A method for efficient treatment of nitrogen-containing wastewater based on dissimilatory reduction of nitrate to ammonium combined with denitrification coupled with anaerobic ammonium oxidation

A technology of anaerobic ammonium oxidation and nitrate, which is applied in anaerobic digestion treatment, chemical instruments and methods, natural water treatment, etc., can solve the problems of weakening single treatment effect, achieve low COD and low temperature tolerance, and operate Simple, copy-enrichment-obvious effects

Active Publication Date: 2021-03-02
SHANDONG UNIV
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Problems solved by technology

[0005] Due to the different C / N conditions applicable to denitrification and nitrate dissimilation to ammonium, currently, denitrification and nitrate dissimilation to ammonium cannot be combined to treat nitrogen-containing wastewater. If they are combined, the two will inhibit each other, greatly weakened the effect of a single treatment

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  • A method for efficient treatment of nitrogen-containing wastewater based on dissimilatory reduction of nitrate to ammonium combined with denitrification coupled with anaerobic ammonium oxidation
  • A method for efficient treatment of nitrogen-containing wastewater based on dissimilatory reduction of nitrate to ammonium combined with denitrification coupled with anaerobic ammonium oxidation
  • A method for efficient treatment of nitrogen-containing wastewater based on dissimilatory reduction of nitrate to ammonium combined with denitrification coupled with anaerobic ammonium oxidation

Examples

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Embodiment 1

[0046] A method for treating nitrogen-containing wastewater based on dissimilatory reduction of nitrate to ammonium combined with denitrification coupled with anaerobic ammonium oxidation, comprising the following steps:

[0047] (1) Stir the aerobic activated sludge evenly and add it to the reaction zone of the anaerobic membrane bioreactor; The impurities in the sludge are obtained from leaves, waste paper, and waste plastics, and the moisture content of the aerobic activated sludge is greater than or equal to 98 wt %; the anaerobic membrane bioreactor is a submerged anaerobic membrane bioreactor, and the membrane is a non-woven membrane. The flux is 120L / m 2 / h; the membrane support is a polymethyl methacrylate support; the top of the anaerobic membrane bioreactor is provided with two water inlets;

[0048] (2) From the two water inlets on the top of the anaerobic membrane bioreactor, there are two water inlets, one for inorganic wastewater, and one for organic wastewater,...

Embodiment 2

[0055] With the method described in Example 1 based on nitrate dissimilation reduction to ammonium combined with denitrification coupling anaerobic ammonium oxidation treatment of nitrogenous wastewater, the difference is:

[0056] In step (2), the inlet flow rate of inorganic wastewater and organic wastewater is the same, and the inlet flow rate of inorganic wastewater and organic wastewater is controlled to be 75mL / h, and the total inlet flow rate is 150mL / h, so that the sewage to be treated in the anaerobic membrane bioreactor The internal hydraulic retention time is 40 hours, and the C / N of the wastewater is 10:1. A constant temperature circulating water bath device is used to maintain the internal temperature of the anaerobic membrane bioreactor at 22 degrees, and the anaerobic membrane bioreactor is fed to the anaerobic membrane bioreactor every 6 hours. Nitrogen gas is aerated for 20 min, and the aeration intensity is 5 mL / (L min). Preferably, the wastewater to be treate...

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Abstract

The invention relates to a method for treating nitrogen-containing wastewater based on dissimilation reduction of nitrate to ammonium combined with denitrification coupling anaerobic ammonium oxidation. The method includes the step of adding aerobic activated sludge to an anaerobic membrane bioreactor; The wastewater to be treated is fed into the anaerobic membrane bioreactor to realize the synchronous enrichment steps of DNRA bacteria, denitrifying bacteria and anammox bacteria; Nitrogen removal from wastewater. The invented method simultaneously presents denitrification, anammox, and DNRA combined denitrification process in the late stage of the process of enriching and cultivating DNRA, which greatly improves the low COD and low temperature tolerance of anaerobic ammonium oxidizing bacteria, making DNRA bacteria, anti Nitrifying bacteria and anammox bacteria play their respective advantages in the same environment, which can greatly improve the denitrification efficiency and the utilization rate of organic matter.

Description

technical field [0001] The invention relates to a method for treating nitrogen-containing wastewater based on dissimilatory reduction of nitrate to ammonium combined with denitrification coupled with anaerobic ammonium oxidation, and belongs to the technical field of wastewater microbial treatment. Background technique [0002] Some industrial wastewater contains high concentrations of nitrate nitrogen and nitrite nitrogen, and contains a large amount of organic matter, which is highly polluted wastewater that is strictly prohibited by the state. High-concentration nitrate nitrogen wastewater flows directly into rivers and lakes, polluting surface water and groundwater, leading to the death or even extinction of aquatic animals and plants. If the surrounding residents use surface water or groundwater polluted by nitrate and nitrite as domestic water, it will seriously harm Good health affects the rapid and harmonious development of the local economy. [0003] The traditiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F3/34C02F103/28C02F103/32C02F103/36
CPCC02F3/2853C02F3/34C02F2103/28C02F2103/325C02F2103/36
Inventor 倪寿清卜翠娜
Owner SHANDONG UNIV
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