Pilot Testing for Validation of Log Removal Credit for Reverse Osmosis and Nanofiltration Membranes
Application of potable water reuse in the U.S. has become more widespread to meet the water demand in areas with increasing population and dwindling water sources. Different treatment trains have been applied to ensure the proper log removals of pathogens and protozoa are met and the water is safe for consumption. Reverse osmosis (RO) and […]
Pilot Testing for Validation of Log Removal Credit for Reverse Osmosis and Nanofiltration Membranes
Application of potable water reuse in the U.S. has become more widespread to meet the water demand in areas with increasing population and dwindling water sources. Different treatment trains have been applied to ensure the proper log removals of pathogens and protozoa are met and the water is safe for consumption. Reverse osmosis (RO) and […]
Full-Scale RO 3+ Log Removal of Virus Surrogates Using Native and Spiked Molecular Markers and Condusctivity Profiling
Advanced treatment trains for potable reuse in California are required to demonstrate high log removal values (LRVs) for Giardia, Cryptosporidium, and enteric viruses. Reverse osmosis (RO) is a key treatment step that contributes to the total required LRV credits. The RO system at the Orange County Water District (OCWD) Groundwater Replenishment System (GWRS) currently employs […]
Full-Scale RO 3+ Log Removal of Virus Surrogates Using Native and Spiked Molecular Markers and Condusctivity Profiling
Advanced treatment trains for potable reuse in California are required to demonstrate high log removal values (LRVs) for Giardia, Cryptosporidium, and enteric viruses. Reverse osmosis (RO) is a key treatment step that contributes to the total required LRV credits. The RO system at the Orange County Water District (OCWD) Groundwater Replenishment System (GWRS) currently employs […]
Demonstrating Greater LRVS Across NF and RO Membranes Results from Two Full Scale RO-Based Potable Reuse Treatment Facilities
California and other states are developing direct potable reuse (DPR) regulations and/or guidelines with high pathogen log removal value (LRV) requirements and in California reverse osmosis is required as one of the advanced treatment processes. Results from two full scale facilities that were part of the Water Research Foundation (WRF) 4958 project, testing native molecular […]
An Emerging Application for Low-Pressure Membranes: Treatment of Backwash Waste at Surface Water Treatment Plants for Potable Reuse
In this study, guidance is provided for applying microfiltration (MF) and ultrafiltration (UF) membranes to treat full-scale granular media filter (GMF) backwash water at drinking water plants. An example from the City of Melbourne in Florida is presented with the current approach to backwash water management at the full-scale along with a proposed approach to […]
Optimizing Organics Removal from Surface Water in a Coagulation / Ultrafiltration System
Surface waters contain inorganic and organic particulate substances that need to be addressed and potentially reduced for drinking water production. Inorganic particulate constituents are amongst others clay, silt and minerals. Organic particulate substances can include microorganism like viruses, bacteria and protozoa. One of the major problems of using surface water as source for drinking water […]
Freezing vs. Evaporation for Zero Liquid Discharge Desalination
The Evolution of High Recovery Reverse Osmosis to Achieve 95%+ Recovery
Increasing regulatory requirements and disposal costs around the world, as well as ESG mandates and incentives for recycling, are prompting industries to reduce their water and energy footprint, and highlight a growing need for innovation in reverse osmosis (RO) technology. Historically, it was challenging for conventional RO technologies to achieve recovery rates greater than 75% […]
The Evolution of High Recovery Reverse Osmosis to Achieve 95%+ Recovery
Increasing regulatory requirements and disposal costs around the world, as well as ESG mandates and incentives for recycling, are prompting industries to reduce their water and energy footprint, and highlight a growing need for innovation in reverse osmosis (RO) technology. Historically, it was challenging for conventional RO technologies to achieve recovery rates greater than 75% […]
