CITY OF EAST ANGUS

CITY OF EAST ANGUS - CASCADES
WASTEWATER PURIFICATION STATION
AND PUMPING STATION

CLIENT
City of East Angus - Cascades

LOCATION
East Angus

DURATION
1993 - 1994

PROJECT CHARACTERISTICS
Wastewater purification station

	Large, deep aerated ponds (6 and 7 metres, 150 000 m³).
	Disinfection of elevated Ph level municipal water with the help of paper mill waters.
	Average flow of water to be treated: 15 100 m³/d.
	Acclimatized DBO 5 load: 6 250 kg/d (115 000 equivalent persons).
	Aeration by lined air jets in the fully mixed pond, and by floating aerators in the two partially mixed ponds.
	Sludge drainage by a floating dredger of settling cells and ponds.
	Settling cells for primary sludge and elevated-PH level disinfection (2 x 5 000 m³).
	Neutralization of sulphuric acid.
	Aerated ponds (one fully mixed and two partially mixed).
	Sludge storage ponds.
	Sludge drainage by a floating dredger.
	Discharge measurement by magnetic flow meter and Parshall flumes.

Pumping station

	Dry-well pumping station
	Discharge: 27 000 m³/d.
	Three pumps of 150 HP.
	Design (anticorrosion) caused by industrial waste.
	Fibreglass force main.
	Anti-water hammers pneumatic valves.
	Emergency basin for accidental overflow.

SERVICES RENDERED

	Water treatability studies.
	Preliminary studies.
	Working dimensions.
	Working drawings and specifications.
	Cost estimates.
	Supervision during works.

PROJECT DESCRIPTION

	Grade 316 stainless steel pumps, tubing and accessories.
	Protection of concrete against pH level 3 caused by high temperatures during cleanup of fibreglass force main.
	Installation of a conductivity system to control accidental overflow.