The invention discloses a cyclic regeneration method of a town
sewage treatment medicament, and the cyclic regeneration method comprises the following steps of: (1) calcining the town
sludge, and then smashing into absolute dry aluminum ash:; (2) adding water and concentrated
sulfuric acid to the absolute dry aluminum ash for sufficient mixed reaction; (3) adding a flocculant to a mixed
reaction system obtained from the last step for
flocculation, and then carrying out filter pressing to obtain filter liquor and a
filter cake; (4) washing the
filter cake, and merging the filter liquor obtained after washing and the filter liquor obtained from the last step; and (5) adding a heavy
metal collecting agent to the merged filter liquor obtained from the last step to remove
heavy metals contained in the filter liquor, sufficiently standing, and regulating the aluminum content of an obtained supernatant to obtain liquid industrial aluminum
sulfate with aluminum
oxide content more than or equal to 7.8 percent by weight. The cyclically regenerated town
sewage treatment medicament is applied to
sewage disposal; the cyclic regeneration method disclosed by the invention can be used for preparing the liquid aluminum
sulfate with industrial application value through a simple process by taking the town
sludge as a
raw material; and the process is environmental-friendly without generating secondary pollutants and accords with the national
sustainable development strategy.