Presentations by Freese and Nichols, Inc.
Matches: 8
Tracking Membrane Operations in Texas Public Water Supplies? What's Driving the Market?
This paper presents a listing of membrane facilities in Texas, using the Texas Commission on Environmental Quality (TCEQ) and Texas Water Development Board (TWDB) data bases along with research investigations of facilities not listed. A unique insight is offered into how membrane technology is rapidly developing in Texas and what is influencing fac...
Improved Concentrate Recovery for Reverse Osmosis Treatment of Brackish Groundwater
The cost of concentrate disposal has been reported to be the highest operational line item (up to 70%) for inland brackish groundwater RO (BWRO) processes. Antiscalants are used to prevent precipitation on the RO membrane surface and improve recovery, but their range is limited. This research focused on a side-stream treatment to oxidize and inac...
Membrane Pilot for a Direct Reuse Application: Engineering an MF/UF & RO Pilot
This paper describes the pilot testing at Big Spring, Texas for direct reuse application. Microfiltration, ultrafiltration dn reverse osmosis was studied....
Microfiltration and Conventional Treatment - Teaching and old dog new tricks! Lessons learned from an integrated Water Supply in Brown County, Texas
Brown County Water Improvement District No. 1 (BCWID) is a wholesale supplier of raw water from Lake Brownwood used for irrigation and treated water used for municipal purposes. To meet increasing demand, an additional 7.5 MGD capacity was identified in 2001. In the summer of 2003, a microfiltration (MF) system was selected for pilot testing to ev...
Membrane Pilot for a Direct Potable Reuse Application: The Process of Permitting the Process
The purpose of this paper is to describe the permitting process associated with reclaiming wastewater effluent to be further treated into potable drinking water. Because of the risks associated with this concept, the permitting process became an important step in a string of equally important engineering tasks. The permitting process of the Big Spr...
Energy Savings and Production Gains by Retrofitting Existing BGD Facilities in the Lower Rio Grande Valley
The North Alamo Water Supply Corporation (NAWSC) completed a Feasibility Study of Energy Efficient Alternatives for Brackish Groundwater Desalination (November 2018). The study identified energy-efficient options for developing new desalination supplies while reducing desalination energy requirement by 50 percent. In 2019, NAWSC implemented a pil...