Method for absorbing and fixing carbon dioxide by using spirulina

Abstract

The invention discloses a method for absorbing and fixing carbon dioxide by using spirulina, and belongs to the technical field of biology. According to the method, sealed photobioreactors are connected in series. Each photobioreactor is connected to a pH meter and a peristaltic pump, wherein a pH probe of the pH meter is soaked in a spirulina liquid contained in the photobioreactor and used for continuously detecting the pH value of the spirulina liquid, and the other end of the pH meter is connected to a switch of the peristaltic pump through a signal line. One end of the peristaltic pump isconnected to an alkaline solution storage container via a silica gel pipe, and the other end enters the spirulina liquid located inside the photobioreactor via a silica gel pipe. The peristaltic pumpcan convey an alkaline solution from the storage container to the photobioreactor, so that the pH value of the spirulina liquid is raised. When the pH value of the spirulina liquid reaches 11.0 or higher, the pH meter controls the switch of the peristaltic pump to be automatically off, so that the peristaltic pump stops conveying the alkaline solution from the storage container to the photobioreactor. According to the method, a large amount of carbon dioxide in the air can be absorbed and fixed. The method is also suitable for other spirulina varieties and basophilia microalgae varieties.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a method for cultivating basophilic cyanobacteria spirulina in series-type sealed photobioreactors to absorb and fix carbon dioxide. Background technique [0002] The growth of the world economy is closely related to the source and consumption of energy, especially low-cost fossil energy such as coal, oil, and natural gas. However, the use of these fossil fuels will inevitably lead to the emission of carbon dioxide, and thus cause global climate change. In order to be able to sustain the use of fossil fuels as an efficient energy supply, efficient, low-cost technologies must be developed to absorb and fix CO2 before it is released into the atmosphere. So far, various physical and chemical methods of absorbing and fixing carbon dioxide have been tested, but none of them can be widely used because the cost of these technologies is too high. In order to solve this problem, ...

AI Technical Summary

Problems solved by technology

However, the optimal culture conditions and the most suitable way to absorb and fix CO2 have not been established, and the quantitative analysis of CO2 uptake efficiency is limited to indirect calculation of carbon content in Spirulina biomass.

Images