Protein flocculant and preparation method thereof

A flocculant and protein technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve problems such as inapplicability, achieve strong flocculation ability and good application prospects

Active Publication Date: 2021-02-12
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses a large amount of organic reagents such as acrylamide, formaldehyde, and dimethylamine. Because the chemically modified collagen usually has certain chemical toxicity, it is not suitable for the food field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Example 1. A preparation method of a protein flocculant, the preparation steps are as follows:

[0026](1) Wash the bighead carp fish bones and cut into sections until the length does not exceed 4cm, and then cut the fish bones into sections;

[0027](2) According to the mass ratio of the cut fish bones to the hydrochloric acid solution of 1:6, soak the cut fish bones with 0.02 mol / L hydrochloric acid solution for 10 minutes, and then take them out to obtain acid-soaked fish bones;

[0028](3) Maintain the acid-soaked fish bones obtained in step (2) in 1.0Mpa saturated steam for 2 minutes, and perform steam explosion treatment to obtain steam explosion fish bones;

[0029](4) Mix the steam-exploded fish bones obtained in step (3) with water at a mass ratio of 1:3, 10000rpm, beating for 2min, stirring at 60℃ (stirring speed 200rpm), extracting for 60min, standing for 60min, and filtering The filtrate is conventionally spray-dried (inlet air temperature is 185°C, outlet air temperature is 9...

Embodiment 2

[0031]Example 2. A preparation method of a protein flocculant, the preparation steps are as follows:

[0032](1) Wash the tilapia fish bones and cut into sections until the length does not exceed 4 cm, and then cut the fish bones into sections;

[0033](2) According to the mass ratio of the fish bones to the hydrochloric acid solution of 1:6, soak the fish bones with 0.04 mol / L hydrochloric acid for 5 minutes and take them out to obtain acid-soaked fish bones;

[0034](3) Maintain the acid-immersed fish bones obtained in step (2) in 0.8MPa saturated steam for 5 minutes, and perform steam explosion treatment to obtain steam explosion fish bones;

[0035](4) Mix the steam-exploded fish bones obtained in step (3) with water in a mass ratio of 1:2, 10000rpm, beating for 2min, stirring at 60℃ (stirring speed 200rpm), extracting for 90min, standing for 60min, filtering , Drying (60°C for 8 hours) to obtain protein flocculant.

[0036]The flocculation efficiency of the protein flocculant was determined t...

Embodiment 3

[0037]Example 3. A method for preparing a protein flocculant, the preparation steps are as follows:

[0038](1) Wash the silver carp fish bones and cut into sections until the length does not exceed 4 cm, and then cut the fish bones into sections;

[0039](2) According to the mass ratio of the cut fish bones to the hydrochloric acid solution of 1:8, soak the cut fish bones with 0.03mol / L hydrochloric acid for 10 minutes and take them out to obtain acid-soaked fish bones;

[0040](3) Maintain the acid-soaked fish bones obtained in step (2) in 1.0 MPa saturated steam for 4 minutes, and perform steam explosion treatment to obtain steam explosion fish bones;

[0041](4) Mix the steam-exploded fish bones obtained in step (3) with water in a mass ratio of 1:3, 12000rpm, beating for 2min, stirring at 60℃ (stirring speed 200rpm), extracting for 120min, standing for 60min, and filtering , Dried to obtain protein flocculant.

[0042]The flocculation efficiency of protein flocculant was determined to be 88.6...

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PUM

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Abstract

The invention discloses a protein flocculant and a preparation method thereof. The preparation method comprises the following steps: soaking fish bones in a 0.01-0.1 mol / L hydrochloric acid solution,performing steam explosion treatment on the fishbone soaked with hydrochloric acid to obtain steam-exploded fishbone, adding water into the steam-exploded fishbone for extraction, and drying the filtrate obtained by extraction to obtain the protein flocculant. The prepared protein flocculant is a high-temperature water extract of fishbone, is safe, non-toxic and high in flocculation capacity, canbe used in the field of food processing wastewater treatment, and has a good application prospect.

Description

Technical field[0001]The invention relates to a protein flocculant and a preparation method thereof.Background technique[0002]Collagen is widely present in the by-products of aquatic product processing, such as skin, bone, scales, fins and other tissues. It can be hydrolyzed into collagen or gelatin under physical, chemical or enzymatic treatment conditions. The molecular weight of collagen is very large, and the relative molecular weight of unhydrolyzed collagen can reach 300kDa. Collagen contains a large number of active groups such as amino and hydroxyl groups, and has good biodegradability. After moderate treatment of collagen, it can be used to prepare natural flocculants.[0003]Fish bone contains a large number of resistant barriers such as hydroxyapatite, which is an obstacle that limits the preparation of fish bone protein resources into protein flocculants. The molecular weight of collagen prepared by conventional hydrolysis reaction is usually low. Although it contains a la...

Claims

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Application Information

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IPC IPC(8): C02F1/52
CPCC02F1/5263
Inventor 张益奇戴志远
Owner ZHEJIANG GONGSHANG UNIVERSITY
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