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Technology for removing heavy metals in livestock manure

A technology of poultry manure and heavy metals, which is applied in the direction of animal husbandry wastewater treatment and oxidation treatment of sludge, etc. It can solve the problems of inability to remove heavy metals, ecological environment pollution, and inability to remove heavy metals in feces, so as to improve resource utilization and solve pollution , is beneficial to the effect of removing

Active Publication Date: 2017-08-04
CUG WUHAN GOLDEN SHIELD ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, composting is the main and better method for treating poultry manure, but it can only deposit heavy metals and cannot remove heavy metals in manure
"China Agricultural Science and Technology Herald" 2014, Issue 3, Volume 14 "Research Progress of Heavy Metal Pollution in my country's Livestock and Poultry Feces and Passivation Measures" (Comparative Document 1), reported that in the composting process, by adding heavy metal passivation However, this measure cannot achieve the effect of removing heavy metals. The heavy metals after passivation still remain in poultry manure, and after a period of time, heavy metals will be released, which will still pollute the ecological environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Oxidation of poultry manure

[0027] 1) Take 1000g of pig manure, and use a refiner to grind the pig manure twice;

[0028] 2) Take 300g of ground pig manure and add it to a three-necked flask, put the three-necked flask into a water bath, and heat the water bath to 40°C;

[0029] 3) Use a mechanical stirring device to quickly stir the pig manure in the three-necked flask;

[0030] 4) At 40°C, aerate the three-necked flask with aeration device for 4 hours while stirring.

[0031] 2. Removal of heavy metals in poultry manure

[0032] 5) Stop heating and aeration, pour the oxidized pig manure into the beaker, weigh 8g of magnetic heavy metal adsorbent and add it into the beaker;

[0033] 6) Use mechanical stirring to continuously stir the poultry manure in step 5) for 2 hours;

[0034] 7) Using a magnet to recover the magnetic heavy metal adsorbent in the pig manure in step 6).

Embodiment 2

[0036] 1. Oxidation of poultry manure

[0037] 1) Take 1000g of pig manure, and use a refiner to grind the pig manure 10 times;

[0038] 2) Take 300g of ground pig manure and add it to a three-necked flask, put the three-necked flask into a water bath, and heat the water bath to 80°C;

[0039] 3) Use a mechanical stirring device to quickly stir the pig manure in the three-necked flask;

[0040] 4) At 80°C, aerate the three-necked flask with aeration device for 10 hours while stirring.

[0041] 2. Removal of heavy metals in poultry manure

[0042] The steps are the same as steps 5) to 7) of Example 1.

Embodiment 3

[0044] 1. Oxidation of poultry manure

[0045] Steps are the same as steps 1) to 4) of Example 2;

[0046] 2. Removal of heavy metals in poultry manure

[0047] 5) Stop heating and aeration, pour the oxidized pig manure into the beaker, weigh 8g of magnetic heavy metal adsorbent and add it into the beaker;

[0048] 6) Use mechanical stirring to continuously stir the poultry manure in step 5) for 4 hours;

[0049] 7) Using a magnet to recover the magnetic heavy metal adsorbent in the pig manure in step 6).

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PUM

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Abstract

The invention discloses a technology for removing heavy metals in livestock manure and belongs to the technical field of heavy metal treatment and comprehensive recovery and utilization. The technology comprises an oxidation process of the livestock manure and a removal process of the heavy metals in the livestock manure. Organic functional group-chelated heavy metals in the livestock manure can be released by adopting high-temperature air oxidation, so that the ratio of effective state heavy metals is increased. The heavy metals are removed by adopting a magnetic heavy metal adsorbent, the heavy metals in the livestock manure can be efficiently, quickly and thoroughly removed, and recovery and repeated utilization of the adsorbent can be achieved. The targets of quickly, efficiently and thoroughly removing the heavy metals in the livestock manure at low cost can be achieved.

Description

technical field [0001] The invention relates to a process for removing heavy metals in poultry manure, belongs to the technical field of heavy metal treatment and comprehensive recycling, and can be used to treat poultry manure containing heavy metals. Background technique [0002] With the development of modern agriculture, the poultry and livestock breeding industry in many countries presents the characteristics of regionalization, scale, specialization and intensive operation, and my country has also become a large country of intensive breeding. With the rapid development of my country's livestock and poultry breeding industry, a large amount of livestock and poultry manure is produced. Livestock manure contains a large amount of nitrogen, phosphorus and other elements that promote the growth of crops. Livestock manure is a potential organic fertilizer source. After treatment, it can be used in agricultural production to improve soil fertility and purify the ecological en...

Claims

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Application Information

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IPC IPC(8): C02F11/06C02F103/20
CPCC02F11/06C02F2103/20
Inventor 范力仁石建行胡三荣周小丹
Owner CUG WUHAN GOLDEN SHIELD ENVIRONMENTAL TECH CO LTD
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