Method for recovering carbon-based ammonium bicarbonate in refuse landfill

Abstract

The invention discloses a method for recovering carbon-based ammonium bicarbonate in a refuse landfill. The method uses cheap and easily-obtained biomass raw materials, and uses ammonia, steam and carbon dioxide produced in an operation process of the refuse landfill to synthesize the carbon-based ammonium bicarbonate which serves as nitrogenous fertilizers to achieve high-value utilization of waste. The method particularly comprises steps of adjusting the pH of landfill leachate, then conducting air stripping and collecting ammonia; collecting CO2 and the steam produced by methane burning in the refuse landfill; sending stoved biomass waste in a closed carbonization furnace, conducting oxygen deficit destructive distillation, and obtaining porous biomass charcoal; and using the porous biomass charcoal to serve as crystal nucleus and carriers in an ammonium bicarbonate reaction still, leading in the steam, the ammonia and the carbon dioxide and reacting to prepare the carbon-based ammonium bicarbonate. The method comprehensively uses sewage gas burned tail gas, nitrogen in the landfill leachate, the biomass raw materials and the like in the refuse landfill to produce slow release nitrogenous fertilizers. Inside cyclic utilization of resources is achieved inside a landfill, and purposes of fixing carbon and reducing discharge can be achieved simultaneously.

Description

technical field [0001] The invention relates to a method for recycling carbon-based ammonium bicarbonate in a garbage landfill. Background technique [0002] According to my country's national conditions and economic development, the sanitary landfill method will still be the main method of urban domestic waste treatment and disposal in my country due to its advantages of simple operation, large processing capacity, and low operating costs. However, the disposal of a large amount of landfill leachate containing high concentrations of ammonia nitrogen and the reduction of greenhouse gas emissions in landfills are two outstanding problems faced by the sanitary landfill of urban domestic waste in my country. [0003] The ammonia nitrogen content of landfill leachate is generally high, and the concentration is generally 800-3000 mg / L. It is a source of pollution, but it is also a potential nitrogen resource pool. Taking a certain landfill as an example, the amount of landfill ...

AI Technical Summary

Problems solved by technology

Although this method has the characteristics of simple process, flexible operation, small footprint, moderate operating cost and high treatment efficiency, due to the economical and efficient recovery of ammonia gas after stripping, there has been no breakthrough. Atmosphere, not only causing air pollution but also a waste of ammonia nitrogen resources

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