Effluent From Sauce Production

Site Challenge

PolyPump was approached by a leading sauce manufacturer for a sustainable wastewater treatment method, as there isn’t currently a wastewater treatment facility. The leading sauce manufacturer produces around 20–25 different recipes of condiments per week. The production volume has been increasing over the past two years, as has the trade effluent volume. A trade effluent sample was taken from the blocked soakaway at the back of the factory.

The sample had a pH of 3.73, a conductivity of 2.82 mS/cm, and a temperature of 22.1°C.

The trade effluent was light orange red in colour. It was producing gas bubbles on the surface of the trade effluent in the soakaway. In the sample bottle, there were some large but soft looking sediments at the bottom of the bottle. Upon releasing the gas build-up in the sample bottle, the sediments floated to the top, indicating the sediments had a low density.

Their waste transfer process involved countless IBCs’ plus multiple tankers a week to take away around 4,000 gallons (18,184L) of trade effluent per visit. It is estimated that 50–60 m3 per week is taken away by the tankers.

Site Solution

Client installed a DAF plant on site therefore need a progressive cavity pump to transfer from the soak away to the DAF tank. 

Dissolved Air Floatation (DAF) is usually the technology of choice in the Food and Beverage industry as the front-end solids removal technology due to the low-cost vs effectiveness of removal of pollution.

DAF is based on a physical / chemical process, where the injection of air into the water stream with chemical assistance causes the particles/flocs to float to the surface. This floating sludge layer is then automatically and continuously removed by a scraper mechanism. 

The resulting water underflow from DAF and dewatering process, would be disposed of through local water water treatment works (WWTW).