“Good insects” are called “aerobic” because they need oxygen dissolved in water to survive. In most water, enough oxygen is dissolved for “good” insects to stay alive. From the top, the water flows very slowly through the rest of the sand and is further cleaned by physical filtering and some biological action. The water at the bottom of the sand layer is very clean and biologically purified, so it is allowed to flow into a storage container. The sand does not need to be replaced, but sometimes filter operators decide to change the top 2 centimeters of sand instead of just cleaning it. High-speed sand filters have a filter rate of 15 to 20 gallons per minute per square foot of filter surface.
In addition, it is possible to loosen the collected particles, although they can be recaptured deeper into the bed. Finally, a grain of sand that is already contaminated with solid particles can become more attractive or repel the addition of solid particles. They do not require special care and can be installed in any removable pool. This type of filter uses sand as a filter agent in its tank.to retain the impurities in the pool water.
You don’t need to add sand to your filter after a backwash, as everything stays in the tank. When counter-rinsing an ED filter, it actually flushes the ED, along with the dirt trapped in it. That means that every time you rewind, you also have to add a new DE to the system. The biggest disadvantage of a sand filter compared to a cartridge filter is the replacement of the filter media. Replacing an ink cartridge is easy to do, and you can usually wash and reuse a cartridge. Changing the sand means opening the top of your tank and collecting or sucking all the sand through a narrow hole.
So if someone comes into the pool with dirty feet, this filter will help to take care of them. Instead of being a new concept, sand filtration has been used for centuries. Sand helps encapsulate debris present in the water and helps keep it clear. But you aquarium equipment will definitely have to learn a little more when using a sand filter with your pool. Because the sand rests on what are known as “sides” at the bottom of the filter, increased pressure can break for too long, causing expensive repairs or replacements.
In this mode, the water is filtered and returned cleanly to the pool by the check valve. This is the function/position in which the filter unit will remain most of the time. The process will be completed when the water being drained becomes clear. We recommend that you use the backwash feature at least once a week. The sand filters are also certified according to the European standard, which guarantees compliance with current safety regulations.
This entry was posted in Study and construction of slow sandwater filters. Seawater is naturally filtered through the sand and collected through a set of pipes and ducts and then pumped to the surface to be taken to the desalination unit. Laboratory efficacy studies of slow sand filters with an adult biolayer have shown a variable viral reduction of 99.98% protozoa, 90-99% bacterial and viral.