Energy-saving method for processing leachate of middle-aged or old refuse landfill
A technology for a landfill and a treatment method, applied in the field of landfill leachate wastewater treatment, can solve the problems of refractory ammonia nitrogen degradation and difficult removal of COD, and achieve high treatment efficiency, reduced operating costs, denitrification rate and COD removal rate. improved effect
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[0007] A new process for energy-saving middle-aged and elderly landfill leachate treatment, which includes primary biochemical treatment, primary physical and chemical treatment, secondary biochemical treatment, and secondary physical and chemical treatment.
[0008] In the primary biochemical treatment stage, the anaerobic hydrolytic acidification tank controls the wastewater in the hydrolytic acidification stage and completely converts Kjeldahl nitrogen into ammonia nitrogen. The temperature in the anaerobic hydrolytic acidification biological reaction tank is controlled at 20-30 °C, and the pH value is 7.5-9. The DO is controlled at figure 1 Filler film as shown or as figure 2 The suspended sludge shown operates in two ways.
[0009] The pH value of the wastewater needs to be adjusted to 1-2.5 before the first-level physicochemical process, the mass ratio of iron to carbon in the reactor is 1:1, the hydraulic retention time of the wastewater in the reactor is 0.5-1 hour, a...
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