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Biochar material loaded with magnesium and phosphate ions and application of material in denitrification of leather waste water

A technology of phosphate ion and bio-carbon materials, which is applied in biological water/sewage treatment, animal processing wastewater treatment, special compound water treatment, etc. It can solve the problems of less reagent addition, secondary pollution, and inability to effectively remove ammonia nitrogen. To achieve the effect of improving mineralization ability

Inactive Publication Date: 2019-04-05
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding Mg to the wastewater containing ammonia nitrogen 2+ 、PO 4 3- Reagents that generate MgNH 4 PO 4 , but the method does not work for Mg 2+ , NH 4 + 、PO 4 3- There are strict requirements on the proportion of reagents. If the amount of reagent added is small, the ammonia nitrogen in the wastewater cannot be effectively removed. If the amount added is too large, it will cause secondary pollution.

Method used

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  • Biochar material loaded with magnesium and phosphate ions and application of material in denitrification of leather waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Dissolve dry yeast powder (100g) and glucose (200g) in deionized water (10L), incubate at 30°C for 1.0h, centrifuge and wash with deionized water to obtain yeast;

[0021] (2) Add MgCl to the yeast obtained in step (1) 2 Solution (10L, 1mol / L) and H 3 PO 4 Solution (10L, 1mol / L), at room temperature, after stirring for 0.5h, heating to 180℃, reacting for 5h, centrifuging, washing with deionized water, drying and grinding to obtain the precursor;

[0022] (3) Place the precursor obtained in step (2) in a tube furnace, under the protection of nitrogen, raise it to 800°C at a heating rate of 10°C / min, calcinate for 4 hours, and return to room temperature to obtain the load Bio-carbon material of magnesium and phosphate ions (hereinafter referred to as product A).

Embodiment 2

[0024] (1) Dissolve dry yeast powder (100g) and glucose (200g) in deionized water (10L), incubate at 35°C for 0.5h, centrifuge and wash with deionized water to obtain yeast;

[0025] (2) Add MgCl to the yeast obtained in step (1) 2 Solution (10L, 1mol / L) and H 3 PO 4 Solution (10L, 1mol / L), at room temperature, after stirring for 0.5h, heating to 170℃, after 8h reaction, centrifugation, washing with deionized water, drying and grinding to obtain the precursor;

[0026] (3) Place the precursor obtained in step (2) in a tube furnace, under the protection of nitrogen, raise it to 800°C at a heating rate of 10°C / min, calcinate for 4 hours, and return to room temperature to obtain the load Bio-carbon material of magnesium and phosphate ions (hereinafter referred to as product B).

Embodiment 3

[0028] (1) Dissolve dry yeast powder (100g) and glucose (200g) in deionized water (10L), incubate at 30°C for 1.0h, centrifuge and wash with deionized water to obtain yeast;

[0029] (2) Add MgCl to the yeast obtained in step (1) 2 Solution (10L, 0.1mol / L) and H 3 PO 4 Solution (10L, 0.1mol / L), at room temperature, after stirring for 0.5h, heating to 180°C, after reaction for 5h, centrifugation, washing with deionized water, drying and grinding to obtain the precursor;

[0030] (3) Place the precursor obtained in step (2) in a tube furnace, under the protection of nitrogen, raise it to 800°C at a heating rate of 10°C / min, calcinate for 4h, and return to room temperature to obtain the loaded magnesium and Phosphate ion bio-carbon material (hereinafter referred to as product C).

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Abstract

The invention relates to a biochar material loaded with magnesium and phosphate ions and an application of the material in denitrification of leather waste water. The preparation method of the biocharmaterial includes the following steps: (1) dissolving dry yeast powder and glucose in deionized water, culturing at 30-35 DEG C for 0.5-1.0 hour, centrifuging, and washing with the deionized water toobtain yeast; (2) adding a MgCl2 solution and a H3PO4 solution to the yeast obtained in step (1), stirring at room temperature for 0.5 hour, heating to 170-180 DEG C, reacting for 5-8 hours, centrifuging, washing with the deionized water, drying, and grinding to obtain a precursor; (3) placing the precursor obtained in the step (2) in a tubular furnace, raising the temperature to 800 DEG C at a heating rate of 10 DEG C / min under the protection of nitrogen, calcining for 4 hours, and returning to room temperature to obtain the biochar material loaded with magnesium and phosphate ions.

Description

Technical field [0001] The invention belongs to the field of materials and wastewater treatment, and specifically relates to a biological carbon material loaded with magnesium and phosphate ions and its application in the denitrification of leather wastewater. Background technique [0002] The ammonia nitrogen pollution produced by the leather wastewater treatment process mainly comes from two aspects: one is the various ammonium salts added during the processing; the other is the conversion of organic nitrogen from the leather itself. The processes containing ammonia nitrogen in wastewater include water soaking, dehairing, tanning, neutralization and dyeing. Among them, ammonium sulfate and ammonium chloride are used in the deashing and softening process. In the neutralization and dyeing process, ammonium bicarbonate and liquid ammonia are also used; The ammonia nitrogen in the acid and tanning process comes from the continuous release of ammonium salt residues in the leather. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/10C02F101/16C02F103/24
CPCC02F3/34C02F2101/105C02F2101/16C02F2103/24C02F2305/06
Inventor 王卫霞张书攀
Owner YANGZHOU POLYTECHNIC INST
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