Method for preparing bio-organic fertilizer from waste residue of colocasia esculenta

Abstract

The application discloses a method for preparing bio-organic fertilizer from waste residues of Marocephala esculenta. The method comprises the following steps: taking waste residues of Marocephala esculenta powder or polyphenol flavonoid extraction as main materials, adding livestock and poultry manure and straws as auxiliary materials, and preparing the bio-organic fertilizer through aerobic fermentation of composite microorganisms and low-temperature drying. The method realizes harmless and high-value utilization of the waste residues, and has the advantages of green process, short cycle, complete composting, high nutrient content of the finished product, and containing beneficial active bacteria. The bio-organic fertilizer can improve soil, promote growth and increase yield, and is suitable for large-scale production.

Description

Technical Field

[0001] This invention belongs to the field of starch deep processing technology, specifically relating to a method for preparing bio-organic fertilizer from banana taro waste residue. Background Technology

[0002] Canna edulis Ker, also known as banana taro, is a perennial herbaceous plant belonging to the genus Canna in the family Cannaceae. It is widely cultivated in southwestern and southern my country and is a high-yield starch crop. However, the starch processing of Canna edulis produces a large amount of starch residue. Its stems, leaves, and fine roots are often discarded or used as low-grade animal feed, resulting in resource waste and potential environmental pollution.

[0003] Existing processes for preparing bio-organic fertilizer from agricultural waste either fail to adapt to the characteristics of banana taro waste residue, resulting in incomplete waste conversion and low nutrient content in the organic fertilizer; or they are complex, energy-intensive, require the addition of large amounts of chemical additives, pose a risk of secondary pollution, and have high production costs, making large-scale application difficult. Meanwhile, the demand for green bio-organic fertilizer in current agricultural production is increasingly urgent, necessitating a highly efficient, environmentally friendly, and economical preparation method for converting banana taro waste residue, achieving a win-win situation for both waste resource utilization and ecological protection.

[0004] Studies have shown that the starch residue, stems, leaves, and fine roots of banana taro are rich in natural active substances such as polyphenols and flavonoids, which possess antioxidant, anti-inflammatory, antibacterial, hypoglycemic, and hepatoprotective biological activities, and have high application value in the fields of food, health products, cosmetics, and medicine. Currently, the extraction of plant polyphenols and flavonoids is mostly based on single raw materials and single components. There are few reports on comprehensive and simultaneous extraction processes for all by-products of banana taro (starch residue, stems, leaves, and fine roots), and traditional processes suffer from low extraction efficiency, high energy consumption, easy destruction of active ingredients, and solvent residues, making it difficult to meet the needs of efficient industrial production. Summary of the Invention

[0005] This invention aims to overcome the shortcomings of existing technologies and provide a method for preparing bio-organic fertilizer from banana taro waste residue. This method is an efficient, environmentally friendly, and economical preparation method for converting banana taro waste residue, and realizes a solution for the resource utilization and ecological protection of waste residue.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A method for preparing bio-organic fertilizer from banana taro waste includes the following steps: S1: Raw material pretreatment: Banana taro powder residue or polyphenol flavonoid extraction waste residue, dried at 55-65℃ to 12%-18% moisture content, and crushed through 30-50 mesh; livestock and poultry manure air-dried to 20%-25% moisture content, and straw crushed to 2-5cm, for later use.

[0007] S2: Ingredient mixing: Take 60-70 parts by weight of banana taro waste residue, 15-25 parts of livestock and poultry manure, 8-12 parts of straw, 3-5 parts of wood ash, and 1-2 parts of composting accelerator, and adjust the moisture content to 55%-65% and the pH to 6.5-7.5.

[0008] S3: Microbial activation: Bacillus subtilis: Bacillus spp.: Saccharomyces cerevisiae: Lactic acid bacteria = 2:2:1:1, total viable count ≥10¹ 0 CFU / g, activate in warm water at 35-40℃ for 25-35 minutes.

[0009] S4: Aerobic fermentation: Spray in bacterial solution at 0.4%-0.8%, pile up to a height of 0.8-1.2m, ferment at 25-32℃ for 15-20 days, turn the pile at 50-55℃, and control the temperature to ≤65℃.

[0010] S5: Post-processing: Dry at 40-50℃ until moisture content ≤20%, add 0.2%-0.5% biochar, pulverize through 60-80 mesh to obtain the finished product.

[0011] Furthermore, the waste residue is dried at a temperature of 55-65℃ with a moisture content of 12%-18%.

[0012] Furthermore, the composting accelerator is corn steep liquor powder: potassium dihydrogen phosphate = 3:1.

[0013] Furthermore, the fermentation process involves turning the pile over every 2-3 days.

[0014] Furthermore, the finished product has an organic matter content of ≥42% and an effective viable bacteria count of ≥0.4 billion CFU / g. Compared with the prior art, the beneficial effects of the present invention are:

[0015] To efficiently realize the resource utilization of banana taro waste residue, completely solve the resource waste and environmental pollution problems caused by waste residue disposal and incineration, and practice the concept of green agriculture and circular agriculture; The process is simple and easy to operate, requiring no complex equipment or large amounts of chemical additives. It has low energy consumption and low cost, making it suitable for large-scale production. The prepared bio-organic fertilizer is nutrient-balanced, rich in organic matter, amino acids and various trace elements, and retains the active ingredients remaining in the banana taro waste residue. It can improve soil structure, enhance soil fertility, promote crop growth and reduce the amount of chemical fertilizer used. The entire preparation process is green and environmentally friendly, with no secondary pollution. It not only reduces the cost of waste disposal, but also provides high-quality green organic fertilizer for agricultural production, thus achieving ecological, economic and social benefits. Detailed Implementation

[0016] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are only preferred embodiments of this invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0017] Example 1 (Best) 1. The waste residue from banana taro extraction was dried at 60℃ and pulverized through a 40-mesh sieve; corn stalks were 3cm thick, and cow dung was air-dried.

[0018] 2. Waste residue 65, cow dung 20, straw 10, wood ash 4, composting accelerator 1.5, moisture content adjusted to 60%, pH 7.0.

[0019] 3. Activate the compound microbial agent at 38℃ for 30 minutes.

[0020] 4. Add 0.6% bacterial solution, pile up to a height of 1.0m, ferment at 28℃ for 18 days, turn the pile every 2 days, and control the temperature at 50-60℃.

[0021] 5. Dry at 45℃, add 0.3% biochar, and pass through a 70-mesh sieve.

[0022] Results: Organic matter 45.2%, live bacteria 0.52 billion / g, fully decomposed. Example 2

[0023] 1. Dry the banana and taro residue at 55℃, air-dry the pig manure, and crush the rice straw.

[0024] 2. Waste residue 60, pig manure 25, straw 8, wood ash 3, accelerator 1, moisture 55%, pH 6.5.

[0025] 3. Activate the bacterial agent at 35℃ for 35 minutes.

[0026] 4. Add 0.4% bacterial solution, ferment at 28℃ for 15 days, and turn the pile every 3 days.

[0027] 5. Dry at 40℃, add 0.2% biochar, and pass through a 60-mesh sieve.

[0028] Results: Organic matter 42.8%, viable bacteria 0.42 billion / g. Example 3

[0029] 1. Extract waste residue and dry it at 65℃, air-dry sheep manure, and crush wheat straw.

[0030] 2. Waste residue 70, sheep manure 15, straw 12, wood ash 5, accelerator 2, moisture 65%, pH 7.5.

[0031] 3. Activate the bacterial agent at 40℃ for 25 minutes.

[0032] 4. Add 0.8% bacterial solution, ferment at 32℃ for 20 days, and turn the pile every 2 days.

[0033] 5. Dry at 50℃, add 0.5% biochar, and pass through an 80-mesh sieve.

[0034] Results: Organic matter 46.3%, viable bacteria 0.55 billion / g.

[0035] Comparative Example Without the addition of compound microbial agents, after 35 days of fermentation, the organic matter content is 31.6%, there are no live bacteria, and the fertilizer effect is poor.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing bio-organic fertilizer from banana taro waste, characterized in that, Includes the following steps: S1: Raw material pretreatment: Banana taro powder residue or polyphenol flavonoid extraction waste residue, dried at 55-65℃ to 12%-18% moisture content, and pulverized through 30-50 mesh; livestock and poultry manure air-dried to 20%-25% moisture content, and straw pulverized to 2-5cm, for later use; S2: Ingredient mixing: Take 60-70 parts by weight of banana taro waste residue, 15-25 parts of livestock and poultry manure, 8-12 parts of straw, 3-5 parts of wood ash, and 1-2 parts of composting accelerator, and adjust the moisture content to 55%-65% and the pH to 6.5-7.

5. S3: Microbial activation: Bacillus subtilis: Bacillus spp.: Saccharomyces cerevisiae: Lactic acid bacteria = 2:2:1:1, total viable count ≥10¹ 0 CFU / g, activate in warm water at 35-40℃ for 25-35 minutes; S4: Aerobic fermentation: Spray in bacterial solution at 0.4%-0.8%, pile up to a height of 0.8-1.2m, ferment at 25-32℃ for 15-20 days, turn the pile at 50-55℃, and control the temperature to ≤65℃; S5: Post-processing: Dry at 40-50℃ until moisture content ≤20%, add 0.2%-0.5% biochar, pulverize through 60-80 mesh to obtain the finished product.

2. The method for preparing bio-organic fertilizer from banana taro waste residue according to claim 1, wherein the waste residue is dried at a temperature of 55-65℃ and has a moisture content of 12%-18%.

3. The method for preparing bio-organic fertilizer from banana taro waste residue according to claim 1, wherein the composting accelerator is corn steep liquor powder: potassium dihydrogen phosphate = 3:

1.

4. In the method for preparing bio-organic fertilizer from banana taro waste according to claim 1, the fermentation pile is turned over every 2-3 days.

5. The method for preparing bio-organic fertilizer from banana taro waste residue according to claim 1, wherein the finished product has an organic matter content ≥ 42% and an effective viable bacteria count ≥ 0.4 billion CFU / g.