Method for manufacturing solid block by using sludge, solid block, and backfilling method

Abstract

The invention discloses a method for manufacturing a solid block by using sludge, the solid block, and a backfilling method. The method for manufacturing the solid block comprises the steps that: lime sludge is prepared by using sludge and lime; the lime sludge is mixed with cement, such that a material is obtained; and the material is manufactured into the solid block. The backfilling method comprises the steps that: slurry is prepared; the solid blocks and the slurry are filled into a void, such that the slurry is filled into the spaces among the solid blocks and between the solid blocks and the inner surface of the void. The slurry is foamed light soil slurry or concrete slurry. With the method for manufacturing solid blocks by using lime sludge and the backfilling method with the solid blocks, sludge is turned harmless, sludge amount is reduced, and sludge can be turned into a resource. Sludge is sufficiently prevented from polluting the environment, and secondary pollution is avoided. Sludge can be recovered and utilized. Also, problems such as atmospheric dust caused by backfilling by using sand and gravel are avoided.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a method for manufacturing a solid block from sludge, a solid block and a backfilling method. Background technique [0002] In the process of industrial development and national urbanization, there are inevitably industrial sludge and domestic sludge, river and lake sludge, such as the sludge generated when sewage treatment plants treat sewage, which has become a difficult problem to deal with. If these sludge are obtained If it is not treated effectively, it will cause environmental pollution and waste of resources. Existing sludge treatment methods include discharging sludge into water bodies, deep burying sludge, high-temperature composting of sludge, or using high-temperature sintering of sludge as building materials. However, discharging sludge into water bodies or burying sludge deeply will of course damage the environment, and burying sludge deeply will ...

AI Technical Summary

Problems solved by technology

However, discharging sludge into water bodies or burying sludge deeply will of course damage the environment, and burying sludge deeply will occupy land resources; composting sludge at high temperature can reduce harmful microorganisms but cannot avoid heavy metals and radioactive waste. And some organic pollutants destroy water and soil; the method of using high-temperature sintering will produce carcinogens and cause air pollution. Therefore, the existing methods will cause relatively large damage to the environment

Images