Presentation_on_Effluent_Treatment_Plant.pdf

FOR CIVIL ENGINEERS

1. Presentation on Effluent Treatment Plant
By
Ratnadip

2. What are the Effluents ?
Effluent is any liquid waste (other than surface water and domestic
sewage) that is discharged as a bi-product of their production.
The effluent contains several pollutants, which can be removed
with the help of an effluent treatment plant (ETP)

3. Why is to be Treated or Purified?
Effluents carries contaminants within it that need to be treated and
removed before the water can be safely discharged to Ground or
directly recycled and reused.

4. Flow Diagram for the Treatment of Non –Oily Water















DM Plant N-
Pit
Boiler
Blowdown
CT
Blowdown

Boiler TG
Wash
Central
Monitoring
Basin(Twin
Compartment)
HRSCC/
Clarifier
DMF
Guard Pond

To Ash
Dump Area
Ultra Filter
System
Reverse Osmosis
System

Degasser
Tower/Tank
CW/PTP
Ash Silo
Effluent

5. Function of HRSC
The Solid Contact Clarifiers is designed to remove the suspended
solids(Colloidal) and high turbidity in the water. These systems contains
Dosing System, clarifloculator tank inbuilt with settling zone. These
clarifiers have the ability to offer turbidity less than 10 NTU at the
outlet of clarifier.
Removes Turbidity and Colloidal Suspenstion by the Chemistry of
Coagulation And Flocculation.

7. Dual MediaFilter
Removal of colloidal (usually destabilized) and suspended material from
water by passage through layers of porous media. Efficient Turbidity and TSS
Removal.
Function
Filtration is usually the final step in the solids removal process
The sand removes particles from the water through adsorption and
straining
Straining is caused by a layer of suspended solids (from the feed water)
which builds up on the upper surface of the porous media

8. Filter media
Suspended solids
Flow
Top of filter
media

9. manifold-lateral system beneath the gravel as shown
below.

10. Anthracite
Fine Sand
Medium Sand
Coarse Sand
Pebbles

11. ULTRA FILTRATION
Function
It removes colloidal silica, Bacteria, viruses, proteins and dyes
The UF Module seperates molecules from solution on the basis of Size.
The pore size and Molecular weight cut-off are often used to Characterize a
membrane.
The pore size = Nominal Diam. Of micro pores in membrane
The MWCO is the Molecular Mass or weight of solute that rejects
greater than 90%.

13. RO uses the operating pressure higher than the osmotic pressure of salt
present in water, to drive pure water through the Membrane, thereby
rejecting the salts.
It is reversal of the osmosis process where water flows from the Higher
Concentration solution to the lower concentration solution to attain
natural Equilibrium,
Reverse Osmosis
Function
It removes all the organic molecules and monovalant ions.