Operation And Maintenance; Pumping; Sewage Collection; Sludge Disposal - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

3 OPERATION AND M AINTE N ANCE
3.1

PUMPING

The system includes several pumps for the operation of the STP. All pumps are regularly inspected by
the Operator who will ensure the pumps continue to operate efficiently and will address any
deficiencies. If the pumps require maintenance, the Operator will report the situation and take
appropriate action. Some of the pumps are installed with a standby unit that allows the Operator to
switch from one pump to the other if necessary. In some specific situations, it may be necessary to
temporarily shutdown the STP for servicing of the equipment.
A preventative maintenance program, as recommended by the pump supplier, will be followed to ensure
the pumps are always kept in good working order.
3.2

SEWAGE COLLECTION

The sewage from the kitchen must pass through a grease trap (or similar facility for grease/fat removal).
The large amount of oil and fat can harm treatment facility (e.g., clogging pumps and piping and cause
foaming in the aeration tank). To avoid premature membrane fouling, maximum O/G concentrations
should not exceed 30 mg/L.
The raw wastewater should not contain any of the following substances:
Hydrocarbons – lubricants, gasoline, diesel, etc.;
Paints, solvents, silica, silicon and polymers;
Antibacterial solutions and products with quaternary ammonia;
Large quantities of chemicals such as water softener, disinfectants, strong acids & alkalis,
pesticides or photographic chemicals;
Silicone based defoamers;
Non-biodegradable solid waste (plastic, rubber products, disposable diapers, etc.);
High amount of metals, such as iron, magnesium, calcium, barium and strontium.
3.3

SLUDGE DISPOSAL

Sludge will be disposed at Amaruq or Meadowbank site in the Waste Rock Storage Facility or the
Tailings Storage Facility (Meadowbank only) or in a landfarm as a nutrient amendment as per the Water
License Part F Item 3.
3.4

CONTROL

MBR (Membrane Bioreactor) treatment technology is an effective combination of an activated sludge
biological treatment process with MBR membrane filtration technology. The STP can be operated in
either manual or automatic mode. The system is designed to always run in auto mode. The manual
option is provided mainly for maintenance purposes.
STP's control and automation system is based on several instruments measuring key parameter of the
process, combined with a PLC. The STP don't require continuous operator intervention except for daily
inspection and maintenance. The user interface can be accessed on-site from the control panel
mounted touch-screen HMIs or remotely from a computer. Alarm messages can be set up to alert
operators to issues.
Operation & Maintenance Manual
Sewage Treatment Plant
December 2018
21