HIGH RATE SOLID CONTACT CLARIFIER EBOOK DOWNLOAD!
"Solids-contact" refers to units in which large volumes of sludge are circulated internally. The term also describes the sludge blanket unit and simply means that. HRSCC – High Rate Solid Contact Clarifier. PRINCIPLES OF OPERATION. Coagulation/Flocculation. Colloidal particles and suspended solids brought together. Fluid Systems Manufacture a Wide range of custom-built High Rate Solid Contact Clarifier – HRSCC in India for industrial process water applications, with.
|Published:||14 April 2016|
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The detention times are considerably longer than those offered by higher rate solids-contact units and are necessary for proper flocculation.
In the solid contact clarifiers, high rate solid contact clarifier overflow is removed through a radial launder system that draws water from the complete surface area to avoid solids carryover caused by uneven velocity currents.
Baffles are used to prevent fluid velocities at the tank entrance from extending into the tank; and overflow weirs are used to uniformly distribute flow from liquid leaving the tank over a wide area of the surface to minimize resuspension of settling particles. Lamella clarifier Tube settlers are commonly used in rectangular clarifiers to increase the settling capacity by reducing the vertical distance a suspended particle must travel.
High high rate solid contact clarifier tube settlers use a stack of parallel tubes, rectangles or flat pieces separated by a few inches several centimeters and sloping upwards in the direction of flow. This structure creates a large number of narrow parallel flow pathways encouraging uniform laminar flow as modeled by Stokes' law.
They provide a very large surface area onto which particles may fall and become stabilized.
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Because flow is temporarily accelerated between the plates and then immediately slows down, this helps to aggregate very fine particles that can settle as the flow exits the plates.
Tube settlers may allow the use of a smaller clarifier and may enable finer particles to be separated with high rate solid contact clarifier times less than 10 minutes.
Tube settlers capture the fine particles allowing the larger particles to travel to the bottom of the clarifier in a more uniform form. The fine particles then build up into a larger mass which then slides down the tube channels.
The reduction in solids present in the outflow allows a reduction in the clarifier footprint when designing. Coagulating chemicals may be added in the influent pipe near the point of entry into the recirculation drum.
High rate solid contact clarifiers
Additional treatment chemicals may also be added in this pipe or directly high rate solid contact clarifier the reaction well. In the recirculation drum, initial mixing and reaction take place in the presence of previously formed floc. The chemicals and recirculated sludge are thoroughly mixed with the raw water by large volume turnover accomplished by the turbine.