Project Description

The Problem

A mixed breed abattoir in Northern Ireland was facing increasing trade effluent costs and constraints by the local water company. Working with our local distributor we offered to design and build a centrifuge treatment system that would ensure reduced trade effluent costs for the foreseeable future.

The Willacy Solution

The traditional method of abattoir effluent treatment is to use a two stage process of clarification, using either a DAF system or settlement stage, prior to a dewatering stage. This method results in clarified water but also a liquid sludge that can be costly and problematic to dispose of.

Our solution was to provide a single centrifuge system. This not only clarified the water to the same degree as a DAF but formed the solids into a dry, friable cake. This could then be removed from site in a farm trailer. By using this method the weight of sludge removed from site was reduced by 80%.

Effluent Treatment Centrifuge System

Above: The centrifuge system installed on site.

Effluent Treatment Centrifuge System

Above: The centrifuge system installed on site.

The System

The picture above shows the centrifuge system installed on site. The solid cake falls from the protruding screw conveyor into the skip underneath. The containers house the centrifuge on the higher level and all the controls and dosing system underneath. The system is capable of treating up to 13 m3/hour of effluent

The entire system was designed and built at our Deeside factory. It was commissioned before delivery and once it had been connected to site services, it was up and running within two days.

The treatment resulted in COD levels reduced to an average of 1,000 mg/litre and suspended solids to 400 PPM.