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A device and method for degrading ammonium perchlorate wastewater by hydrothermal combined biological method

An ammonium perchlorate, combined biological technology, applied in the methods of using microorganisms, biochemical equipment and methods, microorganisms, etc., to achieve the effect of reducing operating costs and reducing environmental pollution loads

Active Publication Date: 2022-02-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of biological treatment, it is necessary to consider providing sufficient electron donors for the microbial system. At present, the selection of electron donors adopts the method of external dosing, and further evaluation and improvement are needed in terms of economic rationality and process operability.

Method used

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  • A device and method for degrading ammonium perchlorate wastewater by hydrothermal combined biological method

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Embodiment 1

[0057] A method of hydrothermal combined biological method for degrading ammonium perchlorate wastewater according to the embodiment of the present invention comprises the following steps:

[0058] Step 1, mixing Fe(0) and ammonium perchlorate waste water, adjusting the pH of the reaction system to acidic conditions, carrying out the first-order reduction degradation of ammonium perchlorate, and obtaining the ammonium perchlorate hydrothermal solution after the first-order degradation;

[0059] Step 2, cooling the ammonium perchlorate hydrothermal solution after the primary degradation obtained in step 1, to obtain the cooled ammonium perchlorate hydrothermal solution;

[0060] In step 3, the cooled ammonium perchlorate hydrothermal solution obtained in step 2 is subjected to secondary degradation by the biological method, and discharged after the treatment reaches the standard; wherein, the supernatant of the stage of hydrolysis and fermentation of food waste and landfill leac...

Embodiment 2

[0064] The difference between the embodiment of the present invention and embodiment 1 is that in step 1, ammonium perchlorate wastewater is subjected to primary reduction degradation under high temperature and pressure conditions; wherein, the high temperature value is 200°C, and the pressure value is 1.554Mpa ; In step 2, the cooling temperature is 37°C during cooling; the successfully domesticated ammonium perchlorate reducing bacteria are inoculated into the secondary degradation unit of the biological method, and the inoculum amount is equal to 5% of the substrate.

Embodiment 3

[0066] The difference between the embodiment of the present invention and embodiment 1 is that in step 1, ammonium perchlorate wastewater is subjected to primary reduction degradation under high temperature and pressure conditions; wherein, the high temperature value is 210°C, and the pressure value is 1.906Mpa; In step 2, the cooling temperature is 36° C.; the ammonium perchlorate-reducing bacteria that have been successfully acclimatized are inoculated into the secondary degradation unit of the biological method, and the inoculum amount is equal to 5% of the substrate.

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Abstract

The invention discloses a device and method for degrading ammonium perchlorate waste water by hydrothermal combined biological method. Mix wastewater, adjust the pH of the reaction system to acidic conditions, and perform the first-order reduction degradation of ammonium perchlorate; the hydrothermal liquid cooling unit is used to cool the ammonium perchlorate hydrothermal liquid after the first-level degradation; the second-level biological method The degradation unit is used to degrade the cooled ammonium perchlorate hydrothermal solution twice by biological method, and discharge it after the treatment reaches the standard; among them, the supernatant of the hydrolysis and fermentation stage of food waste and landfill leachate is used as the electron donor, The source of carbon and trace elements, the inoculum mud comes from the domestication stage of ammonium perchlorate reducing bacteria. The invention can remarkably improve the removal effect of high-concentration ammonium perchlorate wastewater, and at the same time significantly improve the economical rationality and process operability of the process of biologically removing ammonium perchlorate wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental chemistry and biology, relates to the technical fields of hydrothermal treatment and perchlorate biological reduction method, and particularly relates to a device and method for degrading ammonium perchlorate wastewater by hydrothermal combined biological method. Background technique [0002] With the rapid development of national defense in various countries, the replacement cycle of weapons is shortened, and the number of decommissioned ammunition waste products is gradually increasing. In order to avoid potential safety hazards during storage, these waste explosives and propellants must be disposed of in a timely and effective manner. As a strong oxidant, ammonium perchlorate (AP) is widely used in aerospace and military industries such as rocket solid propellants, missile fuels, and blasting explosives, and has become an important component of explosives and solid propellants. In perchlo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C12N1/36C12N1/00C02F101/12C02F101/16
CPCC02F9/00C12N1/36C12N1/00C02F2101/12C02F2101/16C02F1/70C02F3/30
Inventor 高宁博程丽杰全翠
Owner XI AN JIAOTONG UNIV
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