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Low Flow Stacked Rapid Sand Filters are an adaptation of rapid sand filters optimized for flows less than 3 L/s. SRSF is a game changing technology invented by the AguaClara team that is significantly simpler to operate than conventional rapid sand filters. LFSRSF are currently being built in AquaClara plants in India to treat flow rates of around 0.8 L/s.Excerpt
Spring 2014
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This semester, the team aims to complete fabrication of the 30 cm LFSRSF, which includes a simplified hydraulic control system. The team will add slotted pipes and sand to the filter box, as well as pipe stubs to the inlet and outlet tanks. They will also build a recycle water source to facilitate hydraulic testing of the filter. Testing will involve evaluating the headloss necessary to fluidize the sand bed of the filter during clean and clogged conditions, determining the head required to initiate backwash, and measuring the flow distribution between filter layers. The team will also simplify the sand drain design and and develop a better method to open and shut it. FinallyFinally, the team will optimize pipe sizes, elevation and sizing of the filter to improve access and efficiency. |
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