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Optimizing Re-use of High Load Wastewater

Pineland Farms Dairy
Bangor, Maine


Optimizing Re-use of High Load WastewaterProject Background

Pineland Farms was building a new cheese processing plant in Maine and needed to ensure that the cheese whey and wash water effluent being discharged met the municipality BOD discharge limit of 350 mg/L. They were interested in evaluating a small footprint treatment solution that could meet the discharge limit, and could also increase water re-use in the future.

Equipment Selection

To meet both the discharge limit as well as maximize water recovery, Cerahelix worked with technology partner, Howell Laboratories to combine our picofiltration technology with their electrocoagulation (EC) equipment. Together we installed a pilot unit composed of an EC equipped with aluminum electrodes and a cross flow filtration system containing our ceramic PicoHelix membranes.

The process synergy is that the ceramic PicoHelix membranes resist fouling from the EC effluent, while the recycled membrane retentate increases both the EC and overall process efficiency.

overall process efficiency

System Parameters
Cerahelix filterPicoHelix
Wastewater flow15,000 GPD
Influent C3000OD range8000—20000 ppm
pH3.5—9
Hydraulic Recovery93%
ParameterInlet
(mg/ L)
Permeate
(mg/L)
TSS2,4000
BOD3,400203
COD11,400675
Hardness1641
NO3-N1.710.42
TKN15113.3
PO4841.2