Biofilm culturing method for carrier packing in moving bed biofilm reactor

Abstract

The invention discloses a biofilm culturing method for carrier packing in a moving bed biofilm reactor. The biofilm culturing method comprises the following steps: (1) adding activated sludge and ion exchange wastewater into the moving bed biofilm reactor containing the carrier packing, and then performing continuous aeration treatment for 1 to 2 days; (2) simultaneously performing water drainage and ion exchange wastewater supplement on the moving bed biofilm reactor, performing dynamic culture, and enabling the activated sludge to flow back; keeping pH (potential of hydrogen) in a reaction tank to be 7.0 to 7.5, and keeping an aeration state while the dynamic culture is performed until biofilm culturing is finished. The biofilm culturing method disclosed by the invention is fast in biofilm culturing, simple, and easy to operate; moreover, the biofilm culturing method has a good treatment effect, is capable of shortening domestication time, has wide practicability, and is a suspended packing biofilm culturing method suitable for high-concentration ion exchange wastewater.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a film-hanging method based on suspended fillers in a moving-bed biofilm reactor treatment system in high-concentration separation wastewater. Background technique [0002] With the continuous development of sewage biological treatment technology, biofilm method has been widely used, among which "moving bed biofilm reactor (MBBR)" is the most widely used and most efficient treatment technology in biofilm technology. There are hundreds of successful application examples in the municipal and industrial fields. [0003] MBBR is developed from biological fluidized bed and submerged biological filter, and combines the common advantages of traditional live sludge method and biofilm method. Its principle is to add a certain proportion of carrier fillers close to the density of water in the aeration tank, and make the carrier fillers circulate in the aeration tank under water f...

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Problems solved by technology

[0005] At present, the methods of biofilm formation mainly include "suffocating exposure method", "circulation method", "natural film formation method", "rapid film formation method", etc. The biofilm cultivated by the first two methods is not strong and easy to fall off. The time in the middle is longer, and it usually takes 1 to 2 months. Moreover, these four methods need to add additional low-concentration nutrients to maintain the growth of bacteria and the pH in the reaction tank when the film is formed. After the film is successfully formed, it still takes a long time. Time to acclimatize biofilms