Filtering material for deep treatment of sewage

Abstract

A filtering material for deeply treating sewage by fixating P, removing N and active filtering by microbes is a granular one or a semi-finished cement clinker, which is prepared from the clay containing tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium ferroaluminate through sintering. Its advantages are high porosity, self-regeneration and high effect.

Description

technical field [0001] The present invention is used for the advanced treatment of sewage, reducing the soluble ammonia nitrogen, soluble phosphate, chroma, heavy metal ions, SS, COD, etc. in the effluent after treatment to meet the relevant national standards. A method that works well. It is suitable for the secondary or tertiary advanced treatment of urban sewage treatment devices that mainly use domestic sewage. In particular, the requirements for nitrogen and phosphorus indicators are relatively strict, and domestic organic wastewater discharged into rivers and lakes is treated. Background technique [0002] Aiming at the phenomenon that ammonia nitrogen and phosphate, which are common in domestic sewage treatment effluent, still exceed the standard, the existing advanced treatment measures are mainly supplemented by physical or chemical methods. The chemical method is to directly use certain chemicals for flocculation reaction to achieve the purpose of phosphorus and ...

AI Technical Summary

Problems solved by technology

But its biggest disadvantage is high operating cost and high management requirements

The physical method mainly uses the principle of physical filtration or exchange adsorption filtration, such as granular activated carbon, granular ceramics, granular resin and other materials. These materials have played a certain role in water treatment, but they have high processing costs. Or the function is single, especially for the removal of dissolved ammoniacal nitrogen, phosphate, chroma, and heavy metal ions, and the effluent is difficult to meet the corresponding national first-level standards or water quality standards

And backwashing and regeneration treatment must be carried out regularly, so the material cost and application cost are high, which affects its application to a certain extent

[0003] Chinese patent CN1084145A is to add rare earth radioactive waste slag when cement is manufactured, and use the radioactivity of the cement component made of this cement or the surface of the water treatment project to kill bacteria in the water and reduce CODcr, but for the sewage biological treatment technology widely used now In terms of the same, it will also kill the beneficial microbial flora, which is likely to be counterproductive