The invention discloses a multi-stage oxidization treatment technology for
sludge. The multi-stage oxidization treatment technology comprises the following steps: (1) feeding the
sludge into an adjustment basin, and adding water for
dilution; (2) feeding the diluted
sludge into all stages of oxidization reaction basins in sequence for multi-stage oxidization reaction; (3) feeding the sludge subjected to oxidization reaction into a
settling basin, and leaving to stand for layering to form
dross, supernate and sediments; (4) performing pressure filtering and
dewatering on the
dross and the sediments to prepare sludge cakes, and returning the supernate into a water
plant. According to the multi-stage oxidization treatment technology, walls of cells can be broken, so that microorganisms and germs in the sludge can be effectively subjected to wall breakage, and thus water in the cells can be released, and
dewatering is facilitated; after the sludge is made into the sludge cakes, the
moisture content is reduced to about 55 percent, so that the weight of the sludge cakes is greatly reduced, and the
delivery cost of the sludge cakes is reduced; moreover, a complex group in the sludge can be opened, and macromolecular organic matters can be effectively decomposed and bonds of which can be broken, so that the biodegradability is obviously improved; non-toxic and harmless gas such as
carbon dioxide and
nitrogen is released, and the multi-stage oxidization treatment technology is clean and environment-friendly.