I, like others, suggest that ...

I, like others, suggest that you look at identifying the cause of the sulphide in the treated effluent. It is most likely something to do with the process operating programme. Then when you have identified the cause, apply a corrective action to the operating programme rather than adding more treatment at the end of the line.

An increase in ORP in the Biological Section could be very effective.

Regards

Tom Keenan