Method for chemically treating sludge and application

Abstract

The invention discloses a method for chemically treating sludge and application. The method comprises the following steps: placing sludge in a stirring tank, adjusting the water content to 20 to 99 percent, and obtaining sludge slurry; and adding a macromolecular binding material, a sludge improver and a functional additive into the sludge slurry A, mixing, stirring, introducing gas, and obtaininga sludge purificant. According to the requirements of an application field and an application objective, a porous solid product with excellent mechanical performance can be obtained by spraying, smearing, salivating, filling, and irrigating the sludge purificants, the product has no dissolved sludge and is unlikely to scatter, so that the product is convenient to store and transport and light andsanitary to use; and in addition, after being cured, the sludge purificants are porous, permeable, hydrophilic, capable of retaining water, and sufficient in nutrition, capable of providing a good root ecological environment to the plant and capable of promoting the harmless natural degradation of the sludge, before the treatment, the sludge does not need to be settled, filtered, calcined or buried, so that the problems of the traditional sludge treatment method that the energy consumption is large, the period is long, the cost is high, and the procedures are complicated and the like can be solved.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and in particular relates to a method for chemically treating sludge and an application thereof. Background technique [0002] The commonly used dredging methods for environmental water bodies such as rivers and lakes include draining and excavating, pumping and discharging, underwater digging, and twisting and dewatering. The above-mentioned dredging method has cumbersome steps and low efficiency, and the silt taken out is large in volume, and the thin silt is difficult to transport by ordinary trucks. If the transportation or stacking measures are improper, the surrounding soil will be polluted with the rainwater washing, causing secondary pollution of the water body and siltation. Various treatment technologies for sewage sludge also have problems such as low efficiency, limited daily treatment capacity, high equipment and operating costs, and limited dehydration effects. Its common treatment...

AI Technical Summary

Problems solved by technology

However, in the actual application process, the silt components in different places and different areas are not the same, so the collected silt of different batches needs to be continuously tested to obtain the corresponding amount of cementitious material, otherwise it is difficult to ensure the consistency of the cured mortar sex

Furthermore, after the sludge is made into solidified mortar, the solidification process still needs a long solidification time and careful solidification and maintenance, and the labor cost is relatively high.

Images