Preparation method of dephosphorization and denitrification type biological filter material and application of dephosphorization and denitrification type biological filter material to integrated treatment equipment for rural domestic sewage

A biological filter material and denitrification technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, anaerobic digestion treatment, etc. Reasonable ratio, enhanced market competitive advantage, low density effect

Active Publication Date: 2021-03-05
WEIFANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biological ceramsite-sulfur-alkali filter bed used in this method is mixed according to gradation, and the raw water passes through sequentially, which not only complicates the process equipment, but also increases the sewage treatment time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of the phosphorus and nitrogen removal type biological filter material and its application in the integrated rural domestic sewage treatment equipment are as follows:

[0041] (1) Use a crusher to crush the scraps of aerated concrete blocks to 0.8mm, and sieve them;

[0042] (2) Use a crusher to crush pyrite ore and other raw materials to 0.5mm, and sieve;

[0043] (3) Put the following components into the mixer according to the weight ratio and mix them: cement 16%, autoclaved aerated concrete crushed material 45%, fly ash 10%, pyrite powder 12%, lime 8%, gypsum powder 3 %, calcium bicarbonate 0.1%, the balance heavy calcium powder, and mix well;

[0044] (4) In the mixer, add a certain amount of water to the raw materials that have been mixed evenly in the mixer according to the mass ratio of 3:1 to the material mixed in step (3), and stir evenly, and use a granulator to prepare a pellet with a diameter of 8mm. raw material ball;

[0045] (5)...

Embodiment 2

[0048] The preparation method of the phosphorus and nitrogen removal type biological filter material and its application in the integrated rural domestic sewage treatment equipment are as follows:

[0049] (1) Use a crusher to crush the leftovers of aerated concrete blocks to less than 1mm, and sieve them;

[0050] (2) Use a crusher to crush the pyrrhotite ore to less than 0.6mm, and sieve it;

[0051] (3) Put the following components into the mixer according to the weight ratio and mix them: cement 18%, autoclaved aerated concrete crushed material 43%, fly ash 10%, pyrrhotite powder 10%, lime 9%, gypsum powder 3%, sodium bicarbonate 0.1%, the rest heavy calcium powder, and mix well;

[0052] (4) Granulation molding: Add water to the uniformly mixed raw materials in a mixer at a ratio of 2.5:1 by weight, and stir evenly, and use a granulator to prepare raw material balls with a diameter of 10mm;

[0053] (5) Send the raw meal balls into the autoclaved aerated concrete block cu...

Embodiment 3

[0056] The preparation method of the phosphorus and nitrogen removal type biological filter material and its application in the integrated rural domestic sewage treatment equipment are as follows:

[0057] (1) Use a crusher to crush the leftovers of aerated concrete blocks to below 325 mesh and sieve them;

[0058] (2) Use a crusher to crush pyrrhotite ore to below 325 mesh, and sieve;

[0059] (3) Put the following components into the mixer according to the weight ratio and mix them: cement 15%, autoclaved aerated concrete crushed material 46%, fly ash 10%, pyrrhotite powder 8%, lime 8%, gypsum powder 5%, sodium bicarbonate 0.15%, the rest heavy calcium powder, and mix well;

[0060] (4) Granulation molding: In the mixer, add water to the uniformly mixed raw materials according to the mass ratio of 3:1, and stir evenly, and use the granulator to prepare raw meal balls with a diameter of 7mm;

[0061] (5) Send the raw meal balls into the autoclaved aerated concrete block cur...

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a preparation method of a dephosphorization and denitrification type biological filter material and application of the dephosphorization and denitrification type biological filter material to integrated treatment equipment for rural domestic sewage. The method comprises the following steps: (1) crushing and sievingautoclaved aerated concrete block leftovers; (2) crushing and sieving sulfur-containing iron ore and other raw materials; (3) mixing the following components in percentage by weight: 15-25% of cement,40-50% of a crushed autoclaved aerated concrete material, 10-15% of fly ash, 10-16% of sulfur-containing iron ore powder, 5-10% of lime, 3-5% of gypsum powder, 5-8% of heavy calcium carbonate powderand 0.1-0.15% of a pore forming agent; (4) preparing raw material balls by using a granulator; and (5) conducting autoclaved curing. The biological filter material is used in the integrated treatmentequipment for rural domestic sewage, especially in an anaerobic filter. According to the method, the autoclaved aerated concrete leftovers are recycled and made into the dephosphorization and denitrification type biological filter material, so the dephosphorization and denitrification effect of the integrated treatment equipment for rural domestic sewage is enhanced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for preparing a phosphorus-removing and nitrogen-removing biological filter material and its application to integrated rural domestic sewage treatment equipment. Background technique [0002] With the increasing development of my country's economy, the problem of eutrophication caused by a large number of pollutants, especially nitrogen and phosphorus in the water body, is becoming more and more serious. In rural areas of our country, a large number of integrated equipment is currently used to treat rural domestic sewage. [0003] At present, the methods widely used to remove ammonia nitrogen in domestic sewage mainly include biological contact oxidation, biological aerated filter, biological activated carbon, etc. The main principle is to use biofilm adsorption and oxidation to convert ammonia nitrogen into nitrate or nitrous acid Salt, to achieve the purpose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B38/08C04B38/02C02F3/28C02F101/10C02F101/16C04B18/16
CPCC02F3/2806C02F2101/105C02F2101/16C04B28/144C04B2201/50C04B7/02C04B14/28C04B18/16C04B18/08C04B22/064C04B22/106C04B14/36C04B40/024C04B38/08C04B38/02C04B38/0074Y02W30/91
Inventor 马海斌张运臣王林同王会勤
Owner WEIFANG UNIVERSITY
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