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RPSEA Project 07122-12 TECHNICAL ASSESSMENT OF PRODUCED WATER TREATMENT TECHNOLOGIES 1st Edition resulting from WFRD processing was less in the Powder River samples, the levels measured in Powder River recovered water were very low [138]. Currently, AGV Technologies, Inc. is developing the PW-600 – the first commercial AGV product. It will be available for installation in oil and gas production and produced water disposal facilities. The PW-600 system is designed to process 25 kgal (600 barrels) of produced water per day. Initial PW-600 units are electrically powered. Waste heat, cogeneration, and renewable energy powered models will be available. The WFRD system has been proved promising through the short-term laboratory testing. Long-term testing would be required to demonstrate its performance and efficiency in production field. The assessment summarized in Table 37 is based on test operation of the prototype system and results presented in the 2004 Final Report “Improving Produced Water Quality for Coal Bed Methane. Prepared by AGV Technologies, Inc. for RPSEA” [138]. Table 37. Summary of technical assessment of the WFRD distillation system. Criteria Feed water quality bins Product water quality Production efficiency (recovery) Infrastructure considerations Energy consumption Life cycle Description/Rationale Applicable to TDS range from 1000 to 23, 000 mg/L. TDS rejection 99%; TOC rejection 70- 86%; ammonia rejection low. Product water recovery is approximately 90%. No special infrastructural requirement as the unit is skid-mounted. The system requires housing or shed. Energy sources could be gas, electricity, thermal, and renewable energies. Not available. Not available. Industrial status Emerging technology in produced water treatment. Has been previously employed for CBM produced water treatment at bench-scale (capacity 2.6 gallons per hour). Currently the vendor, AGV Technologies, Inc. is developing a commercial unit treating 600 bpd of produced water. Chemicals It is expected that scale inhibitor and acid may be required for process control to prevent scaling. Corrosion control is achieved via pH control. Annual cleaning is typically conducted using acid, EDTA, or other antiscaling chemicals. O&M considerations High level of monitoring and control required for feed pH, flow rates as well as steam and vessel pressures. High level of skilled labor required to operate distillation system. High level of flexibility: easy to adapt to highly varying water quality and quantity. High level of robustness: high ability of the equipment to withstand harsh conditions. High level of reliability. Overall costs Not available. AGC Technology estimates that the operational cost of processing produced water with the WFRD will be approximately 30% of that for the distillation systems ($0.67/bbl). If powered with thermal energy from a methane-fired boiler, the operating cost would be reduced 45% compared with the electrically powered WFRD. A cogeneration configuration results in a 67% cost reduction compared with electrically powered WFRD configuration. 99PDF Image | TECHNICAL ASSESSMENT OF PRODUCED WATER TREATMENT TECHNOLOGIES
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