An Enhanced Biological Phosphorus Removal Reactor Freed from the Restriction of Sludge Discharge

Abstract

The invention discloses an enhanced biological phosphorus removal reactor capable of getting rid of mud discharge limitation. The enhanced biological phosphorus removal reactor comprises: (1) oxygen-deficiency mud-water separation, sludge anaerobic phosphorus dilution and separation of phosphorus-enriched supernatant are carried out to realize the effects of getting rid of the mud discharge limitation and removing phosphorus; (2) phosphorus accumulating organisms PAOs are enriched in a reactor in a manner of being treated in a circulating environment of oxygen deficiency, anaerobic treatment and aerobic treatment of a mixed solution, and the anaerobic treatment and the aerobic treatment of a mud-water separation process; (3) a refluxed sludge part is fermented to supplement a carbon sourceneeded by nitrogen removal and phosphorus removal; and (4) output water of the reactor and the phosphorus-enriched supernatant are partially circulated into a water distribution box, and residual sludge and supplementary sludge fermentation liquid are used for supplementing energy consumption of reversing A2O and overflowing N2, so that continuous water feeding is realized. By adopting the enhanced biological phosphorus removal reactor, the problems in the prior art that a lot of activated sludge is discharged when the phosphorus is removed, and the anaerobic phosphorus dilution of the activated sludge causes secondary pollution to the phosphorus are solved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an enhanced biological phosphorus removal reactor freed from the limitation of sludge discharge. Background technique [0002] The discharge of phosphorus in urban sewage is a key factor that causes eutrophication in lakes, reservoirs and bays. my country's sewage discharge standards have made strict regulations on the concentration of phosphorus. "Pollutant Discharge Standards for Urban Sewage Treatment Plants" ( GB18918-2002) stipulates that since January 1, 2006, the effluent of newly built urban sewage treatment plants shall meet the first-class A discharge standard, that is, the total phosphorus shall not exceed 0.5mg / L. Therefore, the sewage must be discharged by appropriate treatment process for phosphorus removal. The currently widely used enhanced biological phosphorus removal (EBPR) process mainly relies on microbial growth or excessive phosphorus u...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of enhanced biological phosphorus removal reactor that gets rid of the limitation of sludge discharge, and solves the secondary problem of phosphorus removal accompanied by the discharge of a large amount of activated sludge and anaerobic phosphorus release of activated sludge in the prior art. pollution problem

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