Sludge in.
Cake out.
One low-speed screw, a fixed and free ring system, and a cake you can shovel. Clog-free, self-cleaning, fully automatic.
Request a quote →- 9–600 kg-DS/h across twelve models
- Cake at 20% dry solids minimum
- 2,000 to 50,000 mg/L inlet sludge
- 0.74 to 5.15 kW installed
- Rinse water in litres per hour, not m³
- Unattended start, run and washdown
Engineered
for continuous operation.
- Clog-free filtration
- Free rings clean the filtering gaps on every turn. No clogging, no capacity fade between cleanings.
- Self-cleaning
- Rinsing water measured in litres per hour: 32 L/h on a BTECH-201. No backwash pump.
- Low-speed operation
- From 0.74 kW. Low vibration and noise, reduced dynamic loads.
- Fully automatic
- Start-up, operation and wash-down run unattended, around the clock.
A closer look
at the BTECH®.
Eight photos from the factory floor, from single to triple drive. Drag or keep scrolling.
Progressive dewatering
inside one drum.
The dewatering drum is built from interlaminated fixed rings and free rings, held by rods with spacers in between. A screw turns slowly through the stack.
Sludge is thickened and then dewatered progressively along the screw axis. Filtrate escapes through the filtering gaps between the rings. The screw pitch narrows towards the discharge outlet: pressure builds where the sludge is already thick, and the cake is discharged.
- AFixed ringsForm the filtering gaps and carry the load.
- BFree ringsRide with the screw and keep the filtering gaps open, so the press cleans itself.
- CScrewLow speed, narrowing pitch. Transport plus compression.
- DEnd plateBack pressure point. Sets cake dryness.
Six reasons
it stays running.
- 01Wide concentration rangeFrom 2,000 to 50,000 mg/L — mixed liquor to primary sludges — through a single inlet, on the same machine.
- 02Clog-free, no thickenerFree rings clean the filtering gaps between the fixed rings on every turn, so nothing clogs. Thickening happens in the first section: no upstream thickener needed.
- 03Low speed, low powerScrew pitch and filtering gaps narrow toward the outlet, building pressure gradually at 2 to 4 rpm. Minimal vibration, low noise.
- 04Self-cleaningFiltrate leaves through the ring gaps while they clean themselves. Rinsing water in litres per hour: 32 L/h on a BTECH-201.
- 05Replaces existing systemsCake at 20% dry solids or better. Drops in for a belt press, decanter centrifuge or filter press.
- 06Fully automatic controlPressure builds against the end plate and the cake leaves on its own. Unattended start, run and washdown.
Hover a point to see which part does the work.
How it works.
From the thickener
to the skip.
- 01FeedSludge arrives from the thickener.
- 02Flocculation tankConditioning with polymer.
- 03Dewatering drumScrew driven by an inverter.
- 04Cake and filtrateCake to the skip, filtrate back to the plant headworks.
Specific energy consumption.
Of the energy a belt press needs for the same sludge.
Of the energy a decanter centrifuge needs.
Where the press
is working.
- 01Municipal wastewater
- 02Food processing
- 03Beverages & wineries
- 04Dairy
- 05Biogas digestate
- 06Composting
- 07Petrochemical & oily sludge
- 08Chemical
- 09Pharmaceutical
- 10Slaughtering & breeding
- 11Printing & dyeing
- 12Paper & pulp
- 13Leather
- 14Metal working
It replaces a belt press, decanter centrifuge or filter press in any of them.
Some of
our references.
- −90%Energy useUrban WWTP, replacing a centrifuge
- −55%Polymer consumptionUrban WWTP, replacing a belt press
- +500%Dewatering capacityIndustrial WWTP, replacing a centrifuge
- −90%Sludge disposal costTwo winery WWTPs
01 Acquedotto PuglieseSerracapriola (FG) Municipal wastewater BTECH-352 −90% energy
- Sector
- Municipal wastewater
- Model
- BTECH-352
- Sludge
- Biological
- Brief
- Replace the existing centrifuge
- Results
- Energy use down 90%
- Polymer use down 50%
- Easier day-to-day running of the dewatering plant
02
Ondapack SudAcquaviva delle Fonti (BA)
Industrial wastewater
BTECH-201
−80% energy
- Sector
- Industrial wastewater
- Model
- BTECH-201
- Sludge
- Chemical-physical
- Brief
- Replace the existing centrifuge
- Results
- Energy use down 80%
- Polymer use down 50%
- Easier day-to-day running of the dewatering plant
03
KikauMassafra (TA)
Industrial wastewater
BTECH-201 skid
Automatic dewatering
- Sector
- Industrial wastewater
- Model
- BTECH-201, skid-mounted
- Sludge
- Chemical-physical
- Brief
- Replace the drainage bags
- Results
- Sludge dewatering now runs automatically
- Easier day-to-day running of the dewatering plant
04 Gestore Servizio IdricoSangineto Lido (CS) Municipal wastewater BTECH-301 skid −85% energy
- Sector
- Municipal wastewater
- Model
- BTECH-301, skid-mounted
- Sludge
- Biological
- Brief
- Replace the existing belt press
- Results
- Energy use down 85%
- Polymer use down 55%
- Easier day-to-day running of the dewatering plant
05
Cantine 2 PalmeCellino San Marco (BR)
Winery
BTECH-301 skid
−90% disposal cost
- Sector
- Winery
- Model
- BTECH-301, skid-mounted
- Sludge
- Biological
- Brief
- A new sludge dewatering line
- Results
- Sludge disposal cost down 90%
- Easier day-to-day running of the dewatering plant
06 ProgevaLaterza (TA) Composting BTECH-351 +500% capacity
- Sector
- Composting
- Model
- BTECH-351
- Sludge
- Chemical-physical and biological
- Brief
- Replace the existing centrifuge
- Results
- Dewatering capacity up 500%
- Energy use down 70%
- Polymer use down 30%
- Easier day-to-day running of the dewatering plant
07 Acquedotto PuglieseBisceglie (BT) Municipal wastewater BTECH thickener −80% sludge volume
- Sector
- Municipal wastewater
- Model
- BTECH thickener
- Sludge
- Biological
- Brief
- New dynamic thickening of the surplus sludge
- Results
- Surplus sludge sent to anaerobic digestion cut to a fifth of its volume
- Longer retention in the digester: more biogas and a better-stabilised sludge
08
Cantine PaololeoSan Donaci (BR)
Winery
BTECH-301
−90% disposal cost
- Sector
- Winery
- Model
- BTECH-301
- Sludge
- Chemical-physical
- Brief
- A new sludge dewatering line
- Results
- Sludge disposal cost down 90%
- Easier day-to-day running of the treatment plant
09
Sebigas Renewable EnergyCorigliano Calabro (CS)
Biomethane from organic waste
2 × BTECH-403
−70% solids in filtrate
- Sector
- Biomethane from organic waste
- Model
- 2 × BTECH-403
- Sludge
- Digestate
- Brief
- New solid-liquid separation of the digestate
- Results
- Suspended solids in the filtrate down 70%
- Less maintenance on the separation stage
Results measured on site.
Wear you can
see coming.
Tungsten-carbide screw
The screw flight is carbide-coated, and the rings ride on its crest instead of scraping it. No metal-on-metal wear to replace.
One-button opening
The cylinder opens on a single lever. You can watch the thickening and dewatering zones while the machine runs, and adjust from what you see.
Reference ring
A marked ring sits in each zone. Compare it against the rest to schedule an overhaul, instead of waiting for the filtering gap to drift out of tolerance.
Pre-thickening module
An optional thickening stage inside the flocculation tank. On sludge below 1% dry solids it lifts throughput by more than half.
Optional module. Say so at sizing, because it changes the model you need.
Twelve models.
Let’s choose together.
Click a column header to sort, again to reverse.
| Model | Capacity kg-DS/h* | L × W × H mm | Discharge mm | Net kg | Running kg | kW | Rinse L/h |
|---|---|---|---|---|---|---|---|
| BTECH-201 | 9–15 | 2555 × 920 × 1465 | 350 | 320 | 470 | 0.74 | 32 |
| BTECH-202 | 18–30 | 2615 × 960 × 1465 | 350 | 470 | 730 | 1.11 | 64 |
| BTECH-301 | 30–50 | 3325 × 870 × 1760 | 495 | 910 | 1320 | 1.5 | 40 |
| BTECH-302 | 60–100 | 3455 × 1135 × 1760 | 495 | 1350 | 2130 | 2.25 | 80 |
| BTECH-303 | 90–150 | 3670 × 1560 × 1760 | 495 | 1820 | 2880 | 3 | 120 |
| BTECH-351 | 60–100 | 3475 × 905 × 1820 | 585 | 1610 | 2210 | 1.1 | 72 |
| BTECH-352 | 120–200 | 3570 × 1285 × 1820 | 585 | 2300 | 3400 | 2.75 | 144 |
| BTECH-353 | 180–300 | 3645 × 1725 × 1820 | 585 | 3350 | 4850 | 3.85 | 216 |
| BTECH-401 | 90–150 | 3905 × 1070 × 2210 | 759 | 2500 | 3400 | 1.85 | 80 |
| BTECH-402 | 180–300 | 4240 × 1570 × 2210 | 759 | 3480 | 5200 | 2.95 | 160 |
| BTECH-403 | 270–450 | 4465 × 2060 × 2210 | 759 | 4550 | 7050 | 4.05 | 240 |
| BTECH-404 | 360–600 | 4670 × 2630 × 2210 | 759 | 6550 | 9660 | 5.15 | 320 |
(*) Capacity data for reference only. Contact our Technical Department for further information on Model Selection and configuration.
What model fits your needs?
Let’s choose the right one together.