Hydro Screw Press

Hydro Screw Press

Glanua’s Screw Press range of sludge dewatering systems are some of the most efficient in the world, delivering energy savings of up to 80% against other dewatering technologies such as centrifuge and belt presses. Glanua design to site specific conditions and provide support in equipment selection, installation, commissioning and optimisation.

The Hydro Screw Press System consists of flocculation tank upstream of the screw press dewatering unit. Fabricated from high grade stainless steel 304 (316 available on request) this upward flow mechanical flocculation tank provides contact time for development of a liquid-solid separation and a strong floc formation. As part of package systems, Glanua also offer Polymer Preparation and batching systems which complete automated batching and dosing of dilute Polymer to the Screw Press flocculation tank.

From the flocculation tank, the flocculated sludge gravitates to the screw press dewatering unit. Depending on the site requirements and model this can be a single or double screw arrangement. The screw press is mounted on a pitch to promote free draining of supernatant from the dewatering rings to the dewatering collection trough below. Hydro’s innovative self-cleaning mechanism consists of a set of oscillating rings attached to the screw press main drive motor, which provide continuous self-cleaning of the system.


Benefits of the Hydro Screw Press

Low Maintenance & Longevity

Hydro Screw Presses are designed with low maintenance and low operator intervention in mind. The units are constructed from high grade stainless steel 304 (316 available on request) and operate at slow speeds via gear reduction motors. The built-in self- cleaning mechanism and simple liquid/solid separation technology means that operator supervision and intervention are greatly reduced.

Low Wash Water Usage

Glanua’s innovative self- cleaning oscillating plate technology means that continuous automated wash water cleaning is not required. Although period machine washdowns are recommended, wash water usage of the Hydro Screw Press is significantly less than other dewatering technologies on the market.

Energy Efficiency

Compared to alternative dewatering technologies on the market, the Screw Press offers superior dewatering efficiency in terms of energy usage, making it one of the most sustainable dewatering solutions on the market.

Low Odour Generation

The Hydro Screw Press is an enclosed unit with surrounding hoods and access points. This reduces the odours
emitted from the unit. Odour extraction connection point(s) can also be fitted to the units on request.

Ease of Operation

The simple mechanical principles of the Hydro Screw Press mean that the system is largely autonomous. The system is designed to operate 24 hours per day in a non-supervised capacity, meaning that capital investment on infrastructure can be reduced along with availing of cheaper off-peak energy rates.

Low Noise & Vibration Emissions

The Hydro Screw Press utilises speed reduction gearbox units to generate the mechanical dewatering forces within the Screw Press. For this reason, the system operates at a greatly reduced noise emission value of 55 dBA @ 1m and low levels of vibration.

Skid Mounted & Modular

The CE marked Hydro screw press is fabricated off-site in a dedicated quality- controlled environment. The units are modular and are skid mounted allowing for easy transport, fast installation on-site and ease in expandability.

Polymer Usage

Polymer usage is consistent with other typical dewatering technologies ensuring an acceptable level of flocculation to achieve adequate solid/liquid separation.

Operating Efficiencies in Comparison to Alternative Dewatering Technologies


Typical Installations

The Hydro Screw Press can be offered in a range of installation configurations depending on site requirements and client preferences. We will offer a consultation service to find a solution which best fits your needs. Glanua also provide turnkey solutions in the design and installation of dewatering system integration.

Typical installation arrangements include:

  • High level platform discharging into a skip or trailer.
  • Ground level solution discharging into a cake auger or cake pump.
  • Containerised solution for semi-permanent mobile installations.
  • Trailer mounted solutions for mobile dewatering systems.

Advantages & Benefits

  • Typical dewatering results of 20% DS
  • Solids recovery of up to 95%
  • Sustainable dewatering
  • Operational efficiencies
  • Reduced operator requirement
  • Sludge thickening
  • Energy efficient
  • Low maintenance
  • Low odour
  • Low noise

Additional Services Available

  • Technical support Installation & setup
  • Maintenance & servicing
  • Operation
  • Optimisation
  • Polymer analysis & selection
  • Application support
  • Automation integration

Model Selection & Technical Information:

Applicable UnitsHydro Single Screw Press SP1-200Hydro Single Screw Press SP1-400Hydro Single Screw Press SP2-400
Flow Ratem3/hr1 ~ 2.52.5 ~ 55 ~ 10
Screw Press Dry Weightkg2301,0752,150
Typical Sludge Feed Concentration% D.S.1 ~ 5%1 ~ 5%1 ~ 5%
Typical Dewatering Results% D.S.20% +/- 5%20% +/- 5%20% +/- 5%
Typical Polymer ConsumptionKg A.P./T D.S.4 ~ 104 ~ 104 ~ 10
Solids Recovery Capture Rate%90% +/- 5%90% +/- 5%90% +/- 5%
Typical Daily Run TimeHrs / Day8 ~ 248 ~ 248 ~ 24
Solids Dewatering Capacitykg D.S. / Hr10 ~ 12510 ~ 12510 ~ 125
Maximum Daily Through-putkg D.S. / Day240 ~ 3,000600 ~ 6,0001,200 ~ 12,000
Main Screw(s) Rated PowerkW0.75*1=0.750.75*2=1.50.75*4=3.0
Typical Dewatering System Energy UsagekW / Hr0.38 ~ 0.750.76 ~ 1.51.52 ~ 3.0