Are there any good methods to remove phosphites in amounts of several thousand?
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The total phosphorus content in the raw water is 3000 (almost phosphorus-free); the effect of electrochemical oxidation in removing this phosphorus is modest, with levels remaining around 900-1000. Do any experts have effective, low-cost methods for dealing with this issue?
High-volume cross-linked anionic resins can be used for adsorption, with the eluate being treated centrally.
The common methods for removing hypophosphorus involve converting it into orthophosphorus and then using chemical methods to remove it. However, oxidation methods are currently not very efficient and do not yield good results. You can look into phosphorus removers designed specifically for removing hypophosphorus; they are available on the market
Try the hydrogen peroxide + phosphorus-removing flocculant method