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Method for treating energetic material synthetic wastewater

A treatment method, waste water technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of reducing treatment costs, wide application range, and reducing process investment

Inactive Publication Date: 2014-04-02
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, for the treatment of synthetic wastewater from energetic materials, there is no report on a cheap and easy-to-scale biological treatment method, and it is imminent to find an efficient and practical treatment method for synthetic wastewater from energetic materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the treatment method of the present invention, this embodiment treats the TNAZ synthetic wastewater of Xi'an Institute of Modern Chemistry. Wastewater indicators: chromaticity: 80 times, suspended solids: 65mg / L, pH: 2.41, COD: 120000mg / L, BOD 5 : 27652mg / L, the main salt - sodium acetate, ammonium acetate content: 1100mg / L, 760mg / L, TNAZ: 2050mg / L.

[0028] a. Neutralization treatment before Fenton reaction: Add industrial grade calcium hydroxide in 3 batches continuously to the wastewater to adjust its pH=3 to meet the requirements of Fenton oxidation treatment, and filter to remove calcium sulfate solids. Calcium hydroxide is industrial grade, and the purpose of adding in batches is to prevent the reaction from exothermic sharply.

[0029] b. Fenton oxidation reaction: Add the filtered pH=3 wastewater into the Fenton reactor, add ferrous sulfate heptahydrate to it, and add hydrogen peroxide dropwise, adjust the pH value of the reaction mixture to 3.6, a...

Embodiment 2

[0040] According to the treatment method of the present invention, this embodiment treats the DNTF synthetic wastewater of Xi'an Institute of Modern Chemistry. Wastewater indicators: chromaticity: 200 times, suspended solids: 500mg / L, C H+ : 1.12mol / L, COD: 26340mg / L, BOD 5 : 4480mg / L, total salt content: 215000mg / L, characteristic dangerous substances are nitrogenous compounds such as DAOF, content: 1150mg / L.

[0041] a. Neutralization treatment before Fenton reaction: Add industrial grade calcium hydroxide to the wastewater in 3 batches to adjust its pH=3.5, and pump it to a suction filter to remove calcium sulfate solids by filtration. The indicators of the obtained wastewater: chromaticity: 400 times, suspended solids: 40mg / L, pH: 3.6, COD: 24980mg / L, BOD 5 : 6160mg / L, total salt content: 75000mg / L, characteristic dangerous substance content: 1150mg / L.

[0042] b. Fenton oxidation and post-reaction neutralization and separation treatment: pH=3.5 wastewater is pumped int...

Embodiment 3

[0046] According to the treatment method of the present invention, this embodiment treats the BuAENA synthetic wastewater of Xi'an Institute of Modern Chemistry. The processing mode of this embodiment is the same as that of Embodiment 1. Wastewater indicators: chromaticity: 40 times, suspended solids: 56mg / L, pH: 1.75, COD: 40000mg / L, BOD 5 : 9689mg / L, total salt content: 17669mg / L, specific hazard (BuAENA): 860mg / L. According to the method and steps of Example 1 for processing and testing, the indicators of the effluent are: chromaticity 0 times, suspended solids 10mg / L, pH=7.88, COD=108mg / L, BOD 5 45.23mg / L, total salt content 1800mg / L, no characteristic dangerous substances detected. Achieve wastewater discharge standards.

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Abstract

The invention discloses a method for treating energetic material synthetic wastewater, belonging to the field of environmental protection. The method for treating the energetic material synthetic wastewater comprises the steps of a, performing neutralizing treatment before a Fenton reaction; b, performing the Fenton oxidization reaction, namely adding a ferrous salt into filtered wastewater, and dropwise adding oxydol to perform catalytic oxidation reaction under the reaction condition that the temperature is 20-70 DEG C, the pH value is 3-4, the mole ratio of H2O2 to COD is 3:1 to 2:1, the mole ratio of Fe<2+> to H2O2 is 1:7 to 1:8, the reaction time is 4-6 h, and the inlet water COD is 5000-120000 mg / L; c, performing neutralizing treatment after the Fenton reaction; d, performing solid-liquid separation; e, performing facultative anaerobe degradation; and f, performing aerobic degradation. The method can be used for treating various types of energetic material synthetic wastewater, and particularly has good performance on treatment of characteristic nitro-sulfuric acid wastewater; the method is suitable for wastewater with a wide range of indexes and salt contents that the COD is 500-120000 mg / L, and the total salt content is 1000-220000 mg / L.

Description

field of invention [0001] The invention belongs to the field of environmental protection, and in particular relates to a method for treating waste water synthesized by energetic materials. Background technique [0002] The production of explosives is accompanied by a large amount of wastewater discharge. In recent years, with the research and development of new single-substance explosives and the industrialization of energetic materials such as DNTF, ADN, and TNAZ, the amount of wastewater in the explosives industry has also increased sharply and must be treated in a targeted manner. . [0003] The wastewater produced during the synthesis of energetic materials (such as TNAZ, DNTF, BuNENA, etc.) has the characteristics of high chemical oxygen demand (COD), strong acidity, high salinity and contains special hazardous substances. At present, there are reports on wastewater treatment methods for high-COD, high-salt or high-acid alone, but there is no good treatment method for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 葛忠学朱勇咸漠李普瑞陈涛冯德鑫赵国明
Owner XIAN MODERN CHEM RES INST
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