Why does the sulfite content in the closed-loop water system decrease slowly after each addition?
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Each time, the concentration of yao*ao acid salts is increased to around 320 ppm; after one week, it is reduced to around 240 ppm. The TBC value remains at approximately 5000–6000! Fungicides were also added to eliminate the fungi, but it was still impossible to eradicate this problem! Please, everyone, help me out! Thank you! The water quality has a pH of around 8.5–9.2, with all other parameters being normal!
Check if there is any sludge in the system Are the fungicides oxidative or non-oxidative? :)
The fungicide uses a non-oxygen compound! Thank you! The pipeline has been opened before! The pipe wall is clean! The turbidity at operation is also very low, around 1-3
A such significant decrease after one week is likely due to the presence of some oxygen in the enclosed environment; along with high temperatures, over time the hypo*ao acid roots get oxidized into *ao acid roots! It is recommended to completely eliminate them by using an appropriate non-oxidizing bactericide. At the same time, a certain concentration of reducing agents such as sodium sulfite is added to eliminate the effect of oxygen :)