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Pretreatment method of ammonia-nitrogen wastewater

An ammonia nitrogen wastewater, pretreatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as poor ability to remove organic amine nitrogen, and achieve reasonable design results

Active Publication Date: 2015-04-22
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a new physical and chemical treatment method for the poor ability of the existing physical and chemical treatment to remove organic amine nitrogen. The technical problem to be solved is to effectively remove inorganic ammonia nitrogen and organic amine nitrogen in ammonia nitrogen wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, a kind of pretreatment method of ammonia-nitrogen wastewater, its steps are as follows: First, appropriate amount of denitrification agent is added in high-concentration ammonia-nitrogen wastewater, and then transported to the aeration tank of the denitrification tower with a pump, in the denitrification tower Fill with catalyst and aerate with an air compressor at pH > 9 and temperature 10-100°C;

[0023] Described denitrification agent is made up of the raw material of following weight percent:

[0024] Methyl cellulose 25%;

[0025] Ethyl cellulose 25%;

[0026] Sodium chlorite 25%;

[0027] Citric acid 25%;

[0028] The amount of denitrification agent added is 1 / 10,000 of the weight of waste water;

[0029] Described catalyst is prepared by following steps:

[0030] (1) Immerse granular activated carbon or activated alumina with a 5% inorganic acid solution for 12-48 hours, filter, and wash with deionized water until neutral; then impregnate with ...

Embodiment 2

[0033] Embodiment 2, a kind of pretreatment method of ammonia-nitrogen wastewater, its steps are as follows: first add appropriate amount of denitrification agent in high-concentration ammonia-nitrogen wastewater, then use pump to transport to the aeration tank of denitrification tower, denitrification tower Fill with catalyst and aerate with an air compressor at pH > 9 and temperature 10-100°C;

[0034] Described denitrification agent is made up of the raw material of following weight percent:

[0035] Methylcellulose 30%;

[0036] Ethyl cellulose 30%;

[0037] Sodium chlorite 20%;

[0038] Citric acid 20%;

[0039] The addition amount of denitrification agent is 3 / 10,000 of the weight of waste water;

[0040] Described catalyst is prepared by following steps:

[0041] (1) Immerse granular activated carbon or activated alumina with a 50% inorganic acid solution for 12-48 hours, filter, and wash with deionized water until neutral; then impregnate it with a 5% inorganic al...

Embodiment 3

[0044] Embodiment 3, a kind of pretreatment method of ammonia-nitrogen wastewater, its steps are as follows: First, appropriate amount of denitrification agent is added in the high-concentration ammonia-nitrogen wastewater, and then pumped to the aeration tank of the denitrification tower, the denitrification tower Fill with catalyst and aerate with an air compressor at pH > 9 and temperature 10-100°C;

[0045] Described denitrification agent is made up of the raw material of following weight percent:

[0046] Methyl cellulose 25%;

[0047] Ethyl cellulose 25%;

[0048] Sodium chlorite 20%;

[0049] 30% citric acid;

[0050] The amount of denitrification agent added is 2 / 10,000 of the weight of waste water;

[0051] Described catalyst is prepared by following steps:

[0052] (1) After immersing granular activated carbon or activated alumina in an inorganic acid solution with a mass concentration of 15% for 12 to 48 hours, filter and wash with deionized water until neutral...

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PUM

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Abstract

The invention provides a pretreatment method of ammonia-nitrogen wastewater. The pretreatment method of the ammonia-nitrogen wastewater comprises the steps that firstly, an appropriate quantity of denitrfying agents are added into high-concentration ammonia-nitrogen wastewater, then the solution is conveyed to an aeration tank of a denitrification tower through a pump, the denitrification tower is filled with a catalyst, and an air compressor carries out aeration treatment on the solution under the condition of pH>9 and at the temperature of 10-100 DEG C; the denitrfying agents are composed of methylcellulose, ethyl cellulose, sodium chlorite and citric acid, and the adding quantity of the denitrfying agents is 100 parts per million to 300 parts per million of the weight of wastewater. The pretreatment method of the ammonia-nitrogen wastewater is suitable for both inorganic ammonia-nitrogen wastewater and organic amine nitrogen wastewater, the TKN removal rate of high-concentration ammonia-nitrogen wastewater can reach above 85% after one time of treatment through the method, the organic amine nitrogen removal rate is above 90%, and a powerful guarantee is provided for subsequent biochemical treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and relates to a pretreatment method for ammonia nitrogen wastewater. Background technique [0002] Chemical wastewater with high nitrogen content, such as pharmaceutical factory wastewater, coking wastewater, synthetic ammonia industrial wastewater, nitrogen fertilizer wastewater, etc. The wastewater of these enterprises not only has high ammonia nitrogen content, but also has low C / N ratio and high toxicity. This kind of wastewater has always been difficult to treat in China. one. [0003] At present, the methods for treating ammonia nitrogen wastewater mainly include physical, chemical and biological methods. Physical methods include reverse osmosis, distillation, and soil irrigation; chemical methods include ion exchange, air stripping, chemical precipitation, breakpoint chlorination, electrodialysis, electrochemical treatment, and catalytic cracking. Due to the characteristics ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58B01J23/889
Inventor 杨志林李学字刘锦生王开春张彬彬刘娟袁丽娟
Owner BLUESTAR LEHIGH ENG INST CO LTD