Breathing bottle, measuring device and measuring method for measuring biofilm respiration rate

Abstract

The invention discloses a breathing bottle for measuring the respiration rate of biofilm, which comprises a bottle body, a carbon dioxide absorption tube and a perforated partition arranged inside the bottle body; Stirring area and biofilm reaction area for placing MBBR filler; carbon dioxide absorption pipe is provided with air holes and contains 2 solution; the perforated partition has a first hole corresponding to the middle and lower parts of the perforated partition and used as a liquid exchange channel and a second hole corresponding to the upper part of the perforated partition and used as a gas exchange channel, and the oxygen mass transfer stirring zone passes through the liquid exchange channel The gas exchange channel communicates with the biofilm reaction zone. On the one hand, it ensures that the gas-liquid exchange in the oxygen mass transfer stirring zone and the biofilm reaction zone is fully carried out; Respiratory dynamics characteristics. The determination process is simpler and faster, and the determination result is more accurate and effective.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a breathing bottle, a measuring device and a measuring method for measuring the respiration rate of a biofilm. Background technique [0002] Fluidized bed biofilm reactor (MBBR) is a new type of biofilm reactor, which is an improved new composite biofilm developed on the basis of fixed bed reactor, fluidized bed reactor and biofilter. reactor. The process requires the use of suspended fillers to provide a suitable growth environment for microorganisms. Determining the respiratory dynamics characteristics of biofilm on MBBR suspended packing is extremely important for optimizing the design and operation of sewage treatment process. [0003] There are two existing methods for measuring the respiration dynamics of biofilms on MBBR fillers. One is to directly put the filler into the breathing bottle, and match it with magnetic stirring, so as to conduct a breath dynamics test; duri...

AI Technical Summary

Problems solved by technology

One is to directly put the filler into the breathing bottle, and match it with magnetic stirring, so as to conduct a breath dynamics test; during the test, the filler will interfere with the rotation of the magnetic stirrer and affect the oxygen mass transfer; in addition, the magnetic stirrer will put the filler on the The biofilm is scraped off, thereby destroying the biofilm structure and affecting the measurement results; in fact, the measurement cannot be realized

The other is to directly centrifuge the MBBR filler to make the biofilm on the filler fall off, suspend it in water, and then carry out the respiratory dynamics experiment according to the conventional method; this method has caused irreversible damage to the biofilm on the filler; At the same time, the shedding of the biofilm leads to changes in the mass transfer rate of oxygen on the surface of the filler biofilm, which cannot truly reflect the respiratory dynamics of the biofilm.

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