Treatment method and apparatus for mifepristone wastewater

A technology for mifepristone and wastewater treatment, which is applied in natural water body treatment, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc. Ideal and other issues, to achieve the effect of saving oxygen consumption, reducing ammonia nitrogen load, and saving power costs

Inactive Publication Date: 2011-04-27
SOUNDGRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in the treatment of this wastewater, the treatment efficiency of organic matter and ammonia nitrogen and other pollutants in the wastewater is generally low due to the unreasonable design of process parameters, and it is difficult to meet the design target requirements, especially the removal effect of ammonia nitrogen is not ideal.

Method used

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  • Treatment method and apparatus for mifepristone wastewater
  • Treatment method and apparatus for mifepristone wastewater
  • Treatment method and apparatus for mifepristone wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The treatment equipment adopted in a kind of mifepristone production wastewater treatment method provided by the present embodiment is as follows: figure 1 As shown, the equipment includes: regulating tank unit 1, facultative oxygen reactor 2, aerobic reactor 3, secondary settling tank 4, coagulation reactor 5 and coagulation sedimentation tank 6; wherein, regulating pond unit 1, facultative oxygen The reactor 2, the aerobic reactor 3, the secondary sedimentation tank 4, the coagulation reaction tank 5 and the coagulation sedimentation tank 6 are connected in sequence, and the aerobic reactor 2 and the aerobic reactor 3 are combined into an integrated structure; the adjustment tank unit The water inlet pipe of 1 is connected to the mifepristone wastewater inlet pipe; the aerobic reactor 3 is connected to the facultative oxygen reactor 2 through the mixed liquid return pipe 7 times; the sludge outlet C of the secondary sedimentation tank 4 is passed through the sludge ret...

Embodiment 2

[0036] In the present embodiment, mifepristone production wastewater treatment equipment such as figure 2 As shown, each structure of this treatment equipment is the same as that of the treatment equipment in Embodiment 1, and the difference with the treatment equipment of Implementation 1 is that the concurrent oxygen reactor of the equipment is divided into two sections by a partition wall with a through hole. This structure of facultative oxygen reactor is beneficial to the separation and enrichment of facultative and anaerobic microorganisms, and improves the reaction rate of denitrification and anammox; in addition, the facultative oxygen reactor and aerobic reactor of this equipment are built separately The split structure, the facultative aerobic reactor and aerobic reactor of this split structure is conducive to adapting to the needs of the sewage treatment project site, with strong adaptability and convenient construction.

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Abstract

The invention discloses a mifepristone wastewater treatment method and a treatment equipment thereof. The method comprises the following steps: (1) adding an acid liquor in the treated mifepristone production wastewater, and adjusting the pH value of the wastewater to 7.8-8.2; (2) introducing the wastewater after the pH value is adjusted into a facultative reactor for hydrolysis and denitrification, and introducing the facultative reactor water effluent into an aerobic reactor in which CODCr is removed and ammonia-nitrogen in the wastewater is oxidized; and (3) further removing the CODCr and NH3-N after the aerobic reactor effluent is subjected to coagulating sedimentation treatment, and discharging the effluent. The contents of the CODCr and the NH3-N in the treated mifepristone wastewater meet the first class standard of the national sewage comprehensive emission standard (GB8978-1996), and the content of the effluent ammonia-nitrogen is less than 2mg / l, thereby saving power cost, improving the efficiency of removing the ammonia-nitrogen and lowering the treatment cost, and the treatment cost per ton of wastewater is only 3.3 yuan.

Description

technical field [0001] The invention relates to a wastewater treatment technology, in particular to a treatment method and equipment for degrading COD and ammonia nitrogen in mifepristone wastewater, and belongs to the field of environmental protection management. Background technique [0002] Mifepristone (mifepristone) production wastewater comes from the remaining chemical raw materials, intermediate products and by-products, organic solvents, etc. of the mifepristone chemical synthesis workshop. Wastewater contains a large number of pollutants that inhibit the growth and metabolism of microorganisms, and contains high concentrations of ammonia nitrogen and organic pollutants. It is one of the highly polluting and difficult-to-treat industrial wastewater. The treatment technologies for mifepristone wastewater at home and abroad include: physical and chemical methods, biochemical methods and methods combining physical and biochemical methods. Among them, the denitrificati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/66C02F3/30C02F1/52C02F103/36
Inventor 陈劲松李天增屈佳玉孙丽波李京旭许梅花
Owner SOUNDGRP CO LTD
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