Research on Neutral Cleaning Agent for Reverse Osmosis Membrane
Taking the reverse osmosis membrane element blocked by sewage in the reclaimed water reuse system in Angang Plant as an example,the EDS assisted double membrane pool diaphragm test device was used to realize the rapid screening research of the special cleaning agent for reverse osmosis membrane,and a green and efficient neutral water based cleaning agent was successfully developed.The formula was optimized by orthogonal experiment,the cleaning effect was discussed,and the cleaning agent recommended by membrane manufacturer was compared.The results showed that the best composition(mass fraction)of the self-made cleaning agent was 1.5%triammonium citrate,0.15%HEDP,0.15%FMEE,0.3%OP-10,0.3%FMES,0.01%HPMC,and the remaining amount was water.After soaking the polluted film at 30℃for 8 h,the film flux recovery rate was up to 99%,which was much higher than the cleaning agent recommended by the film manufacturer,having a broad application prospect.
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