Define alum (aluminum sulfate) caogulation, Civil Engineering

Assignment Help:

Define Alum (aluminum sulfate) Caogulation

  • Purchased as dry or liquid alum { Al2(SO4)3,14 H2O}, MW 594 (other formulas with varying number of water molecules also used)
  • 48.8% alum and rest water
  • When alum is added to water containing alkalinity (pH 5.5 to 8.)

 

206_Define Alum (aluminum sulfate) Caogulation.png

  • Each mole of alum uses 6 moles of alkalinity (HCO-3) and produces 2 moles of aluminum hydroxide (solid precipitate) and 6 moles of CO2 which decreases the ph
  • However due to the presence of alkalinity pH won't lower drastically If there is not enough alkalinity, lime (either as CaO or Ca(OH)2 ) or soda ash (Na2CO3) can be added to prevent pH from lowering due to the coagulation reaction.

Related Discussions:- Define alum (aluminum sulfate) caogulation

HIGHWAY CONSTRUCTION & MAINTENANCE, what is the difference between feasibil...

what is the difference between feasibility study and traffic counting

Calculate surface loading rate for each clarifier, A wastewater plant is op...

A wastewater plant is operating at 10MGD with a suspended solids concentration of 200mg/L. It has 6 clarifiers operating in parallel. Each clarifier is 40 foot in diameter and 10 f

Design storm water drains to match soffit, Question Why is it best to desig...

Question Why is it best to design storm water drains to match soffit? Answer Storm water drains gather storm water in their corresponding catchment areas throughout rainst

Define compression - actions in pot bearings, Define Compression - Actions ...

Define Compression - Actions in POT Bearings? Vertical load is carried through the piston of the bearing and it is resisted by the elastomeric pad. Elastomer is incompressible,

Survey, 3-d figure of line ranger

3-d figure of line ranger

Theory of structure, whatismeanby shear force and bending moment

whatismeanby shear force and bending moment

Determine the meaning of prestressed concrete, Determine the meaning of Pre...

Determine the meaning of Prestressed Concrete It is a type of concrete in which permanent internal stresses of  a suitable nature, magnitude and distribution are intentionally

Define limitations of radiography - inspection of bridge, Define Limitation...

Define Limitations of Radiography - Underwater Inspection of Bridge? i. Radiography is a costly and time consuming method, which re- quires extensive safety measures to be adop

Biological wastewater engineering, a. We put a lot of time and effort into ...

a. We put a lot of time and effort into cultivating our activated sludge microbial community. So why do we waste sludge out of it? b. A wastewater discharges to Puget sound, a mari

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd