The reuse of produced water is becoming pivotal to the continued application of fracturing hydrocarbon recovery techniques. While the sector’s economic and market conditions remain soft, an innovative, cost effective solution is being demonstrated at this facility. Benefits including reduced chemical costs and improved SRB (Sulfur Reducing Bacteria) APB (Acid Producing Bacteria) control are being provided. Improved surface water logistics and enhanced environmental stewardship are additional benefits being captured by E&P operators using these solutions.
The facility provides surface water management for the surrounding area and has a nominal throughput capacity of 10,000 billion barrels (bbls) per day. The key process units at the facility include enhanced oil recovery and solids separation, aerated biological treatment for management of dissolved constituents and water quality, and storage for future fracturing activities. While the use of biologic treatment is wide-spread throughout the wastewater treatment industry, its use is just emerging in the oil field sector. With proper design and equipment selection and sizing, robust, cost effective solutions are being installed and are helping operators remain competitive in a tight oil and gas market.
Sourcing suitable water and the high cost to chemically treat produced water are two reasons why the industry is seeking more economical and environmental sound surface water management solutions. Increased reuse of produced water conserves limited fresh water resources, reduces handling and hauling costs, and drastically reduces the volume of water injected underground for disposal.
Successful biologic treatment requires a broad understanding of the operational objectives for the facility. Unlike conventional designs which focus on capacity and regulatory effluent standards, produced water treatment is akin to a manufacturing operation that needs to respond to the dynamic needs of the business. This includes but is not limited to mitigating the health and safety issues of stored water, ensuring downstream chemical treatment effectiveness, and providing treatment and operational performance under highly variable flow and operating water level conditions.
Aerobic biologic treatment is energy intensive and aeration is the single largest requirement in the entire plant. To deliver best total ownership cost, a range of aeration solutions were evaluated. For this application, a high efficiency, variable output solution was selected and applied.
The characteristics of produced water including high variability and elevated salinity represent a unique set of challenges. The materials of construction and operating range were reviewed in detail to provide the desired level of operational flexibility.
EDI, with its extensive experience in biological treatment and aeration including over 7,000 installations worldwide, delivered a turnkey solution that specifically addresses the unique challenges for the project. The installed solution featured:
EDI also provided a customized front-to-back maintenance service package to assure the aeration system is always in top operating condition.
System commissioning was completed in February 2017. The system has provided continuous treatment with no system major outages since commissioning. Energy use was reduced by over 50% as compared to alternate aeration solutions.
The capital and O&M costs for the aeration system amounts to a few cents per barrel of water treated making the solution attractive on both short and long-term project profiles.
aeration for life
…means we support
from the first design,
with the easiest installation processes,
with the widest range of American-made aftermarket parts, so treatment plants can trust their aeration again.
Floor mounted modular configuration aeration system with chemically-compatible flexible membrane fine bubble tube diffusers; variable output blowers, and maintenance service package