High Rate Solid Contact Clarifier By Jitendra Watertech -...

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Product Description

Process: Treats raw and waste water, producing clarified water of highest quality the principle here is that if preformed flocs particles are feed back to mix with the incoming water, the microfloc particles in the raw water are captured much more rapidly and efficiently. The sludge is older and therefore more consolidated. Surface rating for these types of clarifiers are higher (3 – 4 m/h), coagulant usage less and wider range of water qualities can be tolerated.

Applications:

Clarification of surface water
Lime soda softening
Removal of colloidal silica
Colour removal
White water recycling
Primary (physico-chemical) treatment of waste water
Removal of heavy metals in the chemical and automobile industries

Principles Of Operation:

Coagulation/Flocculation:

Colloidal particles of color, turbidity and suspended solids brought together by coagulants
Coagulated particles made heavy by flocculants
Heavy flocs made to settle down
Substantial concentration of previously formed flocs, recycled for ‘seeding effect’ responsible for speedy flocculation

Hydraulic Separation:

Uses up flow design to move water into settling zone for clarification

Operating Features:

Energy efficient design
Removes suspended solids and turbidity by a physico-chemical
Uses minimum time, space, chemicals
Uses alum, FeSO4, FeC13, NaAlO2 for coagulation
Uses polymer for flocculation
Uses lime and Na2Co3 for chemical precipitation
Intimate and prolonged contact with large quantities of previously formed flocs.
Entire bottom used for settling and collection of dense floc precipitates
In-built flash mixer, floculator and thickening pickets concentrate the settled sludge.
Tangential water inlet
Slowly moving multiblade scraper carry settled flocs into the sludge.
Mechanisum are suspended from fixed bridge.
Flash mixing and slow speed agitation require low retention time.
Simple to operate
Circulation flow can be varied to suit different loads

Advantages:

Low power consumption, Rapid chemical and more complete reactions
High sludge Consistency
Provides greater flexibility
15 – 20 % reduction of chemical required
Thorough contact with solids regardless of thorough put
Minimum possibility of carryover
Minimum amount of water lost by blow-off
Minimum operator attention required
Dense, easily settled precipitates, Simplifies maintenance, lowest effluent turbidity
Low capital cost, space saving, compact, easy operation
Minimizes dewatering cost of downstream equipment