Oge Anyene's Individual Contribution Page

Fall 2015 Semester Contributions

High Rate Sedimentation Team

The current model of the AguaClara sedimentation tank has a residence time of approximately 24 minutes, making it the rate limiting step of the water filtration plant. This semester I will be working towards my subteam's goal of increasing the upflow velocity in the AguaClara sedimentation tank by a factor of 2 to 10 without degrading the performance of the tank. This will significantly decrease the residence time of the sedimentation tank; therefore, the water filtration plant process will be expedited. In order to achieve this desired upflow velocity we will be considering and experimenting with the following parameters:

• The geometry of the overall sedimentation tank
• The geometry and capture velocity of the plate settlers above the floc blanket
• The geometry and capture velocity of the potential plate settlers in the floc blanket
• The correlation between the plate settlers with a capture velocity of 1 mm/s and the plate settlers with a capture velocity of 0.12 mm/s
• The transportation of flocs to the floc hopper when there is a high upflow velocity in the sedimentation tank