Biological denitrification treatment method of dimethylamine wastewater

A technology of biological denitrification and treatment method, applied in the field of biological denitrification treatment of dimethylamine wastewater, can solve the problems of complicated operation, high energy consumption, volatile dimethylamine, etc., achieve mild operating conditions, improve treatment efficiency, good treatment effect

Inactive Publication Date: 2020-06-26
HANGZHOU NORMAL UNIV QIANJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dimethylamine is volatile and has a strong irritating effect on the eyes and respiratory tract. When the wastewater contains a low concentration of dimethylamine, it will produce an unpleasant fishy smell. If it is directly discharged into the water body, it will be harmful to the human body, organisms and the environment. have a huge impact
These methods have the disadvantages of high energy consumption, high cost, unsatisfactory treatment effect and cumbersome operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment relates to a biological denitrification treatment method for dimethylamine wastewater, comprising the following steps:

[0029] 1. Transfer 5L of dimethylamine wastewater with an initial total nitrogen concentration of 120mg / L to the regulating tank, and add sulfuric acid to make the pH value of the wastewater reach 7.0;

[0030] 2. Transport the wastewater in the regulating tank in step 1 to the ammoniating tank containing obligate ammonifying bacteria for 1 day, wherein the obligate ammonifying bacteria enrich the ammonifying bacteria in the activated sludge by using the culture solution obtained through collective culture; specifically, obligate ammonifying bacteria were obtained through sequencing batch enrichment culture.

[0031] The following is the process of enriching and cultivating obligate ammonifying bacteria in the present invention:

[0032] Prepare 5 L of culture solution containing dimethylamine, methanol, sodium bicarbonate, ferrous su...

Embodiment 3

[0050] This embodiment relates to a biological denitrification treatment method for dimethylamine wastewater, comprising the following steps:

[0051] 1. Transfer 5L of dimethylamine wastewater with an initial total nitrogen concentration of 200mg / L to the regulating tank, and add sulfuric acid to make the pH value of the wastewater reach 7.0;

[0052] 2. Transport the wastewater in the regulating tank in step 1 to the ammoniating tank containing obligate ammonifying bacteria for 1 day, wherein the obligate ammonifying bacteria enrich the ammonifying bacteria in the activated sludge by using the culture solution obtained through collective culture; specifically, obligate ammonifying bacteria were obtained through sequencing batch enrichment culture.

[0053] The following is an example of the enrichment culture of obligate ammonifying bacteria of the present invention: prepare 5L of culture solution containing dimethylamine, methanol, sodium bicarbonate, ferrous sulfate, magne...

Embodiment 6

[0080] This embodiment relates to a biological denitrification treatment method for dimethylamine wastewater, comprising the following steps:

[0081] 1. Transfer 5L of dimethylamine wastewater with an initial total nitrogen concentration of 50mg / L to the regulating tank, and add sulfuric acid to make the pH value of the wastewater reach 7.0;

[0082] 2. Transport the wastewater in the regulating tank in step 1 to the ammoniating tank containing obligate ammonifying bacteria for 1 day, wherein the obligate ammonifying bacteria enrich the ammonifying bacteria in the activated sludge by using the culture solution Collected and cultivated;

[0083] 3. The waste water of step 2 through ammonification treatment for 1 day is transported to the nitrification tank, the polyethylene bioactive filler that is beneficial to the growth of nitrifying bacteria is set in the nitrification tank, sodium bicarbonate is added to adjust the wastewater pH to 8.0, and the dissolved oxygen concentrat...

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PUM

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Abstract

The invention relates to a biological denitrification treatment method for dimethylamine wastewater. The biological denitrification treatment method comprises the following steps: 1, conveying dimethylamine wastewater to an adjusting tank, and adjusting the pH value; 2, conveying the dimethylamine wastewater subjected to pH adjustment into an ammoniation tank containing obligate ammoniation bacteria, and carrying out ammoniation treatment; 3, carrying out nitrification treatment; 4, carrying out denitrification nitrogen removal treatment; and 5, refluxing the wastewater subjected to denitrification treatment to the ammoniation tank, and repeating the operations in the steps 2-4 until the ammonia nitrogen content and the total nitrogen content in the wastewater meet the requirements, wherein the obligate ammoniation bacteria are obtained by performing sequencing batch enrichment culture on ammoniation bacteria in activated sludge by utilizing a culture solution, and bioactive fillers are arranged in the nitrification tank and the denitrification tank. According to the invention, the obligate ammoniation bacteria cultured by the invention can efficiently convert dimethylamine into inorganic ammonia nitrogen, so that the most core link of dimethylamine biological denitrification is solved; and bioactive fillers are introduced in nitrification and denitrification processes, so thatthe nitrification and denitrification efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a biological denitrification treatment method for dimethylamine wastewater. Background technique [0002] Dimethylamine (Dimethylamine, DMA), also known as N-methylmethylamine or aminodimethylamine, is easily soluble in water and is an important chemical intermediate widely used as a rubber vulcanization accelerator, medicine (such as antibiotics), dyestuff , Pesticides (such as thiram, dimeform, etc.), industrial solvents (such as N, N-dimethylformamide) and raw materials for propellants. Dimethylamine is volatile and has a strong irritating effect on the eyes and respiratory tract. When the wastewater contains a low concentration of dimethylamine, it will produce an unpleasant fishy smell. If it is directly discharged into the water body, it will be harmful to the human body, organisms and the environment. cause a great impact. At present, the treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16C02F103/36
CPCC02F1/66C02F3/302C02F3/34C02F9/00C02F2101/16C02F2103/36
Inventor 陈世良谢文杰洪秋林朱佳妮黄嘉驰
Owner HANGZHOU NORMAL UNIV QIANJIANG COLLEGE
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