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If these deposits cannot be eliminated by pretreatment of the water, we recommend the following
cleaning procedure:
Material and Equipment
* A well ventilated working place.
* 2 small containers (1 liter), 2 large containers (15 liter) and a stirring stick, all resistant to
chemicals, preferably of polypropylene.
* Plastic rope to tie up the disc.
* Sodium Hypochlorite NaOCl -
Strong oxidizing liquid, commercial concentration: 10%.
Oxidizes and removes organic and biological deposits.
* Hydrochloric Acid HCl -
Very corrosive liquid, commercial concentration: 30%.
Dissolves and removes carbonates, iron oxide, and other deposits.
Safety equipment: safety glasses, gloves, long pants, long sleeved shirt and shoes.
ATTENTION!
While working with chemicals protect yourself with the necessary safety equipment:
* Safety glasses, gloves, protective clothing
* Work in a well ventilated area
* Follow the manufacturer
’s instructions
Cleaning Organic and Biological Deposits
Open the filter and remove dirty discs.
Attention
– Never open the filter before the pressure has been released.
* Arrange the discs loosely on the plastic rope
* Prepare a 5% Sodium Hypochlorite solution:
1) Pour 5 liters of water into one of the large containers.
2) Add 5 liters of Sodium Hypochlorite (10%) into the water.
* Soak the discs in the solution so that both sides are covered. To achieve maximum cleaning,
agitate the discs several times with a stirring stick.
* Contact time with cleaning solution: up to 8 hours
* Remove the discs carefully from the solution, put them in the second large container and rinse
them very well with clean water before placing them back in the filter.
* We recommend flushing the cleaned discs again in the filter to ensure that all chemical residues
are removed.
The cleaning solution can be used for several sets of discs. As the cleaning activity of the solution
deteriorates, it may be necessary to soak the discs for a longer time.