Method to reduce sediment in water storage sump
Here we considered a case in which underground bore water is pumped out in to sump storage tank.
If bore water directly pumped to storage tank, all sediment content in bore water will be transferred to sump tank, it will add sediments day by day. Finally after few months, sediment removal from sump tank will be a big project. Sediment dumped regularly in sump will reduce sump’s water storage capacity. It will increase bacteria level and other impurities. Finally during sediment removal from sump tank, we need shut down with no water supply to consumers for a specific long duration of a day.
Here a little correction is shown to avoid huge quantity of sediment settling in water sump. By this method, we may reduce sump sediment deposition more than 90%.
We need to add following two devices in bore water outlet,
- Disc filter and
- Settling tank.
Disc filter prevents flow of sediment in pipe line above certain microns. Sediments collected in disc filters may be drained out on line or washed out afterwards.
Bore water afterwards allowed to enter in a conical bottom tank. In this tank appropriate quantity of alum is added for settling of sediment for few hours. After settling duration completion, water can be discharged out in water storage sump and water with concentrated sediment can be drain out from bottom drain point of tank. Here the settling tank should be with conical bottom. If water consumption is higher, we may repeat this procedure multiple times in a day. Generally settling duration varies according to type of sediment, but on an average sediment settling duration is 4 to 8 hours.
This method reduces sump sediment deposition quantity as well as it increases duration of cleaning cycles.
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