Method for treating rubbish percolates of different times for deep denitrification by using bipolar USAB+A/O+SBR process

A technology for deep denitrification of landfill leachate, applied in the field of deep denitrification of landfill leachate, can solve the problems of rare successful application of biological denitrification, complex control factors of nitrite accumulation, and few researches

Inactive Publication Date: 2010-08-18
LANZHOU SHUISEN ELECTRONICS TECH
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Problems solved by technology

[0004] However, at present, there are not many studies on the realization of complete nitrification and short-range nitrification of wastewater with high ammonia nitrogen concentration.
And so far, the successful application of biological denitrification through the short-cut nitrification pathway in actual engineering is rare.
The

Method used

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  • Method for treating rubbish percolates of different times for deep denitrification by using bipolar USAB+A/O+SBR process
  • Method for treating rubbish percolates of different times for deep denitrification by using bipolar USAB+A/O+SBR process

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[0052] Combined example: the experimental water is taken from Beijing Liulitun landfill, and its water quality is as follows: COD=3000~5000mg·L-1, NH 4 + -N=1600~2400mg·L -1 , TP=9~15mg·L -1 , TN=1700~2700mg·L -1 , NO x - -N=0.5~15mg·L -1 , pH=7~8. COD, ammonia nitrogen, nitrite nitrogen, nitrate nitrogen and other routine water quality indicators all adopt national standard methods. TON, TN, TOC, IC, TC, etc. adopt TN / TOC analyzer (Multi N / C3000, Jena, Germany). The effective volumes of UASB1 and UASB2 are 4.25L and 8.25L, respectively. The A / O reactor is made of plexiglass and has an effective volume of 15L. It is divided into 10 compartments on average. The first compartment is an anoxic zone, and the rest are aerobic zones. The SBR reactor is 8L and processes 3L of water per cycle.

[0053] Such as figure 1 Shown, the concrete steps that the present invention handles landfill leachate are as follows:

[0054] (1) The leachate used in the test enters the primary...

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Abstract

The invention discloses a method for treating rubbish percolates of different times for deep denitrification by using a bipolar USAB+A/O+SBR process, which belongs to the technical field of biological denitrification and is suitable for performing advanced treatment on the rubbish percolates. In the method, water output by an A/O reactor passes through a secondary sedimentation tank, then part of the water flows back into a first-stage UASB reactor to perform denitrification, so the method fully uses sufficient carbon sources of raw water, realizes an efficient denitrification efficiency, and fully uses the characteristic that the rubbish percolates contain high-concentration organic substances. Dissolved oxygen (DO), an oxidation-reduction potential (ORP) and a pH value sensor are used for monitoring the degradation and the short-range nitrification/denitrification processes of the organic substances in the reactor, and the short-range nitrification/denitrification processes can be well controlled according to monitored pH values and ORP values. The average ammonia nitrogen concentration of final yielding water is 2 mg/L, the total nitrogen concentration is lower than 40 mg/L, and the ammonia nitrogen removal rate and the total nitrogen removal rate are above 98 percent. The method completely depends on biological treatments, reduces the cost and simplifies the process. The method performs denitrification on the rubbish percolates, not only realizes complete nitrification but also realizes short-range nitrification, and realizes the deep removal of the nitrogen in the rubbish percolates.

Description

technical field [0001] The invention relates to a deep denitrification method for treating landfill leachate, which belongs to the technical field of biological denitrification of urban domestic waste leachate through combined anaerobic and aerobic processes, and is suitable for advanced treatment of landfill leachate. Background technique [0002] Due to the nature, economic strength and technical level of our country's garbage, more than 90% of the garbage disposal is to adopt the sanitary landfill method. However, after the sanitary landfill of garbage, due to the fermentation of garbage, the infiltration of rainwater and the rise of groundwater level, there will be a considerable amount of leachate in the landfill. Landfill leachate is a kind of high-concentration organic wastewater with large changes in water quality and quantity, imbalance in the proportion of microbial nutrient elements, high ammonia nitrogen content, and complex components. The concentration of orga...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30
Inventor 彭永臻吴莉娜
Owner LANZHOU SHUISEN ELECTRONICS TECH
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