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Since, I have assessed another alternative design for the entrance tank that features the use of one or more Fernco flexible fittings as an "adjustable weir" configuration on the drain stopper pipes. This design is clearly more cost effective than any of the previous considerations. Upon completing this study, it is going to be subject to future laboratory research before implementation in Agua Clara plants.
Spring 2014 Contributions
I have worked with Runpeng Yu on updating the weir control system on the Stacked Rapid Sand Filters (SRSF). Our goal was to devise a means to adjust the backwash flow rate from the filter inlet channel. This is advantageous to plant operators in cases where the plant is not operating at the entire design flow rate. This is needed because in such cases, the backwash flow rate is too low and the desired bed expansion is not achieved during backwash.
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