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Water and Wastewater Plant Directory
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Halifax, Nova Scotia, Canada
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Aerotech Park/Airport Services WWTP
Halifax Regional Municipality
P.O. Box 1749
Halifax, Nova Scotia, B3J 3A5
Canada
Contact Information:
Contact: R. Reid
Email:
reidr@region.halifax.ns.ca
Telephone: 902-490-4000
Fax:
Plant Operation: Municipal
Processing: Wastewater
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Web site:
http://www.region.halifax.ns.ca/Works/wwt/aerotech.html
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Plant/Process Description:
The Wastewater Treatment Division of
Environmental Management Services operates and
maintains water and wastewater services for the
Aerotech Industrial Park and Halifax
International Airport area. Aerotech Park
officially opened in 1987.
Water Treatment:
This facility designed by Gore and Storrie is
capable of producing 1.7 million gallons/day of
domestic water. As raw water from Bennery Lake
enters the main treatment plant, lime and carbon
dioxide are added to adjust the pH and reduce
aggressiveness (corrosive tendency) of the water.
A coagulation process is initiated by the
addition of alum (aluminum sulfate) which forms a
chemical precipitate or floc. The flocculation
process is accomplished by a series of slow
mixing baffled tanks which allow the coagulated
particles to gather into larger settleable
particles. The process flow proceeds to a
clarifier to allow settling of heavier floc and
suspended particles.
The filtration stage then removes remaining floc,
and remaining impurities (silt, bacteria,
plankton) by passing the water downward through a
bed of anthracite (3'), sand (3'), and fine
gravel (3'). Following filtration, chlorine is
added to the treated water for disinfection
purposes. Any pathogenic bacteria present are
destroyed. A small amount of sodium carbonate or
sodium hydroxide is applied for final pH
correction.
Wastewater Treatment
The Aerotech WPCP, designed by Porter Dillion
Ltd., is a 300,000 gpd secondary treatment
process consisting of preliminary treatment,
primary clarification, rotating biological
contactors, secondary clarifiers, and post
chlorination. Other features include aerobic
sludge digestion, nitrification, and phosphorus
removal. Plant effluent is discharged to the
Johnson River system.
Aerotech Biosolids Lagoon
This facility was designed by CBCL Ltd. and
commissioned in 1989. Approximately 3 million
gallons of Halifax Regional Municipality
treatment plant digested sludges and 3 million
gallons of home septic tank wastes are
transported and deposited at this location each
year. The 7 million gallon capacity allows the
biosolids to further reduce and stabilize by
anaerobic and facultative microbial action. On
site staff monitor all discharges by means of a
waybill system and effluent analyses in order to
ensure regulatory and HRM compliance
standards.
Effluent or displaced liquid from the Biosolids
Lagoon is further treated at the Aerotech Park
Water Pollution Control Plant prior to
discharge.
Biosolids Transport
HRM operates and maintains a 5,000 gallon tractor-
trailer unit for the purpose of transporting
treated biosolids (sludge) from HRM treatment
plants to the Aerotech Lagoon.
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Owner:
Halifax Regional Municipality
Web site:
http://www.region.halifax.ns.ca/
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Operating Company:
Halifax Regional Municipality
Web site:
http://www.region.halifax.ns.ca/
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Directions:
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Disclaimer:
Water and Wastewater.com provides the information on
this page for reference purposes only. We do not certify
the accuracy of the information provided by third-party
individuals for this listing.
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