Raw wastewater at Greggs, UK

Problem: 

Greggs is a confectionery chain with shops almost every city
in UK. This factory was built in 2011 and with the original
planned production volume, this factory did not need any
wastewater treatment, and was just discharging it to
sewage. However, they expanded the production and thus
the wastewater now had to meet the discharge consent,
but they did not want to over-invest because the discharge
consent was not so strict

Solution:

They first considered DAF treatment, but it was too
expensive. Alternatively, Volute ES-101 was finally installed
for 50% of DAF’s initial cost. Not only that the initial cost is
lower, the maintenance of Volute is almost zero while DAF
should have required 2 hours a day. Also, while the sludge
from DAF would have been still wet, sludge coming out of
Volute is already dry.

Result:

ES-101 treating 1m3/h for 12 hours/day. The produced cake is 49% DS (27% fat).

Client’s Voice

“We are more than happy to have chosen Volute as it is
cheaper, less maintenance required, and the quality of the
wastewater treatment is very high while final sludge for
disposal is minimized. All positive.”