Membrane biofilm culturing and domesticating process and membrane biofilm reaction device for treating high-salinity wastewater

Abstract

The invention discloses a membrane biofilm culturing and domesticating process and a membrane biofilm reaction device for treating high-salinity wastewater. The membrane biofilm culturing and domesticating process provided by the invention comprises a secondary circulating biofilm culturing stage and a salt tolerance domesticating stage. The membrane biofilm reaction device comprises: a reaction vessel; a gas separation membrane, which is arranged in the reaction vessel and is provided with an inner cavity; a biofilm, which is positioned on the outer side of the gas separation membrane; a water inlet pipeline and a water outlet pipeline, which are communicated with the interior of the reaction vessel; and a gas inlet assembly and a gas outlet assembly, which are communicated with an innercavity of the gas separation membrane, wherein wastewater entering the reaction vessel sequentially passes through the gas outlet end and the gas inlet end of the gas separation membrane. The membranebiofilm reaction device has the advantages of low capital construction cost, small occupied area, low energy consumption, simple operation, high oxygen utilization rate and the like, also has the advantage of capacity of improving the attachment stability of microorganisms, enhancing the pollutant removal capability of the microorganisms and the like, and realizes an efficient sludge reduction effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, more specifically, to a membrane biofilm cultivation and domestication process and a membrane biofilm reaction device for treating high-salt wastewater. Background technique [0002] With the continuous increase of my country's population and the rapid development of the economic system, the discharge of wastewater from various industries in society is increasing. The latest data from the National Bureau of Statistics shows that in 2017, the total amount of wastewater discharge in my country was about 69.966 billion tons, of which the discharge of total nitrogen and total phosphorus reached 2.1646 million tons and 118,400 tons respectively. The water body will accelerate the deterioration of the environment of the receiving water body and increase the chance of eutrophication of the water body. The "China Water Resources Bulletin (2018)" pointed out: Among the 124 important lakes monitor...

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Problems solved by technology

However, in addition to the disadvantages of high energy consumption, large floor area, and low effluent quality, high concentrations of inorganic salt ions will also reduce the settleability of activated sludge and deteriorate the biological system.

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