After the sludge is dried by the sludge dryer, its uses become diversified. The following are some main application directions:
Utilization of farmland and forestry land: Waste sludge contains trace elements and fertilizers needed for plant growth. After reasonable treatment, it can be used as soil conditioner or chemical fertilizer. It is a valuable resource for farmland and forestry land.Brick making: The dried sludge is added to the clay in a certain proportion. Its compressive strength is equivalent to that of ordinary red bricks and it has a certain calorific value. During the brick making process, it will self-ignite and increase heat, saving fuel consumption.
Cement plant admixture: The dried sludge can also be used as an admixture in cement plant production.Production of biochemical plywood: Enzymes and organic matter in activated waste sludge can be dissolved in water, and through drying, heating and pressure treatment, protein glue can be made, which can be further combined with degreased and bleached waste fibers to make boards.In addition, there are other specific uses depending on the source and characteristics of the sludge. For example, some organic chemical sludge contains trace elements such as nitrogen, phosphorus, and potassium, which are very suitable for use as fertilizers. However, not all sludge is suitable for composting, such as printing factory sludge and tannery sludge.
In addition, the incineration products of sludge can also be utilized, and their calorific value can be mixed with coal and burned in the boiler to reduce fuel costs.
