RU151251U1 - PLANT FOR GROWING MICROALGAE - Google Patents

Abstract

1. Installation for growing microalgae, containing a container for a suspension, characterized in that it contains light blades in the form of consoles, fixed on the axis by means of a drive, an inlet for inlet of electrically activated water and nutrient mixture, a barbatator for inlet and uniform distribution of carbon dioxide air mixture , located on the lid of the container, openings on the lid of the container of the housing for feeding the inoculant of microalgae, the PH-controller and the PH-controller sensor, the valve for releasing excess oxygen and carbon dioxide, as well as the temperature sensor, the pump through which an additional light tray is connected to the container, and slurry drain valve installed at the bottom of the tank. 2. The installation according to claim 1, characterized in that the additional rectangular light tray with sides and a cover has a storage device, a divider, an illuminated field with a reflector and light sources fixed on its cover.

Description

The utility model relates to biotechnology and the microbiological industry, in particular to plants for growing microalgae, for example, chlorella.

A well-known installation for growing microalgae, containing a cultivator connected in series with light sources and a heat exchanger, an inducer of the suspension of microalgae cells and incubation containers (Autost. St. USSR No. 1083944, class A01G 31/02? 1982).

In this installation, the suspension of microalgae cells that have passed the light stage of the generation cycle of cell development alternately merges into the incubation tanks. In these containers, the dark stage of the generation cycle of cell development takes place (preparing cells for cell division, cell division). The presence of several incubation tanks significantly increases the cost of installation.

A known installation for growing microalgae, containing interconnected gas exchanger, a stimulator of the flow of a suspension of cells and a light receiver in the form of a coil.

In this installation, the entire mass of microalgae cells, including cells that are in the light stage of the generation cycle of development of cells, and cells that are in the dark stage of the generation cycle, are continuously exposed to light at a temperature optimal for the light stage (Aut. St. USSR No. 656592, CL A01G 33/02, 1976).

The disadvantage of this installation is the low productivity of growing microalgae and low photo-energy characteristics of the process, such as the efficiency of light energy use (photosynthesis efficiency), the deterioration of the conditions for passing the dark stage of the generation cycle of cell development.

The objective of the utility model is to increase the rate of microalgae cultivation.

The problem is solved by combining lighting and mixing the suspension in the capacity of the photobioreactor using rotating light blades of the cantilever type and an additional light tray.

The essence of the utility model is that in the installation used to grow microalgae use one capacity - photobioreactor. Dark phases (photoperiod “night”) are achieved by simple automatic turning off the light. And to increase the speed of growing microalgae, an additional light tray is used.

The utility model is illustrated by drawings, where in FIG. 1 shows a top view of the installation for growing microalgae and the positions indicated:

- 1 capacity of photobioreactoa,

- 2 rotating light blades of the cantilever type, which are both mixers,

- 3 - inlet pipe electro-activated water and nutrient medium,

- 4 - pump,

- 5 - an additional light tray,

In FIG. 2 shows a side view of the capacity of the photobioreactor and the positions indicated:

- 6 - photobioreactor cover

- 7 - barbator of carbon dioxide air mixture,

- 8 - cylinder with CO2,

- 9 - pH controller,

- 10 - pH sensor of the controller,

- 11 - air compressor,

- 12 - hole for input of the inoculant,

- 13 - hole for the temperature sensor,

- 14 - valve for the release of excess oxygen and carbon dioxide,

- 15 - drive rotating light blades cantilever type,

- 16 - axis of the rotating light blades of the console type,

- 17 - crane for draining the suspension.

In FIG. 3 shows an additional light tray and the positions indicated:

- 18 - the housing of the additional light tray,

- 19 - a cover of an additional light tray,

- 20 - drive,

- 21 - divider,

- 22 - regulator divider,

- 23 - illuminated field with a reflector.

In FIG. 4 shows the cover of the additional light tray and the positions indicated:

- 24 - microalgae illuminators.

The plant for growing microalgae consists of the capacity of the photobioreactor 1 (Fig. 1) of transparent monolithic polycarbonate with rounded corners placed inside it with light blades of the cantilever type 2 (Fig. 1), an inlet pipe for supplying electroactivated water and nutrient medium 3 (Fig. 1) ), pump 4 (Fig. 1), and an additional light tray 5 (Fig. 1).

On the lid of the tank of the photobioreactor 6 (Fig. 12) there is a barbator 7 (Fig. 2) for introducing a carbon dioxide air mixture, moreover, CO2 is supplied from a cylinder 8 with CO2 (Fig. 2) through a PH controller 9 (Fig. 2) with a sensor 10 (Fig. 2).

To improve the operation of the barbator, an air compressor 11 is attached to it (Fig. 2).

In addition, on the lid 6 of the photobioreactor tank (Fig. 2) there is an opening for introducing the inoculant 12 (Fig. 2), an opening for the temperature sensor 13 (Fig. 2)), valve 14 (Fig. 2) for the output of excess O2 and CO2.

Inside the capacity of the photobioreactor 1 (Fig. 2), the light blades of the cantilever type 2 (Fig. 2), which are both agitators, are fixed through the actuator 15 (Fig. 2) on the axis 16 (Fig. 2).

In the lower part of the capacity of the photobioreactor 1 (Fig. 2), a suspension drain valve 17 (Fig. 2) is installed

To the capacity of the photobioreactor 1 (Fig. 1) through the pump 4 (Fig. 1) is attached an additional light tray 5 (Fig. 1) of a rectangular shape consisting of a housing 18 (Fig. 3) with a lid 19 (Fig. 3) and contains a drive 20 (Fig. 3), the divider 21 (Fig. 3) with the regulator divider 22 (Fig. 3) and the illuminated field with a reflector 23 (Fig. 3).

In the lid 19 (Fig. 4) of the additional light tray (Fig. 4), illuminators of microalgae 24 are fixed (Fig. 4).

The operation of the plant for growing microalgae, such as chlorella, is as follows.

In the tank photobioreactor 1 (Fig. 1) through the inlet pipe 3 (Fig. 1) serves electro-activated water and a nutrient medium. A microalgae inoculant is introduced through the hole in the housing 12 (Fig. 2) of the photobioreactor tank, where, using the light blades of the cantilever type 2 (Fig. 2, which rotate at a frequency of 6-8 revolutions per minute, mixing and illumination of the suspension occur simultaneously at the same time microalgae in the capacity of the photobioreactor 1 of Fig. 1) through the pH controller 9 (Fig. 2) serves carbon dioxide air mixture, which is evenly distributed in the tank from the barbator 7 (Fig. 2). Through an opening in the body of the photobioreactor tank using a sensor 10 (Fig. 2) measure the pH, the value of which is regulated by the supply of CO2. Through valve 14 (FIG. 2), excess oxygen and carbon dioxide are removed. Through the pump 4 (Fig. 1), part of the suspension is fed into an additional light tray 5 (Fig. 1) with a rectangular housing 18 (Fig. 3) with sides (not shown in Fig.). In the accumulator 20 (Fig. 3), the incoming suspension is evenly distributed over the entire area of the accumulator, then through the divider 21 (Fig. 3), which serves to control the layer size from 10 ml to 0.2 ml using the divider 22 regulator (Fig. 3) ), the suspension enters the illuminated field with a reflector (it can be a mirror surface) 23 (Fig. 3) where it is illuminated by a powerful stream of light, which is formed by microalgae illuminators (light sources) 24 (Fig. 4), mounted in the cover of an additional light tray and as close to Loew suspension (1-1.5 cm). This distance provides a fairly powerful density of light per unit surface, which cannot be achieved in other structures due to the passage of light through glass. Light sources can have different wavelengths (red and blue). The suspension passes the illuminated field with a reflector in a short time of 5-6 seconds and merges into the capacity of the photobioreactor 1 (Fig. 1).

A natural phenomenon - biological clocks or photoperiods “day” and “night” are used in the installation to increase the rate of microalgae cultivation. The night photoperiod is used in the utility model not only to go through the dark stage of the microalgae cell development cycle — preparation for cell division and cell division itself (use the photoperiod (night No. 1) for this, but also to increase the rate of microalgae growth during a significant increase the number of cells in suspension and the impossibility of further successful reproduction in the light, i.e., the transition at the end of the process to a heterotrophic method of reproduction of microalgae and maintaining the pace of reproduction production in the dark stage. To do this, use the photoperiod (night No. 2). Gas exchange is supported depending on the photoperiods. In the photoperiod “day” carbon dioxide CO2 is supplied to the tank — photobioreactor, the flow of which is regulated by the pH controller. Since, for example, chlorella, its reproduction tends to pH above the value of 8, the CO2 supply regulates the pH value, which is set with a value of 7.0-7.5 and provides a suspension of microalgae with carbon nutrition in the photoperiod “day”. Evolved oxygen is discharged through an exhaust valve. In the “night” photoperiod, purified air enriched with oxygen O2 is fed into the photobioreactor. The carbon dioxide released is discharged through an exhaust valve.

The design of the utility model is simplified, due to which it is cheaper, and the microalgae growing cycle is reduced by 20-24 hours.

An advantage of the proposed installation over other plants for growing microalgae is lighting, mixing the process of growing microalgae in one tank and the use of additional lighting using a light tray. This allows you to significantly increase the productivity of the utility model, improve photo-energy characteristics, the efficiency of the use of light energy (photosynthesis efficiency) in the method of growing microalgae.

Claims (2)

1. Installation for growing microalgae, containing a container for a suspension, characterized in that it contains light blades in the form of consoles, mounted on an axis using a drive, an inlet pipe for introducing electro-activated water and a nutrient mixture, a barbator for introducing and even distribution of carbon dioxide air mixture located on the lid of the container, openings on the cover of the container body for supplying the microalgae inoculant, the pH controller and the pH controller sensor, the valve for the release of excess oxygen and carbon dioxide behind, as well as a temperature sensor, a pump through which an additional light tray is connected to the tank, and a suspension drain valve installed in the lower part of the tank. 2. Installation according to claim 1, characterized in that the additional light tray of a rectangular shape with sides and a lid has a drive, a divider, an illuminated field with a reflector and light sources mounted on its lid.

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