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High Recovery Reverse Osmosis (HRRO): Expert Guidance on Optimizing System Performance
Episode 393
We're focusing on High Recovery Reverse Osmosis (HRRO) with insights from Ken Robinson, Director of North America Application & Sales at Avista Technologies. With over 40 years of experience in membrane technology, Ken sheds light on how HRRO is transforming water treatment and tackling industry challenges. Here are the key highlights from our conversation.
What is Reverse Osmosis (RO)? Ken describes reverse osmosis as a method for rejecting dissolved minerals and macro-organics from water. He stated, "Today's systems, most of them are using what they call a thin film composite membrane, which are categorized into seawater, brackish, and low-energy membranes, along with an offshoot called nanofiltration." These systems achieve remarkable efficiency, with a rejection rate of around 99%, leaving only a minimal amount of dissolved minerals in the purified water.
What is High Recovery Reverse Osmosis (HRRO)? HRRO is designed to maximize water recovery and minimize waste, making it a game-changer for water treatment. According to Ken, "40 years ago, recovery limitations were dictated by the chemistries. Today, advances in antiscalant technology allow for much higher recovery rates." This technology takes the concentrate from conventional RO systems and processes it further, increasing efficiency and sustainability.
Industries Leading the Way Initially adopted in industrial settings, HRRO is now gaining traction in sectors like municipal water treatment, food and beverage production, and power generation. Ken emphasized that "the growing focus on sustainability and regulatory compliance is driving broader adoption of HRRO systems."
Ensuring Successful Operations To ensure HRRO systems function optimally, it's crucial to define feedwater quality parameters and anticipate variability. Ken stressed the importance of training operators, noting, "There always seems to be a disconnect between applications and salespeople developing ideas. Misunderstandings arise when people don't understand the behavior of water as it concentrates."
To effectively tackle any challenges that arise, Ken recommends the following steps for operators:
- Define Feedwater Quality Parameters: Establish clear benchmarks for feedwater quality, including turbidity, pH, total dissolved solids (TDS), and any specific contaminants. This baseline will help identify any deviations that may affect system performance.
- Implement Regular Monitoring: Operators should capture data at regular intervals. This includes monitoring system pressures, flow rates, and recovery rates. Keeping an eye on these metrics will allow operators to identify trends and detect any anomalies early on.
- Normalize Collected Data: Regularly normalize the collected data to account for variations in operating conditions. By adjusting the data for factors such as temperature or seasonal changes, operators can gain clearer insights into system performance and efficiency.
- Train Operators on Water Behavior: Provide comprehensive training for operators that focuses on understanding how water behaves during the concentration process. As Ken pointed out, "water is very predictable in how it behaves," so operators need to recognize the symptoms of potential issues and understand their causes.
- Foster Open Communication: Encourage collaboration among team members, especially between operators and tech
Published on 1 year, 1 month ago