Method for preparing cow dung charcoal for inhibiting nitrogenous fertilizer leaching loss

A biochar, cow dung technology, applied in fertilizer mixture, fertilization device, agricultural gas emission reduction and other directions, can solve the problem of no discovery, and achieve the effect of improving utilization efficiency, good economic benefits, and soil improvement

Inactive Publication Date: 2014-09-10
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no relevant reports have been found through literature and patent searches on the related r

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  • Method for preparing cow dung charcoal for inhibiting nitrogenous fertilizer leaching loss
  • Method for preparing cow dung charcoal for inhibiting nitrogenous fertilizer leaching loss

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example one

[0026] 1. Pre-treatment of cow dung:

[0027] 1.1 Collection of cow dung

[0028] Remove the rocks and other debris from the fresh cow dung. Make the amount of impurities less than 5%.

[0029] 1.2. Drying of cow dung

[0030] Add 1% quicklime to the collected cow dung and mix it thoroughly to prevent the anaerobic fermentation of the cow dung. The cow dung is spread flat on a clean hard cement board with a thickness of 10 cm, and it is air-dried for 6 days under natural ventilation. This reduces the moisture content of cow dung below 20%.

[0031] 2. Preparation of biochar

[0032] 2.1 Warm up

[0033] Spread the dried cow dung flat on a tray with a thickness of 3 cm. Put it in an oven and dry it at 95°C for 5 hours to keep the moisture content of the cow dung below 8%.

[0034] 2.2 Pyrolysis of biochar

[0035] Put the above-mentioned preheated cow dung into crucible utensils, put it in the muffle furnace, and then close the muffle furnace door. Turn on the power ...

Example Embodiment

[0041] Example two

[0042] 1. Pre-treatment of cow dung:

[0043] 1.1 Collection of cow dung

[0044] Remove the rocks and other debris from the fresh cow dung. Make the amount of impurities less than 5%.

[0045] 1.2. Drying of cow dung

[0046] Add 1.5% quicklime to the collected cow dung and mix it thoroughly to prevent the anaerobic fermentation of the cow dung. The cow dung is spread flat on a clean hard cement board with a thickness of 12 cm and dried in natural air for 9 days under natural ventilation. This reduces the moisture content of cow dung below 20%.

[0047] 2. Preparation of biochar

[0048] 2.1 Warm up

[0049] Spread the dried cow dung flat on a tray with a thickness of 4 cm. Put it into an oven and dry it at 100°C for 4 hours to keep the moisture content of the cow dung below 8%.

[0050] 2.2 Pyrolysis of biochar

[0051] Put the above-mentioned preheated cow dung into crucible utensils, put it into the muffle furnace, and then close the muffle furnace door. Turn on...

Example Embodiment

[0057] Example three

[0058] 1. Pre-treatment of cow dung:

[0059] 1.1 Collection of cow dung

[0060] Remove the rocks and other debris from the fresh cow dung. Make the amount of impurities less than 5%.

[0061] 1.2. Drying of cow dung

[0062] Add 2% quicklime to the collected cow dung and mix thoroughly so that the cow dung will not ferment anaerobic. The cow dung is laid flat on a clean hard cement board with a thickness of 15 cm and air-dried for 12 days under natural ventilation. The moisture content of cow dung is reduced below 20%.

[0063] 2. Preparation of biochar

[0064] 2.1 Warm up

[0065] Spread the dried cow dung flat on a tray with a thickness of 5 cm. Put it in an oven and dry it at 105°C for 3 hours to keep the moisture content of the cow dung below 8%.

[0066] 2.2 Pyrolysis of biochar

[0067] Put the above-mentioned preheated cow dung into crucible utensils, put it in the muffle furnace, and then close the muffle furnace door. Turn on the power control switch o...

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Abstract

The invention discloses a method for preparing cow dung charcoal for inhibiting nitrogenous fertilizer leaching loss, and relates to a charcoal preparation method. The method comprises the following steps of pretreating cow dung, namely, collecting and drying cow dung so as to reduce the water content of cow dung to be 10-20%; preparing the charcoal, namely, preheating to keep the water content of cow dung to be about 5-8%; splitting the charcoal, namely, performing pyrolysis for 2-3 hours under anoxic condition; finally turning off a power supply control switch of a muffle furnace; cooling to be less than 80 DEG C under the condition that the door of the muffle furnace is closed; taking out a crucible utensil from the muffle furnace; putting into a drier for being cooled for later use; crushing the charcoal, namely, putting the cow dung charcoal prepared from splitting into a crushing machine for crushing, screening, and taking the cow dung charcoal of 20-40 meshes. Due to adoption of the method of applying the cow dung charcoal soil improver, the resource utilization ways of cow dung are widened, the utilization efficiency of a nitrogenous fertilizer is improved, and the environment pollution caused by nitrogenous fertilizer leaching loss is reduced.

Description

technical field [0001] The invention relates to a method for preparing biochar, in particular to a method for preparing cow dung biochar that suppresses nitrogen fertilizer leaching. Background technique [0002] At present, the main research and application directions of the utilization of cow dung biomass resources are: using cow dung to produce organic fertilizers, producing edible fungi, and mixing cow dung with cow urine to produce biogas, etc. However, these cow dung resource utilization methods also have deficiencies. One is the limited utilization rate of the produced cow dung, and the other is the problem of secondary pollution generated during the utilization of cow dung. According to survey statistics, only about 10% of cow dung is processed and used as agricultural fertilizers, etc., and the remaining 90% of cow dung is in a state of accumulation and storage. The accumulated cow dung not only contributes to soil, water, atmosphere, human Health has brought a new...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/90
CPCY02P60/21Y02A40/22
Inventor 林静雯吴丹孙丽娜王丹丹张岩谢东青
Owner SHENYANG UNIV
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