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Ammonia-nitrogen wastewater treatment method

A technology of ammonia nitrogen wastewater and treatment method, applied in water treatment parameter control, water/sewage multi-stage treatment, degassed water/sewage treatment, etc. Achieve the effect of high ammonia nitrogen removal efficiency, low investment and operating costs, and improved removal rate

Pending Publication Date: 2022-06-07
湖南金保树环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, sewage treatment plants usually use a combination of chemical precipitation and membrane separation technology to treat ammonia nitrogen wastewater. The entire wastewater treatment system includes many equipment such as reaction tanks, separation tanks, and sedimentation tanks. The area is very large, and the connection between equipment The pipeline is seriously damaged due to the deposition of waste slag during long-term use, which is likely to cause leakage and other phenomena, increasing the burden of components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The method for ammonia nitrogen wastewater of the present embodiment comprises the following steps:

[0016] S1: The pH value of the smelting ammonia nitrogen wastewater with an ammonia nitrogen concentration of 10g / L is adjusted to about 11 with sodium hydroxide solution, the purpose is to make the ammonium ions in the ammonia nitrogen wastewater easily converted into ammonia monohydrate, so that in the subsequent flash evaporation treatment It can make more ammonia nitrogen in the ammonia nitrogen wastewater to form ammonia gas, so that the evaporated concentrate can meet the emission standard.

[0017] S2: The ammonia nitrogen waste water whose pH value is adjusted is first flocculated and settled in a reaction sedimentation tank to obtain a supernatant liquid and a thick liquid, and then the thick liquid is processed by a pressure filtration washing process to obtain a filtrate and a filter residue, and the supernatant liquid and the filtrate are combined to obtain ...

Embodiment 2

[0023] The method for ammonia nitrogen wastewater of the present embodiment comprises the following steps:

[0024] S1: The pH value of smelting ammonia nitrogen wastewater with ammonia nitrogen concentration of 13.5g / L is adjusted to about 12 by using sodium hydroxide solution.

[0025] S2: The ammonia nitrogen waste water whose pH value is adjusted is first flocculated and settled in a reaction sedimentation tank to obtain a supernatant liquid and a thick liquid, and then the thick liquid is processed by a pressure filtration washing process to obtain a filtrate and a filter residue, and the supernatant liquid and the filtrate are combined to obtain pretreatment solution.

[0026] S3: The pretreatment liquid is transported to a liquid storage tank with a heater for heating, and the pretreatment liquid is heated to 70°C.

[0027] S4: Turn on the ultrasonicator at the bottom of the ultrasonic flash tower, and transport the heated pretreatment liquid to the top inlet of the ul...

Embodiment 3

[0029] The method for ammonia nitrogen wastewater of the present embodiment comprises the following steps:

[0030] S1: The pH value of smelting ammonia nitrogen wastewater with ammonia nitrogen concentration of 9.5g / L is adjusted to about 11 by using sodium hydroxide solution.

[0031] S2: The ammonia nitrogen waste water whose pH value is adjusted is first flocculated and settled in a reaction sedimentation tank to obtain a supernatant liquid and a thick liquid, and then the thick liquid is processed by a pressure filtration washing process to obtain a filtrate and a filter residue, and the supernatant liquid and the filtrate are combined to obtain pretreatment solution.

[0032] S3: The pretreatment liquid is transported to a liquid storage tank with a heater for heating, and the pretreatment liquid is heated to 75°C.

[0033] S4: Turn on the ultrasonicator at the bottom of the ultrasonic flash tower, and transport the heated pretreatment liquid to the top inlet of the ult...

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Abstract

The invention discloses an ammonia-nitrogen wastewater treatment method, which comprises: adjusting the pH value of ammonia-nitrogen wastewater to an alkaline state, and carrying out solid-liquid separation to obtain a pretreatment liquid; the pretreatment liquid falls to the bottom of an ultrasonic flash tower from the top of the ultrasonic flash tower in a spraying mode, an ultrasonic device installed at the bottom of the ultrasonic flash tower conducts ultrasonic treatment on the pretreatment liquid at the bottom of the tower, and ammonia gas continuously generated in the tower is guided out through a gas outlet pipe and collected; the pretreatment liquid at the bottom of the tower returns to the top of the tower through a circulating pipeline for spraying, and the circulating operation is performed for 5-10 hours. The treatment method has the advantages of simple structure, low investment and operation cost, high ammonia nitrogen removal efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating ammonia nitrogen wastewater. Background technique [0002] Fertilizer, smelting, coking, petrochemical, pharmaceutical, food, landfill, etc. will all produce a large amount of high-concentration ammonia nitrogen wastewater. A large amount of ammonia nitrogen wastewater discharged into the water body will not only cause eutrophication of the water body, causing the water body to be black and odorous, but also increase the difficulty and cost of water treatment, and even produce toxic effects on people and organisms. With the rapid development of chemical fertilizer, petrochemical and other industries, the resulting high ammonia nitrogen wastewater has also become one of the restrictive factors for the development of the industry. Ammonia nitrogen is one of the important causes of pollution in the red tide occurring in the sea area of ​​my countr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/16
CPCC02F9/00C02F1/66C02F1/06C02F1/36C02F1/20C02F2101/16C02F2209/06C02F2209/02C02F2209/14Y02W10/10
Inventor 周孝芳谢田皋汤卫军
Owner 湖南金保树环保科技有限公司