Airlift type photobioreactor

Abstract

The present invention relates to an airlift type photobioreactor which solves problems of complicated structure, poor gas-liquid mixing efficiency and low microcystis fixing CO2 speed rate in the existing reactor. The reactor includes a glass tank equipped with a culture medium intake, a nutrient fluid intake, a cooling water outlet, an air intake and an air outlet, the glass tank inner side is annual equipped with multi-group recuperator tubes communicated with the cooling water intake and the cooling water outlet, an ascending conduit tube divides the glass tank into an ascending area and a descending area, the glass tank top is equipped with an air separating area, the air inlet communicates with an air distributor located on the ascending area bottom through the air inlet tube, the descending area is equipped with a nutrient fluid outer circulation pipeline, the nutrient fluid outer circulation pipeline communicates with the air inlet pipeline through a water pump. The photobioreactor has simple structure and convenient operation which is particular suitable for photosynthesis fixing CO2 with high efficiency by using microcystis in CO2 emission reduction system. The emission reduction speed rate can reach above 50%, and has low operation cost and is friendly to environment.

Description

technical field [0001] The invention relates to an air-lift photobioreactor for photosynthesis of algae. Background technique [0002] At present, there are various structures of bioreactors used for microalgae treatment. Considering that microalgae are sensitive to high shear, air-lift photobioreactors are usually selected, but although air-lift photobioreactors use gas-liquid circulation mixing method, but there are still problems of low gas-liquid mixing efficiency and low mass transfer intensity. In order to strengthen gas-liquid mixing and mass transfer, technicians have made various improvements, such as in patent No. 200420009076.2, named "air-lift In the utility model patent of "Photobioreactor", in order to solve the above problems, the number and shape of the nozzles of the gas distributor were improved, in order to be more conducive to the dispersion of the gas in the culture medium and eliminate the dead angle. However, in practical applications, no matter how t...

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Problems solved by technology

However, when it is necessary to deal with industrial exhaust gas with high carbon dioxide concentration (concentration can be as high as about 25% by volume) for carbon dioxide emission reduction, in addition to optimizing the process, efficient gas-liquid mixing and mass transfer are essential for microalgae to fix CO 2 The speed of the same has a significant impact, and the above-mentioned conventional improvements are difficult to meet the requirements

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