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Method for biological treatment of nitrogen in wastewater by nitritation

A biological treatment and nitrosation technology, applied in the adjustment methods of biological treatment, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of unoptimized and difficult to implement, etc.

Pending Publication Date: 2020-07-10
SUEZ GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the implementation of this suppression is not yet optimized and remains difficult to implement in current processes for the treatment of nitrogen contained in wastewater by nitrification-denitritation and deammoniation

Method used

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  • Method for biological treatment of nitrogen in wastewater by nitritation
  • Method for biological treatment of nitrogen in wastewater by nitritation
  • Method for biological treatment of nitrogen in wastewater by nitritation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1 : Establishment and maintenance of nitrosation by NOB inhibition in a continuously fed nitrosation-denitritation reactor

[0065] The system for the biological treatment of wastewater nitrogen consists of two 4 and 8.9m 3 The activated sludge bioreactor and 10.6m 3 The clarifier consists of a continuous supply of 2m 3 / h pre-treated municipal wastewater to remove colloidal and particulate carbon. The bioreactor is equipped with a mixer, an aeration system, a device for measuring and regulating the concentration of dissolved oxygen, and a device for measuring the concentration of nitrite, nitrate and ammonium. Ammonium nitrogen processing was initiated without prior inoculation of the bioreactor. The effects of dissolved oxygen concentration during the aeration phase, nitrite elimination prior to the aeration phase, and the effective life of the aerated sludge over time on NOB inhibition and establishment of nitrosation in the reactor were tested according...

Embodiment 2

[0075] Example 2 : Establishment and maintenance of nitrosation by NOB inhibition in a batch-fed SBR nitrosation-denitritation reactor

[0076] The bioreactor is based on 13.7m 3 / d SBR type activated sludge reactor intermittently fed with pre-treated municipal wastewater to remove colloidal and particulate carbon and constant level of suspended solids. The dimensions of the reactor are as follows: diameter: 1.2m; surface area: 1.13m 3 ;Total height: 4m; Water level: 3.18m; Volume: 3.6m 3 . The reactor is equipped with a mixer; an aeration system; means for measuring and regulating the dissolved oxygen concentration and means for measuring the concentration of nitrite, nitrate and ammonium. Nitrogen treatment was performed by sequentially performing a continuous cycle of the following four steps: simultaneous feed and discharge step for 60 min, anoxic step for 30 min, aeration step for 60 min, and decanting step for 60 min.

[0077] The effects of dissolved oxygen concen...

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Abstract

The invention relates to a method for the biological treatment of the nitrogen in the form of ammonium in the wastewater by the nitritation in a biological reactor. The method comprises at least one step a of aerating the biological reactor containing the wastewater to be treated, at least one step b of removing at least a portion of the nitrites produced in step a, and a step c of extracting, from the reactor, a fraction of the sludge resulting from steps a and b. The invention also concerns a method for the biological treatment of nitrogen in the wastewater by nitritation / de-nitritation and / or de-ammonification, wherein the nitritation is implemented using the nitritation method according to the invention.

Description

technical field [0001] The present invention relates to a method for the biological treatment of nitrogen in wastewater by nitrosation. The present invention also relates to a method for the biological treatment of nitrogen in wastewater by nitrosation-denitritation and / or deamination (also known as partial nitrosation-anammox), wherein nitrosation is carried out by the method according to the invention nitrification. Background technique [0002] Typically, wastewater treatment plants are primarily designed to remove carbon, nitrogen and phosphorus through biological processes using specific bacteria. [0003] Nitrogen treatment usually involves nitrification followed by denitrification. Nitrification is carried out by autotrophic bacteria, ammonia nitrogen or ammonium (also known as NH4 or NH 4 +) becomes the following oxidation reaction: [0004] Nitrite nitrogen, also known as nitrite, NO2 or NO 2 -; [0005] Then there is nitrate nitrogen, also known as nitrate, N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/006C02F3/301C02F3/303C02F2101/16C02F2209/14C02F2209/15C02F2209/22C02F2301/04C02F3/307Y02W10/10C02F3/12C02F3/305C02F2101/166
Inventor M·卡利加里斯T·塞奥尔I·莫左
Owner SUEZ GRP
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