Process for treating organic wastewater

A technology for organic wastewater treatment and organic wastewater treatment, applied in water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effects of simple preparation process, uniform reaction, and efficient and fast catalytic reaction

Inactive Publication Date: 2019-04-12
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to develop an efficient treatment process for ammonia-nitrogen-containing organic wastewater. This technology has strong versatility and can be applied to organic wastewater generated by sulfur recovery, natural gas desulfurization and other devices, and solves the environmental protection problems caused by the direct discharge of ammonia-nitrogen wastewater. Closely related to the development of Sinopec's main business, it has broad application prospects in the Sinopec system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0018] Containing methyldiethanolamine and methylethanolamine organic wastewater COD content is 100000mg / L, wastewater and catalyst (cerium-zirconium molar ratio is 9:1 in the carrier, impregnation I 3 The mass ratio of Ru to the carrier is 4%, calcined at 200°C for 15h at high temperature), the liquid-solid ratio is 10:1, pure oxygen is introduced, the reaction temperature is 200°C, the pressure is 4MPa, and the reaction is stirred for 2h; the COD removal rate of wastewater reaches 83.0% .

Embodiment example 2

[0020] The COD content of organic wastewater containing dimethylmethanolamine and ethanolamine is 20000mg / L, and the wastewater and catalyst (the molar ratio of cerium and zirconium in the carrier is 4:6, H 2 PtCl 6 The mass ratio to the carrier is 1%, high-temperature calcination at 500°C, 2h) the liquid-solid ratio is 50:1, air is introduced, the reaction temperature is 180°C, the pressure is 8MPa, and the reaction is stirred for 1h; the COD removal rate of wastewater reaches 76.0%.

Embodiment example 3

[0022] The COD content of organic wastewater containing methylethanolamine is 5000mg / L, and the wastewater and catalyst (the molar ratio of cerium and zirconium in the carrier is 5:5, impregnated with RuCl 3 The mass ratio to the carrier is 5%, high-temperature calcination at 300°C, 5h) the liquid-solid ratio is 10:1, pure oxygen is introduced, the reaction temperature is 220°C, the pressure is 5MPa, and the reaction is stirred for 4h; the COD removal rate of wastewater reaches 95.0%.

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PUM

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Abstract

The invention relates to a process for treating organic wastewater. The process is characterized in that the organic wastewater containing ammonia nitrogen adopts a material obtained by impregnating aPt or Ru metal salt on a cerium-zirconium oxide carrier as a catalyst, and oxidative degradation is performed in a pure oxygen or air atmosphere to remove COD, wherein a liquid-solid ratio of a volume of the wastewater to a mass of the catalyst is (10-50):1 ml/g, the reaction temperature is 180-220 DEG C, the pressure is 3-8 MPa, and the reaction time is 1-4 h. The process provided by the invention is a method used for reducing the COD in the organic wastewater, the treatment temperature and pressure are obviously reduced, after treatment is performed, the removing rate of the COD in the organic wastewater can reach 70%, and the biodegradability of the organic wastewater containing the ammonia nitrogen is greatly improved.

Description

technical field [0001] The invention relates to the fields of chemical industry and environmental protection, in particular to a process for treating organic wastewater, in particular to a method for preparing a metal oxide catalyst and a method for reducing COD in organic wastewater. Background technique [0002] At present, the treatment of MDEA organic wastewater in petrochemical enterprises mainly adopts centralized collection, which is mixed with other production wastewater for aerobic biochemical treatment. Due to the limitation of the load of the treatment device and the slow degradation rate of MDEA microorganisms, it is necessary to dilute the organic wastewater with a large amount of water before entering the biochemical treatment device, resulting in a substantial increase in the amount of sewage, a heavier load on the biochemical device, and an increase in treatment costs. Especially for the petrochemical industry, the use of MDEA amine liquid to absorb the hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/74C02F101/38
CPCC02F1/725C02F1/727C02F1/74C02F2101/38
Inventor 王海燕魏源崔群刘宗健
Owner NANJING UNIV OF TECH
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