Chemical Exchange Programs ??

[gte622z]

I am looking to replace aqueous sodium hydroxide solution (20wt%) for waste water neutralization (of dilute organic acids) with an alkaline alternative (cost reduction initiative). I have considered lime slurry, but am a bit hesitant to travel down that road.

Does any one know where I can find alternative alkaline material through chemical exchange programs? I have searched the TCEQ "Renew" site without any success. Quantity needed =~1MM lb eq. NaOH/yr on a continuous basis.

http://www.zerowastenetwork.org/renewdev/index.cfm?Page=browsebytype&Type=A&ID=02

 

[orenda1168]

Have you considered magnesium hydroxide slurry as an alternative? Easier to control pH than lime slurries and less hazardous.

Orenda

 

[gte622z]

Yes. I have looked at lime slurry, magnesium hydroxide, and soda ash without much cost advantage.

Does anyone know what industries might produce an alkaline stream (electronics, petrochem, etc..)?

 

[786392]

Just a Wild Thought though.
Any possibilities to explore
Sodium Sufides or any organic sulfides(waste water stream's potential) utilization?

Best Regards
Qalander(Chem)

 

[ash9144]

I've seen this "initiative" in my career as well.

MgOH2 is a likely candidate. Since you've already ruled that out I won't express my opinions.

Another possibility is ammonium hydroxide. Sometimes the economics on it make it attractive. However the issue you have is disposal of the neutralized stream.

Also a word of caution on other sites waste streams. They usually have trace contaminants from their process so be very careful with going that route.