Total nitrogen treatment method suitable for high concentration and degradation-resistant organic wastewater

A treatment method, a technology for organic wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the instability of effluent ammonia nitrogen and the inability to obtain effluent total nitrogen Effective control and other problems, to achieve high tolerance, sludge sedimentation performance and dehydration performance, cost-effective effect

Active Publication Date: 2015-07-08
BLUESTAR LEHIGH ENG INST CO LTD
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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a more reasonable total nitrogen removal process for the deficiencies of the prior art, which can completely solve the ammonia nitrogen in the effluent of organic nitrogen-containing wastewater containing high COD and NH3-N concentration. Unstable and the total nitrogen in the effluent cannot be effectively controlled

Method used

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  • Total nitrogen treatment method suitable for high concentration and degradation-resistant organic wastewater
  • Total nitrogen treatment method suitable for high concentration and degradation-resistant organic wastewater

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Embodiment 1

[0034] Embodiment 1, with reference to figure 1 , a treatment method suitable for high-concentration, refractory organic wastewater total nitrogen, characterized in that: the method comprises the following steps:

[0035] (1) High-concentration, refractory organic nitrogen-containing wastewater enters the pre-anaerobic tank, and a certain hydraulic retention time is controlled to break the chain of macromolecular substances into small molecular substances, transform organic nitrogen into inorganic nitrogen, and the effluent enters the first sedimentation tank. Part of the sludge in the first sedimentation tank is returned to the pre-anaerobic tank to supplement the sludge, and part of it is discharged to the third sedimentation tank in the form of excess sludge;

[0036] (2) The effluent from the first sedimentation tank enters the first-level A / O treatment process; the first-level aerobic tank carries out the degradation of organic matter and the nitrification of ammonia n...

Embodiment 2

[0040] Embodiment 2, in the processing method described in embodiment 1: described denitrification bacteria agent is selected from: nitrifying bacteria group ( Nitrobacter ), nitrosative bacteria ( Nitrosobacteria ), yeast flora ( Saccharomyces ), Bacillus subtilis flora ( Bacillus subtilis ), photosynthetic bacteria flora ( Photosynthetic Bacteria ) in one or more.

Embodiment 3

[0041] Example 3, in the treatment method described in Example 1 or 2: the form of the pre-anaerobic tank in step (1) is selected from one of UASB, EGSB, IC, SMPA, ABR, ASBR, and LARAN.

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Abstract

The invention discloses a total nitrogen treatment method suitable for high concentration and degradation-resistant organic wastewater. The method includes the pre-anaerobic tank treatment and two-stage A / O (anaerobic / oxic) treatment process, wastewater successively passes through a pre-anaerobic tank, a first settling tank, a first-level anaerobic tank (A1), a first-level oxic tank (O1), a second settling tank, a second -level anaerobic tank (A2), a second -level oxic tank (O2) and a third settling tank for processing; a denitrification microbial inoculums can be added into the first oxic tank and the second oxic tank for biological enhancement. The total nitrogen treatment method is simple in technological process, the pre-anaerobic tank is used in the front stage to reduce the effect of organic loading rate on a subsequent biochemical system, the biodegradability of the high concentration and degradation-resistant nitrogen-containing organic wastewater can be improved, at the same time, the organic state ammonia nitrogen is transformed into inorganic state nitrogen, and subsequent biological nitrification and denitrification can be facilitated. By use of the two-stage A / O (anaerobic / oxic) treatment process for processing the wastewater, the total nitrogen removal efficiency can be effectively improved. The method is suitable for processing degradation-resistant nitrogen-containing wastewater such as coking wastewater, pharmaceutical wastewater, monosodium glutamate wastewater, fermentation wastewater and the like, and also can be used for processing domestic sewage and municipal sewage.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method suitable for total nitrogen in high-concentration, refractory organic wastewater. Background technique [0002] The treatment of high-concentration refractory organic wastewater is a recognized problem in domestic and foreign sewage treatment circles. For this type of wastewater, there are currently more researches at home and abroad on industrial wastewater such as coking wastewater, pharmaceutical wastewater (including traditional Chinese medicine wastewater), petrochemical / oil wastewater, textile / printing and dyeing wastewater, chemical wastewater, and paint wastewater. The so-called "high concentration" refers to the high concentration of organic matter (in terms of COD) in this type of wastewater, generally above 2000 mg / L, and some even as high as tens of thousands to hundreds of thousands of mg per liter; the so-called "refractory" is Refers to the low b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/12
Inventor 张彬彬刘志奎李学字田凤蓉杨志林云干刘娟郭涛
Owner BLUESTAR LEHIGH ENG INST CO LTD
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