Forsterite bio-filter material for sewage treatment and preparation method of forsterite bio-filter material

Abstract

The invention particularly relates to a forsterite bio-filter material for sewage treatment and a preparation method of the forsterite bio-filter material. The technical scheme is as follows: the preparation method comprises the following step: uniformly mixing 45-55wt% of forsterite raw ore fine powder, 20-30wt% of talc fine powder, 15-25wt% of magnesium oxide fine powder and 2-6wt% of dravite micropowder as raw materials with additional 2-6wt% of starch to prepare a mixed material; then, putting the mixed material and polystyrene balls in a pelletizer in a volume ratio of the polystyrene balls and the mixed material of (1.5-2.0) to 1; then, adding 10-20wt% of water to prepare particles with the grain size being 5-13mm; and then, roasting the prepared particles for 16-24 hours at 110-150 DEG C, and sintering for 2-4 hours at 1300-1500 DEG C to prepare the forsterite bio-filter material for sewage treatment. The forsterite bio-filter material for sewage treatment is simple in process and wide in source of raw materials and the prepared forsterite bio-filter material for sewage treatment has the characteristics of good flora biofilm culturing effect, high flora survival rate, good decoloring effect and high strength.

Description

Technical field [0001] The present invention is a biological filtering technology field for sewage treatment.Specifically involved a magnesium olive filter material and preparation method for sewage treatment. Background technique [0002] With the increasing attention of people's attention to environmental issues, how to effectively handle industrial sewage and domestic sewage has become a hot research issue.As a new type of sewage treatment technology: fill a certain amount of particle -shaped filter material with a small amount of particle size in the filter, the surface of the filter material grows the biofilm, the aeration inside the filter, and when the sewage flows through, the filter is used, and the filter is used.The high -concentration biofilm voltage and degradation capacity of the high concentration of biofilms is rapidly purified. At the same time, due to the flow of sewage, the filter material is compacted.A large amount of suspension in the sewage is cut, and the ...

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Problems solved by technology

For example, the patented technology of "biological ceramsite filter material for flotation tailings of lead-zinc sulfide ore and its preparation method" (CN 103086741 A), which uses flotation tailings of lead-zinc sulfide ore and clay as raw materials, plus pore-forming agent And binder, through the disc to make 5 ~ 10mm raw meal balls, fired at 1240 ℃ for 30 minutes, to obtain lead-zinc ore flotation tailings biological ceramsite filter material, this technology has the following disadvantages: (1) The biological filter material only has the film-hanging effect of the bacterial flora, but the survival rate of the bacterial flora is not high; (2) the color removal effect of the high biological filter material is not good

Another example is the patented technology of "a multi-media biological filter material and its preparation method" (CN 102718466 A). This technology uses modified montmorillonite, activated carbon, and magnesium tourmaline as the main raw materials. After firing, the multi-media biological filter material can be prepared, but this technology has the following disadvantages: (1) the active montmorillonite must be processed first, and the process is complicated; (2) the strength of the prepared biological filter material is not high, Easily broken during the backwashing process of the biological aerated filter