Topics:• WERF Study Revisited

• Grease Separator Retention Losses

• A New FOG Test Method Evaluated

Conclusions:Detergent Flows Remove Retained Grease from Separators

Spectrophotometer Method = EPA 1664Accuracy

Why Does This Happen?

WERF Study 2008

Dr. Joel DucosteTarik AzizN. C. State University

MetallicSoaps

InsolublePrecipitates

FattyAcids

Ca

Na

Mg

Si

P

S

Fe

Al

ActivityLipids(fats & v. oils)

Detergents

Hydrolysis

FattyAcids

Fast Assessment FOG Test

Accuracy Assessment

Emulsion Retention Loss Test

Effluent Sampling Methodology

0

200

400

600

800

1000

1200

0 1 2 3 4 5 6 7

Loss

mg/l

Drop #

Separator Design vs Emulsion Losses

Design A

Design B

Design C

Fat Flows

Soap Flows

Conclusions:Detergent Flows Remove Retained Grease from Separators Via Emulsification

Spectrophotometer Method Accuracy =/> EPA 1664 Gravimetric Method

For Report Info and Links:info@thermaco.com800-633-4204www.thermaco.com