Dear Atiq Rehman, It seems ...
Published by Bruno Peeters, managing director at Model Engineering
Dear Atiq Rehman,
It seems that your alkaline wastewater requiring hydrochloric acid (HCl) to neutralize the pH originates from a food or beverage industry using sodium hydroxide (NaOH) for cleaning-in-place (CIP). For this kind of wastewater we apply biological acidification (without adding acid) successfully over the last 40+ years.
In addition, we recommend food & beverage industries to recover and store the spent NaOH from CIP for downstream pH correction of the wastewater if/as needed.
If interested I can advise in more detail via email.
Kind regards,
Bruno Peeters