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Treatment method of ADN production wastewater

A technology for the production of wastewater and treatment methods, applied in the field of nanomaterials and nanomaterials, can solve the problems of slow microbial degradation rate, high toxicity inhibition, secondary pollution of iron sludge, etc., and achieve the elimination of safety impact, convenient operation and simple process Effect

Inactive Publication Date: 2019-12-24
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although physical treatment technologies such as adsorption and flocculation are simple and cost-effective, they are less effective in removing energetic compounds such as ADN; The oxidative degradation effect is poor and there is a secondary pollution problem of iron sludge; the biological treatment technology is safe to operate, low in operating costs, and can achieve complete mineralization of pollutants, but there are microorganisms with low tolerance to ADN. When the residual ADN concentration exceeds 2mg / L At the same time, the toxicity of ADN to microorganisms is greatly inhibited, and the microbial degradation rate is slow, which cannot meet the actual industrial needs.

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  • Treatment method of ADN production wastewater
  • Treatment method of ADN production wastewater

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specific Embodiment approach 1

[0021] Specific embodiment 1: process method of the present invention handles ADN production waste water

[0022] First, add ADN production wastewater into the photocatalytic reaction container, the total amount of wastewater is 200mL, and use a 600W ultraviolet lamp with a wavelength of 365nm to irradiate for 6h to obtain photochemically pretreated wastewater. The ADN content in the wastewater is 1.28mg / L;

[0023] Then, add dilute sulfuric acid solution to the wastewater after photochemical pretreatment to adjust the pH to 3, and then add 10% mass fraction of heterogeneous Fenton catalyst Fe to the photocatalytic reaction vessel. 2 o 3 , and then slowly and continuously drip the hydrogen peroxide with a mass-volume concentration of 30%. The ratio of the input amount of hydrogen peroxide in 1L of ADN production wastewater to the value of COD is 1:1, that is, add 179 mg of hydrogen peroxide to 1L of ADN production wastewater to complete the dropwise addition Continue to react...

specific Embodiment approach 2

[0027] Specific embodiment 2: Only use ultraviolet photocatalytic treatment of ADN production wastewater

[0028] Add ADN production wastewater into the photocatalytic reaction container, the total amount of wastewater is 200mL, and there are 6 groups in total. Each group uses 100W, 200W, 400W, 600W, 800W, and 1000W ultraviolet lamps with a wavelength of 365nm to irradiate for 6 hours, and 6 groups are obtained. The water quality of the 6 groups of wastewater after pretreatment with different power ultraviolet lamps is as follows:

[0029]

[0030] It can be seen from the above table that only using ultraviolet photochemical method can only significantly reduce the concentration of ADN, but the degradation effect on organic pollutants in wastewater is poor.

specific Embodiment approach 3

[0031] Specific embodiment 3: only using heterogeneous Fenton catalytic treatment of ADN production wastewater

[0032] Add ADN production wastewater into the photocatalytic reaction container, the total amount of wastewater is 200mL, a total of 3 groups, each group adjusts the pH value of the wastewater to 3, and each group adds 10% heterogeneous Fenton catalyst Fe 2 o 3 , Fe 3 o 4 and FeOOH, and then each group slowly and continuously drips hydrogen peroxide with a mass-volume concentration of 30%, that is, the ratio of hydrogen peroxide input to COD in 1L of ADN production wastewater is 1:1, that is, 179mg is added to 1L of ADN production wastewater After the hydrogen peroxide was added dropwise, the reaction was continued for 24 hours, and three groups of wastewater treated with different types of heterogeneous Fenton catalysts were obtained respectively. The water quality is as follows:

[0033]

[0034] It can be seen from the above table that only using the hetero...

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Abstract

The invention discloses a treatment method of ADN production wastewater, and belongs to the technical field of nano materials. The method solves the problem of poor removal effect of energetic compounds such as ADN and organic matters in the existing ADN production wastewater treatment method. The ADN production wastewater treatment process comprises an ultraviolet photochemical method, a heterogeneous Fenton oxidation method and a distillation desalination method. The process achieves accurate treatment on the basis of the water quality characteristics of ADN production wastewater, accordingto the method, ultraviolet photochemical treatment and heterogeneous Fenton technologies are combined, and the concentration of the energetic material in the wastewater can be completely removed whileorganic pollutants in the wastewater are greatly reduced, so that the treatment effect is better than that of a single ultraviolet photochemical method and a heterogeneous Fenton oxidation method, and the safety influence of the energetic material on the subsequent treatment process is eliminated; and finally, resource recycling of salt is achieved through evaporation and concentration.

Description

technical field [0001] The invention relates to a method for treating waste water produced by ADN, and belongs to the technical field of nanomaterials and nanomaterials. Background technique [0002] The molecular formula of ammonium dinitramide (ADN) is NH 4 N(NO 2 ) 2 , without carbon and chlorine in the molecule, high energy density, good high temperature stability, as a propellant, combustion does not produce smoke, it is one of the most promising alternative oxidants in composite propellants. However, the ADN production process will produce a large amount of waste water. Wastewater mainly consists of high-concentration inorganic salts such as ammonium nitrate and ammonium sulfate and low-concentration organic pollutants, among which ADN is a toxic substance. If appropriate prevention and control measures are not taken, it will cause serious pollution to the local environment. [0003] The existing ADN production wastewater treatment technologies mainly include physi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01C1/18C02F103/36C02F101/30C02F101/16
CPCC01C1/18C02F1/048C02F1/32C02F1/58C02F1/66C02F1/722C02F9/00C02F2101/101C02F2101/16C02F2101/163C02F2101/30C02F2103/36C02F2209/06C02F2209/08C02F2305/026
Inventor 梁凤兵冯德鑫咸漠
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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