A method for quickly removing low-concentration ammonia nitrogen from polluted river water

A low-concentration ammonia nitrogen and river water technology, applied in water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of long treatment time and high treatment costs, save operating costs, increase oxygen vacancies, and overcome reactions The slow effect

Active Publication Date: 2020-12-15
浙江水知音环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problems of high treatment cost and long treatment time by break point chlorination method for polluted river water with low concentration of ammonia nitrogen content in the above-mentioned existing polluted river water treatment technology, and provides a method for quickly removing low concentration ammonia nitrogen from polluted river water , combined with break point chlorine oxidation treatment and ultrasonic treatment to improve the reaction efficiency, which is conducive to the efficient removal of ammonia nitrogen and saves operating costs

Method used

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  • A method for quickly removing low-concentration ammonia nitrogen from polluted river water

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Embodiment 1

[0027] A method for quickly removing low-concentration ammonia nitrogen from polluted river water, comprising the steps of:

[0028] (1) The polluted river water enters the mixing tank, and sodium hypochlorite is added into the mixing tank. The dosage of sodium hypochlorite is added according to the weight ratio of effective sodium hypochlorite to the weight ratio of ammonia nitrogen in the polluted river water of 0.2:1, and the mixing is continued for 60 seconds. , the river water has to be treated;

[0029] (2) BaFeO doped with carbon quantum dots 3 The preparation of catalyst, method comprises the steps:

[0030] a. Preparation of carbon quantum dots: Insert two carbon rods into ultrapure water as anode and cathode respectively, use 25V DC voltage between the anode and cathode, and keep stirring the ultrapure water until the ultrapure water is dark yellow, turn off the DC The voltage was stopped to stir, and the dispersion was obtained by centrifugation, and then the disp...

Embodiment 2

[0037] A method for quickly removing low-concentration ammonia nitrogen from polluted river water, comprising the steps of:

[0038] (1) The polluted river water enters the mixing tank, and sodium hypochlorite is added into the mixing tank. The dosage of sodium hypochlorite is added according to the ratio of the weight of effective sodium hypochlorite to the weight ratio of ammonia nitrogen in the polluted river water of 8:1, and the mixing is continued for 80 seconds. , the river water has to be treated;

[0039] (2) BaFeO doped with carbon quantum dots 3 The preparation of catalyst, method comprises the steps:

[0040] a. Preparation of carbon quantum dots: Insert two carbon rods into ultrapure water as anode and cathode respectively, use 45V DC voltage between the anode and cathode, and keep stirring the ultrapure water until the ultrapure water is dark yellow, turn off the DC The voltage was stopped to stir, and the dispersion was obtained by centrifugation, and then the d...

Embodiment 3

[0047] A method for quickly removing low-concentration ammonia nitrogen from polluted river water, comprising the steps of:

[0048] (1) The polluted river water enters the mixing tank, and sodium hypochlorite is added into the mixing tank. The dosage of sodium hypochlorite is added according to the weight ratio of the effective sodium hypochlorite to the ammonia nitrogen in the polluted river water at a ratio of 4:1, and the mixing is continued for 70 seconds. , the river water has to be treated;

[0049] (2) BaFeO doped with carbon quantum dots 3 The preparation of catalyst, the method comprises the steps:

[0050] a. Preparation of carbon quantum dots: insert two carbon rods into ultrapure water as anode and cathode respectively, use 30V DC voltage between the anode and cathode, and keep stirring the ultrapure water until the ultrapure water is dark yellow, turn off the DC The voltage was stopped to stir, and the dispersion was obtained by centrifugation, and then the dis...

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Abstract

The invention discloses a method for rapidly removing low-concentration ammonia nitrogen from polluted river water. The method comprises the following steps: (1) conveying the polluted river water into a mixing tank; adding an oxidant into the mixing tank and continuously stirring and mixing for 60 to 80 seconds; (2) introducing river water to be treated into an ultrasonic strengthening reaction tank; controlling the frequency of ultrasonic waves to 5 to 20KHz, the sound intensity to 0.1 to 1.0W / cm<2> and the hydrolytic retention time to 30 to 60 seconds; (3) conveying output water from the ultrasonic strengthening reaction tank into a rotary reaction tank and continually reacting for 6 to 8 minutes; (4) conveying output water from the rotary reaction tank into an air floatation tank; removing pollutants in the water through an air floatation technology; finally, obtaining clean river water without the ammonia nitrogen. According to the method disclosed by the invention, a combining scheme of breakpoint chlorination oxidization treatment and ultrasonic treatment is adopted, so that the reaction efficiency is improved; the ammonia nitrogen is efficiently removed and the operation cost is saved.

Description

technical field [0001] The invention relates to the technical field of environmental protection and water treatment, in particular to a method for quickly removing low-concentration ammonia nitrogen from polluted river water. Background technique [0002] In recent years, the treatment of polluted river water has always been one of the most concerned contents of the people: such as the treatment of black and odorous water bodies in cities, and the elimination of inferior five-category water. Exceeding water pollution indicators in polluted river water include COD, ammonia nitrogen, total phosphorus, dissolved oxygen, etc., and ammonia nitrogen is the most common and difficult to remove. As we all know, there are many ways to remove ammonia nitrogen, such as physical and chemical methods with breaking point chlorination method, air stripping method, chemical precipitation method, liquid membrane method, electrodialysis method for removing ammonia nitrogen method, catalytic we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08B01J23/78C02F101/16
CPCB01J23/78C02F1/24C02F1/36C02F1/725C02F1/76C02F9/00C02F2101/16
Inventor 阮忠强杨万东俞明华俞佳情阮嘉琪
Owner 浙江水知音环保科技有限公司
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