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Preparation method of denitrification and dephosphorization type filter material capable of quick start

A technology for nitrogen and phosphorus removal and fast start-up, which is applied in the field of preparation of nitrogen and phosphorus removal type filter materials, can solve the problems of low porosity and low cylinder compressive strength, and achieve high porosity, large cylinder compressive strength, and short start-up period short effect

Active Publication Date: 2021-04-23
WEIFANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent CN201410432978.5 discloses a method for preparing non-fired ceramsite by using waste mortar from concrete mixing station, using waste mortar from concrete mixing station, combining cement, fly ash, waste mortar powder, binder, pore forming agent and other components , using autoclaved technology to prepare unfired ceramsite, about 15~25% of the waste mortar powder can be reused, and the waste mortar is solid particles, which are only used as ordinary fillers in the process, and other components are combined with ordinary autoclaved aerated concrete The raw materials used in the block are basically the same, so the porosity is relatively low and the cylinder compressive strength is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the denitrification and phosphorus removal type filter material capable of quick start, the preparation steps include:

[0036] (1) Autoclaved aerated concrete block waste is crushed into spheres with a diameter of 5 mm, and sieved, and the upper sieve is retained as the core;

[0037] (2) Preparation of Thiobacillus denitrificans bacteria suspension: using Thiobacillus denitrificans freeze-dried powder as raw material, cultured on a constant temperature shaker at 30°C for 24 hours to prepare Thiobacillus denitrificans bacteria suspension;

[0038] (3) Soak the concrete block waste sieved in step (1) with the suspension of Thiobacillus denitrificans prepared in step (2), soak for 4 hours, and dry naturally;

[0039] (4) Preparation of premix: according to the weight percentage of the following raw material components: 50% cement, 20% heavy calcium powder; 10% sulfur; 12% lime, 8% gypsum, pulverized to below 0.1mm, passed through a 325 mesh siev...

Embodiment 2

[0043] The preparation method of the denitrification and phosphorus removal type filter material capable of quick start, the preparation steps include:

[0044] (1) Autoclaved aerated concrete block waste is crushed into spheres with a diameter of 4.5mm, and sieved, and the upper sieve is retained as the core;

[0045] (2) Preparation of Thiobacillus denitrificans bacteria suspension: using Thiobacillus denitrificans freeze-dried powder as raw material, cultured on a constant temperature shaker at 30°C for 24 hours to prepare Thiobacillus denitrificans bacteria suspension;

[0046] (3) Soak the concrete block waste sieved in step (1) with the suspension of Thiobacillus denitrificans prepared in step (2), soak for 4 hours, and dry naturally;

[0047] (4) Preparation of premix: according to the weight percentage of the following raw material components: 55% cement, 20% heavy calcium powder; 10% sulfur; 10% lime, 5% gypsum, pulverized to below 0.1mm, passed through a 325 mesh sie...

Embodiment 3

[0051] The preparation method of the denitrification and phosphorus removal type filter material capable of quick start, the preparation steps include:

[0052] (1) Autoclaved aerated concrete block waste is crushed into spheres with a diameter of 4mm, and sieved, and the upper sieve is retained as the core;

[0053] (2) Preparation of Thiobacillus denitrificans bacteria suspension: using Thiobacillus denitrificans freeze-dried powder as raw material, cultured on a constant temperature shaker at 30°C for 24 hours to prepare Thiobacillus denitrificans bacteria suspension;

[0054] (3) soak the concrete block waste sieved in step (1) with the suspension of Thiobacillus denitrificans prepared in step (2), soak for 4 hours, and dry naturally;

[0055] (4) Preparation of premix: according to the weight percentage of the following raw material components: 40% cement, 25% heavy calcium powder, 20% pyrite; 10% lime, 5% gypsum, crushed to less than 0.1mm, and passed through 325 mesh S...

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Abstract

The invention relates to the technical field of biological filter materials, in particular to a preparation method of a fast-starting denitrification and phosphorus removal type filter material. The preparation method of the fast-starting denitrification and phosphorus removal type filter material, the steps include: sieving concrete block waste; preparing Thiobacillus denitrification bacteria suspension, soaking the concrete block waste and drying naturally; , heavy calcium powder, pyrite, lime, and gypsum are crushed and sieved according to the weight percentage to obtain a premix; the concrete block waste ball is used as a core, and the premix is ​​used as an outer coating for granulation, and the core is Roll coating the premixed material to obtain raw material balls; autoclaving them to obtain a nitrogen and phosphorus removal type filter material that can start quickly. The invention provides a method for preparing a quick-start denitrification and dephosphorization type filter material, which effectively recycles the autoclaved aerated concrete block waste and makes a high value-added denitrification and dephosphorization filter material, The start-up period is short, the additional amount of carbon source is reduced, and it has high economic and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of biological filter materials, in particular to a preparation method of a fast-starting denitrification and phosphorus removal type filter material. Background technique [0002] Autoclaved aerated concrete block is a kind of porous concrete block made of fly ash, lime, cement, gypsum, slag, etc., through the process of batching, mixing, pouring, static stopping, cutting and high-pressure steam curing. Concrete products, in the process of concrete production, will produce about 1~3% waste, including defective products, leftovers, etc., a small part of which is mixed in mortar for reuse, and most of them are disposed of as construction waste, causing Great waste of resources. Autotrophic microbial denitrification technology for removing nitrate in water is a new type of biological denitrification technology, which means that under anoxic or anaerobic conditions, the related denitrification Thiobacillus deni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C02F3/34
CPCC02F3/345C02F2209/14C02F2209/18C04B28/14C04B7/02C04B14/28C04B22/064C04B14/36C04B7/32
Inventor 马海斌张运臣王林同
Owner WEIFANG UNIVERSITY
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