Patapsco Wastewater Treatment Plant
Location: Baltimore, MD, Maryland
Client: City of Baltimore DPW
Aerial View of Entire Treatment Plant
JMT has completed planning and design services for numerous
assignments at Patapsco WWTP.
Over many years, JMT has provided management, study and
evaluation, engineering design, preparation of construction cost
estimates, and construction administration for a variety of
projects at the 87.5 MGD Patapsco WWTP. A sample of these
projects include:
Oxygen Reactor Rehabilitation. Specific design
activities included concrete tank rehabilitation, aerator gear
drive replacement, ABB process controls and instrumentation design,
new influent and RAS flow metering and control, mechanical
equipment and electrical power.
Low-Level Facilities Design. This work included
hydraulic modeling of the low level sewer, influent fine screen
(6mm) design, MCC modifications including VFD addition, ABB process
controls and instrumentation enhancements. The construction
of this project was completed 45 days ahead of schedule with $0 in
net change orders, demonstrating JMT's ability to design
improvements to large WWTPs taking into account the challenges of
construction with large diameter pipes and major pieces of
mechanical equipment.
Return Sludge Pump Station No. 1
Rehabilitation. JMT design efforts included
hydraulic separation of the plant's four clarifiers with a new
dedicated piping and pumping system, five new 100 hp return and two
40 hp waste activated sludge pumps, chemical feed pumps, motor
control centers, VFD's, valve actuators, flow meters and the ABB
process control system. A building addition was required to
accommodate the MCC's. This design allows greater control of
the secondary clarifier sludge blankets thereby providing the
operations staff with more control over the process.
ENR Upgrades Study and 30% Design. This
involved a planning effort and a 30% design associated with the
plant-wide ENR upgrade, necessitated by the City's Consent Decree
with the U.S. Environmental Protection Agency.
ENR Upgrades to Existing Facilities. JMT
has provided upgrades of existing primary and secondary unit
processes, including oxygen aeration reactors, secondary
clarifiers, primary settling tanks, primary sludge pumping
stations, fine screens, and chemical feed systems. Ancillary
activities included power distribution, yard piping, building
construction, and ABB Process Controls System.
These and other projects have resulted in the renovation or new
construction of hundreds of millions of dollars in plant
improvements.
« Go Back