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Brine Sludge - composition and disposal

The following request for information was received from the Indian
Petrochemicals Corporation (IPCL). IPCL is eager to hear from U.S. experts:

Caustic Soda (NaOH) & Chlorine are produced from raw salt (NaCL) in our
Caustic-chlorine plant using membrane cell electrolysis process.

In the manufacturing process, brine sludge is generated.

1. Does the brine sludge contain Barium compunds?
2. In reference to the disposal method, what is practiced by industries and
what is recommended by the Law of the Land?

Thanking you,

N.S. Sivaraman
Indian Petrochemicals Corporation Limited