The Huber Screw Press Q-Press is an efficient sludge dewatering solution that eliminates the need for prior thickening, achieving 18-25% dry solids and over 97% volume reduction with minimal operator attention. It features low power consumption, a low rotation speed for reduced wear, and integrated cleaning systems to optimize performance. A.T.E. Huber Envirotech, leveraging 180 years of experience, provides advanced wastewater treatment solutions across various industries.

1. HUBER screw press Q-PRESS:
An effective and efficient solution for sludge dewatering
A.T.E. HUBER Envirotech Private Limited
www.atehuber.com
v4.0 Dec 2020

2. HUBER screw press Q-PRESS – benefits
▪ Sludge dewatering without the need for prior
thickening
▪ Dewatering results in 18 - 25% DS (dry solids)
▪ Sludge volume reduction > 97% in a single step
▪ Little operator attention (< 20 min/day)
▪ Specific power consumption < 8 kWh/tDR (tons of
dry residue)
▪ Virtually no wear because of < 1.5 rpm screw
rotation speed
▪ Noise level < 70 dB(A) and no vibrations
▪ Project IRR = 15.98 % and NPV = 166,158 (for 5
years period)

3. Sludge feed
Spray basket
Wash water
Filtrate
discharge
Filter basket
Auger drive
Spray drive
Auger
Sludge cake discharge
Pneumatic pressure cone
HUBER screw press Q-PRESS

4. ▪ Flocculated sludge is pumped into a cylindrical screen
basket wherein an auger slowly rotates
▪ The diameter of the auger’s shaft increases towards the
end of the basket and the gap between its flights
decreases
▪ The volume between basket, shaft and flights continuously
decreases, thus the pressure on sludge increases, as the
sludge is moved through the basket
▪ Sludge water is pressed through the basket’s screen
▪ The auger pushes the increasingly thicker sludge towards
the annular clearance, defined by a circular opening and
an adjustable discharge cone therein
▪ The cone is pressed against the opening by pneumatic
cylinders, thus maintaining a defined sludge pressure at
the discharge end
▪ Scrapers on the screw shaft continuously clean the filter
basket from the inside
▪ A spray bar backwashes it periodically and segment by
segment from the outside without interrupting the
dewatering process
HUBER screw press Q-PRESS – how it works

5. HUBER screw press Q-PRESS – models and throughput

6. ▪ Conical auger shaft
▪ 3 wedge wire sections with different bar spacings
▪ Continuous wedge wire inside cleaning by wiper
mounted on auger flights
▪ Pressurized feed (0 – 500 mbar)
▪ Pressure monitoring/control
▪ Reinforced cylindrical wedge wire
▪ Adjustable pneumatically actuated pressure cone
▪ High torque auger drive which exceeds latest energy
efficiency standards
▪ IE 4 efficiency standards
▪ Maximum motor power delivery
▪ Wider throughput rates
▪ Low auger rotations 0.3 – 1.5 rpm
▪ Intermediate wedge wire cleaning (outside) by fixed
spray bar
▪ Wedge wire section that revolves
▪ Oversized exterior auger bearing
▪ Bearing life >10,000,000 hours
HUBER screw press Q-PRESS – features

7. Split housing
Enables dismounting of the screw shaft with reduced
space requirements
HUBER screw press Q-PRESS – features
▪ Allows maintenance with screw in place
▪ Reduced maintenance, space and time
requirements
Split filter baskets (optional)

8. Rotating spray nozzle basket for screen basket washing
▪ Separate washing of the pre-dewatering zone and press
zone during the dewatering process
▪ Adjustable spraying frequency and duration
▪ Integrated cleaning of the housing
▪ Minimized water entry into press zone
▪ Reduced wash water demand
▪ Improved dewatering results
HUBER screw press Q-PRESS – features and benefits
Access
▪ Large and easy-to-operate inspection openings into
the screen basket and sludge discharge chamber
▪ Stable openings into the filtrate chamber for
maintenance
Inspection opening into the screen basket
▪ for easy inspection of the filter inside
▪ quick removal of disturbing coarse material

9. HUBER screw press Q-PRESS vs centrifuge (10 MLD plant)
Parameter
Gravity thickener +
Centrifuge
HUBER Q-PRESS
Wastewater Flow (MLD) 10 10
Volume of sludge generated (wet basis m3/d) 119 119
Volume of gravity thickener (m3) 19.05 Thickener not required
Area required (thickener + centrifuge) (m2) 30 9 (only screw press)
Thickener outlet sludge consistency (%) 2 -
Connected load - thickener(kW) 1 -
Poly dose (kg/d) at 1% inlet consistency 2.4 NA
Dewatering machine model AL 20 RoS 3Q 440.2
Capacity (m3/day) 59.5 119
Connected load - dewatering machine (kW) 11 1.5
Connected load - compressor (kW) NA 1.1
Connected load - wash water pump (kW) NA 4
Poly dose (kg/d) for dewatering machine 2.4 2

10. HUBER screw press Q-PRESS vs centrifuge (10 MLD plant)
Dewatering machine model
Centrifuge - AL 20 Q-PRESS 440.2
Power cost @ ₹8/kWh - thickener (₹/year) 68,371 0
Power cost @ ₹8/kWh - dewatering
machine (₹/year)
6,85,227 1,02,556
Power cost @ ₹8/kwh - compressor
(₹/year)
NA 25,208
Power cost @ ₹8/kwh - wash water pump
(₹/year)
5,698 5,698
Poly cost per year @ ₹275/kg 2,40,900 2,00,750
Total operating cost (₹/year) 10,00,196 3,34,212
Total annual saving ₹ 6,65,984

11. A.T.E. HUBER Envirotech Private Limited (AHET) is a joint venture between A.T.E., India, and HUBER
SE, Germany
Huber is backed with 180 years of experience and with more than 40,000 installations in 60 countries
AHET has delivered more than 300 projects in 10 countries over the last 19 years
AHET has expertise in handling wastewaters from the chemical, petrochemical, pharmaceutical, textile,
dairy, sugar, distillery and municipal sectors
AHET offers proven products and technologies for industrial and municipal wastewater treatment,
recycling and zero liquid discharge and sludge management
A.T.E. is a diversified engineering group with over 80 years of experience in different verticals
Huber SE is a global leader in wastewater treatment and sludge management solutions
About A.T.E. HUBER Envirotech Private Limited

12. Industries served
▪ Textile ▪ Paper and pulp
▪ Dairy ▪ Power
▪ Sugar ▪ Petrochemical
▪ Chemical ▪ Food
▪ Pharma ▪ Municipal
Our offerings
▪ Industrial wastewater treatment plants ▪ Headworks for municipal wastewater plants
▪ Anaerobic and aerobic biological
treatment plants
▪ Wide range of screens (coarse to ultrafine screens)
▪ Membrane bio-reactors ▪ Dissolved air floatation systems
▪ SUFRO, reverse osmosis plants for
water recycling
▪ Comprehensive sludge management systems
including sludge dryers
▪ ZLD including MEE and ATFD ▪ Sludge to energy projects
AHET offerings and industries served

13. THANK YOU