This presentation will introduce basic membrane related terms, concepts and related calculations....

This presentation covers the approval process and ongoing monitoring requirements for membrane water treatment plants in North Dakota. The intent of this talk is to describe how the North Dakota Department of Environmental Quality (NDDEQ) evaluates membrane treatment technology performance and what the NDDEQ requires of public water systems to achi...

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...

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....

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 o...

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, and water availability....

This presentation will provide an overview of Fargo Water Treatment Plant (WTP). In 2019, Fargo completed the construction and startup of a new 15-MGD Membrane WTP (MWTP). The MWTP employs Ultrafiltration (UF) and Reverse Osmosis (RO) to help treat two different water sources that are typical high in total hardness and total dissolved solids (TDS)....

The City of Bozeman built a 22 MGD microfiltration plant in 2014 to meet the demands of a growing city. The plant is built to basically plug and play additional treatment equipment for 36 MGD. The current demand averages 5 MGD with peak demand in the summer of just over 9 MGD. As a result of this the plant is vastly overbuilt for the current flows ...

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 in drinking water plants worldwide b...

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,...

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 a...

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....

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 de...

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....

Two Decades of successful operation of the DRUC low-pressure membrane facility have demonstrated that membrane filtration is clearly a normal, not novel process that can be cost effective and extremely reliable. Optimization of the process over the first few years of operation yielded significant power and chemical savings. Fouling trends demonst...