Porous phosphorus removing ceramic granules with function of slowly releasing alkali and preparation method thereof

Abstract

The invention discloses porous phosphorus removing ceramic granules with a function of slowly releasing an alkali and a preparation method thereof. The prepared ceramic granules are an environmental material for efficiently removing phosphorus from municipal sewage and industrial wastewater. Based on the basic chemical properties of the phosphorus in water and a phosphorus removing mechanism by chemical absorption, the preparation method of the ceramic granules comprises the following steps of: mixing 20 to 40 mass percent of ordinary portland cement (42.5 level), 10 to 20 mass percent of bentonite, 10 to 20 mass percent of fly ash, 10 to 15 mass percent of calcium oxide, 15 to 25 mass percent of nitrocellulose, 14 to 30 mass percent of xonotlite fiber particle and 0.1 to 0.5 mass percentof pore-creating agent; adding water for stirring the mixture according to a water-solid ratio of 0.35 to 0.45; granulating the mixture into granules with required grain sizes; and after the granulesare foamed and solidified, curing the granules by using high-temperature steam to obtain the ceramic granules. The method has the advantages of simple preparation process, readily available raw materials, low cost and wide application prospect in the field of the removing of the phosphorus in water bodies. The prepared ceramic granules have the characteristics of capacity of slowly releasing the alkalis, silicic and calcareous textures, porosity, capacity of continuously and efficiently absorbing and removing the phosphorus and suitability for phosphorus removing systems of the municipal sewage and the industrial wastewater.

Description

technical field [0001] The invention relates to a porous ceramsite filter material capable of chemisorbing phosphate in water bodies and a manufacturing method thereof, more specifically, a porous ceramsite filter material capable of chemically adsorbing and degrading phosphate in water bodies and its preparation method. The preparation method is suitable for phosphorus removal systems of municipal sewage and industrial wastewater, and belongs to the technical field of environmental engineering water treatment. technical background [0002] With the eutrophication of water body highlighted, the discharge of phosphorus in sewage has received more and more attention. At present, the sewage treatment system is still unable to eliminate and compensate for the strong disturbance of nitrogen and phosphorus in the natural process by human activities, and the existing sewage system will still cause some nitrogen and phosphorus to eventually be lost in the water environment. To effe...

AI Technical Summary

Problems solved by technology

At present, chemical adsorption phosphorus removal technology mainly focuses on the development of adsorbents, but there are many problems in anti-interference, adsorption capacity and operation replacement cost of phosphorus removal adsorbents, and large-scale engineering applications are still lacking.