH stabilization or remineralization. This may be achieved by lime bed contacting or by blending small amounts of filtered and sterilized feed water with permeate. Excellent – Treatment provides robust pretreatment to limit foulant loading on high-pressure membranes. Back to the list of technologies Concentrate management or waste disposal No special concentrate treatment is required. Relatively high recovery rates exceeding 90% generate very minor amounts of concentrated brine. Sludge from the sedimentation basin will require dewatering and landfill application. 121PDF Image | TECHNICAL ASSESSMENT OF PRODUCED WATER TREATMENT TECHNOLOGIES
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