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The discharge of raw sewage into the sea can create a health hazard, while in coastal areas, sewage can also lead to oxygen depletion and an obvious visual pollution - a major problem for countries with large tourist industries.


MARPOL 73/78, Annex IV prohibits the discharge of sewage into the sea, except when the ship has in operation an approved sewage treatment plant or is discharging comminuted and disinfected sewage using an approved system at a distance of more than three nautical miles from the nearest land; or is discharging sewage which is not comminuted or disinfected at a distance of more than 12 nautical miles from the nearest land.


ROCHEM CHLORINATING TABLETS are 3” in diameter, each 200 gm tablet contains 180 gm available chlorine and are slow dissolving to have the sanitizing power of 90% available chlorine.   Each tablet has powerful disinfecting, deodorizing and germicidal properties developed specifically for sewage affluent treatment prior overboard discharge in compliance with MARPOL 73/78, Annex IV.





Appearance          :          Tablet.

Physical state       :          Solid

Odour                     :          Characterstic (Chlorine like)

pH                          :           3 to 3.5 (1% solution @ 25 deg C)

Solubility               :           Easily Soluble in cold water.





Place ROCHEM CHLORINATING TABLETS in the dispenser and regulate the flow of sewage affluent as recommended by the Sewage Treatment Plant OEM. One ROCHEM CHLORINATING TABLET treats: 90,000 litres at 2 PPM, 36,000 litres at 5 PPM and 18000 litres at 10 PPM.

Use Rochem Chloride test kit or Rochem Chlorine test strips to measure and record the Chloride content of the sewage affluent and adjust the dosage accordingly, if required.




Keep container tightly closed & store in a cool, well ventilated area, away from acid, alkalies etc. Avoid contact with skin or clothing.  Wash with large quantities of water in case of contact with eyes for 15 minutes and see a physician.  As with any chemical, use proper PPE for handling like goggles or face shield, rubber gloves, boots etc.





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