A preparation method of sludge biochar permeable brick with high adsorption performance

Abstract

The invention relates to a preparation method of a sludge biocharcoal water permeable brick with high adsorption performance, which can effectively solve the problems of the conventional building brick produced by sludge that the sludge content of the single brick is low, the sludge utilization rate is low, and the strength of the brick produced independently by sludge or sludge biochaircoal is insufficient. According to a technical scheme, the preparation method comprises the following steps: after dewatered sludge is rinsed to remove partial heavy metal, the dewatered sludge is press filtered by virtue of a plate frame, then coal ash or blast furnace slag is added and uniformly mixed, after being granulated and dried, the mixture is pyrolysed at a high temperature to obtain the sludge biocharcoal, crushed stone aggregates are mixed with processed waste fabric, the stirred concrete and the biocharcoal are loaded into a mold together and then pressurized, molded, demolded and maintained, thus obtaining the sludge biocharchaol water permeable brick. The biochaircoal water permeable brick prepared by the method of the invention can prevent heavy metal nitrogen, phosphorus, organic pollutants and the like in direct surface runoff from being migrated into underground water and from polluting the underground water, and the method is an innovation for synergistic treatment and recycling of waste.

Description

technical field

[0001] The invention relates to the technical field of preparation of permeable bricks, in particular to a method for preparing sludge biochar permeable bricks with high adsorption performance. Background technique

[0002] The amount of sludge produced by my country's sewage treatment plants is about 30 million tons per day, and a large amount of sludge will also be produced during the treatment of black and odorous water bodies. Because of its high water content and high heavy metal content, its safe disposal is a huge problem .

[0003] Biochar is a product of biomass pyrolysis under high temperature conditions. It has a porous structure and a stable carbon source with specific functional groups. It has a strong adsorption capacity for most pollutants. It is generally used as an adsorbent, sewage treatment and soil remediation material.

[0004] Permeable brick is a commonly used material in the process of black and odorous water treatment and sponge city ...

Images