Exam (elaborations)
Class B water Exam
- Course
- Institution
Exam of 12 pages for the course Master ASL! Unit 6 at Master ASL! Unit 6 (Class B water Exam)
[Show more]
Seller
Follow
modockochieng06
Content preview
Filtration rate for rapid sand filters?2-6 gpm/ sq ft
List the characteristics of the coagulation process?
Type of reaction ( physical-chemical)
Time required ( reaction complete in seconds)
Mixing intensity ( high intensity mixing is required for proper coagulation)
Brainpower
Read More
Previous
Play
Next
Rewind 10 seconds
Move forward 10 seconds
Unmute
0:05
/
0:15
Full screen
Name the advantages of dual and mixed media filters over plain rapid sand filters??
Higher filtration rate and longer filter runs
Proper way to re fill rapid sand filter that was been out of service
Slowly fill the filter through the backwash valve
List the characteristics of polymers?
Cationic ( net positive charge )
Anionic ( net negative charge )
Non-ionic ( no net charge )
Name the characteristics of the flocculation process??
Type of reaction ( physical )
Time required ( 20-30 min )
, Mixing intensity ( Controlled slow mixing )
Coagulants typically used in the water treatment industry
Alum or aluminum sulfate Al2(SO4)3
Iron salts: Ferric Chloride (FeCl3), Ferrous Sulfate (FeSO4)
Low molecular weight cationic polymer
What is the optimum pH for coagulation
Alum: pH 5-7
Iron salt: pH 4-11
Cationic polymer: effective over a wide pH range.
Alum or aluminum Sulfate
Al2(SO4)3 : pH 5-7
Ferric chloride
FeCl3 : ph 4-11
Ferrous sulfate
FeSO4 : pH 4-11
Typical rapid sand filter rate??
15 gpm/ sq ft or 24 inch rise/ minute
The overall change on a colloidal particle is determined by measuring what??
Zeta Potential
What may develop as a result of inadequate backwash of rapid sand filter??
Mudball formation
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 modockochieng06. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now