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Method for preparing agricultural water-retaining agent from waste green algae

An agricultural water-retaining agent and water-retaining agent technology, applied in chemical instruments and methods, applications, agriculture, etc., can solve problems such as inability to meet market requirements, and achieve the effects of facilitating use, breaking through seasonal limitations, and reducing costs

Active Publication Date: 2021-12-10
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-retaining agent obtained in this preparation method has only a single function of water retention, which cannot meet the current market requirements

Method used

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  • Method for preparing agricultural water-retaining agent from waste green algae
  • Method for preparing agricultural water-retaining agent from waste green algae
  • Method for preparing agricultural water-retaining agent from waste green algae

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Select 1kg of fresh green algae, dry it after cleaning, and then crush it with a pulverizer and pass through a 60-mesh sieve to obtain 100g of green algae dry powder; pour 100g of green algae dry powder into the lyase pool (add the feed liquid Water at a ratio of 1:20) for hydrolysis, the lyase used is a mixture of alginate lyase and chlorophyll polysaccharide lyase, the time of enzymolysis is 3 hours, the enzymolysis temperature is 40°C, after centrifugation (the centrifugal speed is 7000r / min, centrifugation time is 10min), membrane separation (the semi-permeable membrane used in membrane separation is ultrafiltration membrane (UF)) to obtain the green algae extract 1; the green algae extract 1 is passed through a 60-mesh sieve, washed, and then used The lye is subjected to alkalization pretreatment, the lye is 10% sodium hydroxide solution, the amount of lye added is 300g, the green algae extract is further hydrolyzed, and after alkali treatment at 90°C for 1 hour, e...

Embodiment 2

[0042] Embodiment 2: (low degree of neutralization)

[0043] A multifunctional integrated agricultural water-retaining agent prepared by extracting green algae cellulose from waste green algae combined with carbon-based materials. The difference from Example 1 is that the neutralization degree of the acrylic acid solution and sodium hydroxide solution is controlled at 60%. .

Embodiment 3

[0044] Example 3: (in neutralization)

[0045] A multifunctional integrated agricultural water-retaining agent prepared by extracting green algae cellulose from waste green algae combined with carbon-based materials. The difference from Example 1 is that the neutralization degree of the acrylic acid solution and sodium hydroxide solution is controlled at 65%. .

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Abstract

The invention relates to a method for preparing an agricultural water-retaining agent from waste green algae, and belongs to the technical field of water-retaining agent preparation. The prepared water-retaining agent is high in water absorption capacity and good in water-retaining effect, has high saline-alkaline resistance, and has the characteristics of low temperature resistance and no icing due to the addition of the anti-freezing agent; a microwave heating method is adopted in the aspect of efficiency, and compared with a traditional process, the limitation of high temperature and high duration is broken through; in addition, aiming at the characteristic of high extraction difficulty of fresh water green algae cellulose, a biological enzyme method and chemical method combined three-stage extraction process is adopted to greatly improve the yield of the green algae cellulose raw material, and a carbon-based material inoculated with a degradation strain, an activated clay adsorbent loaded with green algae fiber and a water-retaining agent are coupled through an ultrasonic technology, so that improvement and purification of crop soil environment are facilitated while water is retained, the waste green algae is easy to degrade completely, does not cause secondary pollution, and waste resources are used efficiently.

Description

technical field [0001] The invention belongs to the technical field of water-retaining agent preparation, and in particular relates to a method for preparing agricultural water-retaining agent by using waste green algae. Background technique [0002] In recent years, with the vigorous development of agriculture and industry-related industrial chains, while creating economic value, a lot of sewage has also been derived. The high content of nitrogen, phosphorus and potassium has made the water quality of many freshwater systems gradually develop in the direction of eutrophication. , thus causing disasters such as algal blooms. In the past, most of the flooded green algae were landfilled or devalued after being salvaged, resulting in a waste of resources, and there is no relatively mature clean follow-up treatment process for green algae. At present, in the water retaining agent market, there is no high-efficiency cellulose extraction process and subsequent related preparation...

Claims

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Application Information

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IPC IPC(8): C09K17/40C08F251/02C08F220/06C08F222/38C09K101/00
CPCC09K17/40C08F251/02C09K2101/00C08F220/06C08F222/385Y02P60/21
Inventor 彭红波林俊健杨雯雯许志敏杨杰王思瑶牛一帆
Owner KUNMING UNIV OF SCI & TECH
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