Digestate Recirculation Rotary Lobe Pumps
Review rotary lobe pumps for digestate recirculation and transfer, with attention to the material fraction, gas or foam exposure, suction conditions, fibers, and abrasive sediment.
Request Pump SizingDefine the Digestate Stream & Pumping Duty
Identify whether the pump handles whole digestate, a separated liquid fraction, or a thicker settled stream. These materials can differ in solids, fibers, gas content, and flow behavior; one total-solids value does not fully describe the duty.
- Recirculation
- Return flow within the process. Provide the required flow, operating hours, source and return points, and loop pressure losses.
- Transfer
- Movement between process stages or storage. Provide source and destination levels, batch volume or flow, transfer time, and any change in material after separation or settling.
Gas Exposure, Priming & Suction Conditions
Describe gas, foam, and possible suction-side air entry separately. Review tank levels, pump elevation, pipe high points, valves, and the startup sequence when liquid supply is unstable; a pump type alone does not establish acceptable gas handling or suction lift.
Confirm priming conditions, seal support, and low-level or loss-of-flow controls for the selected configuration. Any empty-pipe exposure needs review of duration and speed rather than an assumption of unrestricted dry running.
| Review Point | Why It Matters | Data Needed |
|---|---|---|
| Flow and pressure | Recirculation and batch transfer may impose different operating points | Flow range, discharge pressure, pipe sizes and lengths, elevation, operating cycle |
| Inlet conditions | Changing levels and gas exposure affect liquid supply | Source level range, pump elevation, suction layout, gas or foam observations |
| Startup and protection | The drive and controls must suit restarts and interrupted supply | Shutdown duration, settled material, valve sequence, pressure protection, seal support |
Sand, Settled Sediment & Wear Components
Feedstock and manure can introduce sand and mineral grit. Describe particle size and concentration, including whether the concentration is measured by mass or volume. Note sediment accumulation near the intake and changes after mixing or a shutdown.
Review rotor coverings, liners, wear plates, and seals against abrasion, digestate chemistry, temperature, and operating speed. Confirm the proposed model’s replaceable parts and inspect actual wear before setting service intervals; a fixed material package does not establish service life.
Fibrous Residues & Maintenance Access
Provide the length and type of straw, hair, crop residues, and any foreign material. Review the selected pump’s passage geometry and upstream screening or maceration where needed; fiber length and shape matter as well as particle diameter.
Confirm how the selected pump is opened for inspection, which components can be removed without disturbing the pipework, and the clearance needed for removal and lifting. Include isolation and cleaning access in the installation layout rather than assuming a standard clearout time.
Data for Digestate Pump Sizing
- Material: digestate fraction, total solids (% by mass), temperature, flow behavior, chemistry, fiber length, grit loading, and gas or foam exposure.
- Duty: flow and pressure with units, recirculation hours or batch volume and transfer time, shutdown duration, and any current wear or blockage history.
- Installation: source and destination levels, pump elevation, pipe layout, available drive and controls, maintenance space, and site electrical requirements.
Request Digestate Transfer Pump Sizing
Share your digestate characteristics, recirculation or transfer duty, and system layout through our contact form for an application review.
Request Pump Sizing