LO
QUESTIONS WITH CORRECT
SOLUTIONS ALL VERIFIED BY
YC
AN EXPERT A+ GRADED
(LATEST)
D
U
ST
,Identify the parameters of concern for source water improvements.
1. solids/ turbidity-measure of matter in water
2.temperature-affect on water density
3.color, taste, and odor-microorganisms produces metabolites like Methylisoborneol (MIB) and
Geosmin.
K
Watershed->NOM->TOC that include humic and fulvic acid
4.nitrogen and phosphorus nutrients- cause microorganism to grow and they come from septic
C
systems, wastewater plants discharge, farm runoff...
5.organic carbon- 2 groups: NOC and SOC/VOC
LO
natural organic carbon (NOM): include fulvic and humic acid that come from rock formation.
synthetic organic carbon and volatile organic carbon (SOC/VOC): come from industrial and
chemical waste
YC
6.microbial pathogens- contaminates such as GIARDIA and CRYPTOSPORIDIUM. present in
rivers and streams are caused by septic systems, wastewater plants discharge, farm runoff...
a + fecal coliform test mens the contaminates are present
D
7.metals-can be toxic and bio-accumulative., regulated by the SWDA that sets the Max.
Contaminant Level (MCL).
U
8.oil and grease-prevent oxygen from dissolving in water
9.dissolved oxygen- lack of oxygen in water, hydrogen sulfide and sulfur are present & causes
ST
iron and manganese to be released causing taste and odor problems
Describe source water improvement methods
reservoirs- have slow movement which allows solids to settle
aeration- saturate water with oxygen.
oxidizes iron and manganese, remove dissolved gases, cools hot water...
reservoir destratification- remove temperature layers.
,TRUE OR FALSE: copper sulfate effectively controls all types of algae at low doses
False, dose depends on water temperature
Solids and turbidity come from urban runoff, streambank erosion, agricultural runoff, and
______.
a. point sources
b. stack emissions
K
c. treatment sludge
d. algae
Algae
C
Sources of nitrogen and phosphorus are septic systems, landfill leachate, urban and agricultural
LO
runoff, animal feed lots, and _______.
a. the air
b. wind
c. sunlight
d. all listed
YC
The air
Some metals are removed by ______ and ______.
a. screening, filtration
b. coagulation, adsorption
D
c. coagulation, screening
d. aeration, adsorption
Coagulation and absorption
U
Reservoirs provide a quiet zone of _______ for sedimentation
ST
a. no movement
b. wave action
c. wind currents
d. slow movement
slow movement
Aeration oxidizes iron and manganese forming ______ removed by sedimentationa. insoluble
precipitates
b. soluble precipitates
c. coagulated solids
, d. insoluble coagulants
insoluble precipitates
Disadvantages of spray aerators are moisture from drift, water loss to evaporation, down time in
freezing weather, and ______.
a. wood rot
b. loud noise
c. biological growth
d. strong odor
K
Biological growth
C
Cascade aerators are waterfall devices that create turbulence for oxygen transfer, odor and gas
removal, and some disinfection by ________.
a. wind
LO
b. sunlight
c. agitation
d. aeration
Sunlight
YC
A pH change in aerated source water occurs if ______ was present.
a. calcium carbonate
b. ferric sulfate
c. sodium bicarbonate
d. carbon dioxide
D
Carbon dioxide
U
_________ is an odorless gas that flashes off upon aeration.
a. Methane
b. Hydrogen sulfide
ST
c. Ammonia
d. Oxygen
Methane
Free-flowing streams usually have small traces of ______ and ______, due to runoff, then
concentrates them in reservoirs.
a. Fe, Mn
b. CO2, H2S
c. NH3, O2
d. H2, O2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Studyclock. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
