Improved integrated sewage treatment device

Abstract

The invention discloses an improved integrated sewage treatment device. A settling tank is connected with a water outlet at the upper part of a swimming bed reactor; the bottom of the settling tank is connected with the interior of the swimming bed reactor through a circulating pump; the swimming bed reactor is connected with an aeration pump; biofringe filler is filled in the swimming bed reactor; an up-flow type reactor adopts a cylindrical double-layer structure; the top of a reaction layer is at closed state, and an air outlet is arranged at the top of the reaction layer; a water distributor is arranged at the bottom of the reaction layer; a circular baffle plate is arranged above the water distributor; the reaction layer is divided into an upper layer reaction chamber and a lower layer reaction chamber by the circular baffle plate; a three-phase separator is arranged between the water distributor and the circular baffle; biofringe filler is filled in the upper layer reaction chamber; polyethylene sponge filler is vertically distributed in the lower layer reaction chamber; and a water inlet is arranged at the bottom of the up-flow type reactor, which is connected with a water outlet at the upper part of the settling tank. According to the improved integrated sewage treatment device, the technologies of anaerobic ammonium oxidation and denitrification are conducted in a reactor, therefore, the space is saved, and the nitrogen removal efficiency is improved.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to an improved integrated (PN-Anammox-DN) sewage treatment device. Background technique [0002] The situation of environmental pollution and climate change is severe, and ammonia nitrogen pollution has gradually attracted great attention from all sides. The "Twelfth Five-Year Plan" of the Ministry of Environmental Protection clearly puts forward a plan to control ammonia nitrogen emissions, and its total emissions will be reduced by 10% compared with 2010. Nitrogen pollution in water is becoming more and more serious. At present, ammonia nitrogen in sewage is widely used in traditional nitrification-denitrification process. High energy consumption (nitrification aeration) and heterotrophic denitrification requires additional organic carbon source and dosing of alkali to neutralize the acid produced in the nitrification process, which greatly increases investment and operating costs. T...

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Problems solved by technology

In recent years, many scholars have done a lot of related research on the partial nitrosation-anammox combined process ([Zuo Jian'e, Meng Aihong, a new biological denitrification process-SHARON-ANAMMOX combined process[J], Water supply and drainage, 2001, 27(10): 22-27], [Wang Huizhen, Wu Junqi, Gao Zhiming, new process of semi-nitrification-ANAMMOX denitrification [J], Environmental Engineering, 2001, 19(5): 7- 9], [van Dongen, U., Jetten, M., Van Loosdrecht, M. (2001): The SHARON-ANAMMOX process for treatment of ammonium rich wastewater. Wat. Sci. Technol., 44, 153-160], [van Hulle, S.W.H., Van Den Broeck, S., Maertens, J., Villez, K., Donckels, B.M.R., Schelstraete, G., Volcke, E.I.P., Vanrolleghem, P.A. (2005): Construction, start-up and operation of a continuously aerated laboratory-scale SHARON reactor in view of coupling with an Anammox reactor, Wat.SA., 31, 327-334]), but the sewage treated by this process still contains some nitrate nitrogen and nitrite Salt nitrogen, causing the inorganic nitrogen removal rate of the process to stay at 75±10%, so in order to achieve a higher nitrogen removal rate, denitrification treatment of nitrate nitrogen and nitrite nitrogen in the effluent is necessary

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