Metro - ECCV Zero Liquid Discharge Pilot Study_Application

Home Browse Search

SWSI identified that much of the high quality water on the Front Range that can be treated with conventional methods has been appropriated. Agricultural sources of water, whether a traditional or alternative transfer, will have a large part in addressing Colorado's future water supply "gaps." Many of the future agricultural transfers will involve the diversion and pumpback of lower quality water. In addition, M&I users will also seek to recapture their reusable return flows for use in their potable water systems. Membrane treatment will be one of the primary water treatment technologies used to produce potable water from these lower quality sources. Without the ability to effectively treat these lower quality sources and produce safe esthetically acceptable potable water, there could be significant M&I water shortages in the state. (Material excerpted from Colorado Water Conservation Board. 2004. Statewide Water Supply Initiative. http://cwcb.state.co.us/IWMD/ Pubs.htm). Water Supply Reserve Account Eligibility and Evaluation Criteria The East Cherry Creek Valley Water and Sanitation District (ECCY) serves approximately 50,000 people in the eastern portions of the City of Centennial and unincorporated Arapahoe County. ECCY is a Colorado Special District governed by Colorado Revised Statute Title 32. The Board is elected by the registered voters of the District. ECCY's proposed pilot plant study is an eligible water activity as defined by Senate Bill 06-179. Grant funds will be used to analyze the needs of a structural water project to develop a renewable water supply for ECCY. The pilot study also meets the following evaluation criteria: ~ Promoting collaboration and cooperation - Membrane treatment will be needed to address water supply gaps across the Front Range. Results of this pilot study can be built upon so that ZLD technologies can be applied at a larger scale and benefit Front Range water providers. ~ Facilitating water activity implementation - Conducting a pilot study of ZLD technologies will reduce the uncertainty of using this technology to meet demands of Front Range water providers. ~ Meeting water management goals and objectives and identified water needs - Because many Front Range providers have stated that reuse and traditional or alternative agricultural transfers are part of their Identified Projects and Processes, membrane treatment and ZLD technologies will be needed to meet the gap identified in SWSI. ~ The water activity address issues of statewide value - Piloting ZLD technology will ultimately lead to the maximum utilization of state waters. Zero Liquid Discharge Pilot Study Overview This project involves pilot testing commercially available equipment for achieving a ZLD. A minimum of two treatment alternatives to be piloted. This pilot study will specifically address capital and operating costs associated with two ZLD technologies for treatment and disposal of reverse osmosis (RO) concentrate streams, thereby allowing Metro basin water providers to better fully understand the implications of residuals management associated with RO treatment.