Self-Sufficient WRRF Completes In-House Grit Removal Upgrade

Aging, inefficient aerated grit facilities at North Davis Sewer District’s (NDSD) treatment plant headworks not surprisingly caused the typical headaches of poorly performing headworks:  downstream process tanks filled with grit and process equipment wore much faster than it should. And not surprisingly, it became a costly hassle for plant staff with annual basin cleanouts.

What is surprising is how the District chose to combat the problem. Rather than undertaking the traditional design-bid-build approach to upgrade with new system equipment, NDSD employed a resourceful in-house, design-build plan that focused on involving all 24 members of the plant staff to design and install and maintain a new grit removal system placed inside the existing tankage of the original aerated grit chambers.