Re: Waste water neutralization-pH

Dear Tomo:

On Mar 24, 11:27 am, "Tomo" <popa...@xxxxxxxxx> wrote:
Hi, I came across one article relating pH control of waste
water. It's batch neutralization (pharmaceutical waste
waters, from different types of API).

It says:

1. bring pH to 14 (with 20% NaOH)
2. heat the Reactor (for neutralization) to 80 °C for 30
minunets
3. cool it to 40 °C
4. adjust pH to 5,5-9,5 (20% HCl)

My first question is: why do we increase pH to 14 and
heat the system up ?

I would guess 1.) "saponification" and / or "denaturing proteins" and
2.) "sterilization" and / or "increasing reaction rate" respectively.
I will be interested in what someone with experience will say.

David A. Smith
.

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