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A method for preparing carbon-based fertilizer from perishable garbage

A carbon-based fertilizer and raw material technology, applied in the field of carbon-based fertilizer preparation, can solve the problems of heavy metal ion treatment and harm to human health, and achieve the effects of improving soil quality, reducing the amount of chemical fertilizers, and accelerating maturity

Active Publication Date: 2022-06-21
HANGZHOU NAXI ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is known that more heavy metal ions may be accumulated in the perishable garbage in the existing farmer's market due to heavy metal enrichment factors. The heavy metal ions are not treated in the preparation process, which will inevitably lead to their accumulation in crops, and eventually reach the human body and endanger human health.
Similar technology, such as the Chinese patent with publication number CN110540481A, pays too much attention to the suppression of nitrogen loss in the process of biochar preparation, and does not adequately treat heavy metal ions in perishable garbage

Method used

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  • A method for preparing carbon-based fertilizer from perishable garbage
  • A method for preparing carbon-based fertilizer from perishable garbage
  • A method for preparing carbon-based fertilizer from perishable garbage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1: a kind of preparation method of carbon-based fertilizer:

[0050] 1) Non-degradable substances such as metals, fabrics, plastics, glass, rubber, feathers, stones and other non-degradable materials are picked out from perishable garbage, and then introduced into a twin-screw extruder, and extruded and puffed at a screw speed of 150 r / min and an extrusion temperature of 80 °C , and then pulverized into 0.5cm pieces, adjusted the water content to 60% and soaked for 0.5h to obtain pre-wetted raw materials;

[0051] 2) Dissolve thiourea, urea and ferric chloride in sufficient ultrapure water in a weight ratio of 1:5:1, add them to the lining of the hydrothermal reactor, heat at 160°C for 0.5h, cool to room temperature and then centrifuge, The supernatant was dialyzed for 48h, and the multi-element doped carbon quantum dots were freeze-dried;

[0052] 3) per ton of step 1) the obtained pre-wet raw material is evenly mixed with 100g of step 2) obtained multi-ele...

Embodiment 2

[0055] Embodiment 2: a kind of preparation method of carbon-based fertilizer:

[0056] 1) The perishable garbage is picked out of non-degradable substances such as paper, metal, wood, fabric, plastic, glass, rubber, feathers, stones, etc., and then introduced into a twin-screw extruder. The screw speed is 300r / min and the extrusion temperature is 100℃. Squeeze and puff, then pulverize into 2.0cm pieces, adjust the water content to 70% and soak for 1.0h to obtain pre-wetted raw materials;

[0057] 2) Dissolve thiourea, urea and ferric chloride in sufficient ultrapure water in a weight ratio of 1:10:2, add them to the lining of the hydrothermal reactor, heat at 180°C for 1.0h, cool to room temperature and then centrifuge, The supernatant was dialyzed for 48h, and the multi-element doped carbon quantum dots were freeze-dried;

[0058] 3) per ton of step 1) the obtained pre-wet raw material is evenly mixed with 120g of step 2) obtained multi-element-doped carbon quantum dots, 10k...

Embodiment 3

[0061] Embodiment 3: a kind of preparation method of carbon-based fertilizer:

[0062] 1) The perishable garbage is sorted out of non-degradable substances such as paper, metal, wood, fabric, plastic, glass, rubber, feathers, stones, etc., and then introduced into the twin-screw extruder. The screw speed is 240r / min and the extrusion temperature is 95℃. Squeeze and puff, then pulverize into 1cm pieces, adjust the water content to 65% and soak for 1.0h to obtain pre-wetted raw materials;

[0063] 2) Dissolve thiourea, urea and ferric chloride in sufficient ultrapure water in a weight ratio of 1:8:2, add them to the lining of the hydrothermal reactor, heat at 168°C for 1.0h, cool to room temperature and then centrifuge, The supernatant was dialyzed for 48 hours, and the multi-element doped carbon quantum dots were freeze-dried. The TEM image was as follows figure 1 As shown, the particle size distribution is as figure 2 shown;

[0064] 3) per ton of step 1) the obtained pre-...

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Abstract

The invention relates to the technical field of biochar-based fertilizers, in particular to a method for preparing carbon-based fertilizers using perishable garbage as a raw material. The perishable garbage is sorted out of non-degradable substances, extruded and puffed at a temperature of 80-100°C, crushed and then added with water to The water content is 60-70%, adding fermentative agent and urea for aerobic high-temperature decomposing to obtain decomposed fertilizer, adding biochar to the decomposed fertilizer and placing it in an anaerobic state to obtain carbon-based fertilizer. Extrusion and puffing of perishable waste can significantly speed up its decomposing process. The carbon-based fertilizer after aerobic high-temperature composting is rich in nutrients and low in heavy metals, and the nutrients and fertility of carbon-based fertilizers are effectively preserved.

Description

technical field [0001] The invention relates to the technical field of biochar-based fertilizers, in particular to a method for preparing carbon-based fertilizers by using perishable garbage as a raw material. Background technique [0002] Perishable garbage, also known as kitchen garbage or wet garbage, generally refers to the kitchen waste generated in the production process of catering operators, unit canteens, etc., as well as the perishable garbage generated in family life, mainly including: leftovers , vegetable stems and leaves, meat offal, shell and melon rind, etc. The perishable garbage has high moisture content, and the proportion of organic matter in it is also high (about 95% of the dry matter mass), which is easy to putrefy and stink, and is easy to breed bacteria and pathogenic microorganisms. Causes the spread and infection of pathogenic bacteria. In addition to the high content of organic matter, perishable garbage is also rich in nitrogen, phosphorus, pot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G3/80C05F17/80
CPCC05G3/00C05F17/80C05F9/00C05C9/00C05F11/00C05F17/20Y02W30/40
Inventor 徐坚麟付源张素
Owner HANGZHOU NAXI ECOLOGICAL TECH CO LTD