Determining sensitivity for MF and UF system is one of the more complex aspects of regulatory compliance under the LT2ESWTR. This presentation will address the considerations associated with determining the Log Removal Value (LRV) of a MF/UF membrane system under the guidelines established by the rule. The discussion will focus upon the Pressure D...

Presents an overview of procurement optoins for membrane project, primary target is a municipal entity making the purchase. Dicsusses specification and contract language...

This paper discusses efforts at West Basin to review specifications for some the latest generation of pressurized MF/UF modules and interchangeable formats for possible use in the future. Pilot plant data is presented. They found that there is a substantial level of consistency among PVDF current product...

This paper describes pilot testing at the San Patricio Municipal Water District (SPMWD) to quality a Scinor membrane module for use for a retrofit and expansion at the plant. The plant wanted to evaluate alternative membranes that could be used as replacement for the currently installed membranes. Pilot procedures and data along with analyses are p...

The results of the pilot testing of 6 different membrane module evaluated over the past year will be presented and discussed. The presentation will focus on the variations of backwashing and cleaning strategies used to treat the water, and will discuss the differences in membrane fouling rates that occur as a result of operation on secondary efflue...

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 ...

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...

California has implemented a 12-10-10 log removal requirement for virus, Giardia, and Cryptosporidium for IPR projects which must be demonstrated. Conductivity and TOC being used as on-line indicators to determine compliance. However these processes lack the sensitivity to accurately measure the actual log reduction for pathogens. It is suggested t...