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Reactor for degrading oxidative pollutants in water body by using microorganisms

A microbial degradation and reactor technology, applied in biological water/sewage treatment, polluted groundwater/leachate treatment, chemical instruments and methods, etc., can solve the problems of secondary pollution of water bodies, increase costs, etc., and alleviate the impact load , easy to fall off, easy to buy and replace

Inactive Publication Date: 2017-06-09
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to achieve the purpose of biological reduction, it is necessary to add additional carbon sources such as methanol, ethanol, etc., which not only increases the cost, but also easily causes secondary pollution of water bodies

Method used

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  • Reactor for degrading oxidative pollutants in water body by using microorganisms
  • Reactor for degrading oxidative pollutants in water body by using microorganisms
  • Reactor for degrading oxidative pollutants in water body by using microorganisms

Examples

Experimental program
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Effect test

Embodiment 1

[0044] In this embodiment, a device with an effective volume of 1.8 L, an inner diameter of the reactor main body 20 of 700 mm, and a height of 500 mm is used. The hollow fiber membranes 19 are commercially available PVC hollow fiber membranes 19, with an outer diameter of 1.66 mm, an inner diameter of 1 mm, and a membrane pore diameter of 0.02 μm. There are 60 hollow fiber membranes 19 in total for each membrane module (120 are formed after bending). The aeration hydrogen partial pressure is 0.04MPa. Pump the prepared simulated wastewater (pH=7.0-7.5) containing 1mg / L Cr(Ⅵ) and inorganic carbon and nitrogen sources into the reactor main body 20 through the water inlet pump 22, when the water surface reaches the middle of the reactor main body 20 , use a sterile syringe to add 100mL of activated sludge from the anaerobic tank of the urban sewage treatment plant (sludge concentration is 2800mg / L), continue to infuse water until the main body of the reactor is filled with 20°C, ...

Embodiment 2

[0046] In this embodiment, a reactor body 20 with an effective volume of 1.8 L, an inner diameter of 700 mm, and a height of 500 mm is used. The hollow fiber membranes 19 are commercially available PVC hollow fiber membranes 19, with an outer diameter of 1.66 mm, an inner diameter of 1 mm, and a membrane pore diameter of 0.02 μm. There are 60 hollow fiber membranes 19 in total for each membrane module (120 are formed after bending). The aeration hydrogen partial pressure is 0.04MPa. The prepared simulated wastewater (pH=7.0-7.5) containing As(Ⅴ) 100μg / L and inorganic carbon source, nitrogen source and sulfate is pumped into the reactor through the inlet pump 22. When the water surface reaches the middle of the reactor, Use a sterile syringe to add 100mL of activated sludge from the anaerobic tank of the urban sewage treatment plant (the sludge concentration is 2800mg / L), continue to feed water until the reactor is full, stop the water feed, set the reflux rate to 10mL / min for ...

Embodiment 3

[0048] In this embodiment, the same reactor main body 20 as in Embodiment 1 and Embodiment 2 is used, and a similar cultivation and acclimation scheme is used to treat nitrate, and a better removal effect is obtained. When water enters NO 3 - - When N is 10mg / L, the removal rate can reach 100% after two days of domestication; when the influent depth increases to 30mgNO 3 - When -N / L, it can still be completely removed.

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Abstract

The invention discloses a reactor for degrading oxidative pollutants in a water body by using microorganisms. The reactor comprises a reactor main body and a membrane module, wherein a water inlet is formed in the lower end of the reactor main body; an exhaust opening and a water outlet are formed in the top end of the reactor main body; a water inlet is formed in the bottom end of the reactor main body and is used for introducing hydrogen; the membrane module is arranged inside the reactor main body; the air inlet end of the membrane module is communicated with the gas inlet. According to the reactor for degrading the oxidative pollutants in the water body by using the microorganisms, disclosed by the invention, the hydrogen is introduced and is diffused into water from the membrane module in a foamless form for the microorganisms to utilize; the pollutants in the water and the membrane module are enabled to be in full contact; in addition, the membrane module provides a favorable attaching place for the microorganisms; quick, safe and efficient removal of the oxidative pollutants is realized by controlling the supply level of the hydrogen, hydraulic retention time and a load of pollutants entering the water.

Description

technical field [0001] The invention relates to the technical field of water purification treatment, in particular to a reactor for degrading oxidative pollutants in water by using microorganisms. Background technique [0002] At present, the problem of pollution of surface water and groundwater by oxidized substances in my country is still very serious. Oxidative pollutants in water mainly include: oxidized heavy metals (dichromate, arsenate, etc.), inorganic ionic compounds (nitrate, sulfate, bromate, perchlorate, etc.) and halogenated organic compounds ( p-nitrochlorobenzene, trichloroethylene, chloroform, etc.). The traditional removal methods for the above-mentioned oxidative pollutants mainly include: physical treatment, chemical reduction, ion exchange, reverse osmosis, electrodialysis, adsorption and biochemical treatment. However, some of the traditional treatment methods mentioned above often restrict their development and promotion due to various factors such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F103/06
Inventor 李海翔蒋敏敏韩亚梅张欢林华张学洪曾鸿鹄莫凌云
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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