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Physicochemical pretreatment-bio-enhanced treatment integrated process of primary explosive production wastewater

A bioaugmentation and waste water production technology, applied in the direction of biological water/sewage treatment, multi-stage water treatment, anaerobic digestion treatment, etc., can solve the problems of difficult to meet the requirements of biochemical water inflow, unable to regenerate, inactivate, etc., to achieve reduction Iron slime production and hydrogen peroxide consumption, cost saving, and the effect of stable and standard discharge

Active Publication Date: 2020-11-27
西藏高争民爆股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the waste water from the production of explosives is discharged directly without treatment, it will cause serious pollution to the environment.
[0003] At present, the detonating waste water is mainly treated by the combined process of "activated carbon adsorption-chemical precipitation-activated carbon adsorption", which consumes a lot of activated carbon and cannot be regenerated (Chen Tailin. Comprehensive treatment of lead stephenate wastewater. Water Pollution and Treatment, 2017, 05(01) :1-5.)
Using the combined process of "chemical precipitation-chemical oxidation-sequencing batch activated sludge-deep chemical oxidation" to treat primer wastewater, the problems of sludge loss and inactivation in the sequencing batch activated sludge system cannot be solved, and the addition of excessive oxidants causes The cost of wastewater treatment is high (Wang Yulong. Wastewater Treatment Design for Primary Explosive Production in Ordnance Industry. Water Industry Market, 2012(2):82-85.)
Using the "Fenton Oxidation-Chemical Precipitation" process to pretreat primer wastewater can effectively remove nitrophenols and Pb in wastewater 2+ ions, but the biological toxicity of the effluent of the pretreatment system is still high, and it is difficult to meet the requirements of biochemical influent water (Wang Yulong. Wastewater Treatment Design of Primary Explosive Production in Weapons Industry. Water Industry Market, 2012(2):82-85.)
In recent years, some primary explosive production enterprises have tried to use incineration technology to treat primary explosive wastewater, but problems such as deflagration of residual explosives and high energy consumption during the incineration process are difficult to solve

Method used

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  • Physicochemical pretreatment-bio-enhanced treatment integrated process of primary explosive production wastewater
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  • Physicochemical pretreatment-bio-enhanced treatment integrated process of primary explosive production wastewater

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Embodiment 1

[0030] Screening, isolation and identification of Enterobacter sp.NJUST15.

[0031] (1) Screening and isolation of strains

[0032] Take 5g of a sample from the existing activated sludge used for denitrification and denitrification, add it into 100mL of physiological saline, stir evenly, and let it stand for two hours. Take 1 mL of the supernatant and add it to the inorganic salt medium after high temperature sterilization at 121 °C, enrich and cultivate on a shaker at 180 rpm for three days, after three consecutive enrichments, take the culture solution and dilute it to 100% with sterile water. -4 -10 -10 times. To prepare the inorganic salt agar solid medium, spread 20 μL of the diluted culture solution on the inorganic salt agar solid medium, and place it in a biochemical incubator at 30° C. for three days. Select the single colonies with obvious differences on the petri dish, and use the method of plate streak separation to carry out purification and culture. After five...

Embodiment 2

[0043] Taking the mixed primer waste water from the production workshop of lead styphenate, lead azide, tetrazene and barium styphenate as an example, the COD concentration of the waste water ranges from 12000 to 14000mg / L, Pb 2+ The concentration range is 1100-1500mg / L, the concentration range of nitrophenols is 1000-1200mg / L, and the pH value is 2-3. "Internal electrolysis-Fenton-coagulation-sedimentation-anoxic denitrification-filter advanced treatment" combined process flow is as follows figure 1 shown.

[0044] In the internal electrolysis section, iron shavings are used as the zero-valent iron source, and the reduction of zero-valent iron under acidic conditions is used to realize the effective reduction of nitro compounds and simultaneously remove a certain amount of Pb 2+ ; In the Fenton oxidation section, hydrogen peroxide is directly added without additional ferrous ions, and the redox potential is controlled at 300-800mV to realize the oxidative degradation of poll...

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Abstract

The invention discloses an initiating explosive production waste water physicochemical pretreatment and biological enhancement treatment integration process, which comprises the following steps that waste water is firstly pumped into an inner electrolytic tank to realize the effective reduction of nitrocompound; the inner electrolysis outlet water enters a Fenton oxidation work section; iron ironsin the electrolysis outlet water are utilized; hydrogen peroxide is fed; organic matters and nitrine are removed; the Fenton outlet water enters a coagulation-sedimentation tank; iron ions in the Fenton outlet water are used as coagulation agents; polyacrylamide is used as a coagulant aids to remove Pb<2+> and organic matters; the sedimentation tank outlet water enters an anoxic reaction tank inwhich composite bacterium agents of NJUST-S1 is added; nitrate nitrogen in the waste water is used for denitrification so as to remove COD; outlet water in the anoxic tank is pumped into an biologicalaerated filter in which composite bacterium agents of NJUST-S2 is added; the standard reaching discharge is realized. The electrolysis-Fenton coupling technology is used; the iron mud generating quantity and the hydrogen peroxide consumption quantity are reduced; meanwhile, on the basis of the biological enhancement technology of the composite bacterium agents of NJUST-S1 and NJUST-S2, the wastewater treatment cost is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to an integrated process of physicochemical pretreatment-biologically enhanced treatment of primer production wastewater. Background technique [0002] The main pollution factors of primary explosive production wastewater are nitrophenols, Pb 2+ Ions, N 3 - Ions, etc., are priority control pollutants. Lead can accumulate in humans, animals and plants, and the main toxic effects are anemia, nervous dysfunction and kidney damage. Long-term exposure to nitrophenols can cause symptoms such as headache, nausea, vomiting, loss of appetite, diarrhea and fever, and can cause peripheral neuritis, liver and kidney damage. Azide compounds can inhibit the activity of cytochrome oxidase, resulting in abnormal phosphorylation and cellular respiration; the acute toxic effect is to cause an extreme decrease in vascular tension, which can stimulate breathing and enhance cardiac power;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/16C02F101/20
CPCC02F1/461C02F1/4672C02F1/56C02F1/722C02F1/725C02F3/02C02F3/28C02F3/34C02F9/00C02F2101/16C02F2101/20C02F2201/007C02F2301/08
Inventor 沈锦优江心白王静王连军马方平邱伟雷波王宁刘晓东李健生韩卫清孙秀云
Owner 西藏高争民爆股份有限公司