Ferrous sulfate as a flocculant : The most widely used use of ferrous sulfate is as a flocculant. As a flocculant, it has the following advantages: fast settling speed, large sludge particles, small and dense sludge volume, good decolorization effect (very suitable As a treatment of textile wastewater such as printing and dyeing, washing, etc.), non-toxic and beneficial organism growth (very suitable for use in sewage treatment systems with subsequent biochemical treatment processes ), without changing the original process, low price, as a flocculant, ferrous sulfate can Instead of polyaluminum , basic aluminum chloride, polyiron , aluminum sulfate , ferric chloride, etc.

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