Changes

**The first baffle slows the incoming water flow, encouraging any larger, heavier particles to drop out of the water,

**The first baffle slows the incoming water flow, encouraging any larger, heavier particles to drop out of the water,

**A second baffle skims the surface of the water, preventing floating debris, oils and grease from passing,  

**A second baffle skims the surface of the water, preventing floating debris, oils and grease from passing,  

*Another option is a hydrodynamic device, which forces the incoming water flow into a circular vortex:  

*Another option is a hydrodynamic device, which forces the incoming water flow into a circular vortex:  

**This motion forces the larger, heavier particles are outwards and downwards into a lower chamber,  

**This motion forces the larger, heavier particles are outwards and downwards into a lower chamber,  

**Floating debris, oils and grease are trapped behind a baffle or in small tank area, towards the top of the main vortex chamber. </p>

**Floating debris, oils and grease are trapped behind a baffle or in small tank area, towards the top of the main vortex chamber. </p>

===External Links===

===External Links===

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[[category:pretreatment]]

[[category: Pretreatment]]