Articles & Case Studies

Hidrostal provides pumps for Devon based Dairy Farm’s Digestion Plant

Posted: Monday 19th August 2019

Hidrostal Ltd, the UK distributor for the renowned Swiss pump manufacturer, has provided a Dairy Farm in Devon with pumps for their onsite Anaerobic Digestion (AD) plant.

Langage Farm, situated just outside Plymouth City, has been a working farmstead for over 900 years. Bought by the Harvey family in 1952, the farm was extended into a creamery in 1980 and then developed to incorporate the AD plant in 2011. Langage is thought to be the first dairy company in the UK to have a farm, manufacturing unit and anaerobic digester all on one site, allowing the processes to work in a full Closed Loop cycle. Langage AD produces digestate to fertilise the soil, improving grazing quality in the pastures, leading to increased milk yield for the dairy. The dairy waste then fuels the AD plant.

Hidrostal supplied eleven pumps in total to Langage AD back in 2011. Three hard iron 9 kW immersible pumps for digester grit and waste removal are installed in two below ground dry wells located between each digester. Three ATEX rated hard iron pumps are positioned within the top of the digester for skimming, and two smaller pumps are used to pass the waste digestate. These pumps have been operating continuously for the past 8 years with only routine maintenance required.

Hidrostal pumps were specified by the system designer due to their renowned and proven capability of pumping grit laden sludges. The pumps low NPSH requirements are ideally suited to the digester skimming application due to the unique impeller geometry of the Hidrostal screw centrifugal impeller. Extremely versatile in its application, the impeller provides efficient handling of a range of liquids, often highly abrasive or corrosive in nature. It is ideal for Solids Handling, Pumping Viscous Sludges and Handling Delicate or Low Shear Products. Unique to all Hidrostal pumps is the ability to handle each of these in combination.

Gary Jones, Technical Director of Langage AD, enthused:The unique nature of the Hidrostal Screw Centrifugal Pumps has served the demanding applications of the Langage Farm AD plant well since 2011. With a bit of routine maintenance these pumps have proven to be very reliable working in a tough environment.”

Hidrostal Ltd are delighted that their pumps continue to function so well for Langage and have helped them to achieve their status of becoming the first dairy in the country to be carbon neutral. Normal 0 false false false false EN-GB X-NONE X-NONE

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