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I am in the team Stacked Rapid Sand Filtration- Bench. This semester we did three studies: self-healing test, depth filtration study and energy dissipation rate study.
In the self-healing test, we found that it is hard to let the sand bed itself control what the flow distribution will be, and the surface removal dominated in the filtration process. The depth filter test reveals that surface removal was dominated in the self-healing test. For the energy dissipation rate test, we assume the filter performance would improved with the increasing energy dissipation rate, while current experiments have not show the result. So further test should be addressed in the energy dissipation rate study.