The Influence of Membrane Treatment on Bacterial Regrowth Potential in Drinking Water

EPA Grant Number: U915159
Title: The Influence of Membrane Treatment on Bacterial Regrowth Potential in Drinking Water
Investigators: Escobar, Isabel C.
Institution: University of Central Florida
EPA Project Officer: Lee, Sonja
Project Period: August 1, 1997 through May 1, 2000
Project Amount: $102,000
RFA: STAR Graduate Fellowships (1997) RFA Text |  Recipients Lists
Research Category: Fellowship - Environmental Engineering , Academic Fellowships , Engineering and Environmental Chemistry


The impacts of membrane treatment on Assimilable Organic Carbon (AOC) or Biodegradable Dissolved Organic Carbon (BDOC) levels in drinking water pipe networks in full-scale distribution systems has had little investigation. The main objective of this research project is to collect and analyze full-scale distribution system data to quantify itshe response to the introduction of membrane treatment, which affects the AOC and BDOC of the drinking water, with respect to its impact on bacterial regrowth potential in the systems.


Two water treatment plants (WTP), Palm Beach County Water Utilities Department's WTP #3 and #9, treat the same raw water source via membrane filtration and lime softening, respectively. These two plants were monitored monthly for one1 year to compare the effects of membrane filtration on distribution water biostability. Samples taken from the distribution systems were analyzed for AOC using Pseudomonas flouorescens P17 and Spirillum NOX, BDOC, UV absorbance at 254 nm, temperature, residual disinfectant, pH, turbidity, heterotrophic plate counts, and coliform counts.

Supplemental Keywords:

fellowship, membrane filtration, assimilable organic carbon, (AOC), biodegradable dissolved organic carbon, (BDOC), drinking water, biostability., RFA, Health, PHYSICAL ASPECTS, INTERNATIONAL COOPERATION, Water, POLLUTANTS/TOXICS, Risk Assessments, Physical Processes, Drinking Water, Microorganisms, health effects, monitoring, pathogens, bacteria, exposure, membrane filtration, community water system, human exposure, environmental chemistry, drinking water contaminants, drinking water treatment

Progress and Final Reports:

  • 1998
  • 1999
  • Final