Landfill leachate concentrated solution adsorption, fermentation, dehydration and solidification process

Abstract

The invention provides a landfill leachate concentrated solution adsorption, fermentation, dehydration and solidification process. The process comprises the steps of coarse filtration, fine filtration, mixing, fermentation, granulation and carbonization. Biomass straws are added, a microbial decomposition agent is used for fermentation and natural dehydration, and microbial organic fertilizer, carbon-based compound fertilizer, biomass fuel and activated carbon special for sewage treatment meeting the national standards can be produced. The purposes of treating waste with waste and turning waste into wealth are achieved. The process is used for reduction, harmlessness and resourceful treatment on hazardous wastes. The process accords with national industrial policies of renewable resource utilization, circular economy and environmental protection, and has good economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a process for adsorption, fermentation, dehydration, and solidification of concentrated garbage percolation liquid. Background technique [0002] The landfill percolation concentrate is the concentrated product of the waste fermentation liquid in the waste pond after membrane filtration. The concentrated solution accounts for about 30% of the total stock solution. The current treatment method is to return the concentrated liquid to the landfill and mix it with the newly generated landfill leachate for repeated treatment. In fact, as time goes by, the concentration of landfill leachate will become higher and higher, membrane filtration will become more and more difficult, and the effluent will be discharged up to the standard. The rate will continue to decrease, and the processing cost will continue to increase. [0003] The current method of advanced treatment of conc...

AI Technical Summary

Problems solved by technology

The current treatment method is to return the concentrated liquid to the landfill and mix it with the newly generated landfill leachate for repeated treatment. In fact, as time goes by, the concentration of landfill leachate will become higher and higher, membrane filtration will become more and more difficult, and the effluent will be discharged up to the standard. The rate will continue to decrease, and the processing cost will continue to increase

[0003] The current method of advanced treatment of concentrated liquid in China is: use a denser and finer membrane, increase the pump pressure and then filter, but in the end there is still a few percent of the concentrated liquid that needs to be processed. The treatment method is drying or decompression heat pump evaporation. Although this method can finally deal with the concentration of landfill leachate, the government and enterprises cannot afford it due to the complexity of fixed asset investment equipment, repeated treatment, high energy consumption, and no added value.

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