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Materials

The materials required for this science fair project:

-    300ml of FOG (fat, oil and grease) from a grease trap
-    A measuring cylinder
-    600ml of distilled water
-    50ml of liquid enzyme, your should acquire at least 3 different brands
-    50mg of powder enzyme, your should acquire at least 3 different brands
-    50mg of solid enzyme, your should acquire at least 3 different brands
-    An assistant
-    A plastic bag
-    A pair of PVC gloves
-    A black marker pen

Procedure

1.    For this science fair project, the independent variable is the form of enzyme used to dissolve and breakdown the FOG waste, - namely, liquid, powder and solid enzymes. The dependent variable is the number of days taken for the FOG waste to breakdown. This is determined by observing the beaker everyday. The constants (control variables) are the amount of enzyme, water and FOG waste used.

2.    A visit to a nearby restaurant is made and permission obtained from the owner to open their grease trap to obtain some FOG waste samples. With the help of the assistant, the cover of the grease trap is opened. Wearing the PVC gloves, collect about 300ml of greasy waste from the trap. The waste from the grease trap is brought back to the lab for testing.

3.    9 beakers are labeled “liquid”,” powder” and “solid”. Distinguish between all the "liquid"beakers by labelling them 1 to 3. Do the same for powder and solid enzymes. Each of the 9 beakers are filled with 200ml of distilled water. Place 50ml of each of the three types of liquid enzyme, 50mg of each of the three types of powdered enzyme and 50mg of each of the three types of solid enzyme into the beakers according to the labels. 100ml of the greasy waste from the grease trap is extracted and poured into the beakers.

4.    The beakers are observed everyday to see if the enzymes have completely broken down the greasy waste. The observations made are recorded in the table below.
 

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Complexity level:
6
Project cost ($):
40
Time required:
1 day to prepare, 10 days for observation
Material availability:
Enzymes may be purchased at a DIY store or some of the larger supermarkets.
Safety concerns:

Basic safety requirements