Sludge Treatment NewDesigned and manufactured by Maskoub — Egypt

SolidLiq

Name: SolidLiq
Brand: Maskoub International

Centrifuge Decanter — centrifugal sludge dewatering unit

SolidLiq is a horizontal centrifuge (decanter) that separates sludge from water at a centrifugal force of about 1,400 times gravity. It receives liquid sludge continuously, discharging concentrated sludge cake at one end and separated water, returned to the plant, at the other. Instead of hauling 20 tonnes of sludge-laden water, about one tonne of sludge is transported in solid form.

0 gCentrifugal force at bowl wall

0 L/DLength-to-diameter ratio

0 → 1t water → t sludge

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≈1,400 gCentrifugal forceL/D ≈ 4.2L/D ratio58–74 mmAdjustable pond depth

HOW IT WORKS

How it works SolidLiq

In a settling tank, particles settle by gravity alone; inside SolidLiq the bowl rotates at high speed, multiplying the settling force more than a thousandfold, so what takes hours is separated in seconds.

The unit uses bolted components instead of a welded frame: the bowl, cone and shafts are forged or cast parts, achieving rotational accuracy of 0.02–0.05 mm, and any part can be replaced on site without cutting or welding.

Inside the unit — the rotating bowl on display

Feed

Polymer-conditioned sludge enters through a stationary pipe along the axis into the feed chamber inside the conveyor, then into the bowl through 4 ports.

Settling

Solids are driven to the bowl wall by centrifugal force, while the water remains as an inner layer (the pond).

Conveying

The screw conveyor rotates at a slight differential speed relative to the bowl, pushing the sludge toward the cone.

Beach dewatering

On the 12° cone, the sludge rises above the water surface and is squeezed of water, then discharged through 5 ports.

Water discharge

Clarified water overflows the weir plates, exits through 8 windows and returns to the plant.

ADVANTAGES

Key advantages

High centrifugal force

Separates in seconds what takes hours by gravity.

Bolted design

Forged and cast parts with no welds; the conveyor is the only welded part, and is stress-relieved.

Precision and balance

Rotational accuracy 0.02–0.05 mm, with dynamic balancing ISO 21940 G6.3.

Adjustable pond

Stainless steel weir plates 316L Balance between water clarity and cake dryness.

Wear protection

Tungsten carbide tiles, with stainless and duplex materials for corrosive environments.

Enclosed and continuous 24/7

Odor-free, small footprint, with local manufacturing, spare parts and maintenance.

TECHNICAL DATA

Technical specifications

Bowl inner diameter	Ø532 mm
Effective length	≈ 2.25 m (cylindrical 1.69 + conical 0.56)
Ratio L/D	≈ 4.2
Cone angle	12°
Pond depth	58–74 mm (weir radius 192–208 mm)
Pond volume	≈ 175 L
Screw conveyor	Pitch 250 mm — 9 turns — clearance 1.5 mm
Centrifugal force	≈ 1,400 g at ~2,200 rpm
Sludge ports / water windows	5 × Ø40 mm / 8
Drive	3 Belts SPC + Planetary/cycloidal gearbox
Balancing	ISO 21940-11 G6.3
Model exhibited at AquaEnergy Expo	≈ 3000 rpm — 0.5 m³/h

Preliminary design values (DEC-094 Rev. B). Actual capacity is determined after testing a sample of the client's sludge.

COMPARISON

Comparison with conventional systems

Criterion	Belt press	SolidLiq
Footprint required	Medium	Very small
Odors and aerosols	Partially open	Enclosed system
Operating mode	Continuous, supervised	Continuous, automatic 24/7
Wash water	Continuous belt washing	Usually not required
Oily and difficult sludge	Limited	Excellent

APPLICATIONS

Applications

Municipal wastewater plantsIndustrial wastewaterFood industryPetroleum and oily sludgeDrinking water plant sludgePaper, textiles and tanneriesAgricultural waste