SEDIMENTATION STUDIES APPARATUS

Product Description

When a particle fall in a fluidunder constant force, e.g. force of gravity, then particle accelerates for sometime, but when the accelerating force equals the retarding force (Buoyant forceand Drag force) then the resultant force acting on the particle will be zero,and particle quickly reaches velocity, which is the maximum attainable underthe circumstances and which is called the terminal velocity.

When slurry is prepared in acontainer and then allowed to remain undisturbed for some time, four settlingzones will appear as below: A Supernatant Layer C Transition Zone B Slurry ZoneD Concentration Sludge Zone.

With the passage of time, theheight of the different zones will vary and ultimately zone A of clear liquidand zone D of the sludge will be left.

When all the solid particlessettle in zone D, then this is critical stage and after this no settling takesplace. With further passage of time, the height of the zone D will decrease dueto the compression of the sludge on account of its own weight. Settling can befree settling or hindered settling.

But most of the slurries settleunder hindered conditions. Free settling is that in which the motion of oneparticle is unaffected by the motion of the other particle while in case ofhindered settling many particles are present so there is mutual interference inthe motion of the particles and the velocity of motion or rate of settling isreduced.

The present set-up with 5 Nos. ofBorosilicate Glass Graduated Cylinders is designed to study the zone settlingdepending upon the concentration and characteristics of the particles.

These cylinders can be easilyremoved for cleaning.

Rate of change in height of thevarious liquids/solids interfaces with respect to time can be measured with thehelp of stop watch.

Experimentation of SedimentationStudies Apparatus

To determine Effect of initialconcentration and initial suspension height on sedimentation rates. Effect ofparticle size distribution. Use of flocculating additives.

Features:

Reasonably priced

Damage-resistant

Efficient performance