Membrane System Pretreatment: Objectives, Options and Operations
This presentation provides an overview of pretreatment options for membrane systems. Typical raw water quality variations will be summarized along with the impacts of these variations on membrane systems. Options for pretreatment to adjust raw water quality will be described, along the with the operations of pretreatment systems, with emphasis on optimizing pretreatment chemistry.
Developing and Implementing a Membrane Cleaning Procedure
Membrane cleaning basics as it applies to micro, ultra Nano and reverse osmosis Membranes. when to clean how to determine that cleaning point, what cleaners to use and why. determining the effectivenesss of cleaning.
Incorporating Zeta Potential to Optimize Membrane Performance, Achieve Regulatory Compliance and Reduce Operating Costs
Automated zeta potential is rapidly expanding as a tool to regulate chemical dosing in water treatment plant processes. Zeta potential in combination with other inputs such as flow, pH, temperature and organics to minimize chemical cost and sludge disposal especially during rapidly changing conditions. This Presentation highlights incorporation of controlled zeta potential at a membrane […]
Grand Forks Regional WTP – An Innovative Facility for Modern Water Quality Challenges
The City of Grand Forks recently commissioned a green field WTP that was decades in the making. The layout and treatment systems of the new facility take into account the flashy water quality of both the Red Lake and Red Rivers to dampen the affects of several factors, including sulfates, taste and odor, hardness, turbidity, […]
No-Break Fiber Solves Membrane Integrity Problems at Five Water Treatment Plants
What do Byesville, OH, Two Rivers, WI, Butler, MO, Garden City, MO, and Amsterdam, MO have in common? They all have drinking water plants that were on the verge of crisis due to fiber breakage in their low-pressure membrane systems. That is, until they took a chance on a membrane that had been used extensively […]
Best Practices for MF/UF Cleaning – Examining Operating Plant Methods
Membrane filtration plants require chemical cleaning to maintain productivity. However, cleaning practices vary greatly among operating plants due to differences in manufacturers, needs of the system, and training of plant staff. This presentation examines cleaning practices from two operating plants to compare similarities, contrast differences, and outline several areas of improvement each have pursued to […]
RO Pretreatment in the Upper Midwest: What The Last 25 Years Has Taught Us
This presentation focuses on the different types of RO membrane pretreatment that have been used over the past 25 years in the Upper Midwest. The discussion covers both well water and surface water feed sources, and treatment processes such as UF/MF membranes, clarification/filtration, and iron/manganese management strategies. Case study examples are included.
A Case Study of OMND UF/RO Plant in Zap, ND
The presentation will detail the case study of OMND in Zap, ND. This UF and RO system, with secondary UF, began in 2012 after a demonstration pilot in 2010 proved flux and recovery rates were sustainable. The system was then expanded in 2014 to a finished water capacity of 5.2 MGD.
Designing MF/UF Systems for Low Maintenance: 10 Year’s Experience at Two North Dakota Installations
There is a tendency to to design ultrafiltration systems with as high a flux as possible to minimize capital costs without being too aggressive and making operation difficult. Another approach is to design conservatively with a low design flux, resulting in a higher capital cost but a lot lower maintenance membrane system. This presentation will […]
Wastewater vs Drinking Water Cleaning
During this presentation I will be showing some of the issues that I have encountered using wastewater in a membrane plant. I will show some of the differences between a drinking water membrane plant and a wastewater membrane plan.
