Effect of Bleaching in shrimp farming.

Hello everyone:
         Today we will see the effects of Bleaching in shrimp pond.

In shrimp farming, we use different source of water like bore, creek, well, sea water. Whatever it is, we will go for bleaching as a disinfectant. Based on the source , the percentage of Bleaching varies.

What the bleaching powder contains?
           It contains chlorine, it is an active reactive compound for disinfectant. Most of the bleaching powder have different percent of chlorine. Based on that we can calculate and go for bleaching.

Which time can I go for bleaching?
          If you have an treatment tanks means, you can go for bleaching on that tank. After Bleach you can pump water to growout. Bleaching can actively oxidizes the organic matter, it kills pathogens, 
Sometimes pests, it kills planktons.. so it is better to go for Bleaching before fertilization.

How it kills microorganisms?
          Chlorine compound have more electrons. So these electrons can easily replace the hydrogen ions which is present in the enzymes. By this way, it breaks the chemical bonds and change the shape of cell. It also leads to failure of multiplication of microorganism, which leads to death.
             Chlorine present in different forms like chlorine gas, sodium hypochlorite and calcium hypochlorite.

Calcium hypochlorite dissolves in water and produces Hypochlorous acid and hypochlorite ion.
This Hypochlorous acid is very fast reactive compared to hypochlorite ion. But it needs certain pH for effectiveness.

At pH of below 7, there is a effective reaction of Hypochlorous acid occurs. 

         Temperature also plays important role in treatment. Certain high temperature causes fast reaction.
         you applied Bleaching in your pond, if your pond have high organic matter then you needs extra chlorine for proper disinfection.
         If your water in turbid condition, then don't go for Bleaching. First settle the water and go for Bleaching. Because, suspended solids present in the water prevents the reaction of chlorine.
    
Care :
        The person who apply Bleaching must equipped with safety clothes. Excess chlorine cause many problems to humans like skin irritation, some respiratory problems etc..
        The Bleach must be stored in absence of sunlight. Presence of UV split the chlorine molecules.
       Apply Bleach in the water with optimum pH.

 Dechlorination:
       Chlorine only reactive for few hours based on microorganisms. So we must do dechlorination. It is the process of removal of chlorine residues from water. If it present means, then it reacts with compounds present in water and produces various compounds.
        Normal aeration will decrease the chlorine residues from the water. 
        After checking the chlorine level then go for fertilization. 

Importance :
        Nowadays, disease prevention is most important one. Many of the farmers opens the farm water into any creeks without treatment. It also leads to disease outbreak. So disinfection is very important for all types of ponds in your farm. 

For more info contact........ Thank you 😊.

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