Single-stage whole process autotrophic denitrification sewage treatment device and technique thereof

Abstract

The invention discloses a single-stage whole process autotrophic denitrification sewage treatment device and a technique thereof. The device comprises a reactor, a water outlet pump, a stirrer, a separation membrane component and an aeration membrane component, wherein the separation membrane component is arranged at the central part inside the reactor; the aeration membrane component consists ofa membrane tube which is wound on the inner wall of the reactor; and an air inlet pipe is connected with the aeration membrane component, and a water inlet of a water outlet pump is connected with theseparation membrane component by a pipeline. The method mainly comprises: the dissolved oxygen is controlled to be about 0.5-1.0mg / L, and partial short-cut nitrification is carried out on ammonia nitrogen under the action of ammonia-oxidizing bacteria; and then, aeration is stopped, denitrification is completed by anaerobic ammonium oxidation, and clean outlet water can be obtained by membrane separation. The invention leads the aeration membrane and the separation membrane to be arranged inside the same reactor to form a membrane aeration separating reactor, thus coupling bubble-free aeration, membrane separation and biological degradation. By utilizing the characteristics of high efficiency and easy control of membrane aeration, the good short-cut nitrification of nitrogenous effluent can be realized.

Description

technical field [0001] The invention relates to a sewage treatment technology in environmental engineering, in particular to a single-stage whole process autotrophic denitrification sewage treatment equipment and its process. Background technique [0002] An important pollution source of water eutrophication is nitrogen-containing wastewater with ammonia nitrogen as the primary pollutant. Nitrogen-containing wastewater comes from a wide range of sources, and how to use high-efficiency and low-consumption processes to denitrify wastewater is an important direction of water pollution control technology research. Aiming at ammonia nitrogen pollution in water, currently commonly used ammonia nitrogen control technologies can be divided into physical and chemical treatment technologies and biological treatment technologies. Due to its high efficiency, low cost, and the ability to convert ammonia nitrogen into nitrogen (N 2 ) received more attention. [0003] The traditional de...

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Problems solved by technology

However, in the current implementation of this process, the enrichment period of bacteria is long, the operating control conditions are relatively strict, and the mass transfer rate of biofilm is slow, resulting in problems of low load, poor treatment effect, and poor stability, which limit the practical application of this technology. Engineering Applications

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