Exam (elaborations)
Drinking Water Treatment Certification (Study Guide For Water Treatment Certification) –Q&A
- Course
- Institution
Drinking Water Treatment Certification (Study Guide For Water Treatment Certification) –Q&A
[Show more]
Seller
Follow
Studyhall
Reviews received
Content preview
Drinking Water Treatment Certification (Study GuideFor Water Treatment Certification) –Q&A
Colloids Correct Ans - fine particles that do not dissolve
Coagulation Correct Ans - Clumping of particles to form larger
particles caused by use of chemicals (coagulants)
Need for coagulation and flocculation Correct Ans - remove particulate
impurities, especially non settleable solids, and color from ater being treated
Best ph for coagulation Correct Ans - between 5 and 7
Primary purpose of flash mixing Correct Ans - rapidly mix and
uniformly distribute coagulants
primary coagulants/coagulants aids Correct Ans - primary
coagulantes neutralize electrical charge causing clumps. coagulant aids add
density to clumps so floc will not break
methods of mixing coagulants Correct Ans - hydraulic, mechanical,
diffusers and grid system, pumped blenders
hydraulic mixing device Correct Ans - turbulence created by flowing
water to mix chemicals. baffles and throttle valves
flocculation Correct Ans - slow stirring process that causes gathering
of coagulated particles into larger floc particles
advantage of vertical flocculators vs horizontal Correct Ans - require
less maintenance by eliminating submerged bearings and packings
process that removes suspended solids after coagulation-flocculation
Correct Ans - sedimentation and filtration
common lab tests to monitor coagulation-flocculation Correct Ans -
turbidity, alkalinity, color, ph, chlorine demand
, purpose of sedimentation process Correct Ans - remove suspended
solids that are denser than water and reduce load on filters
how is sedimentation accomplished Correct Ans - decreasing the
velocity of water to allow heavier particles to settle out
presedimentation is installed in.... Correct Ans - facilities where water
source is directly diverted from rivers or streams which can be contaminated
by overland runoff and point source waste discharges
point source Correct Ans - discharge that comes from the end of a pipe
why is treatment referred before sedimentation Correct Ans - to
convert finer particles that do not readily settle into larger particles
four zones in sedimentation basin Correct Ans - inlet, settling, sludge,
outlet
pros and cons of double deck basin Correct Ans - pros - provide twice
the surface area of single basin of equivalent dimensions. conserve land area.
cons - higher operation and maintenance costs. entire operation may shut
down if an equipment problem develops in either deck
what material is used to support granular filter materials Correct Ans -
gravel
what units is filtration expressed in Correct Ans - gallons per minute
per square foot
when is filtration process stopped Correct Ans - either just before
clogging, a specified time period has passed, or a specified head loss is
achieved
what aspects of filtration are controlled by the filter control system
Correct Ans - rate-of-flow, split-flow, declining-rate, self-backwash
what is the primary purpose of activated carbon (granular) as filter media
Correct Ans - to remove taste and odor causing compounds as well as trace
organics
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 Studyhall. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78388 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now