Water retaining SAP (Super Absorbent Polymer)-mixed soil prepared by using biogass fermentative residues and preparation method thereof

A biogas fermentation and residue technology, applied in chemical instruments and methods, fertilizer mixtures, soil conditioning materials, etc., can solve environmental hazards and other problems, and achieve the effects of promoting plant growth, reducing the temperature difference between day and night, and increasing ventilation

Inactive Publication Date: 2013-03-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But what follows is that more and more biogas fermentation residues are produced. If they are not effectively comprehensively utilized and resourced, the biogas fermentation residues will become solid waste and cause harm to the environment.

Method used

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  • Water retaining SAP (Super Absorbent Polymer)-mixed soil prepared by using biogass fermentative residues and preparation method thereof
  • Water retaining SAP (Super Absorbent Polymer)-mixed soil prepared by using biogass fermentative residues and preparation method thereof
  • Water retaining SAP (Super Absorbent Polymer)-mixed soil prepared by using biogass fermentative residues and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix 3.5kg of biogas residue, 1.8kg of sawdust, 0.55kg of bone meal, and 4kg of soil, and crush them until the particle size is less than 3mm. Dry matter, then take 0.15 kg of starch-grafted acrylic acid type water-retaining agent to be swollen, add it to the mixture, then add 3000 mL of biogas slurry and stir evenly, and place it in normal temperature for 20 days after anaerobic fermentation to obtain a water-retaining mixture prepared from biogas fermentation residue earth.

[0030] The mass percentage of each component in the obtained water-retaining mixed agent soil is as follows: 35% biogas residue, 18% sawdust, 5.5% bone meal, 40% soil, 1.5% starch-grafted acrylic water-retaining agent, and 3000mL biogas slurry.

Embodiment 2

[0032] Mix 3.5kg of biogas residue, 1.8kg of sawdust, 0.55kg of bone meal, and 4kg of soil, and crush until the particle size is less than 3mm. The biogas residue is the solid-phase air-dried residue of biogas fermentation of human and animal manure that has produced gas for more than 60 days, and then Take 0.15 kg of starch-grafted acrylic acid-type water-retaining agent and add it to the mixture after swelling, then add 3000 mL of biogas slurry and stir evenly. After 30 days of anaerobic fermentation at room temperature, a water-retaining mixture soil prepared from biogas fermentation residues is obtained.

[0033] The mass percentage of each component in the obtained water-retaining mixed agent soil is as follows: 35% biogas residue, 18% sawdust, 5.5% bone meal, 40% soil, 1.5% starch-grafted acrylic water-retaining agent, and 3000mL biogas slurry.

Embodiment 3

[0035] Mix 3.5kg of biogas residue, 1.8kg of sawdust, 0.55kg of bone meal, and 4kg of soil, and crush until the particle size is less than 3mm. The biogas residue is the solid-phase air-dried residue of biogas fermentation of crop straw that has produced gas for more than 60 days, and then Take 0.15 kg of starch-grafted acrylic acid type water-retaining agent and add it to the mixture after swelling, then add 3000 mL of biogas slurry and stir evenly, and place it in room temperature for anaerobic fermentation for 25 days to obtain a water-retaining mixture soil prepared from biogas fermentation residues.

[0036] The mass percentage of each component in the obtained water-retaining mixed agent soil is as follows: 35% biogas residue, 18% sawdust, 5.5% bone meal, 40% soil, 1.5% starch-grafted acrylic water-retaining agent, and 3000mL biogas slurry.

[0037] The compound fertilizer-preserving mixed agent soil that adopts embodiment 1 gained carries out physical and chemical charac...

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Abstract

The invention provides a method for preparing water-retaining mixed agent soil from biogas fermentation residues, by mixing biogas residues, sawdust, bone meal, and soil for crushing, adding swollen water-retaining agents to the mixture, and adding biogas slurry to stir evenly , after 20-30 days of anaerobic fermentation at normal temperature, the water-retaining mixed soil prepared from the residue of biogas fermentation is obtained. The preparation method is fast, simple and low in cost, and realizes the comprehensive utilization, resource utilization, reduction and harmlessness of the biogas fermentation residue. The obtained water-retaining mixed soil has the following characteristics: it can quickly absorb rainwater and irrigation water and store them to ensure the water required for normal plant growth; ensure that the soil remains moist for a long time; it has light load, low bulk density and large porosity; comprehensive nutrients, It has both slow-acting and quick-acting nutrients; it can maintain its stability and high efficiency under various plants and different climatic conditions; it saves fertilizers and pesticides; it is non-toxic, harmless, has no side effects, and does not cause any pollution to the environment.

Description

[0001] technology neighborhood [0002] The invention relates to a high-efficiency composite water-retaining mixed agent soil for greening soil and stone slopes, in particular to a water-retaining mixed agent soil prepared from biogas fermentation residues and a method thereof. Background technique [0003] With the growth of population and the continuous deterioration of ecological environment, the land resources available for human use are decreasing day by day. In recent years, due to the reclamation of wasteland, the destruction of forests, the predatory development of mineral resources, and the high-speed development of transportation, energy, communications and other industries, a large area of ​​land surface has been disturbed, resulting in land destruction and new soil erosion, and the area of ​​soil erosion has increased. reduce. Experts predict that if no attention is paid, the increasing soil erosion will inevitably affect the sustainable development of social econ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/32
Inventor 王向宇高袖宁平祝敏平李芳
Owner KUNMING UNIV OF SCI & TECH
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