[gumusonur]

hi,

we have water system for make industrial product in my company. recently i have bacteria problem . i think in our system have biofilm. how can we eliminate this from our system.
i will wait your reply. 

thanks..

[Enthalpy]

Hi, there are certainly many means to kill bacteria, like soap, hypochlorite, "percarbonate"... but this depends on what your setup can accept.
After the bacteria are killed, an existing biofilm may well remain. Mechanical action (coupled with some cleaning agent) works best against it, where possible.

[gumusonur]

Entalpy, I don't want to dismantle the whole system. I thought of using sodium hypochlorite. will it be enough to just pass through the pipes? Or do I have to wait? I don't know how many percent from sodium hypochlorite should I use?

thanks..

[Enthalpy]

Hypochlorite is excellent to kill bacteria. So-called percarbonate is a safer compound with about the same effect, also available in supermarkets.
https://en.wikipedia.org/wiki/Sodium_percarbonate
https://en.wikipedia.org/wiki/OxiClean and competitors
As you know from house cleaning, bleach without rubbing leaves the films in place, just sterilised.