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Magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater as well as preparation method and application of magnesium-containing biochar liquid material

A technology for liquid materials and pig farm wastewater, which is applied in the direction of water pollutants, chemical instruments and methods, and animal husbandry wastewater treatment, etc., to achieve the effect of broad prospects, low cost, and improved adsorption efficiency

Pending Publication Date: 2022-03-15
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is simple and easy to operate, convenient to obtain materials, can effectively utilize industrial solid waste and pig farm waste, and turn them into resources. At the same time, it can effectively solve the problems of deep color of pig farm biochemical effluent and eutrophication of water body

Method used

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  • Magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater as well as preparation method and application of magnesium-containing biochar liquid material

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Embodiment 1

[0030] This embodiment provides a method for preparing a magnesium-containing biochar liquid material that recovers phosphorus from pig farm wastewater, including the following preparation steps:

[0031] (1) Dry the magnesium-containing waste slag collected from the power plant in an oven at 105°C, grind it through 100 mesh, and add the magnesium-containing waste slag powder to the pig manure dry weight ratio of 1:5 to a moisture content of 70% Add water to the wet pig manure according to the V:W liquid-solid ratio of 2:1 (mL:g) and stir thoroughly to make the two fully mixed, and dry at 105°C for later use.

[0032] (2) Put the dried solid in step (1) into a tube furnace, use nitrogen as the protective gas, raise the temperature in the furnace to 600°C at a rate of 10°C / min, keep the temperature for 1h, and cool to room temperature. The magnesium-modified pig manure biochar was obtained.

[0033] (3) The magnesium-modified pig manure biochar was ground in a colloid mill for...

Embodiment 2

[0036] This embodiment provides a preparation method for recovering phosphorus element and magnesium-containing biochar liquid material in pig farm wastewater, including the following preparation steps:

[0037] (1) Dry the magnesium-containing waste slag collected from the power plant in an oven at 105°C, grind it through 100 mesh, and add the magnesium-containing waste slag powder to the pig manure dry basis weight ratio of 1:8 to a moisture content of 72% Add water to the wet pig manure according to the V:W liquid-solid ratio of 2:1 (mL:g) and stir thoroughly to make the two fully mixed, and dry at 105°C for later use.

[0038] (2) Put the dried solid in step (1) into a tube furnace, use nitrogen as a protective gas, raise the temperature in the furnace to 700°C at a rate of 10°C / min, keep the temperature for 1h, and cool to room temperature. The magnesium-modified pig manure biochar was obtained.

[0039] (3) Grind the magnesium-modified pig manure biochar in step (2) in ...

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Abstract

The invention belongs to the technical field of wastewater treatment and solid waste resource utilization, and discloses a magnesium-containing biochar liquid material for recovering phosphorus element in pig farm wastewater and a preparation method and application of the magnesium-containing biochar liquid material. The magnesium-containing biochar liquid material is prepared by the following steps: adding water into a mixture of magnesium-containing waste residue powder and wet pig manure, fully and uniformly mixing, drying, pyrolyzing the obtained solid at 600-700 DEG C in a protective atmosphere, adding water into the magnesium-containing waste residue modified pig manure biochar, and grinding in a colloid mill. According to the method, the pig manure biochar can be modified by fully utilizing the byproduct magnesium-containing waste residues of flue gas desulfurization of a power plant and ground into a liquid material, the liquid material is applied to advanced treatment of biochemical effluent of a pig farm, the phosphorus recovery rate reaches 99% or above, the adsorption capacity is 117mg / g or above, and meanwhile, the chroma removal rate reaches 87% or above.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and solid waste resource utilization, and more specifically relates to a magnesium-containing biochar liquid material for recovering phosphorus in pig farm wastewater, a preparation method and application thereof. Background technique [0002] my country is a large animal husbandry production country. In recent years, the proportion of large-scale pig farms has become higher and higher, resulting in a large amount of fecal waste. At present, most large-scale pig farms use black-membrane biogas digesters to treat pig manure. After the biochemical treatment of the effluent biogas slurry, there will still be problems such as phosphorus discharge and deep color, which will easily cause eutrophication of the water body and endanger the survival of water animals. . Therefore, it is necessary to further recover phosphorus resources. The recovery of phosphorus by adsorption is a promising m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/10C02F103/20
CPCB01J20/20B01J20/041C02F1/281C02F1/283C02F2101/105C02F2103/20B01J2220/4887
Inventor 王德汉吴昭云何林彤曾维深
Owner SOUTH CHINA AGRI UNIV
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