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Method for treating total nitrogen of nitrogen-containing chemical wastewater

A treatment method and technology for chemical wastewater, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as instability of effluent ammonia nitrogen and ineffective control of effluent total nitrogen, etc. Achieve the effects of low processing cost, reduced operating cost, and shortened process flow

Active Publication Date: 2012-08-15
BLUESTAR LEHIGH ENG INST CO LTD
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a more reasonable process design, which can completely solve the problems of unstable ammonia nitrogen in the effluent of nitrogen-containing wastewater and the inability to effectively control the total nitrogen in the effluent, which is suitable for nitrogen-containing waste water. Treatment method of total nitrogen in chemical wastewater

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  • Method for treating total nitrogen of nitrogen-containing chemical wastewater
  • Method for treating total nitrogen of nitrogen-containing chemical wastewater
  • Method for treating total nitrogen of nitrogen-containing chemical wastewater

Examples

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Embodiment 1

[0034] Embodiment 1, with reference to figure 1 , a treatment method suitable for total nitrogen in nitrogen-containing chemical wastewater, the method includes pre-aeration tank treatment and two-stage A / O treatment process;

[0035] There is an aeration device in the pre-aeration tank, through which part of COD and a large amount of organic matter are removed; the residence time of nitrogen-containing chemical wastewater in the pre-aeration tank is 6h, the temperature is 5°C; pH: 6, DO: 1mg / L, effective MLSS: 3500mg / L;

[0036] The wastewater treated in the pre-aeration tank enters the first-level A / O treatment process. The first-level A / O treatment process consists of a first-level aerobic tank and a first-level anaerobic tank. The first-level aerobic tank is used for the degradation of organic matter and ammonia nitrogen. Nitrification, denitrification in the first-level anaerobic tank, by adding an appropriate amount of glucose or other carbon sources to the first-level...

Embodiment 2

[0040] Embodiment 2, with reference to figure 1 , a treatment method suitable for total nitrogen in nitrogen-containing chemical wastewater, the method includes pre-aeration tank treatment and two-stage A / O treatment process;

[0041] There is an aeration device in the pre-aeration tank, which removes part of COD and a large amount of organic matter; the residence time of nitrogen-containing chemical wastewater in the pre-aeration tank is 24h, temperature: 40°C; pH: 10, DO: 5mg / L, effective MLSS: 6500mg / L;

[0042] The wastewater treated in the pre-aeration tank enters the first-level A / O treatment process. The first-level A / O treatment process consists of a first-level aerobic tank and a first-level anaerobic tank. The first-level aerobic tank is used for the degradation of organic matter and ammonia nitrogen. Nitrification, denitrification in the first-level anaerobic tank, by adding an appropriate amount of glucose or other carbon sources to the first-level anaerobic tank...

Embodiment 3

[0046] Embodiment 3, with reference to figure 1 , a treatment method suitable for total nitrogen in nitrogen-containing chemical wastewater, the method includes pre-aeration tank treatment and two-stage A / O treatment process;

[0047] There is an aeration device in the pre-aeration tank, through which part of COD and a large amount of organic matter are removed; the residence time of nitrogen-containing chemical wastewater in the pre-aeration tank is 12h, the temperature is 25°C; pH: 8, DO: 3mg / L, effective MLSS: 5000mg / L;

[0048] The wastewater treated in the pre-aeration tank enters the first-level A / O treatment process. The first-level A / O treatment process consists of a first-level aerobic tank and a first-level anaerobic tank. The first-level aerobic tank is used for the degradation of organic matter and ammonia nitrogen. Nitrification, denitrification in the first-level anaerobic tank, by adding an appropriate amount of glucose or other carbon sources to the first-lev...

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Abstract

The invention relates to a method for treating total nitrogen of nitrogen-containing chemical wastewater. The method comprises preaeration tank treatment and two stages of A / O (anoxic / oxic) treatment. The wastewater treatment is carried out through a preaeration tank, a first-stage anaerobic tank, a first-stage aerobic tank, a second-stage anaerobic tank, a second-stage aerobic tank and a sedimentation tank, wherein denitrifier agent can be added in the preaeration tank, the first-stage aerobic tank and the second-stage aerobic tank for biofortification. The method has simple technological process, can reduce the influence of organic load on the subsequent biochemical systems by using the preaeration tank at the previous stage, improves the wastewater treatment ability, shortens the technological process and reduces the operation cost. By using two stages of A / O process to treat the coal chemical industry wastewater, the removing efficiency of the total nitrogen can be effectively improved. The method provided by the invention is applicable to treating coking wastewater or non-degradable nitrogen-containing wastewater such as pharmacy wastewater, monosodium glutamate wastewater and fermenting wastewater, as well as domestic wastewater and municipal wastewater.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method suitable for the total nitrogen of nitrogen-containing chemical wastewater. Background technique [0002] With the development of industrial and agricultural production, more and more sewage is discharged, the types of wastewater are more complex, water pollution is becoming more and more serious, and eutrophication and algal blooms caused by nitrogen in wastewater are becoming more and more obvious. Therefore, all countries have set strict discharge standards for nitrogen-containing substances in wastewater. At present, developed countries such as the United States, France, Japan and other countries have strict discharge standards for effluent total nitrogen, while my country is still limited to the discharge requirements of ammonia nitrogen until the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) The first-level B standard pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34
Inventor 张彬彬王开春杨志林田凤蓉刘娟袁丽娟
Owner BLUESTAR LEHIGH ENG INST CO LTD
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