Landfill leachate treatment device based on anaerobic ammonium oxidation and its application method

Abstract

The invention relates to an anaerobic ammonia oxidation-based landfill leachate treatment device and a use method thereof. The device comprises a primary processing unit, a secondary processing unit and a tertiary processing unit which are connected in sequence through a pipeline system; the primary processing unit comprises a water inlet pump, a water distribution system, a first reactor, a three-phase separator, an effluent weir trough and an effluent return pipe; the secondary processing unit comprises a second reactor, a filler, an aerator and a first precipitation tank; the tertiary processing unit comprises a flocculation reaction tank, a second precipitation tank, a primary ozone-oxidation unit, a primary biological treatment unit, a secondary ozone-oxidation unit and a second biological treatment unit which are connected in sequence; the tertiary processing unit further comprises a flocculating agent adding device, an ozone generator, an ozone catalyst and an ozone aerator. The anaerobic ammonia oxidation-based landfill leachate treatment device has the advantages that the structure is simple, the design is reasonable, the wastewater treatment cost is low, an effluent can meet the national emission standards, and aeration energy consumption is reduced, so that zero emission of a landfill leachate is realized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a landfill leachate treatment device based on anaerobic ammonium oxidation and a use method thereof. Background technique [0002] The treatment of landfill leachate has always been an important issue in urban environmental governance, and the quality of its treatment directly affects the health of urban residents. Due to the wide sources of urban domestic sewage, various types of pollutants, high cost and difficulty in treatment, especially the landfill leachate from all walks of life in the city, its composition is complex, there are many pollutants, and there are a large number of toxic and harmful substances. At the same time, garbage The leachate is a typical wastewater with high ammonia nitrogen concentration and high organic matter concentration. The treatment of landfill leachate generally adopts the combination process of traditional nitrification and denitrific...

AI Technical Summary

Problems solved by technology

Due to the wide sources of urban domestic sewage, various types of pollutants, high cost and difficulty in treatment, especially the landfill leachate from all walks of life in the city, its composition is complex, there are many pollutants, and there are a large number of toxic and harmful substances. At the same time, garbage The leachate is a typical wastewater with high ammonia nitrogen concentration and high organic matter concentration. The treatment of landfill leachate generally adopts the combination process of traditional nitrification and denitrification biological treatment + UF + NF + RO. There are many problems in this process: (1) Due to biological The removal efficiency of the treatment process for TN is limited. A large amount of TN is removed by the membrane treatment process (NF+RO) at the back end of the biological treatment process. The operating pressure of the membrane system is high, the fouling is serious, and the cleaning is frequent. Many systems need to replace the membrane after less than half a year of operation. (2) Relying on reverse osmosis to ensure the standard discharge of effluent TN, the operating load of the membrane system is high, the failure rate increases, and the system guarantee rate is low; (3) Denitrification is seriously lacking in carbon sources, and a large amount of external carbon source

(4) NF and RO produce a large amount of concentrated liquid, which has high salt content and high pollutant concentration. At present, there is no good treatment method. Most of them are treated by recharging landfill, but it also brings salt Accumulate in the system, eventually disrupting the operation of the biological treatment system

However, other physical and chemical treatment processes have disadvantages such as many equipments, frequent failures, and inability to operate continuously.

The above reasons lead to the disadvantages of difficult leachate treatment standards and high treatment costs, resulting in the failure of many landfill leachate treatment facilities to operate, and there is a problem of leachate leakage

Anaerobic ammonium oxidation technology is currently the most efficient sewage denitrification technology. It has the advantages of greatly reducing aeration energy consumption, no need to add carbon sources, no sludge, and no greenhouse gases. However, anaerobic ammonium oxidation technology cannot solve the problem of refractory degradation. The problem of organic matter removal

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