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Sequential air lifting circulation waste water biological treatment reactor and its process

An airlift circulation and biological treatment technology, applied in the field of biological treatment process and reactor device, can solve the problems of low degradation efficiency, poor adaptability, poor denitrification performance, etc., and achieve high mass transfer efficiency, good performance and efficient treatment Effect

Inactive Publication Date: 2007-02-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims at the problems of poor adaptability and low degradation efficiency of traditional activated sludge wastewater biological treatment process and reactor to high-concentration refractory organic pollutants and poor denitrification performance of biofilm reactor (such as biological fluidized bed), etc. , proposed a new type of high-efficiency air-lift internal circulation wastewater treatment bioreactor and process that uses anoxic-anaerobic-aerobic alternately to realize the dual oxidation of refractory organic pollutants and biological denitrification in the same reactor The goal is to make the high-concentration and refractory nitrogen-containing industrial organic wastewater be discharged up to the standard after treatment, and at the same time realize the reduction of excess sludge by more than 80% (compared to the traditional activated sludge process)

Method used

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  • Sequential air lifting circulation waste water biological treatment reactor and its process
  • Sequential air lifting circulation waste water biological treatment reactor and its process

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Embodiment 1

[0037] The target wastewater of the reaction device and wastewater treatment process of the present invention is industrial organic wastewater containing high concentration / refractory organic pollutants and high ammonia nitrogen, such as landfill leachate, yeast wastewater, coking wastewater, monosodium glutamate wastewater, etc. The range of wastewater quality characteristics that the reactor can adapt to is: COD Cr : ≤1500mg / L, NH 4 + -N:≤300mg / L. Wastewater with a concentration higher than this limit can also achieve good treatment effects when entering the reactor with an appropriate drainage ratio (that is, controlling the influent dilution ratio).

[0038] The technical scheme adopted by the present invention is: adopt a kind of circular structure, the air-lift type inner circulation bioreactor device that contains new-type inner member, its height-to-diameter ratio is 3~6: 1, such as figure 1 shown.

[0039] The structure of the novel bioreactor is as follows: a thr...

Embodiment 2

[0060] The present invention is an integrated reactor. In addition to the intermittent operation of a single reactor introduced in Example 1, it can also be a plurality of reactors connected in parallel and continuously fed into water, that is, a sequence of two or more batches. A wastewater biological treatment reaction system composed of an airlift circulation wastewater biological treatment reactor, such as figure 2 shown.

[0061] figure 2 In the shown embodiment 2, 4 reactors (I-IV) with the same volume are connected in parallel. The structures, processes and principles of the four reactors are the same as those described in Example 1.

[0062] During operation, the operating cycle settings of the four reactors are consistent. When reactor I completes the water intake, it enters the reaction period. At this time, II starts to enter the water, and so on. The reaction cycle (water intake-reaction-standstill-drainage) enters the state of idle (waiting for water intake)....

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Abstract

The efficient sequencing batch type air lifting circular flow waste water treating bioreactor in alternative anoxia-anaerobic-aerobic process includes one squared or cylindrical reactor unit, one water inlet unit and one water outlet unit as well as one aerating system. The reactor unit includes one reactor body, one triphase separator, conic bottom, air lifting circular flow guide tube and upper deflecting baffle. The present invention also discloses corresponding technological process. By means of the sequencing batch type air lifting circular flow waste water treating bioreactor and the corresponding technological process, double target of oxidizing non-degradable organic pollutant and biological denitrification may be reached in the same reactor, the treated high concentration non-degradable nitrogenous industrial organic waste water may reach the drainage standard, and the residual sludge amount may be reduced by over 80%.

Description

technical field [0001] The invention belongs to the technical field of water pollution control application, and relates to a biological treatment process and a reactor device for industrial organic waste water containing high-concentration refractory organic pollutants and high-concentration ammonia nitrogen. Background technique [0002] A large amount of high-concentration toxic / refractory organic nitrogen-containing industrial wastewater is discharged during industrial production, such as yeast wastewater, monosodium glutamate waste liquid, coking wastewater, soy sauce wastewater, landfill leachate, etc., and its water quality is characterized by high concentrations of toxic and refractory organic pollutants and high concentrations of ammonia nitrogen. The treatment of this kind of wastewater generally adopts the combined process of anaerobic / aerobic and nitrification / denitrification, such as A 2 / O, AB method, SBR process, etc. These processes are the traditional activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 李平吴锦华
Owner SOUTH CHINA UNIV OF TECH
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