CN111072145A

CN111072145A - Ammonia nitrogen remover

Info

Publication number: CN111072145A
Application number: CN201811223732.1A
Authority: CN
Inventors: 曹明
Original assignee: Shanghai Shenying Environmental Protection Technology Co Ltd
Current assignee: Shanghai Shenying Environmental Protection Technology Co Ltd
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2020-04-28

Abstract

The invention discloses an ammonia nitrogen remover, which comprises the following components in parts by weight: 0-50 parts of sodium hypochlorite, 0-50 parts of 5-chloro-2-methyl-4-isothiazoline-3-ketone or 2-methyl-4-isothiazoline-3-ketone, 0-10 parts of 2-mercapto-2-methyl-1-pentanol, 0-10 parts of 3-mercapto-ethyl butyrate and 0-90 parts of water. According to the invention, under the passivation protection action of 2-mercapto-2-methyl-1-pentanol and 3-mercapto-ethyl butyrate, the propagation growth of non-nitrifying bacteria is effectively inhibited by utilizing sodium hypochlorite, 5-chloro-2-methyl-4-isothiazolin-3-one or 2-methyl-4-isothiazolin-3-one, the nitrifying bacteria are rapidly propagated within 5-28 days, the removal efficiency is increased, the ammonia nitrogen removal effect is greatly improved, the cost is low, and no secondary pollution is caused to the environment.

Description

Ammonia nitrogen remover

Technical Field

The invention relates to the technical field of water treatment, in particular to an ammonia nitrogen remover.

Background

Ammonia nitrogen refers to free ammonia (NH) in water₃) And ammonium ion (NH)₄ ⁺) Nitrogen in the form present. Proper amount of nitrogen in water is a basic element for synthesizing microorganisms such as algae, is an important material condition for forming aquatic ecological environment, and is also the basis of water environment virtuous cycle. However, at present, the total amount of nitrogen in some water bodies exceeds the capacity of the water bodies, and the excessive nitrogen elements cause abnormal proliferation of organisms such as algae in the water bodies and cause water quality deterioration. In addition, the pollution of ammonia nitrogen also threatens the safety of drinking water, causes harm to aquatic animals such as fish and the like, causes eutrophication and makes the lake ecosystem vicious circle. In recent years, along with the occurrence of a large number of water body pollution events caused by various ammonia nitrogen, the severity of ammonia nitrogen pollution increasingly draws attention of people, and the country also pays attention to waterAmmonia nitrogen displacement in the body sets more stringent standards.

The ammonia nitrogen remover is a general name of a medicament specially used for removing ammonia nitrogen in wastewater in sewage treatment. At present, ammonia nitrogen removers mainly comprise two types, namely chemical agents and microbial agents. Adding chemical agents to enable ammonia nitrogen in the wastewater to perform chemical reaction and reduce the concentration of the ammonia nitrogen in the wastewater, such as a breakpoint chlorination method, and adding a large amount of chlorine to react with amine to reduce the content of ammonium nitrogen; and (3) decomposing ammonia nitrogen in the wastewater by the domesticated microorganisms by adding a microbial agent. Most of the current domestic water production processes are implemented by adding chlorine gas to oxidize and remove ammonia nitrogen, and when the ammonia nitrogen in raw water is especially NH₃When the content is too high, in order to achieve the effects of discharging residual chlorine and removing ammonia nitrogen on the surface, excessive chlorine gas needs to be added, the adding amount of the chlorine gas is 1-2 mg/L under normal conditions, and when NH exists, the chlorine gas is added in an amount of 1-2 mg/L₃When the ammonia nitrogen content is 2mg/L, 14-20 mg/L of chlorine is required to be additionally added. Therefore, not only is a great deal of chlorine wasted, but also more seriously, the added great deal of chlorine reacts with humus in raw water to generate volatile trihalomethane which is a carcinogenic substance, and an effective method for removing the trihalomethane is not available in water works at present. In addition, when the concentration of ammonia nitrogen in the water body is too high, the water body is alkaline, so that the flocculating agent is ineffective, and water cannot be normally produced.

Disclosure of Invention

The invention aims to overcome the defects of ammonia nitrogen removers and provides an ammonia nitrogen remover which has the advantages of good ammonia nitrogen removing effect, short period and low cost.

In order to achieve the purpose, the invention adopts the following technical scheme: an ammonia nitrogen remover comprises the following components in parts by weight: 0.1-50 parts of sodium hypochlorite, 2-50 parts of 5-chloro-2-methyl-4-isothiazoline-3-ketone or 2-methyl-4-isothiazoline-3-ketone, 0-10 parts of 2-mercapto-2-methyl-1-pentanol, 0-10 parts of 3-mercapto-ethyl butyrate and 0-90 parts of water.

The sodium hypochlorite, the 5-chloro-2-methyl-4-isothiazoline-3-ketone or the 2-methyl-4-isothiazoline-3-ketone in the ammonia nitrogen remover effectively inhibits non-nitrifying bacteria under the passivation protection action of the 2-mercapto-2-methyl-1-pentanol and the 3-mercapto-ethyl butyrate, but does not influence the propagation and growth of the nitrifying bacteria, so that the nitrifying bacteria can be rapidly propagated within 5-28 days, the removal efficiency is increased, and the ammonia nitrogen removal effect is greatly improved.

Furthermore, the adding amount of the ammonia nitrogen remover is 10-100 ppm, and the ammonia nitrogen remover can be used for sewage treatment.

Further, sodium hypochlorite, 5-chloro-2-methyl-4-isothiazoline-3-ketone or 2-methyl-4-isothiazoline-3-ketone, 2-mercapto-2-methyl-1-pentanol, 3-mercapto-ethyl butyrate and water are sequentially added into the reaction kettle, and the mixture is stirred for 20 minutes under the stirring condition of 100r/min to obtain the ammonia nitrogen remover.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, under the passivation protection action of 2-mercapto-2-methyl-1-pentanol and 3-mercapto-ethyl butyrate, the propagation growth of non-nitrifying bacteria is effectively inhibited by utilizing sodium hypochlorite, 5-chloro-2-methyl-4-isothiazolin-3-one or 2-methyl-4-isothiazolin-3-one, the nitrifying bacteria are rapidly propagated within 5-28 days, the removal efficiency is increased, the ammonia nitrogen removal effect is greatly improved, the cost is low, the method is suitable for various waste water containing ammonia nitrogen, and no secondary pollution is caused to the environment.

Detailed Description

In order to more clearly illustrate the technical solution of the present invention, the following will be further described with reference to various embodiments.

Example 1

An ammonia nitrogen remover comprises the following components in parts by weight: 50 parts of 8% sodium hypochlorite, 0.5 part of 5-chloro-2-methyl-4-isothiazolin-3-one/2-methyl-4-isothiazolin-3-one, 5 parts of 2-mercapto-2-methyl-1-pentanol, 0.5 part of 3-mercapto-ethyl butyrate and 64 parts of water.

Sequentially adding the components in the weight fraction into a reaction kettle, and stirring for 20 minutes under the stirring condition of 100r/min to obtain the ammonia nitrogen remover; adding the obtained ammonia nitrogen remover into the front end of an aerobic tank in the sewage treatment process according to the anaerobic-anoxic-aerobic method according to the adding amount of 25ppm, and reducing the ammonia nitrogen concentration from 15 to 4 after 24 days.

Wherein, the anaerobic-anoxic-aerobic sewage treatment process is electroplating industrial wastewater with daily treatment capacity of 1000 tons.

Example 2

An ammonia nitrogen remover comprises the following components in parts by weight: 5 parts of 8% sodium hypochlorite, 50 parts of 5-chloro-2-methyl-4-isothiazoline-3-ketone/2-methyl-4-isothiazoline-3-ketone, 10 parts of 3-mercapto-ethyl butyrate and 35 parts of water.

Sequentially adding the components in the weight fraction into a reaction kettle, and stirring for 20 minutes under the stirring condition of 100r/min to obtain the ammonia nitrogen remover; adding the obtained ammonia nitrogen remover into the front end of an aerobic tank in the sewage treatment process according to the anaerobic-anoxic-aerobic method according to the adding amount of 25ppm, and reducing the ammonia nitrogen concentration from 18 to 2 after 7 days.

Wherein, the anaerobic-anoxic-aerobic sewage treatment process is municipal domestic wastewater with daily treatment capacity of 4.5 ten thousand tons.

Example 3

An ammonia nitrogen remover comprises the following components in parts by weight: 30 parts of 8% sodium hypochlorite, 20 parts of 5-chloro-2-methyl-4-isothiazoline-3-ketone, 10 parts of 2-mercapto-2-methyl-1-pentanol and 40 parts of water.

Sequentially adding the components in the weight fraction into a reaction kettle, and stirring for 20 minutes under the stirring condition of 100r/min to obtain the ammonia nitrogen remover; adding the obtained ammonia nitrogen remover into the front end of an aerobic tank in the sewage treatment process according to the anaerobic-anoxic-aerobic method according to the adding amount of 25ppm, and reducing the ammonia nitrogen concentration from 23 to 5 after 7 days.

Wherein, the anaerobic-anoxic-aerobic sewage treatment process is municipal domestic wastewater with daily treatment capacity of 2 ten thousand tons.

The foregoing detailed description is given by way of example only, to better enable one of ordinary skill in the art to understand the patent, and is not to be construed as limiting the scope of what is encompassed by the patent; any equivalent alterations or modifications made according to the spirit of the disclosure of this patent are intended to be included in the scope of this patent.

Claims

1. The ammonia nitrogen remover is characterized by comprising the following components in parts by weight: 0.1-50 parts of sodium hypochlorite, 2-50 parts of 5-chloro-2-methyl-4-isothiazoline-3-ketone or 2-methyl-4-isothiazoline-3-ketone, 0-10 parts of 2-mercapto-2-methyl-1-pentanol, 0-10 parts of 3-mercapto-ethyl butyrate and 0-90 parts of water.

2. An ammonia nitrogen remover according to claim 1, wherein the amount of the ammonia nitrogen remover added is 10-100 ppm, and the ammonia nitrogen remover can be used for sewage treatment.

3. The method for preparing ammonia nitrogen remover according to claim 1, characterized in that sodium hypochlorite, 5-chloro-2-methyl-4-isothiazolin-3-one or 2-methyl-4-isothiazolin-3-one, 2-mercapto-2-methyl-1-pentanol, 3-mercapto-ethyl butyrate and water are added into a reaction kettle in sequence, and the mixture is stirred for 20 minutes under the stirring condition of 100r/min to obtain the ammonia nitrogen remover.