I am currently working on wastewater treatment facility design and my question is, apart from using chemical cogulant and aeration method, how can I use ion exchange method to reduce the level of BOD and COD in wastewater before UF and RO unit.
Basic pollutant portion removed by ion exchange is inorganic (so no effect on BOD). However, some cases ion exchange resins can remove dissolved TOC (total organic carbon).
So as a tertiary treatment in wastewater there is a possibility to use iron exchange resins to remove dissolved TOC (hence reduce the THM formation in chlorination process (which will add risk to living things in discharging environment).
TOC is typically negatively charged and removed by using SBA (strong base/strong anion) resin.
This reduction of dissolved TOC (dissolved organic carbon) will reduce the BOD and COD in wastewater.
In your case if you need to use it before UF or RO (in this case I assume RO and UF are tertiary treatment with the objective of reuse), then based thing is to apply SBA resin before to the effluent from secondary treatment. However, you must be careful about the effluent quality which will limit (or govern) the regeneration time of the resin.
Amila Abeynayaka thank you for the description, where can I get a detailed study of the same?
I forgot another point, Cation exchange resins used in DOM (dissolved organic matter) analyses, reading those methods could also be useful.
good luck for your research.
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