Method for preparing ceramsite with catalyzing function through surplus sludge

Abstract

The invention discloses a method for preparing ceramsite with a catalyzing function through surplus sludge. According to the method, through different portions of the surplus sludge, coal ash and slag, a little of SiO2 and a little of Al2O3 are added to improve the performance of the ceramsite, and the prepared ceramsite has the catalyzing function through the load of reactive metal. By the adoption of the method, the prepared ceramsite is high in compressive strength and good in all performance, has the catalyzing function and serves as packing of an oxidation pond to treat printing and dyeing wastewater, so that a good effect is achieved, and biofilm formation is easy.

Description

technical field

[0001] The invention belongs to the technical field of solid waste recycling for environmental protection, and in particular relates to a method for preparing ceramsite with catalytic function by using surplus sludge. Background technique

[0002] The technology of preparing ceramsite from excess sludge is a way of resource utilization of excess sludge. It not only solves the pollution problem of excess sludge, but also can turn waste into wealth and receive certain economic benefits. Ceramsite is widely used in construction materials and water treatment. The invention uses residual sludge, fly ash, slag and special additives as raw materials to prepare ceramsite, and uses it as filler to treat printing and dyeing wastewater, and achieves a certain treatment effect. This technology is also an effective solidification and stabilization method that encourages heavy metals. After high-temperature sintering, heavy metals are stably fixed inside the ceramsite wi...

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