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A kind of denitrification functional packing and its preparation and application

A functional filler, denitrification technology, applied in chemical instruments and methods, granular microbial carrier treatment, water/sludge/sewage treatment, etc. growth and other problems, to avoid sludge bulking, reduce dosing, and produce less sludge.

Active Publication Date: 2020-12-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, only through iron autotrophic denitrification technology, iron-carbon filler will produce a large amount of OH when it produces a primary battery reaction in water - , so that the pH in the water continues to rise, which is not suitable for the survival of microorganisms; at the same time, with the continuous progress of iron-carbon micro-electrolysis, ferric oxide will be formed on the surface of the filler, which hinders the micro-electrolysis reaction and the growth of microorganisms; similarly, A large amount of H will be produced simply through sulfur autotrophic denitrification + , making the pH in the reactor drop continuously, which is finally unsuitable for microbial growth, and the high concentration of SO 4 2- cause the accumulation of nitrite nitrogen

Method used

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  • A kind of denitrification functional packing and its preparation and application
  • A kind of denitrification functional packing and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this example, the denitrification functional filler used in low C / N wastewater biological denitrification technology with reduced carbon source dosage, the preparation steps are as follows:

[0045] 1) Raw material selection: the selected reduced iron powder is 200 mesh; the activated carbon is 200 mesh; the particle size of sulfur particles is 0.5-1mm; the copper powder is 200 mesh;

[0046] 2) Preparation of nitrogen-removing functional filler: Blend and mix each component according to a certain mass ratio, including 30% reduced iron powder, 10% activated carbon, 5% copper powder, 30% sulfur, 15% calcium sulfate, and 5% ammonium bicarbonate , NaOH 5%. Slowly add 15% water of the mass sum of each component to form a viscous mixed material, fill the mixed material into a spherical mold with a particle size of 9mm, and dry the material in a vacuum oven at 60°C for 8 hours. Then take it out from the mold, and dry it in a vacuum drying oven at 100°C to make holes, and ...

Embodiment 2

[0050] In this example, the denitrification functional filler used in low C / N wastewater biological denitrification technology with reduced carbon source dosage, the preparation steps are as follows:

[0051] 1) Raw material selection: the selected reduced iron powder is 200 mesh; the activated carbon is 200 mesh; the sulfur particle size is 0.5-1mm; the copper powder is 200 mesh; the magnesium powder is 200 mesh;

[0052] 2) Preparation of nitrogen-removing functional filler: Blend and mix each component according to a certain mass ratio, including 30% reduced iron powder, 10% activated carbon, 3% copper powder, 2% magnesium powder, 30% sulfur, and 15% sodium alginate , Ammonium Bicarbonate 5%, Sodium Dihydrogen Phosphate 5%. Slowly add 15% water of the mass sum of each component to form a viscous shape, fill the mixed material into a spherical mold with a particle size of 9mm, dry the material in a vacuum oven at 60°C for 8 hours, and then remove it from the mold Take it ou...

Embodiment 3

[0056] In this example, the denitrification functional filler used in low C / N wastewater biological denitrification technology with reduced carbon source dosage, the preparation steps are as follows:

[0057] 1) Selection of raw materials: the selected reduced iron powder is 200 mesh; the activated carbon is 200 mesh; the particle size of sulfur particles is 0.5-1mm; the manganese powder is 200 mesh; the tin powder is 200 mesh;

[0058] 2) Preparation of nitrogen-removing functional filler: mix and mix the components according to a certain mass ratio, including 25% reduced iron powder, 8% activated carbon, 3% manganese powder, 2% tin powder, 38% sulfur, 18% gum arabic, Ammonium oxalate 3%, calcium carbonate 3%. Slowly add 15% water of the mass sum of each component to form a viscous shape, fill the mixed material into a spherical mold with a particle size of 9mm, dry the material in a vacuum oven at 60°C for 8 hours, and then remove it from the mold Take it out and dry it in ...

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Abstract

The invention discloses a denitrification-function filler and preparation and application thereof. The filler is prepared from, by mass, 20-30% of reduced iron powder, 8-10% of activated carbon, 30-40% of sulphur, 2-6% of a metal catalyst, 15-20% of a pore-forming agent, 3-5% of a pore-forming agent and 3-5% of a pH adjustment agent. The filler belongs to denitrification-function filler for reducing carbon source addition. The preparation method of the denitrification-function filler comprises the following steps that all the components are mixed evenly according to the mass ratio, water withthe weight accounting for 15-20% of the weight sum of all the components is slowly added, a thick mixed material is formed, the mixed material is placed in a mold, the mold is placed in a vacuum drying box for drying, after demolding, drying and hole formation are conducted in the vacuum drying box, and the denitrification-function filler is prepared. According to the prepared denitrification-function filler, the iron autotrophic denitrification technology and sulfur autotrophic denitrification technology are creatively combined, the problem of extremely low or high pH in a reactor is solved,accumulation of nitrite nitrogen is not discovered, and the filler has a great removal effect.

Description

technical field [0001] The invention relates to nitrogen-containing domestic sewage and industrial waste water treatment technology, in particular to a denitrification functional filler and its preparation and application. Background technique [0002] With the development of the economy, due to the improvement of human living standards and the excessive use of agricultural chemical fertilizers, a large amount of nitrogen-containing domestic sewage and industrial wastewater are discharged into the water body. Excessive nitrogen content will cause eutrophication of the water body and can be transformed into The "three causes" substance nitrite nitrogen seriously threatens human health. When the human body ingests excessive nitrate nitrogen, it will cause abdominal pain, diarrhea, vomiting, essential hypertension, respiratory tract infection, abnormal immune system, and increase the risk of central nervous system birth defects in babies. In addition, nitrate nitrogen will be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/00C02F3/10C02F101/16
CPCC02F3/00C02F3/105C02F3/106C02F3/107C02F3/34C02F2003/001C02F2003/003C02F2101/163Y02W10/10
Inventor 彭剑峰郑绍智刘会娟孙欣曲久辉
Owner TSINGHUA UNIV
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