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Ammonia-contained waste water high-efficiency biochemical processing method

A biochemical treatment and waste water technology, which is applied in the treatment of ammonia-containing waste water and waste water with high ammonia concentration and low COD concentration. It can solve the problems of difficult control of nitrosation stage, unstable system and low treatment load.

Active Publication Date: 2010-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still problems such as low processing load, system instability, and difficulty in controlling the nitrosation stage, which limit the large-scale industrial application of these methods.

Method used

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  • Ammonia-contained waste water high-efficiency biochemical processing method
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  • Ammonia-contained waste water high-efficiency biochemical processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 contains the cultivation of nitrous bacteria flora inoculum

[0032] The nitrifying bacteria cultivated in the laboratory are used as the inoculum, and the MLSS after inoculation is 1.0g / L, and the ammonia-containing wastewater with a self-prepared concentration of 300mg / L (COD value 30mg / L) is used as the reactor feed water, and the pH is controlled at 7.9 , Control the temperature at 20°C and the dissolved oxygen concentration is about 2.0-3.0mg / L. Water is fed intermittently first, and ventilation is stopped after 24 hours of reaction. After natural settlement, the supernatant is discharged, leaving bacteria, and then new ammonia-containing wastewater is added to the reactor. When the removal rate of ammonia nitrogen is greater than 90%, increase the concentration of ammonia nitrogen in the influent, and the range of each increase is 100mg / L. After 8 days, the concentration of ammonia nitrogen in the influent reaches 700mg / L. At this time, it is changed...

Embodiment 2

[0033] Embodiment 2 contains the cultivation of nitrous bacteria flora inoculum

[0034] Using nitrosative bacteria enriched in the laboratory and aerobic activated sludge from a sewage plant as the inoculum, the MLSS after inoculation was 0.5g / L, and the high-ammonia wastewater from a catalyst factory was diluted to 200mg / L (COD value 17mg / L L) As the reactor water intake, the pH is controlled at 8.0; the temperature is controlled at 35 ° C, and the dissolved oxygen concentration is 4.5 to 5.5 mg / L; the water is intermittently fed first, and the ventilation is stopped after 24 hours of reaction, and the supernatant is removed after natural settlement. Leave the bacteria, and then add new ammonia-containing wastewater to the reactor. When the ammonia nitrogen removal rate is greater than 90%, reduce the dilution factor of the original wastewater to increase the ammonia nitrogen concentration in the influent, and the increase is 80mg / L each time; After 9 days, the ammonia nitro...

Embodiment 3

[0035] Embodiment 3 handles the expanded cultivation of the microbial flora of ammonia-containing wastewater

[0036] Carry out the enlarged culture of thalline with the nitrous bacterium flora that embodiment 1 obtains and activated sludge as inoculum, the inoculum size of nitrous bacterium flora is 0.5g / L by MLSS, and the activated sludge dosage is reactor 30% of the volume, the concentration of ammonia nitrogen in the influent is 1500mg / L, and the COD is 46mg / L. The pH is controlled at 7.9, the temperature is controlled at 25°C, and the dissolved oxygen concentration is 2.0-3.0 mg / L. The culture method of supplementing ammonia salt in batches is adopted, adding once every 24 to 48 hours. After supplementing ammonia salt, the concentration of ammonia nitrogen in the culture solution is higher than 1200mg / L. After 10 days of cultivation, the MLSS is 2.8g / L. After that, the ammonia nitrogen is removed After the natural sedimentation, remove the supernatant and leave the bacte...

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Abstract

The invention relates to an ammonia-contained waste water high-efficiency biochemical processing method which comprises the following steps of: firstly putting an inoculant into a bioreactor for extensive culture, wherein the inoculant is a microbial flora of Nitrosomonas sp., Denitrobacter sp., Rhodanobacter sp. and the like, and high ammonia nitrogen and high pH value are used as the conditions of the extensive culture; throwing the microbial flora after the extensive culture or a mixture of the microbial flora and aerobic activated sludge of a sewage plant into a nitration reaction pond to process high-ammonia nitrogen low-COD waste water. The processing method has nonstrict requirements for a temperature range and dissolved oxygen concentration. The method not only has the advantages of energy consumption reduction, carbon source saving, sludge production capacity decrease and the like, but also has the characteristics of high volume loading of ammonia nitrogen removal, good processing effect, strong impact resistant capability, stable system operation and the like and is a processing method with stronger synthesis.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for treating ammonia-containing wastewater, which can realize the ammonia-containing wastewater discharged in oil refining and catalyst production, especially the high ammonia concentration and low COD concentration produced in the catalyst production process waste water treatment. Background technique [0002] In recent years, with the development of industry and agriculture, the discharge restrictions on industrial wastewater (such as oil refining wastewater, catalyst wastewater, synthetic ammonia wastewater), landfill seepage water and domestic sewage have become more and more stringent, and sewage treatment technology has received more and more attention. , especially the up-to-standard discharge of ammonia-containing wastewater has become a difficult problem in the field of environmental protection. Although ammonia nitrogen in wastewater can b...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 黎元生高会杰乔凯张全
Owner CHINA PETROLEUM & CHEM CORP
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