Advanced treatment device for nitrogen-containing heterocyclic ring compound chemical tail water and combination technology thereof

A nitrogen heterocyclic compound and combined process technology, which is applied in the directions of oxidized water/sewage treatment, electrochemical water/sewage treatment, water/sewage treatment, etc. Stable and efficient degradation effect

Active Publication Date: 2016-05-25
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the low removal efficiency of the treatment process of nitrogen-containing heterocyclic compound chemical tail water in the prior art, the present invention provides an advanced treatment device for nitrogen-containing heterocyclic compound chemical tail water and its combin

Method used

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  • Advanced treatment device for nitrogen-containing heterocyclic ring compound chemical tail water and combination technology thereof
  • Advanced treatment device for nitrogen-containing heterocyclic ring compound chemical tail water and combination technology thereof
  • Advanced treatment device for nitrogen-containing heterocyclic ring compound chemical tail water and combination technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The combined process of electrochemical oxidation-biological aeration filter-electrodialysis was used to treat the tail water of pesticide production containing tricyclazole (TC).

[0039] Influent COD=234.80mg / L, tricyclazole concentration 178.47mg / L, pH=7.2, SS=850mg / L in tail water containing tricyclazole (TC) pesticide.

[0040] Step 1. The tail water is pretreated by an electrochemical oxidation method. About 8 cubic meters of tail water is injected into the reaction tank, the electrode reactor is submerged, the aeration pipeline switch is turned on for aeration, the DC power supply is turned on, the constant current is controlled at 260A, and the voltage is 3.4V. Then turn on the high-pressure water pump switch, set the high-pressure water pump to work once every 20 minutes, and work once every 5 minutes. The distance between the cathode and anode of the electrochemical oxidation reactor is 1 cm. The nitrogen-containing heterocyclic compound in the wastewater und...

Embodiment 2

[0048] The tail water containing propiconazole (PPC) pesticide was treated by electrochemical oxidation-biological aeration filter-electrodialysis.

[0049] Influent COD=258.70mg / L, propiconazole concentration 41.15mg / L, pH=7.3, SS=960mg / L in tail water containing propiconazole (PPC) pesticide production.

[0050] Step 1. The tail water is pretreated by an electrochemical oxidation method. About 9 cubic meters of tail water is injected into the reaction tank, the electrode reactor is submerged, the aeration pipeline switch is turned on for aeration, the DC power supply is turned on, and the constant current is controlled at 210A and the voltage is 3.0V. Then turn on the high-pressure water pump switch, set the high-pressure water pump to work once every 30 minutes, and work once every 10 minutes. The distance between the cathode and anode of the electrochemical oxidation reactor is 2 cm. The nitrogen-containing heterocyclic compound in the wastewater undergoes an instantaneou...

Embodiment 3

[0056] Electrochemical oxidation-biological aeration filter-electrodialysis was used to treat the tail water containing triazole (Tz) pesticides.

[0057] Influent COD=249.63mg / L, triazole concentration 72.10mg / L, pH=7.5, SS=950mg / L in tail water of pesticide production containing triazole (Tz).

[0058] Step 1. The tail water is pretreated by an electrochemical oxidation method. About 10 cubic meters of tail water is injected into the reaction tank, the electrode reactor is submerged, the aeration pipeline switch is turned on for aeration, the DC power supply is turned on, the constant current is controlled at 300A, and the voltage is 3.9V. Then turn on the high-pressure water pump switch, set the high-pressure water pump to work once every 10 minutes, and work once every 8 minutes. The distance between cathode and anode of the electrochemical oxidation reactor is 3 cm. The nitrogen-containing heterocyclic compound in the wastewater undergoes an instantaneous electrochemical...

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Abstract

The invention discloses an advanced treatment device for nitrogen-containing heterocyclic ring compound chemical tail water. The advanced treatment device sequentially consists of an electrochemical oxidation device, a biological aeration filter device and an electrodialysis device, wherein an electrochemical oxidation reactor consists of a microporous tube type membrane electrode of a titanium substrate ruthenium dioxide coating serving as an anode and a matching perforated stainless steel cathode. The invention also discloses an advanced treatment combination technology for the nitrogen-containing heterocyclic ring compound chemical tail water. According to the advanced treatment combination technology, electrochemical oxidation is combined with the membrane separation technology to form an electromembrane coupling technology; and the biological aeration filter is used for degrading organic matters and performing electrodialysis desalination, optimized linking of the treatment technologies at the sections is realized, thus the wastewater treatment technology has the best effect, the organic content COD of the final yielding water is less than or equal to 50mg/L, and the electric conductivity is lower than or equal to 10muS/cm. By adopting the device disclosed by the invention, advanced treatment of most nitrogen-containing heterocyclic ring chemical tail water can be realized; the technology has the advantages of fast reaction, stable operation, no pollution, wide application range and low cost; and the treated wastewater can reach the recycling standard.

Description

technical field [0001] The invention belongs to the technical field of wastewater advanced treatment technology, and relates to an advanced treatment device for nitrogen-containing heterocyclic compound chemical industry tail water and a combined process thereof. Background technique [0002] Nitrogenous Heteraromatic Compounds (NHCs) are a class of refractory toxic and harmful organic compounds, mainly including pyrrole, cyclic azole, pyridine, pyrimidine, quinoline, and purine. They are intermediates widely used in fine chemical industries such as medicine, pesticides, and dyes. body, raw material or product. The fine chemical wastewater produced by the production of NHCs will generally remain nitrogen heterocyclic refractory pollutants in the effluent after secondary biochemical treatment, and will remain for a long time when discharged into the external environmental water body, bringing ecological risks and ecological hazards. [0003] At present, the wastewater treatm...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F1/72C02F9/14C02F101/38
CPCC02F1/4672C02F1/4693C02F3/02C02F9/00C02F2101/38
Inventor 韩卫清崔韬张永昊王连军孙秀云李健生刘晓东沈锦优
Owner NANJING UNIV OF SCI & TECH
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