Preliminary Treatment
What is another name for preliminary treatment?
Pretreatment
Who sets the standards for water in Minnesota?
Minnesota Department of Heath (MDH)
What piece of equipment is used for measuring the volume of a liquid?
Graduated Cylinder
Where does water come into the plant?
The intake station
What does PWS stand for
Public Water supply
What does a comminuntor do?
Shreds/grinds
Who regulates wastewater in Minnesota?
Minnesota Pollution Control Agency (MPCA)
What have we used in class that uses voltage?
ph Meter
Taste, odor, appearance are what type of standard?
Secondary
What is an aquifer?
An underground layer of gravel, sand, sandstone, shattered rock, and limestone
How often should grit be removed?
Daily
What does SDWA stand for?
Safe Drinking Water Act
What are the pH standards? Color and Number
-pH 4 (Red)
-pH 7 (Yellow)
pH 10 (Blue)
How do we treat water? (3 ways)
Biologically
Chemically (layered Defense)
Physically
What are water towers for?
Store and deliver pressurized water to the Community.
What dangerous gas can be produced when there is no dissolved oxygen present in the preliminary treatment?
Methane and Hydrogen Sulfide
What does NTNC-PWS stand for?
Non-transient Non-community Public Water Supply
What temp in Celsius is the drying oven?
103 C + -2
What are the "Forever Chemicals"?
PFOS and PEAS
Which is legally enforceable standard, National Primary Drinking Water Regulation or National Secondary Drinking Water Regulation
National Primary Drinking Water Regulation
What do recording meters indicate?
How the valve of a variable has changed with time
There are 2 basic methods for drilling wells, what are they.
the cable tool method and the mud rotary method
At what temp is water most dense?
4 C
What percent of water supplied in the US is surface water?
75%
What are the 2 different hardness tests we did in class?
Total
Calcium