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Treatment method of nitro-nitrate-based explosive wastewater

A treatment method and technology for explosive wastewater, applied in water/sewage treatment, biological water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problem of high treatment costs, effluent indicators that cannot meet national discharge requirements, and high labor intensity And other issues

Inactive Publication Date: 2020-04-24
SHANXI BEIHUA GUANLYU CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, industrial wastewater from propellants and explosives is mainly treated by physical and chemical methods such as adsorption, chemical oxidation, coagulation precipitation, extraction, evaporation-incineration, neutralization and electrolysis, which have the disadvantages of complex process and high treatment costs.
Among them, nitro-nitrate-based explosives mainly use activated carbon adsorption to remove pollutants in wastewater. However, activated carbon is not easy to regenerate after adsorption and saturation, and needs to be replaced frequently. The indicators cannot meet the increasingly stringent national emission requirements

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  • Treatment method of nitro-nitrate-based explosive wastewater
  • Treatment method of nitro-nitrate-based explosive wastewater

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Experimental program
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Effect test

Embodiment 1～6

[0049] Put the nitro-nitrate-based explosive waste water (the water quality is as in the "raw water" column in Table 1) into the regulating tank for homogeneous and uniform quantity, and the homogeneous and uniform quantity of effluent water quality is: COD: 4000 ~ 5000mg / L , pH value: 1-3; then adjust the pH value of the homogeneous and even amount of effluent in the neutralization tank to 4-5; the effluent of the neutralization tank is mixed with nutrients in the intermediate tank to obtain wastewater to be biochemically treated; the nutrient The substance is glucose, and the carbon-nitrogen ratio of the wastewater to be biochemically treated is 14:1;

[0050] Pass the wastewater to be biochemically treated into an upflow anaerobic sludge bed reactor for anaerobic treatment, wherein the sludge content in the upflow anaerobic sludge bed reactor is maintained at 40-60g / L, and the temperature The temperature is 22°C, and the residence time in the upflow anaerobic sludge bed rea...

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Abstract

The invention provides a treatment method of nitro-nitrate-based explosive wastewater, and belongs to the technical field of explosive wastewater treatment. The treatment method comprises the following steps: homogenizing and averaging the nitro-nitrate-based explosive wastewater, adjusting the pH value to 4-5, and then mixing with nutrient substances to obtain wastewater to be biochemically treated; sequentially carrying out anaerobic treatment, denitrifying treatment and aerobic treatment on the wastewater to be biochemically treated, and enabling the aerobically treated effluent to pass through an MBR (membrane bioreactor) to obtain biochemically treated wastewater; and precipitating the biochemical treatment wastewater, and performing activated carbon adsorption to obtain purified water. Physicochemical and biological treatment technologies are combined, the process is reasonable, the operation is safe, the operation cost is low, the impact resistance and the operability are good,and the problems of high COD concentration, high treatment difficulty, high operation cost and high operation labor intensity of the nitro-nitrate explosive wastewater are effectively solved.

Description

technical field [0001] The invention relates to the technical field of explosive wastewater treatment, in particular to a treatment method for nitro-nitrate-based explosive wastewater. Background technique [0002] The wastewater generated during the production of nitro-nitrate-based explosives mainly includes acidic wastewater diluted and filtered after nitrification, weakly alkaline wastewater generated during pre-washing and cooking, and solvent-containing wastewater generated by product recrystallization and filtration. Wastewater mainly includes nitric acid, hypochlorous acid, magnesium nitrate, sodium nitrate, DEA (2,6-diethylaniline), DINA (diisononyl adipate), sodium carbonate, alcohol, acetone and other pollutants. It has the characteristics of high concentration of nitro compounds, high concentration of COD, high acidity, and difficult treatment. [0003] At present, the waste water of explosives industry is mainly treated by physical and chemical methods such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16C02F101/30
CPCC02F1/283C02F1/66C02F3/1268C02F3/1278C02F3/2846C02F3/30C02F9/00C02F2101/003C02F2101/163C02F2101/30
Inventor 毋文莉刘胜琦张芬谢利鹏苗菲侯鹤
Owner SHANXI BEIHUA GUANLYU CHEM IND
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