Biofilm active sand reactor and wastewater treatment method thereof

Abstract

The invention discloses a biofilm active sand reactor and a wastewater treatment method thereof. The biofilm active sand reactor comprises a main body, a water inlet pipe, an effluent weir, a filter material, a water distributor, a sand guide cone, an air lifting pump, a sand lifting air nozzle, a sand lifting pipe, a sand washer, a sand washing water outlet and an electric control system. The wastewater enters through the water inlet pipe and is uniformly distributed by the water distributor; the wastewater goes adversely from bottom to top and goes through the filter material; impurities in the wastewater are filtered, and the turbidity and chroma in the wastewater are effectively removed. By adopting the reactor and method disclosed by the invention to treat wastewater, the reactor covers a small area, the backwashing efficiency of a filter material is high, and the filter material is not hardened; by wrapping the filter material with a biofilm, an effect of removing organic pollutants in the wastewater is realized; moreover, the chroma and turbidity removal effect of the whole system is more remarkable due to microorganisms. After the treatment, the COD (chemical oxygen demand), turbidity and chroma in the water reach or exceed the first-class A standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002).

Description

technical field [0001] The invention belongs to the field of advanced sewage treatment and micro-polluted water purification, and in particular relates to a sewage reactor and a method for treating sewage. Background technique [0002] At present, most of the urban sewage treatment plants in my country adopt the first-level B standard discharge standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002). As long as the discharge meets the standard, it will have little impact on the environment. However, with the rapid development of my country's social economy, the urban population has increased sharply, and the daily water consumption in cities and towns has increased sharply. In recent years, the total amount of wastewater discharge has shown an obvious upward trend, which has caused relatively large pressure on the environment in some areas. Under such circumstances, if the sewage treatment plant is still operated according to the firs...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a biofilm activated sand reactor and a method for treating sewage thereof, so as to solve the problems in the prior art that the floor area is large, the backwashing efficiency of the filter material is not high, the filter material will be hardened and the organic Problems with limited capacity to deal with pollutants

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