How Do Different Technologies Remove Grit? VIDEO

Featured Product from Smith & Loveless, Inc.


Published on Jun 23, 2016

How well do five different technologies remove grit? In this 2 Minute Update, we'll help you, the wastewater pro, see how these technologies remove grit. Let's get started.
Grit removal efficiency measures how much grit enters and how much grit exits the system. The grit removal efficiency is the percentage of grit the technology removed.
Let's see how these 5 technologies perform when comparing their advertised removal efficiencies.
The top technology is the forced vortex grit chamber with baffles. the v-force baffle and the variable inlet and outlet baffle technology had the highest grit removal efficiency with 95% of 105 micron coming in first place.
The stacked tray design, which uses settling, came in next with a grit removal efficiency of 85 to 95% of 105 microns. Full disclosure - the stacked tray’s grit removal efficiency drops at peak flow when compared to average conditions.
Tied for third place were two other settling technologies, aerated grit basins and detritors both at 95% of 200 microns.
Coming in fifth place was sloped bottom grit chambers. They had a grit removal efficiency of 95% of 300 micron, 85% of 210 micron and 65% of 150 micron. When researching sloped designs, always consider the effects of unwanted and excessive organic capture and less than advertised efficiencies. Why are they less efficient? They are often undersized for the sloped floor design and fail to account for settling principles, which prevents them from even meeting these stated efficiencies.
When you sum up these results, hydraulics and the forced vortex grit chamber with baffles outperforms all settling technologies. Visit grit the facts.com for more info.