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Short-path deep biological denitrogenation method for city garbage percolate

A technology for biological denitrification and municipal waste, which is applied in aerobic and anaerobic process treatment to achieve the effect of saving aeration costs

Active Publication Date: 2007-01-03
JIANGSU YULONG ENVIRONMENTAL PROTECTION
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complete nitrification of high-ammonia nitrogen landfill leachate is a difficult problem in sewage treatment, and the stable and efficient short-range biological denitrification of landfill leachate is a major breakthrough in leachate treatment, which has not been reported in the existing domestic and foreign literature

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  • Short-path deep biological denitrogenation method for city garbage percolate
  • Short-path deep biological denitrogenation method for city garbage percolate

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Experimental program
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Effect test

specific Embodiment approach 1

[0042] Embodiment 1 (treatment of landfill leachate in early stage)

[0043] Combined with examples such as figure 2 Shown, the running operation procedure of technique of the present invention:

[0044] The water used for the experiment was taken from a regulating tank of a landfill in Beijing. The leachate was dark black, viscous, and had a foul smell. The water quality of the leachate: COD 7000~25000mg / l; BOD53500~14000mg / l; NH4+-N1250~2450mg / l; SS 2000~4000mg / l; alkalinity 8000~11000mg / l; TP 9~15mg / l; pH7.2~7.9. Sampling and analysis are performed every two days, and the analysis methods used in the test are all standard methods issued by the State Environmental Protection Agency. The leachate is a typical municipal solid waste leachate, with high concentrations of organic matter and ammonia nitrogen, but relatively low heavy metal content. test system such as figure 1 As shown, it consists of two levels of UASB and A / O pool. UASB1 has an inner diameter of 5cm, a he...

specific Embodiment approach 2

[0055] Embodiment 2 (processing of landfill leachate in late stage)

[0056] The "two-stage UASB+A / O" system is used to treat typical late-stage municipal solid waste leachate, the backflow treatment water is denitrified in the first-stage UASB, the methane-producing reaction is carried out in the second-stage UASB, and the A / O reactor is used for NH 4 + -N short-cut nitrification reaction. System organic matter removal rate = 50-70%, system effluent COD = 1000-1500mg·L -1 . When the operating temperature is 17 ~ 29 ℃, stable NO 2 - - Short-range nitrification with N accumulation rate of 90-99%. NH during the test 4 + -N Load (ALR)=0.28~0.60kgNH 4 + -N·m -3 d -1 , NH 4 + -N nitration rate=90~100%. When ALR4 + -N·m -3 d -1 , nitrification rate > 98%, effluent NH 4 + -N-1 . In influent COD / NH 4 + - When N=2-3, the removal rate of inorganic nitrogen TIN=70-80%. The activated sludge was detected by fluorescence in situ hybridization (FISH), and the results s...

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Abstract

The short-path deep biological denitrogenation method for city garbage percolate belongs to the field of sewage treating technology. The short-path deep biological denitrogenation process is one two stage UASB+A / O process including the reflowing short-path denitrification in the first UASB stage, the methane generating reaction in the second UASB stage and the short-path nitrification in the A / O reactor. The short-path nitrification is realized through regulating water reflux ratio of water based on the C / N ratio of influent water to make the anoxic area in the A / O reactor possess free ammonia concentration of 30-70mg / L to inhibit NO2-N oxidizing bacteria, rather than NH4+-N oxidizing bacteria and oxidize 90-99%of NH4+-N, and controlling the aeration time effectively and accurately with the 'ammonia valley' to maintain stable short-path nitrification. Then, the short-path biological denitrification is completed through treating refluxed water and refluxing sludge.

Description

technical field [0001] The invention relates to a method for removing biochemical organic matter and high ammonia nitrogen in high-ammonia-nitrogen organic wastewater through stable and efficient short-range nitrification and denitrification, which belongs to the technical field of biochemical sewage biological treatment and is suitable for municipal solid waste leachate and other anaerobic sludge such as sludge Treatment of high ammonia nitrogen organic industrial wastewater such as digestive juice and aquaculture wastewater. Background technique [0002] At present, the annual total amount of garbage in our country is 240 million tons, and the annual growth rate of urban domestic garbage in recent years is above 8% to 10%. At present, about 90% of the garbage in our country is disposed of by landfill, and landfill will produce a large amount of landfill leachate. Landfill leachate is a kind of organic wastewater with complex components and high ammonia nitrogen. The natio...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 彭永臻张树军王淑莹
Owner JIANGSU YULONG ENVIRONMENTAL PROTECTION
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