Borger has developed a new separator to remove sand, grit and small glass specks from slurry and digestate.

The German firm’s compact and fully enclosed Flowsep assembly is designed to be retrofitted to a larger Bioselect separation system, such as its RC 150.

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This sieves liquids from solids, with the latter discharged into a heap or trailer.

However, the remaining liquor will still contain sand and other hard particles, which is where the secondary Flowsep filter comes in.

It applies a centrifugal force that the company reckons can extract up to 90% of the small solids, while maintaining throughputs of 100cu m/hour or so.

Once filtered, a pump conveys the liquid back to store or, with the extra Plus module, recirculates it for a an extra round of purification.

The control system allows the delivery rate of the rotary lobe pumps to be altered according to the speed of the Bioselect and Flowsep, with operators able to prioritise either throughput or separation efficiency.

According to Borger, the setup will significantly reduce wear of pumps, pipes and valves on agricultural and biogas installations.

And, thanks to the reduction in abrasive sediment build-up in stores, it should make field application equipment last longer too.

A Flowsep BG 50 15kW, suitable for pairing with an RC 150 separator, is priced from £30,000. The smaller 35 model (11kW) for an RC 40 or 75 is £25,000.