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Method for efficiently treating nitrogen-containing waste water based on combination of dissimilatory reduction of nitrate into ammonium and denitrification coupling anammox

An anaerobic ammonium oxidation and nitrate technology, applied in anaerobic digestion treatment, chemical instruments and methods, natural water treatment, etc. Simple, environmentally safe effects

Active Publication Date: 2018-07-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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

Method used

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  • Method for efficiently treating nitrogen-containing waste water based on combination of dissimilatory reduction of nitrate into ammonium and denitrification coupling anammox
  • Method for efficiently treating nitrogen-containing waste water based on combination of dissimilatory reduction of nitrate into ammonium and denitrification coupling anammox

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Embodiment 1

[0043] A method for efficiently treating nitrogen-containing wastewater based on dissimilatory reduction of nitrate to ammonium combined with denitrification coupled with anaerobic ammonium oxidation, comprising the following steps:

[0044] (1) Stir the aerobic activated sludge evenly and add it to the reaction zone of the anaerobic membrane bioreactor; The impurities in the mud are obtained from leaves, waste paper, and waste plastics, and the moisture content of the aerobic activated sludge is greater than or equal to 98wt%. The volume 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;

[0045] (2) Two water inlets are carried out from the two water inlets on the top of the anaerobic membrane bioreactor, one water inlet passes through the inorganic wastewater, and the other water inlet passes through the organic wastewater, and the organic wastewater and the inorganic wa...

Embodiment 2

[0052] With the method described in Example 1 based on nitrate dissimilation reduction into ammonium combined with denitrification coupling anaerobic ammonium oxidation efficient treatment of nitrogen-containing wastewater, the difference is:

[0053] 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 is 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 minutes, and the aeration intensity is 5mL / (L min). Preferably, t...

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Abstract

The invention relates to a method for efficiently treating nitrogen-containing waste water based on the combination of dissimilatory reduction of nitrate into ammonium and denitrification coupling anammox. The method comprises the following steps: adding aerobic activated sludge into an anaerobic membrane bioreactor; introducing waste water to be treated into the anaerobic membrane bioreactor through two water inflows so as to realize the synchronous enrichment of dissimilatory nitrate reduction to ammonium (DNRA) bacteria, denitrifying bacteria and anammox bacteria; and successfully startingthe combination of dissimilatory reduction of nitrate into ammonium and denitrification coupling anammox to realize efficient removal of nitrogen in the sewage. According to the method provided by theinvention, combined denitrification processes of denitrification, anammox and DNRA occur simultaneously in the late stage of a process of enriching and culturing DNRA, so that the low chemical oxygendemand (COD) and the low-temperature tolerance of the anammox bacteria are greatly improved, the DNRA bacteria, the denitrifying bacteria and the anammox bacteria exert advantages separately in a same environment, and the denitrification efficiency and the organic matter utilization rate can be greatly improved.

Description

technical field [0001] The invention relates to a method for efficiently treating nitrogen-containing wastewater based on the dissimilation reduction of nitrate to ammonium combined with denitrification coupled with anaerobic ammonium oxidation, belonging 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] ...

Claims

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Application Information

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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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