Advanced nitrogen removal method for treating late landfill leachate with upflow anaerobic sludge blanket, anoxic/oxic and anaerobic ammonia oxidation reactor combined process

A flow-type anaerobic sludge and anaerobic ammonium oxidation technology, applied in water/sludge/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problem of strict control of reaction conditions and unfavorable process engineering Application and other issues, to achieve the effect of saving oxygen supply, reducing toxic effects, and reducing sludge generation

Active Publication Date: 2015-08-26
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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Problems solved by technology

However, most of the existing anaerobic ammonium oxidation studies use simulated sewage, and few studies use actual landfill leachate; at the same time, a single reactor is basically used, and the reaction conditions are strictly controlled, which is not conducive to the engineering of the process. application

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  • Advanced nitrogen removal method for treating late landfill leachate with upflow anaerobic sludge blanket, anoxic/oxic and anaerobic ammonia oxidation reactor combined process

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[0044] Combined example: the experimental water is taken from a landfill in Beijing, and its water quality is as follows: COD=2000~3000mg·L-1, NH 4 + -N=700~2000mg·L -1 , TP=9~15mg·L -1 , TN=1000~2300mg·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 integrated water tank and the intermediate water tank are made of stainless steel, and the effective volumes are 50L and 20L respectively. The effective volumes of UASB and ANAOR are 8.25L and 4.25L 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 secondary settling tank is made of plexiglass, its effective volume is 20L, and it can process 3L of wa...

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Abstract

The invention relates to an advanced nitrogen removal method for treating late landfill leachate with an upflow anaerobic sludge blanket (UASB), anoxic/oxic (A/O) and anaerobic ammonia oxidation reactor (ANAOR) combined process, and belongs to the field of biological nitrogen removal. The following difficult problems exist in late landfill leachate treatment: due to high ammonia nitrogen content, total nitrogen in outlet water is unlikely to meet the standard; a carbon source often needs to be additionally added, so that the landfill leachate treatment cost is greatly increased. The late landfill leachate is treated with the UASB, A/O and ANAOR combined process, and a biological treatment technology is enhanced, so that the landfill leachate treatment cost is reduced to the maximum extent. Through short-cut nitrification-anaerobic ammonia oxidation coupling, without additionally adding the carbon source, the removal effect and efficiency of ammonia nitrogen and total nitrogen are improved and a problem that ammonia nitrogen and total nitrogen in the outlet water of the late leachate do not meet the standard is solved. The method can be widely applied to treatment of high-ammonia-nitrogen-content wastewater and is especially suitable for treating the late landfill leachate filled for more than 5 years in urban garbage landfill sites.

Description

technical field [0001] The invention relates to a method for deep denitrification of late-stage landfill leachate, which belongs to the technical field of biological denitrification of municipal domestic waste leachate by short-range nitrification-anammox process, and is suitable for advanced treatment of late-stage landfill leachate. Through the short-range nitrification-anammox advanced treatment of the actual urban late-stage landfill leachate, the deep removal of ammonia nitrogen and total nitrogen can be achieved, so as to solve the problem that the total nitrogen of the late-stage landfill leachate biological treatment effluent does not meet the standard and the cost of adding carbon sources is high. Background technique [0002] Sanitary landfill is a common waste disposal method in developing countries, but after sanitary landfill of waste, a large amount of leachate will be produced. Landfill leachate is a type of difficult-to-treat sewage with large changes in wate...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 吴莉娜
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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