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Surface waters typically have high levels of natural organic matter. The reaction of this organics with chlorine, which is generally used for disinfection, results in the formation of carcinogenic chlorine disinfection by-products (DBPs). Water treatment plants are obliged to come up with appropriate solutions to meet the set guidelines on maximum acceptable levels for these harmful DBPs.
Different approaches to reduce DBPs have been employed to this day such as enhancing removal of organics in the first steps of treatment, use of disinfectants alternative to chlorine, or removal of DBPs after they have been formed.
The Herbert WTP applies coagulation/flocculation/sedimentation processes followed by a reverse osmosis (RO) membrane. This WTP is facing operational challenges related to inadequate organic removal within the pretreatment steps. Historically high levels of THMs have been the primary challenge, which had necessitated the upgrades but with the requirements to blend water, the benefits of organic reduction in order to extend membrane lifespan is the primary drive for this research. […]
Engineering - civil
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