A fine screen that has caught a lot of objects. You can see things like rags are a common problem with screening.

Possible Opportunities

Odor
  • Facilities may exchange air from headworks buildings to reduce odor (typically hydrogen sulfide gas, H2S)
  • Controlling ventilation air with hydrogen sulfide sensors can reduce ventilation energy consumption
Channel Mixing
  • Some headworks buildings will mix wastewater to reduce solids dropout in distribution channels
  • Mixing can be blower air, compressed air, or mechanical mixing. 
  • Some newer mixing technologies such as "wedge mixing" can reduce mixing energy consumption
Install a Mechanical Cleaning System for Coarse Screening
  • Manual cleaning requires labor
  • If the screens are not clean often enough it could lead to clogging and hold up the process
  • It is important to consider the type of screens they have and if they would need to replace the whole system to add mechanical cleaning
Add Fine Screens After Coarse Screens
  • Fine screens would not get clogged as quickly if coarse screens come first
  • The fine screens can reduce the suspended solids to very small levels
  • The smaller the suspended solids, the easier on the equipment coming after screening
  • It is important to consider if they would benefit from the finer screens
Install a Rotary Drum Screen
  • It cleans itself and can reduce maintenance costs for filtering
  • Wide range of flow rates can be sent through without a problem
  • It is important to consider how important screening is and the potential cost benefits as the implementation can be expensive