AquaScraper Series C / SL / R Clarifiers



Aquatec Maxcon is one of Australia’s most experienced manufacturers of scraper clarifiers with a long-standing manufacturing record spanning 50 years. Since building our first AquaScraper in the 1970’s, Aquatec Maxcon has been committed to continuous research and development in design and performance delivering  the most efficient technology available. Gravity sedimentation is one of the most frequently used processes in wastewater treatment.

Many wastewaters contain settleable suspended solids that can be removed under quiescent conditions. Particles that have a different density from that of the suspension medium (water), will settle downward because of gravity or rise to the top because of buoyancy.

In other cases where suspended materials do not settle readily, upstream unit processes are used to convert colloidal (nonsettlable suspended solids) and soluble pollutants into settleable suspended solids for gravity sedimentation removal. Suspended solids removal is important because of the pollutants associated with the removed solids, such as organics, nutrients (nitrogen, phosphorus), and heavy metals.

Series C

AquaScraper Series C - Peripheral Drive (PD) & Central Drive (CD) Bridge

The AquaScraper Series C caters for all circular tank designs. The design incorporates either a centre drive (CD) or a peripheral drive (PD). Circular bridges can vary in size from a few metres up to 50m in diameter. Can be supplied in mild steel (epoxy coated and/or hot dipped galvanised), stainless steel, aluminium or composite materials

Appropriate for several design applications:

Design Advantages

Diagram 1

Series SL

AquaScraper Series SL - Suction Lift

The AquaScraper-SL operates with a series of riser pipes fed by a hooded V scraper gliding across the tank floor. Collected settled sludge discharges from the riser pipes hydraulically through a control gate into a trough formed by the base of the bridge. Sludge then drops into a central discharge to feed the return sludge pump station. As the bridge trough is submerged within the clarifier, the discharge of sludge is driven purely by the hydraulic difference in water level between the clarifier and bridge trough.

Design Advantages

SL 2

Series R

AquaScraper Series R - Rectangular

We have built many custom design rectangular scraper mechanisms over the past 70 years to suit our client’s site specific requirements. R Series Scraper Mechanism Types include:

1. AquaScraper R - CF Chain and Flight

2. AquaScraper R - RF Stainless Steel Rope and Flight

3. AquaScraper R - TB Travelling Bridge

4. AquaScraper – Stainless Steel Rope & Suction Header

5. AquaScraper – Reciprocating Wedge Bottom Scraper



Design Features

Flow enters the feedwell zone where heavy sludge immediately settles into the sludge hopper and scum floats to the top. Scum exits through ports in the feedwell whilst lighter particles settle to the tank floor as flow moves to the peripheral outlet weir. Floating scum is collected via a skimmer blade running from the feedwell to the scum baffle located near the peripheral weir. Settled sludge is scraped into the central collection hopper.

Key Installations

 Oxley WWTP

Oxley WWTP
Peripheral Drive Clarifier

 Tully STP
Tully STP
Secondary Clarifier 
 Lower Molonglo STP
Lower Mologlo STP
Secondary Clarifier 
 Luggage Pt STP
Luggage Point STP
 Werribee STP
Werribee STP


Aquatec Maxcon has 50 years of experience in treating water and wastewater for both municipal and industrial applications. A leader of the water industry, Aquatec Maxcon has introduced a range of innovative process technologies to Australia including the first UASB, IC Reactor, Membrane Bioreactor and Circox Reactor. We have a successful track record in introducing new technologies, and have diligently supported their implementation within Australian conditions.

Aquatec Maxcon Pty Ltd is part of the Aquatec Maxcon Group which provides a complete vertically integrated range of in-house services including:

Aquatec Maxcon has established and maintains a dedicated service department for scheduled maintainence and breakdown services.

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