A composite material and method for removing nitrogen and phosphorus in wastewater

A composite material and wastewater technology, applied in the field of water purification, can solve the problems of insufficient carbon source, weak impact resistance, long generations of nitrifying bacteria, etc., and achieve the effect of improving the removal efficiency of nitrogen and phosphorus

Active Publication Date: 2022-03-11
BIOLOGY INST OF HEBEI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional A / A / O and improved UCT, MUCT and other processes still have problems such as insufficient carbon source, weak impact resistance, long generations of nitrifying bacteria, slow reproduction, etc., resulting in low efficiency of nitrogen and phosphorus removal, and it is difficult to meet the industrial requirements. practical requirements in the application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A composite material for removing nitrogen and phosphorus in waste water comprises the following raw materials in parts by weight: 45 parts of iron tailing sand, 15 parts of steel slag, 15 parts of pine bark and 10 parts of clay.

[0029] Crush them separately, pass through a 100-mesh sieve, mix evenly according to the weight part, control the moisture content at 48%, granulate (2-3 mm), dry at 105 °C, and roast at 600 °C for 5 h.

[0030] After sintering and cooling, the surface layer of the composite material is sprayed Pseudomonas denitrificans ATCC13867 bacteria solution and Acinetobacter johnsonii ATCC 17909 bacterial solution, and then sprayed with sodium alginate solution with a mass concentration of 3%, dried at low temperature, and the bacterial content of the composite material was 3.1×10 8 cfu / g.

[0031] in Pseudomonas denitrificans ATCC 13867 and Acinetobacter johnsonii The ratio of the bacteria amount of ATCC 17909 is 1:2.

Embodiment 2

[0033] A composite material for removing nitrogen and phosphorus in waste water comprises the following raw materials in parts by weight: 30 parts of iron tailing sand, 30 parts of steel slag, 20 parts of pine bark and 15 parts of clay.

[0034] Crush them separately, pass through a 100-mesh sieve, mix evenly according to the weight part, control the moisture content at 52%, granulate (2-3 mm), dry at 105 °C, and roast at 850 °C for 3 h.

[0035] After sintering and cooling, the surface layer of the composite material is sprayed Pseudomonas denitrificans ATCC13867 bacteria solution and Acinetobacter johnsonii ATCC 17909 bacteria solution, and then sprayed with sodium alginate solution with a mass concentration of 4%, dried at low temperature, and the bacteria content of the composite material was 2.5×10 8 cfu / g.

[0036] in Pseudomonas denitrificans ATCC 13867 and Acinetobacter johnsonii The ratio of the bacterial count of ATCC 17909 is 1:1.

Embodiment 3

[0038] A composite material for removing nitrogen and phosphorus in waste water comprises the following raw materials in parts by weight: 25 parts of iron tailing sand, 20 parts of steel slag, 30 parts of pine bark and 13 parts of clay.

[0039] Crush them separately, pass through a 100-mesh sieve, mix evenly according to the weight part, control the moisture content at 60%, granulate (2-3 mm), dry at 105 °C, and roast at 700 °C for 3 h.

[0040] After sintering and cooling, the surface layer of the composite material is sprayed Pseudomonas denitrificans ATCC13867 bacteria solution and Acinetobacter johnsonii ATCC 17909 bacterial solution, and then sprayed with sodium alginate solution with a mass concentration of 4%, dried at low temperature, and the bacterial content of the composite material was 2.3×10 8 cfu / g.

[0041] in Pseudomonas denitrificans ATCC 13867 and Acinetobacter johnsonii The ratio of the bacterial count of ATCC 17909 is 2:1.

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Abstract

The invention relates to a composite material for removing nitrogen and phosphorus in wastewater, which comprises composite particles containing Pseudomonas denitrificans ATCC 13867 and Acinetobacter johnsonii ATCC 17909; the composite particles include the following components in parts by weight: 25-45 parts of iron tailings, 15-30 parts of steel slag powder, 15-30 parts of pine bark powder and 10-15 parts of clay. The present invention also relates to a method for treating wastewater by using the above-mentioned composite material. The invention utilizes the composite material processed by solid waste iron tailings, steel slag, etc. to simultaneously remove nitrogen and phosphorus in wastewater, and the processed composite material can be used to make organic fertilizer or seedling substrate, and simultaneously realize wastewater treatment and solid waste The dual purpose of resourcing.

Description

technical field [0001] The invention belongs to the technical field of water body purification, and in particular relates to a composite material and method for removing nitrogen and phosphorus in wastewater. Background technique [0002] Due to the massive discharge of industrial, agricultural and domestic wastewater rich in N and P pollutants to rivers and lakes, it is very easy to cause eutrophication of water bodies and excessive growth of algae, thereby causing water quality to deteriorate. Water pollution not only affects the survival of aquatic organisms, but also exacerbates the tension of water resources, posing a serious threat to our lives. At present, my country's water environment is facing huge challenges, and the new "Water Ten Measures" also put forward stricter restrictions on the discharge concentration of nitrogen, phosphorus and other pollutants. [0003] At present, the methods for removing N and P in wastewater are mainly chemical and biological method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C05G3/40A01G24/10A01G24/17A01G24/20A01G24/42C02F1/28C02F101/30C02F101/38
CPCC02F3/34C02F1/281C05F7/00C05G3/00A01G24/10A01G24/17A01G24/20A01G24/42C02F2101/30C02F2101/38C05F11/00C05F11/08
Inventor 程辉彩习彦花何强吴健方楠
Owner BIOLOGY INST OF HEBEI ACAD OF SCI
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