Carbon dioxide mineralization maintenance method for dredging sediment of rivers and lakes

The invention provides a carbon dioxide mineralization maintenance method for river and lake dredging bottom mud. The method comprises the following steps: preparing a curing agent; preparing solidified sludge; permeable template cloth is laid on the outer side of the first mold template; pouring solidified sludge with the moisture content of more than 60% into the first mold; a plurality of first molds loaded with solidified sludge with the moisture content larger than 60% are sequentially installed in the support from bottom to top at intervals; the support is placed in a closed curing space for carbon dioxide mineralization curing; pouring the solidified sludge with the water content of less than or equal to 60% into a second mold, and compacting the solidified sludge in the second mold through a press machine to form a porous sludge building block; and the second mold is conveyed into a closed curing space for carbon dioxide mineralization curing. The pH value of the sludge can be effectively neutralized,