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A kind of advanced treatment system and method of high nitrate wastewater

A technology for advanced treatment and wastewater treatment, applied in chemical instruments and methods, multi-stage water/sewage treatment, biological water/sewage treatment, etc. removal, etc.

Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The relevant patent chemical reduction has no catalyst and low efficiency; there is no nitrification by aerobic microorganisms, and the NH produced during the nitrate reduction process 4 + Cannot be removed, resulting in the effluent not being discharged or reused up to the standard

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  • A kind of advanced treatment system and method of high nitrate wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A fertilizer manufacturing plant produces wastewater, which enters the catalytic reactor 1 from the wastewater inlet 6, and the NO in the wastewater 3 2- The content is 532mg / L, NH 4 + The content is 150mg / L, the COD content is 1200mg / L, and the pH is 7.0;

[0045] The processing method of the advanced treatment system of high nitrate wastewater, the steps are as follows:

[0046] a) The reducing agent formic acid and nitrate in the waste water are passed into the catalytic reactor 1 in a molar ratio of 4:1, and the waste water stays for 30 minutes to obtain treated water; the catalyst layer 5 is composed of a catalyst, and the carrier of the catalyst is γ - Alumina or activated carbon, the effective components are metal oxides of Pd and Cu;

[0047] b) Input the water treated in step a) into the aerobic bioreactor 2, the nitrification sludge concentration in the aerobic bioreactor 2 is 3000mg / L, and the wastewater residence time is 15 hours to obtain the treated wa...

Embodiment 2

[0052] A feed production plant produces waste water, which enters the catalytic reactor 1 from the waste water inlet 6, and the NO in the waste water 3 2- The content is 112mg / L, NH 4 + The content is 80mg / L, the COD content is 500mg / L, and the pH is 6.6;

[0053] The processing method of the advanced treatment system of high nitrate wastewater, the steps are as follows:

[0054] a) Pass the reducing agent formic acid and nitrate in the wastewater into the catalytic reactor 1 at a molar ratio of 5:1, and the wastewater stays for 60 minutes to obtain treated water; the catalyst layer 5 is composed of a catalyst, and the carrier of the catalyst is γ- Alumina or activated carbon, effective components are oxides of metal Pd and Cu;

[0055] b) Input the water treated in step a) into the aerobic bioreactor 2, the nitrification sludge concentration in the aerobic bioreactor 2 is 4500mg / L, and the wastewater residence time is 30 hours to obtain the treated water;

[0056] c) Inp...

Embodiment 3

[0060] A feed production plant produces waste water, which enters the catalytic reactor 1 from the waste water inlet 6, and the NO in the waste water 3 2- The content is 10250mg / L, NH 4 + The content is 256mg / L, the COD content is 4500mg / L, and the pH is 6.0;

[0061] The processing method of the advanced treatment system of high nitrate wastewater, the steps are as follows:

[0062] a) Pass the reducing agent formic acid and nitrate in the wastewater into the catalytic reactor 1 at a molar ratio of 3:1, and the wastewater stays for 20 minutes to obtain treated water; the catalyst layer 5 is composed of a catalyst, and the carrier of the catalyst is γ- Alumina or activated carbon, effective components are oxides of metal Pd and Cu;

[0063] b) Input the water treated in step a) into the aerobic bioreactor 2, the nitrification sludge concentration in the aerobic bioreactor 2 is 2500mg / L, and the residence time of the wastewater is 10 hours to obtain the treated water;

[0...

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Abstract

The invention discloses a deep treatment system and method for high-nitrate-content wastewater, and belongs to the technical field of wastewater treatment. A catalytic reactor (1) is filled with a catalyst layer (5); a wastewater inlet (6) and a reducing agent inlet (7) are formed in the bottom of the catalytic reactor (1); a wastewater outlet (8) is formed in the top of the catalytic reactor (1);the wastewater outlet (8) is connected with an aerobic bioreactor (2) through a first peristaltic pump (101); the liquid discharging end of the aerobic bioreactor (2) is connected with an anaerobic bioreactor (3) through a second peristaltic pump (102); the liquid discharging end of the anaerobic bioreactor (3) is connected with a sedimentation tank (4) through a third peristaltic pump (103); a water drainage opening (9) is formed in the sedimentation tank (4). The system is simple in structure and high in practicability. The method can treat high-concentration nitrate wastewater; adverse effect of the high-concentration nitrate wastewater on biological denitrification in a treatment process is avoided; effluent is relatively low in COD content and nitrogen content, and can meet the emission standard.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an advanced treatment system and method for high-nitrate wastewater. Background technique [0002] Wastewater containing high concentrations of nitrate has a wide range of sources and complex components, such as fertilizer manufacturing, steel production, gunpowder manufacturing, feed production, meat processing, electronic components, and flue gas denitrification absorption liquid, etc. After nitrate is ingested into human and animal bodies , partly will be reduced to nitrite. Nitrite can oxidize the hemoglobin in the blood to ferric hemoglobin, which does not have the ability to bind oxygen. When the content of ferric hemoglobin in the blood increases, the ability of the blood to transport oxygen decreases. In severe cases, it will lead to purple plague in human tissues. It is called hyperferritinemia. In addition, nitrite ions can also cause blue blo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F1/70C02F3/302C02F9/00C02F2001/007C02F2101/163
Inventor 邹宗海李波刘婷婷潘咸峰
Owner CHINA PETROLEUM & CHEM CORP