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Straw puffed biological matrix material with sandwich type framework, and preparation method and application thereof

A sandwich-type, bio-matrix technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of low resource utilization rate of rice straw biomass waste and complex adsorbent preparation process , Difficulty in maintenance and recovery, etc., to achieve the effect of wide source of raw materials, enhancement of market application value, easy solid-liquid separation and recovery

Active Publication Date: 2020-02-21
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a straw puffed bio-matrix material with a sandwich frame and a preparation method thereof, so as to solve the problems of complex preparation process and high cost of existing adsorbents, and the need to add chemical modifiers It is easy to cause secondary pollution, difficult to maintain and recycle in the later stage, and also solves the problems of low utilization rate of straw biomass waste and environmental pollution

Method used

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  • Straw puffed biological matrix material with sandwich type framework, and preparation method and application thereof
  • Straw puffed biological matrix material with sandwich type framework, and preparation method and application thereof

Examples

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Embodiment 1

[0028] A kind of preparation method of the rice straw puffed bio-matrix material of sandwich frame, comprises the following steps:

[0029] 1) Pretreatment: Naturally dry the rice straw to a moisture content of 10%, then cut it into small sections to obtain crushed rice straw with an average particle size of 18 mm in length and 7.5 mm in width.

[0030] 2) Matrix cushion and matrix filler processing: take 100g of crushed rice straw prepared in step 1) and mix evenly with 20g of guar gum to obtain a mixed material, which is used to prepare matrix cushion and matrix filler;

[0031] Put the mixed material into a mold (a built-in hollow cylinder with a height of 2mm and a radius of 10cm), press the mixed material into a cake shape, dry it at 60°C for 30 minutes and harden it to form a matrix cushion; take the After the mixed material is dried at 50°C for 20 minutes, it is put into a mixer and stirred to form a large number of small lumps with a certain viscosity, which is the mat...

Embodiment 2

[0036] A kind of preparation method of the rice straw puffed bio-matrix material of sandwich frame, comprises the following steps:

[0037] 1) Pretreatment: Naturally dry the rice straw to a water content of 8%, and then cut it into small pieces to obtain crushed rice straw with an average particle size of 18 mm in length and 8 mm in width.

[0038] 2) Matrix cushion and matrix filler processing: take 118g of crushed rice straw prepared in step 1) and 25g of guar gum and mix evenly to obtain a mixed material, which is used to prepare matrix cushion and matrix filler;

[0039] Put the mixed material into a mold (a built-in hollow cylinder with a height of 2mm and a radius of 10cm), press the mixed material into a cake shape, dry it at 60°C for 30 minutes and harden it to form a matrix cushion; take the After the mixed material is dried at 48°C for 20 minutes, it is put into a mixer and stirred to form a large number of small lumps with a certain viscosity, which is the matrix f...

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Abstract

The invention discloses a straw puffed biological matrix material with a sandwich type framework, and a preparation method and an application thereof. The straw puffed biological matrix material comprises matrix cushion layers and a matrix filler, wherein the matrix cushion layers comprise an upper matrix cushion layer, a middle matrix cushion layer and a lower matrix cushion layer; the matrix filler is filled between adjacent matrix cushion layers to form a pre-finished product with a sandwich structure; the matrix cushion layers and the matrix filler are prepared by compounding of rice strawand an adhesive; and the outer layer of the pre-finished product with the sandwich structure is subjected to enveloping treatment by using the matrix cushion layers to be integrally formed. Accordingto the invention, the sandwich type framework prepared from the straw puffed matrix material increases the porosity and specific surface area of a puffed biological matrix, has good adsorbability topollutants like COD, nitrogen and phosphorus in sewage, increases the stability and mechanical strength of a puffed biological matrix, solves problems like expansion and dispersed suspension of the puffed biological matrix in water, and is easy to be recovered. The straw puffed biological matrix material provided by the invention has the following advantages: the preparation method is simple; energy consumption is low; raw materials are simple and easily-available; a material obtained after sewage treatment can be utilized for the second time; and good application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sandwich frame straw puffed biological matrix material and its preparation method and application. Background technique [0002] The scale of rice production and animal husbandry in China ranks among the top in the world. Rice planting provides guarantee for China's food security, but also brings about the problem of straw disposal. Traditionally, rice straws are processed mainly through papermaking, biomass power generation, and straw foam boards. These processing routes rely on large-scale industrial production. However, China's unique agricultural model where one household is the main body restricts the intensive operation of rice planting and increases the cost and application scale of the above-mentioned rice straw treatment. Rice straws are returned to the field on the spot, which is conducive to maintaining the fertility of the farmland soil. However, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/16
CPCB01J20/24B01J20/28014C02F1/286B01J2220/4825C02F2101/16Y02W10/10
Inventor 周脚根
Owner HUAIYIN TEACHERS COLLEGE
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