| 摘要 |
The equipment incorporates a tank that contains a moving bed of sand and inside which there is the device of the invention, which comprises a tubular pumping device associated with a space coaxial with an inlet conduit for the water to be treated and with outlets for said water within the bed of sand, including a sand washer placed in the upper part of the pumping structure, and also an outlet conduit for clean water and an outlet conduit for dirty water. Novelty focuses on the tubular pumping structure, which includes a fluidizing nozzle and also a lateral injection of air, with the interposition of a laminar filtering body.
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