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Denitrification processing method of coking wastewater and processing arrangement

A technology of coking wastewater and treatment method, which is applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, and multi-stage water/sewage treatment, etc., can solve the problems of secondary pollution, high treatment cost, and difficulty in popularization and application, and saves power costs. , The effect of saving power costs and reducing ammonia nitrogen load

Inactive Publication Date: 2011-09-07
SOUNDGRP CO LTD
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  • Application Information

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Problems solved by technology

At present, in the treatment of coking wastewater, the denitrification efficiency of coking wastewater is generally low due to the unreasonable design of process parameters, and it is difficult to meet the design target requirements, especially the total nitrogen removal effect is not ideal
Physicochemical denitrification processes include air stripping method, selective ion exchange method, breakpoint chlorination method, and magnesium ammonium phosphate precipitation method. These physical and chemical denitrification methods are difficult to popularize and apply due to high treatment costs and secondary pollution.

Method used

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  • Denitrification processing method of coking wastewater and processing arrangement
  • Denitrification processing method of coking wastewater and processing arrangement
  • Denitrification processing method of coking wastewater and processing arrangement

Examples

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Embodiment 1

[0025] In this embodiment, the denitrification treatment method for coking wastewater includes the following steps: pretreatment, biochemical treatment aerobic reactor, biochemical treatment aerobic reactor, biochemical treatment secondary sedimentation tank, coagulation treatment (coagulation reaction tank, mixing Condensation and sedimentation tank), mainly to convert part of the ammonia nitrogen in the wastewater into nitrate and nitrite in the aerobic reactor, nitrate and part of the nitrite are denitrified and denitrified in the aerobic reactor, part of the nitrite Anaerobic ammonium oxidation denitrification is performed in a facultative reactor. This processing method uses the figure 1 The processing equipment shown specifically includes: air flotation tank unit 1, aerobic reactor 2, aerobic reactor 3, secondary sedimentation tank 4, coagulation reaction tank 5, coagulation sedimentation tank 6, mixed liquid return pipe 7. Sludge return pipe 8 and regulating valve (reg...

Embodiment 2

[0037] In this embodiment, the coking wastewater treatment denitrification treatment equipment such as figure 2 As shown, the anaerobic reactor of this equipment is divided into two parts by a partition wall, and a through hole is provided on the partition wall, and the two parts separated inside the anaerobic reactor are connected through the through hole. This structure is beneficial to the facultative and anaerobic The separation and enrichment of aerobic microorganisms increase the reaction rate of denitrification and anammox. The other structures of the equipment are the same as those in Embodiment 1. The treatment process of using this equipment to treat coking wastewater for denitrification is also the same as that of Example 1.

[0038] In summary, in the embodiment of the present invention, a biological denitrification process combining common nitrification / denitrification, short-cut nitrification, denitrification and anammox is realized through the cooperation of fa...

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Abstract

The invention discloses a method and a device for removing nitrogen from coking wastewater. The method comprises the pretreatment and biochemical treatment of a facultative reactor, the biochemical treatment of an aerobic reactor, the biochemical treatment of a secondary sedimentation tank, coagulation treatment (of a coagulation reaction or a coagulation sedimentation tank) and other steps, so as to form a biological nitrogen removal process combining nitrification / denitrification, shortcut nitrification, denitrification and anaerobic ammonium oxidation. The method has the advantages that the method saves power cost by 10 to 18 percent; the water treatment cost per ton of the method is between 3.2 and 3.2 yuan; and the method is stable in operation and convenient to maintain, and has effluent COD <Cr> below 100 mg / l, ammonia nitrogen below 5 mg / l and total nitrogen below 20 mg / l.

Description

technical field [0001] The invention relates to a wastewater treatment technology, in particular to a treatment method and equipment for ammonia nitrogen and total nitrogen in coking wastewater, belonging to the technical field of coking wastewater treatment. Background technique [0002] Coking wastewater has complex components, containing high concentrations of ammonia nitrogen, phenol, cyanide, and a variety of aromatic compounds, and is one of the most difficult industrial wastewater to treat. The treatment technologies of coking wastewater at home and abroad include: physical and chemical methods, biochemical methods and methods combining physical and biochemical methods. Among them, the denitrification methods are mainly biochemical methods, and the biochemical methods include anoxic-aerobic (A / O), anaerobic-anoxic-aerobic (A / A / O), aerobic-anoxic-aerobic ( O-A-O), anoxic-aerobic-aerobic (A-O-O), these treatment processes are all effective methods for denitrification o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/52C02F3/30C02F103/16
Inventor 文一波张辉明陈劲松王凯李天增张宝林
Owner SOUNDGRP CO LTD
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