University of Massachusetts at Amherst
Environmental Seminar Series
Presents
To discuss:
Water
Treatment Process Optimization
February 23, 2001, 3:35 PM
Overview:
Steps taken between 1995
and 2000 to improve MWRA’s disinfection and corrosion systems will be
presented. The lessons regarding
process, control and operations engineering that the water industry can learn
from these experiences will also be addressed.
Finally, the work needed to improve process management will also be
discussed.
Based on his substantial experience in
the field, Mr. O’Day will share his thoughts on the “fragmentation between
professionals in our current approach to process design, construction and
operation which limits the overall quality of treatment plant operation.” He will also share his ideas on skills that
he feels will be helpful to us in our careers if we choose to enter the field
of water supply.
Tell me more:
MWRA provides eastern MA residents with water from
two primary sources, the Quabbin and Wachusett Reservoirs. This water is treated and distributed to the
consumer through a series of reservoirs, storage tanks, and pipes. To learn more about the chain of events,
click the Quabbin:
Source: http://www.mwra.com/water/html/wat.htm
During this lecture, Mr. O’Day will discuss his
experiences at MWRA including:
·
Total coliform (TC) level issues in 1995 which resulted
in a decision for action to correct deficiencies in the existing disinfection
system in 1996 rather than wait until new facilities were constructed in 2004
·
Reconstruction of the Norumbega chloramination
facility
·
Startup of the interim disinfection at Cosgrove
facility
·
Balancing increased DBP formation with the need for
primary disinfection
·
Ultimate elimination of the TC issue
·
Startup of the Cosgrove Disinfection Facility
·
MWRA meets 3-log giardia CT requirements for first
time
·
Remote monitoring of the facility from Western
Control Center
·
Addition of soda ash and CO2 to increase
alkalinity and pH
·
Improved corrosion control has reduced lead levels
·
Process Optimization
·
(Interim Corrosion Control (ICC) Facility)
·
Used a statistical process control and process
optimization program to identify and correct process disruption sources to
control pH
·
Improved algae monitoring and treatment strategy
·
Chloramination process optimization studies
·
Stabilize residual
·
Avoid nitrification issues
·
Reduce chlorine taste/odor complaints
This page created by:
Jennifer Mackey, with information provided by K. O’Day, 2/17/01