A method for rapid treatment of landfill leachate in waste incineration plants

Abstract

The invention provides a method for quickly treating refuse leachate of a refuse incineration plant. The method particularly comprises the steps that a biological flocculant is generated through specific microorganism bacillus sp. TC16, SS, COD and BOD in the refuse leachate are polymerized with the biological flocculant through the adsorption bridging action, the charge neutralizing action and the sweeping action to be precipitated, solid-liquid separation is performed by adopting solid-liquid separation equipment, separated residues can serve as raw materials for producing organic fertilizer, and separated filtrate achieves up-to-standard release after treated through biological oxidation. A treatment technology is composed of a biological coagulation and slag removal system and a biological oxidation system. The method has the advantages of being stable in effluent quality, low in operation cost, short in treatment time, high in removal rate on ammonia nitrogen and organic matter and free of secondary pollution, treatment on the refuse leachate of the refuse incineration plant can be effectively achieved, and water obtained through treatment can be applied to landscape greening or car washing.

Description

1. Technical field [0001] The invention relates to garbage treatment technology, in particular to a biological method for rapidly treating garbage leachate in a garbage incineration plant. 2. Background technology [0002] The landfill leachate produced by the waste incineration plant mainly refers to the sewage leached out due to the decay, deterioration and fermentation of organic matter during the process of waste stacking in the pit. Different from the landfill leachate, the landfill leachate from the waste incineration plant is a fresh leachate with a relatively high BOD / COD ratio, which is easy for biochemical treatment. [0003] Water quality characteristics of landfill leachate in waste incineration plants: (1) High concentration of suspended solids (SS). The SS concentration of landfill leachate in incineration plants is often 5000-10000mg / L, and many even exceed 10000mg / L; (2) High COD and high BOD / COD ratio. Due to the high content of organic matter in the waste...

AI Technical Summary

Problems solved by technology

Although the whole system has the advantages of small footprint, strong adaptability, good effluent quality, no bacteria and suspended solids, high degree of automation, and system security, but the operating cost is high, the system needs to be flushed regularly, and the concentrated solution is produced in a large amount, so it is necessary to Process Concentrate

[0009] Chinese invention patent application 2011101087954 discloses a leachate treatment system of a waste incineration plant, which adopts a combined physicochemical-biochemical process, including a grid, a grit chamber, a regulating tank, a reaction sedimentation tank, an intermediate pool, and an upflow anaerobic sludge bed , secondary A / O tank, membrane bioreactor, Fenton-electrochemical reactor, aerated biological fluidization tank, sedimentation tank, sludge thickening tank, and comprehensively apply physical and biochemical methods to treat landfill leachate. The advantage lies in improving the quality of effluent water and reducing operating costs, but its disadvantages are that the use of chemical coagulation sedimentation method, the use of chemical flocculants, excessive dosage, will produce more chemical sedimentation sludge, and the treatment process is complicated and the treatment period is long

[0010] At present, the investment and operation cost of landfill leachate treatment in my country's waste incineration plants are relatively large. Longer, usually 10-15 days

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