A combination treatment process of sbbr-sbr deep denitrification of landfill leachate

Abstract

The invention relates to the technical field of sewage treatment, in particular to a SBBR-SBR deep denitrification combined treatment process for landfill leachate. Sewage enters the SBBR for stirring, fillers and activated sludge begin to absorb carbon sources to form internal carbon sources, and then the activated sludge in the SBBR is pumped into the SBR2 reactor for aeration and nitrification, and the sludge after the nitrification of SBR1 is pumped into SBBR also undergoes endogenous denitrification. In the previous stage, the biofilm in the filler adsorbed a large amount of internal carbon source and will be used for denitrification at this time. After denitrification, sedimentation and drainage will enter the next cycle. The functions of SBR1 and SBR2 Interchange; through this treatment process, the deep denitrification of landfill leachate can be realized without adding any carbon source; the biological filler in SBBR absorbs a large amount of internal carbon source, and the internal denitrification rate is very fast; the nitrification process and the denitrification process Separation, the internal carbon source does not go through the consumption of the aerobic stage, and the rate is much faster than the traditional internal source denitrification; the final SBBR effluent total nitrogen is lower than 50mg / L, which directly meets the national discharge standard.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an SBBR-SBR deep denitrification combined treatment process for landfill leachate. Background technique [0002] Refractory nitrogen-containing organic wastewater including coking, chemical, petrochemical, printing and dyeing, papermaking, pharmaceuticals, pesticides, landfill leachate, etc. After secondary biochemical treatment, ammonia nitrogen and most of the organic matter can be effectively removed, but the wastewater still contains certain Concentrations of refractory organic matter, nitrate nitrogen, organic nitrogen and ammonia nitrogen, the biodegradability of the secondary biochemical effluent is extremely poor, and advanced treatment is required to meet the discharge and reuse requirements. Traditional landfill leachate denitrification technologies mainly include A / O process, oxidation ditch and SBR. Although the A / O process has a separate anoxic zone for den...

AI Technical Summary

Problems solved by technology

Although the A / O process has a separate anoxic zone for denitrification, the denitrification rate is relatively fast, but because it belongs to pre-denitrification, it is difficult to achieve a denitrification rate of more than 90%; the oxidation ditch process has no obvious nitrification zone and Denitrification area, so the nitrogen removal efficiency is not very high

The traditional SBR process generally adopts post-denitrification method to achieve deep denitrification of leachate, but it needs to add carbon source and the treatment cost is high

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