|Use of Ozonation in Combination with Nanocrystalline Ceramic Membranes for Controlling Disinfection By-products
Masten, Department of Civil and Environmental Engineering; Melissa
Jane Baumann, Department of Chemical Engineering and Materials
Science; Simon Davies, Department of Civil and Environmental
Karnik, Nikhil Theyyuni
The objective of this study is to determine the feasibility of using
a combined ozonation and membrane filtration system to control disinfection
by-products (DBPs) precursors in drinking water treatment process. Conventional
ceramic membranes and ceramic membranes coated with a nano-crystalline
catalyst that decomposes ozone are being used in this study. The particular
The fouling experiments indicate that, in the absence of ozonation,
a decline in permeate flux over time occurs. The injection of ozone
just prior to filtration results in a recovery of the flux to about
85% to 90% of the initial flux. The effects of ozonation resulted in
the degradation of NOM and caused changes in the NOM structure, which
reduced the reactivity of the percursors of disinfection by-products
towards ozone. With an ozone concentration of 1.5 g/m3 and a 1 kD membrane,
water from Lake Lansing, a borderline eutrophic lake with a TOC ranging
from 8-12 mg/L, was treated to meet water-quality requirements of the
Stage 2 D/DBPs Rule.
- To develop methods for the preparation of a nano-crystalline ceramic
membranes which catalyze the decomposition of ozone and foulants and
to characterize these membranes.
- To determine the effect of ozonation on membrane fouling in filtration
systems using both conventional and catalytic membranes.
- For the source waters studied, determine the effect of ozonation
on the properties of natural organic matter and relate this information
to the overall performance of the system.
- To investigate the effect of control parameters on the fouling rate
and product water quality using selected conventional and catalytic
We expect to develop and demonstrate that treatment using catalytic
nano-crystalline ceramic membranes in combination with ozonation is
more effective than conventional methods, including ozonation, and
other membrane processes in terms of operational performance and removal
Resulting Publications / Presentations
- Karnik BS, Chen KC, Jaglowski DR, Davies SH, Baumann MJ, Masten SJ. Combined
Ozonation-Nanofiltration for Drinking Water Treatment. Presented at
the 78th American Chemical Society Colloid and Surface Science Symposium,
Yale University, New Haven, CT, June 20-23, 2004.
- Karnik BS, Chen KC, Jaglowski DR, Davies SH, Baumann MJ, Masten SJ. Effect
of combined ozonation-nanofiltration on water quality. Presented at
the 228th American Chemical Society National Meeting - Oxidation and
Reduction Technologies for Water Treatment, Philadelphia, PA, August
- Karnik BS, Davies SH, Chen KC, Jaglowski DR, Baumann MJ, Masten SJ. Effects
of ozonation on the permeate flux of nanocrystalline ceramic membranes.
Water Research 39, pp 728-734, 2005.
- Karnik BS, Davies SH, Baumann MJ, Masten SJ. The effects of combined ozonation
and filtration on disinfection byproduct formation. Water Research
39, pp. 2839-2850, 2005.
- Karnik BS, Davies SH, Baumann MJ, Masten SJ. Fabrication of catalytic membranes
for the treatment of drinking water using combined ozonation and ultrafiltration.
Submitted to Environmental Science and Technology, 2005.
- Investigate other membrane materials that may be better catalysts of ozone decomposition
- Improved understanding of the effects of operational conditions (e.g. ozone
dosage, TMP) on performance
- Studies using models foulants, e.g., polysaccharides, silica, humic materials
- Investigate the fate of other DBPs, e.g., bromate