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Dale Farm Dairy Effluent

Client:Dale Farm

Background

Dale Farm is Northern Ireland’s leading dairy company and produce a range of products including milk, cream, cheese, yogurt and spreads, available worldwide.

They required improved protection for the on site biological effluent treatment plant due to the existing fat trap being inefficient.

The Overall Objective

The client was experiencing operational difficulties with the site’s activated sludge plant due to excessive fat content in the incoming effluent. This causes problems for two reasons – it places additional loading on to the treatment process, and it affects the characteristics of the activated sludge, which can make separation in the settlement tanks less efficient and therefore puts discharge compliance at risk.

Solution

SPS conducted a site visit to assess requirements – a DAF unit with chemical pre-treatment was identified as the most appropriate solution. Siltbuster’s D100 packaged lamella DAF unit was deployed on hire initially, and positioned after the balance tank.

The efficient removal of fat oil and grease along with associated COD had a dramatic and beneficial effect on the operation of the effluent plant, safeguarding compliance. The benefit to the process meant that Dale Farm decided to purchase the DAF unit as a permanent treatment stage.

 

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