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Toxics Use Reduction Institute · Surface Solutions Laboratory
Toxics Use Reduction Institute

Surface Solutions Laboratory

Trial Report

Trial Number 4

(Client Number 318, Project Number 1)

Trial Purpose: To evaluate supplied product for fryer grease cleaning.

Date Run: 08/03/09

Experiment Procedure:
Preweighed stainless steel coupons were coated with a mixture of used cooking oil and grease as prepared from the UML food services. Oil was taken from the fryer operation and applied to the stainless steel coupons using a hand held swab. Coupons sat over night to allow the oil/grease to cool/harden onto the surfaces (if possible). After sitting, a second weighing was performed to determine the amount of oil/grease that was added to each coupon. Three coupons were immersed into cleaning solutions at room temperature and cleaned for 5 minutes. At the end of the cleaning, coupons were rinsed, dried and weighed a final time. Efficiency was calculated for each coupon cleaned.

One product could only be used to clean the oil/grease coated coupons by using spray applications. This was due to the cleaning product being active for 30-40 seconds. The surface of the coupons cleaned with this product was sprayed at 30 second intervals during the 5 minutes of cleaning. Several spray deliveries were attempted to determine the optimum performance. The product was compared directly to water in each delivery option to rule out the cleaning performed via the spray cleaning action.

In addition to the gravimetric analysis, visual observations were made.

Trial Results
The Sysco product removed nearly all of the grease within five minutes of immersion cleaning. Both the water and ActiveIon had limited removal of
grease via immersion/spray combinations. The Non Caustic Fryer Cleaner removed just under 80% of the grease. The table below lists the amount of soil
added, the amount remaining, the removal efficiency and observations made.

Cleaner Initial wt   Final wt     % Removed  Observations
Non Caustic Fryer Cleaner                        
        0.2015        0.0451        77.62    slight film on coupon
        0.1653        0.0453        72.60    slight film on coupon
        0.2638        0.0416        84.23    slight film on coupon
Fryer & Grill Cleaner                        
        0.3099        0.0152        95.10    minor water droplet
        0.4896        0.0065        98.67
        0.3856        0.0067        98.26
        0.3406        0.0807        76.31    residue below the surface
        0.1714        0.1153        32.73    residue below the surface
        0.1421        0.0897        36.88    residue below the surface
        0.2472        0.1772        28.32
        0.2159        0.0644        70.17
        0.2267        0.2013        11.20
        0.1280        0.0559        56.33    residue below surface-droplets
        0.2086        0.1066        48.90    residue below surface-droplets
        0.4335        0.1322        69.50    residue below surface-droplets

Success Rating
A follow up test, usually based on company input.

The supplied product removed under 85% of the grease following the basic testing procedure at room temperature. The traditional product removed more then 95% under the same conditions. A follow up test at an elevated temperature or increased concentration may improve the supplied cleaner's performance.