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Divide and separate

Divide and separate

T.H. White’s slurry specialist Bob Gallop explains how the system, based on Bauer pumps and equipment, works.


“Slurry in the lagoon is stirred with a 7.5kW wall-mounted Bauer MEX 305 mixer which has a 305mm diameter and 3.5-metre-long impeller.


“A Bauer CSP 5.5kW submersible pump with cutting disc then pumps it to the 5.5kW Bauer S655 separator, which has a stainless steel press screw and screen. The separator automatically splits slurry into liquid and solid fractions, using weight-regulated discharge.”


The system is controlled by ‘high and low level’ float switches, or can be set to work on a time clock from a Devizes Controls control box.


Mr Gallop says: “If operated in automatic mode from the control box, the system will start from the high float or the timer, first to run the mixer for a short time before the separator starts and finally the pump will supply the separator until either the low float or the timer stops all the motors.


“While in operation the mixer has its own timer to intermittently keep the pit mixed.”


The separator is suitable for herds of up to 200 cows, which would offer Mr Johnson scope for the expansion he is considering.

Cash in store for improvements

Cash in store for improvements

As part of the Agricultural Transition Plan, Defra will offer a new slurry investment scheme from 2022 to help reduce pollution from farming and contribute to the 25 Year Environment Plan and net zero commitments.


This is designed to help farmers prepare for more stringent enforcement of the rules around slurry management over the transition period.


This scheme will help farmers invest in new slurry stores which exceed current regulatory requirements and are proofed against higher standards expected in the future.


The scheme will also enable farmers to adopt other pollution-reducing measures, such as low emissions spreaders, which are to be a legal requirement by 2025, and the cost of storage capacity to go beyond the current legal requirements.


Funding will be given to meet a significant proportion of one-off capital cost of new stores and impermeable covers and to pay for a significant proportion of other associated equipment (pumps, pipework, access, reception tanks, etc).


Consultation on the scheme will take place in spring 2021 and details of how it will be rolled out published later in the year.


Defra expects to make funding available from autumn 2022/23. In addition, the Farming Investment Fund will include some slurry equipment from 2021.

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