IDNR Rules Update & Regulatory Considerations for Membranes in Iowa
Membranes are used widely to treat drinking water in Iowa. This presentation provides an overview of low and high pressure membranes used in Iowa, the water quality of various aquifers, regulatory requirements, pilot protocol and testing, and design considerations. This presentation will also include a brief IDNR General Rules Update.
Grimes Reverse Osmosis Water Plant
New 3.5 MGD reverse osmosis plant introduction and overview. Experiences of starting up a new reverse osmosis plant including the trains themselves, chemical feed systems, pumps for distribution, and overall building systems. Grimes need for more water production was the reason for the new, larger reverse osmosis plant. Remodeled 1.4 MGD lime softening plant for […]
Understanding Salt Rejection the Path to a Healthy Membrane Life
This presentation is all about membrane rejection, how to calculate it, where to sample for it, and what the numbers are telling us. Knowing how to collect and analyze this information on a RO membrane system will allow an operator to setup a conductivity profile and then a rejection profile for all parts of the […]
Town of Walkersville, Maryland Integrated Membrane Water Treatment Plant
The ground water wells in town of walkersville were known to be under the influence of surface water. In 1999, a rupture in a sewer line caused over a million gallons of raw sewage into the Town’s well aquifer, causing plant shutdown, boil water notices, and pumping raw water to the sewer system for weeks. […]
Mid-West Membrane Projects: Lessons Learned from Pilot Study and Full-Scale Start-Ups
Learn about some common and not so common trials and tribulations of conducting RO/NF pilot studies and starting up full-scale RO/NF water treatment plants. The RO/NF process and the science behind it doesn’t change, but every project is unique in design as far as size, feed water source, pretreatment, piping arrangement, instrumentation, etc. which can […]
Pilot Study and Full-Scale Implementation of Greensand Filtration & Reverse Osmosis at Prestage Foods
This presentation covers the pilot study or iron removal filtration followed by reverse osmosis and the subsequent full scale system design and implementation at Prestage Foods in Eagle Grove, Iowa. This treatment system was to provide all site water requirements for the new Prestage pork processing facility. The challenges with iron removal and fouling of […]
Options for Expanding the Des Moines Saylorville Membrane Filtration Plant
This case study will describe the options considered for capacity expansion of Saylorville WTP in Des Moines, IA. The facility currently has submerged MF/UF filtration with a side stream RO system for softening. The alternatives analysis used a decision matrix which included capital and life cycle cost as well as non-economic factors to recommend long […]
Fargo 15 MGD Integrated Membrane WTP: Pilot Study, Design, Operation and Optimization
The City of Fargo, ND, owns and operates a 15 MGD membrane WTP that treats surface water that has high fouling potential: 8-16 mg/L organics, TDS up to 1,000 mg/L, and wide temperature swing 33-85 °F. The plant faces various challenges through seasons: pretreatment upsets (poor settling) and high operating pressures in winter and spring, […]
PFAS Contamination and Current Solutions
PFAS Contamination is becoming a larger issue as more source waters are being detected with trace amounts to high levels of contamination. Membrane filtration is a viable option, but creates other issues that require complimentary filtration equipment. How to help smaller municipalities that may struggle for capital funding for treatment systems gain access to government […]
Ceramic Pilot Testing for Potential Use in a 10+ Year Old Polymeric Membrane Plant
The Mandaree WTP has been using pressure UF membranes for 10+ years. As the modules reach the end of their life, and in consideration of increased plant capacity a ceramic membrane pilot was completed. This presentation will present the results of the pilot study.
