Method for carrying out deep carbon removal, denitrification and desulfurization on early-stage landfill leachate by using UASB-SBR-EO treatment

Abstract

The invention discloses a process method for carrying out deep carbon removal, denitrification and desulfurization on early-stage landfill leachate by using UASB-SBR-EO treatment, and belongs to the technical field of carbon removal, denitrification and desulfurization. The process method is widely applied to deep treatment of high-concentration organic sewage, particularly has remarkable deep carbon removal, denitrification and desulfurization effect on early-stage landfill leachate, and comprises: carrying out front-end pretreatment by utilizing a UASB process to efficiently remove degradable COD so as to provide a good physicochemical environment for a subsequent anaerobic ammonia oxidation reactor. According to the invention, SBR is selected as an anaerobic ammonia oxidation reactor, the pH value and DO are reasonably controlled, and deep treatment of early-stage landfill leachate, ie., synchronous removal of organic matters, ammonia nitrogen and sulfate, is realized under withoutfeeding of external carbon sources; and strict control is carried out through an electrooxidation process to deeply remove refractory organic matters, so that the concentrations of organic matters, ammonia nitrogen and sulfate in the final effluent respectively are 87.511 mg / L, 18.545 mg / L and 3065 mg / L so as to respectively achieve the organic matter removal rate of 99.4%, the ammonia nitrogen removal rate of 97.6% and the sulfate removal rate of 79.9% and completely meet the sewage discharge requirements.

Description

technical field [0001] The invention relates to a waste water combined treatment method and device, mainly for deep carbon removal, nitrogen removal and desulfurization for early landfill leachate with high ammonia nitrogen and high organic matter. The process is equipped with an inlet water tank, an upflow anaerobic sludge bed reactor (UASB), an intermediate water tank, a sequencing batch reactor (SBR), an intermediate water tank and an electro-oxidation (EO) device. When the wastewater flows through the UASB, anaerobic biological reaction occurs, which can remove most of the organic matter, and convert the organic nitrogen into ammonia nitrogen during anaerobic decomposition; the intermediate water tank is used to adjust the pH, temperature and other influencing factors; in the SBR, the sub Nitrate-type anaerobic ammonium oxidation and sulfate-type anaerobic ammonium oxidation reactions realize biological simultaneous denitrification and sulfur removal; the effluent passes t...

AI Technical Summary

Problems solved by technology

This process does not need to add any carbon source for deep denitrification, which is different from other conventional landfill leachate treatment processes, and solves the key problem of high treatment costs caused by the need to add a large amount of carbon source in the denitrification and denitrification process

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