Entry Form for the Annual Primary Waste Water Treatment Competition
Your team is invited to compete in the Annual Primary Waste Water Treatment Competition. You will
be given a quantity of Teacher’s Waste Water which may contain some or all of the following
elements: potting soil, plastic, leaves, raisins, oatmeal, tea, coffee and/or other organic material. The
waste water used will not contain any filthy-bacteria-laden materials. Your team will have time to
design, purchase the parts, and construct a primary waste water treatment device (PWWTD).
However, ready or not, the competition will begin at the designated time of when everyone will
receive 200 ml of the Teacher’s Waste Water.
Hint: the teams that scored highest in previous competitions constructed a prototype. They tested the
prototype with the wastewater and then built another treatment device with modifications. Keep in
mind that they had to pay for all materials.
The competition will be scored on the following criteria: design and cost of the device, clarity and
color of water, and rate of purification. See the rubric below.
INSTRUCTIONS: Design and draw your Primary Waste Water Treatment Device in the space below.
Fill out the order form and hand it to the clerk of the “store.”
ORDER FORM FOR SUPPLIES
COST PER
plastic water bottle
bag of sand
bag of gravel
coffee filter
8 cm x 8 cm square of plastic screen
8 cm x 8 cm square of cloth
8 cm x 8 cm square of newspaper
duct tape 10 cm
rubber band, each
paper clip, each
activated charcoal
$100
$10
$10
$10
$20
$20
$5
$10
$2
$2
$40
DESIGN OF PWWTD (draw your design here) (5 points)
QUANTITY
ORDERED
TOTAL COST
COMPETITION FORM:
Names of team members:
_______________________________________________________________________________
100 ml of purified water at the judge’s table along with this paper (10 pts) _____________
Arrival Time at Judge’s Table (total seconds/minutes for purification) _______________
SCORING of the PWWTD
20 pts
COST
less than $150
15 pts
$151 to $180
10 pts
$181 to
$200
5 pts
more than
$201
MINUTES FOR
PURIFICATION
100 ml in less
than 1 minute
100 ml in 1 to
3 min
100 ml in
3 to 8 min
COLOR of
water
colorless
pale
colorful
took more
than 8
minutes
dark-black
CLARITY of
water
clear
slight turbidity,
little bit of
debris
cloudy with
debris
flashflood
turbidity
What is the definition of primary waste water treatment (10 pts)?
TOTAL SCORE ________________
Verified by _________________________________________ (judge)
TOTAL pts