The invention provides a plug-flow type
bioleaching treatment process for
sludge treatment and equipment thereof. The equipment comprises a
sludge regulating reservoir, an activating tank, a plug-flow type
bioleaching reactor, an
advection type
sludge concentrated tank, a heavy
metal recovery pond and other facilities, an
aeration device, a heating device, a
dehydration device, a stirring device and other devices. The process comprises the following steps that: a sludge
system is acidified by a composite bacterium consisting of a
thiobacillus and an acid resistant heterotrophic bacterium under conditions of aerobism and existence of
sulfur powder and other composite nutriments, heavy
metal in the sludge is massively dissolved in
liquid phase, the sludge is regulated at the same time so as to facilitate
sedimentation and
dehydration; the sludge stays in the reactor for 2 to 4 days; discharged treated sludge enters the concentrated tank to be subjected to gravity thickening; 20 to 50 percent of concentrated
bioleaching sludge flows back to the reactor, and the rest sludge is subjected to chamber
filtration and
dehydration without adding any flocculating agent until the water ratio is below 60 percent; and the heavy
metal in the water is recycled by an alkali
precipitation method. The method can remove massive
heavy metals of the sludge, has over 99 percent of sludge
pathogen kill ratio, and ensures that the treated sludge does not have malodor and is in khaki color, thereby realizing the aims of innoxiousness and minimization of the sludge.