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Method and device for cooperative flue gas desulfurization and sewage organic matter degradation and denitrification

A technology of organic matter and flue gas, applied in the field of pollution control, can solve the problems of large excess sludge output, etc., and achieve the effects of large output, efficient desulfurization, and efficient removal

Inactive Publication Date: 2015-07-29
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process combines flue gas desulfurization waste liquid with urban domestic sewage treatment, which can not only efficiently remove organic matter and denitrification in sewage, but also solve the problem of large excess sludge production

Method used

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  • Method and device for cooperative flue gas desulfurization and sewage organic matter degradation and denitrification
  • Method and device for cooperative flue gas desulfurization and sewage organic matter degradation and denitrification
  • Method and device for cooperative flue gas desulfurization and sewage organic matter degradation and denitrification

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Effect test

Embodiment 1

[0081] Example 1 A device for purifying sewage with flue gas desulfurization waste liquid

[0082] Such as figure 1 As shown, the present invention provides a kind of device that purifies sewage with flue gas desulfurization waste liquid, and this device comprises flue gas dedusting desulfurization spray tower 1, mixing pool 3, sulfite reduction reactor 4, denitrification reactor 6 and A nitrification reactor 7, the flue gas dedusting and desulfurization spray tower 1, a mixing tank 3, a sulfite reduction reactor 4, a denitrification reactor 6 and a nitrification reactor are connected in sequence through a main water inlet pipeline through 7, and the reaction Between the nitrification reactor 6 and the nitrification reactor 7 there are return pipelines 71 and 72 which can return the effluent from the nitrification reactor 7 to the denitrification reactor 6;

[0083] A sedimentation tank 2 is provided between the flue gas dedusting and desulfurization spray tower 1 and the m...

Embodiment 2

[0092] Embodiment 2 A method of purifying sewage with flue gas desulfurization waste liquid

[0093] combine figure 1 (Schematic diagram of flue gas dedusting, desulfurization and sewage treatment equipment) and figure 2 (Schematic diagram of the flow of the sewage purification treatment method) The sewage treatment process is explained as follows.

[0094] 1. Pretreatment before operation of the sewage purification device with flue gas desulfurization waste liquid

[0095] (1) Sludge inoculation and acclimatization of sulfite acid reduction reactor 4

[0096] The sludge of sulfite reduction reactor 1 is taken from the secondary settling tank of Tung Chung Sewage Treatment Plant in Hong Kong (as long as it is activated sludge containing sulfate reducing bacteria), and is mixed with flue gas desulfurization waste liquid and domestic sewage As the influent of the reactor, the sludge in the reactor is domesticated and cultivated, and the dissolved oxygen concentration is ...

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Abstract

The invention discloses a method and a device for cooperative flue gas desulfurization and sewage organic matter degradation and denitrification. Flue gas is subjected to desulfuration and purification through a spraying tower, and desulfurized waste liquid and sewage flow into a sulfite reduction reactor to be subjected to anaerobic biological treatment, so that organic matters in the sewage are degraded, and meanwhile sulfite is reduced; then the sewage and a reflux liquid in a nitration reactor are mixed, and flow into a denitrification reactor, nitrate in the sewage is reduced into nitrogen gas to realize nitrogen element removal, and sulfide in the sewage is oxidized into sulfate or elemental sulfur in an oxygen deficiency manner to realize part desulfuration; then the sewage flows into the nitration reactor again, organic matters in the sewage is further degraded, meanwhile ammonia nitrogen is oxidized into nitrate, and is removed after flowing back into the denitrification reactor; the rest sulfide is completely oxidized into sulfate, and the sewage is purified, and can be directly discharged. The average removal rate of the organic matters in the sewage is 95%, the ammonia nitrogen removal rate is 90%, the total nitrogen removal rate is above 70%, and the sulfide removal rate is 99.9%. The flue gas-sewage cooperative treatment process capable of realizing efficient flue gas desulfuration, sewage decarbonization and denitrogenation at the same time is established, flue gas desulfurized waste liquid is treated, and sewage is purified.

Description

technical field [0001] The invention belongs to the field of pollution control, and relates to a new process and device for synergistic flue gas desulfurization and sewage organic matter removal and denitrification treatment. Background technique [0002] Since 1914, the aerobic activated sludge process has been widely used in various sewage treatment, such as urban domestic wastewater, industrial wastewater and agricultural wastewater and so on. The principle of the aerobic activated sludge method is to introduce relevant microorganisms into the sewage treatment process, and achieve the removal of organic matter and ammonia nitrogen by controlling the conditions. Although the activated sludge process can effectively remove organic matter in sewage, its main defect is that a large amount of residual sludge will be generated during the biodegradation of organic matter. According to research, 234g of sludge will be produced per cubic meter of domestic sewage. dry sludge. As ...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50B01D47/06C02F3/30C02F3/34C02F103/18
CPCY02P70/10
Inventor 江峰张泽锋张良
Owner SOUTH CHINA NORMAL UNIVERSITY
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