Presentations by Mehul Patel, PE
Matches: 9
Why Operating Membrane Plants Can Drive You Nuts - Operation of the 70 MGD GWR Systems
The orange County Sanitation District operates a 70 mgd water reuse facility. The plant treats secondary effluent with MF/RO/UV-AOP/Lime and injects into the ground for indirect potable reuse. Each of the process treatment trains have had operational issues after start-up. This paper describes the issues and the solutions to these problems....
MF/UF Basics
This presentation provides a comprehensive background and terminology definitions for low pressure membrane unit processes. It covers backwash Clean in Place, Membrane Integrity Testing and other operational considerations for Micorfilation and Ultrafiltration membrane systems....
Use of Membrane Processes for Reuse - The Orange County California Experience
This PowerPoint presentaton describes that Orange County Water District use of membranes for indirect potable water reuse....
Source Water Control Strategies to Ensure Treatment Reliability at Orange County Water District's Groundwater Replenishment System
Orange County Water District's (OCWD) Advanced Water Purification Facility (AWPF) treats secondary municipal wastewater effluent using MF, RO, and ultraviolet (UV) and hydrogen peroxide in an Advance Oxidation Process (AOP). Source water variations can impact performance and reliability by operation of secondary biological treatment trains and by ...
GWRS - The World's Largest Indirect Potable Reuse Facility
The Orange County Water District's (OCWD) Groundwater Replenishment System (GWRS) is a 100 mgd indirect potable reuse facility located in Fountain Valley, California. This facility has been in operation since 2008 and was recently expanded from 70 mgd to 100 mgd after a three year construction project completed in June 2015. This facility treats ...
Three Years Piloting of Osmotic MBR for Potable Reuse: Performance and Life-Cycle Assessment
This paper describes a hybrid ultrafiltration forward osmosis-osmotic membrane bioreactor (UFO-MBR) as a multi-barrier reuse technology that has been studied at the pilot level continuously in the last three years. UFO-MBR treatment has been shown to almost completely remove conventional wastewater contaminants (carbon, nitrogen, and phosphorus) an...
Energy Recovery Devices, Membrane Flux Balancing and Net Energy Consumption For Recycled Water - A Full Scale Evaluation
At the Orange County Water Districts Groundwater Replenishment System, 6 - 5 mgd Reverse Osmosis units have been recently installed to provide an additional 30 mgd of treatment capacity. The units are configured in a 77:49:24 array with an Energy Recovery Device located between the first and second stage. The system was also designed with a bypass ...
Monitoring of RO Systems for Regulatory Compliance in Advanced Treatment Systems
The purpose of the paper is to discuss water quality monitoring practices that are associated with the operation of RO systems at Advanced Treated (aka Recycled) Water Facilities. Conventional regulatory approaches with regard to the use of surrogate indicators of operational performance (e.g., permeate conductivity, TOC) are affected by variations...
A "New" Water Source: Decades of Potable Water Reuse in California
Reuse in California has been a key part of the water supply for decades. The introduction of advanced treatment technologies such as microfiltration, reverse osmosis and ultraviolet light has allowed indirect potable reuse to thrive in the state. California's history of indirect potable reuse using membrane technolgies will be highlighted with pr...