IJIFR VOLUME 3 ISSUE 12 AUGUST 2016

ISSN: 2347-1697
International Journal of Informative & Futuristic Research (IJIFR)
Volume - 3, Issue -12, August 2016
Continuous 36 th Edition, Page No: 4626-4649
2.1 Hydrodynamic Separation In Practice
The Importance of Internal Component Design
Real flows tend to be far more complex than implied by some of the descriptions provided above. In
particular, vortex flows, if not adequately controlled, can become unstable, which, in the context of a
separation system, can actually be detrimental to performance? A known weakness of the original US
EPA Swirl Concentrator was that material tended to settle out on the base, rather than passing to the
extraction point at the centre (2).The modern systems of today, often termed ‘advanced vortex
separators’, have evolved to overcome the difficulties mentioned above. Optimal design of the
internal components helps to control flow patterns, so as to enhance the quality of separation
performance. In the context of storm water treatment applications, a body of research has developed
to demonstrate how internal components are important in ensuring that captured solids are not
subsequently re-entrained and lost following their initial separation, a phenomenon that would appear
to explain shortfalls in the performance of many alternative designs of system. The result of many
years of evolution and refinement of hydrodynamic separator designs that the systems of today are
both effective and economical, presenting potential for reduced land-take requirements, and hence
reduced construction costs compared to other more conventional solutions.
3. OBJECTIVES
The primary objective of this project is design and develop a robust Hydrodynamic Vortex
Filter that can effectively filter rainwater contributed by the runoffs originating from all the
environments such as roof tops, roadways, industrial or commercial complexes; and also
which can be fitted in existing storm drain systems. The objective is branched into four parts.
• Analysis of rainwater collected from different points of origination that are evaluated
and identified as effective regions for rainwater harvesting.
• Design of prototype with idealized parametric values of physical dimensions and
required quality of resulting outflow.
• Optimization of the design for focused range of water quality output considering
variations in inflow quality and quantity.
• Analysis of the resulting filtered water and evaluating the physical parameters in
comparison to usage standards.
4. DESIGN CONSIDERATIONS
• Match site considerations for physical dimensions of seating space of the filter as well
as the catchment area of the runoff.
• Prevent re-suspension of particles by using small drainage areas and good
maintenance.
• Retrofits should be designed to fit existing inlets.
• Placement should be accessible to maintenance with ease of cleaning filter media.
• If used as a part of Erosion and Sedimentation Control feeding to surface water
sources, then entry grid grates have to be reconfigured and enough volume of sediment
chamber is to be provided.
• Design for peak hydraulic capacity for average highest recorded rainfall measured in
the site location and provide overflow provision so that storms in excess of the
S.V.Tarun, G.M.Swamy :: Design And Development Of
Hydrodynamic Vortex (Up-Flow) Pretank Rainwater Filter
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