Magnetic seed filler taking sludge as main raw material and preparation method thereof

Abstract

The invention discloses magnetic seed filler taking sludge as a main raw material and a preparation method thereof. The magnetic seed filler is bacteria filter magnetic seed filler prepared by using the sludge, waste iron residues, a small quantity of magnetic powder, shale, clay and a minute quantity of starch or bone meal as raw materials through ball milling, granulation, roasting, magnetizingand starch or bone meal conglutination. The invention has the advantages of good environmental protection property, stable chemical and physical property, high intensity, good abrasion resistance, difficult crushing, high void ratio and microorganism adhesive ability, good film formation property, high pollution catching capacity, easy back wash, low manufacturing cost, and the like.

Description

technical field [0001] The invention relates to a microbial carrier (biological filler) for sewage treatment, in particular to a magnetic seed filler with sludge as the main raw material used as a biological aerated filter filler and a preparation method thereof. Background technique [0002] The biological aerated filter process is a deformation form of the ordinary biological filter, and can also be regarded as a special form of the biological contact oxidation method. Shaped filter material, the surface of the filter material is attached to grow biofilm, and the inside of the filter is aerated. When the sewage flows through, the pollutants, dissolved oxygen and other substances first diffuse to the surface and inside of the biofilm through the liquid phase, and the sewage is quickly purified by using the strong oxidative degradation ability of the high-concentration biofilm on the filter material. This is a biological oxidation degradation process. At the same time, beca...

AI Technical Summary

Problems solved by technology

[0003] At present, my country's biological aerated filter mainly adopts fiberglass, plastic honeycomb filler, soft fiber filler, semi-soft filler and irregular filler, etc., glass fiber reinforced plastic and plastic honeycomb filler have smooth surface, poor biofilm adhesion, easy aging, and Packing plugging occurs; soft packing, semi-soft packing, the water flow state is not ideal, it is easy to bond with the biofilm, resulting in a ball phenomenon, thereby reducing the surface area, generating anaerobic effect inside, affecting the treatment effect

Irregular packing, large water flow resistance, easy to block, poor strength, easy to break, not resistant to water erosion

[0004] Due to the large specific surface area, porosity and large biomass of ceramsite in the inorganic filter material, the load of the filter tank is large and the head loss is small. At present, there are many researches on it in China, but most of them are made of clay or fly ash. The main raw material, and the effect of nitrogen and phosphorus removal is not ideal, it is difficult to meet the relevant requirements of the current sewage treatment

And the use of clay to make ceramsite filler is a process that consumes high clay resources, and the coordination of the ecological environment is poor, which brings a heavy burden to ecological balance and environmental protection. It is a non-environmental protection industry, so it is of great importance to study other materials to produce fillers significance