Greetings everyone,
I would like to ask for some guidelines/useful information:
I am a graduate trainee in a chemical distribution company, apart from making sodium hypochlorite (NaClO) we do a lot of mixing and blending of acids,bases. The plant is divided into 2 sections i.e. The Acid-Alkali and Solvents section. The liquid waste is generated from these 2 sections. The municipality requirements require that the following water quality parameters be not violated with the liquid discharge from the plant:
1. PH range: 5.5-12.0
2. Conductivity should not exceed 500mS/m
3. Both Chlorides and Sulphates should not exceed 1500mg/L
4. COD : 5000mg/L
The only treatment currently is PH correction with Acid or base (Caustic Soda). Sometimes the operator combines the waste (organic) from solvents section in attempt to neutralize the PH before using Acid/Base. The only thing measured in the lab is the PH and conductivity, the rest they get fined for it whenever it exceeds the limits. What would be the effective way to deal with concentration of sulphates,chlorides and possibly keep the COD within the limits as well.
Please may you give me any information/thoughts and advices that will be useful to me
Molefe.