... : as the most extensive use of ferrous sulfate is a flocculant as flocculant, it has the following advantages: sedimentation speed and sludge ... ), don't change the original technology, low price, as the flocculant, ferrous sulfate could replace polyaluminium, alkali, polyblend of iron and ... and improve the system efficiency and stability. Fourth, as a flocculant used method 1 made use of the PH: 8-11 ...