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System for culturing oleaginous micro-algae by combining light guide pipe and raceway pond

A technology for oil-producing microalgae and runway ponds, which is applied in microorganism-based methods, bioreactors/fermenters for specific purposes, microorganisms, etc. and other problems, to achieve the effect of uniform light distribution, promotion of growth and reproduction, and high light utilization rate

Inactive Publication Date: 2019-09-20
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide a system for cultivating oleaginous microalgae in combination with light pipes and raceway pools, which is used to overcome the low light utilization rate and large-scale land occupation in the process of cultivating oleaginous microalgae in sewage. question
[0011] (1) The light source is introduced, and the natural light is introduced into the parts below the water surface that cannot be directly exposed through the light guide, so that the lower part receives light, and solves the problem that the natural light cannot penetrate underwater when the water level is too deep;

Method used

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  • System for culturing oleaginous micro-algae by combining light guide pipe and raceway pond

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Embodiment 1

[0045] The present invention finds that when Chlorella grows under natural conditions, the solar effective radiation at the light saturation point of photosynthesis is 500 μmol·m -2 ·s -1 , the corresponding light illuminance is 27777.8lx.

[0046] According to the light attenuation curve experiment, it is found that the incident light of 2 000lx can meet the growth requirements of Chlorella with a depth of 500mm.

[0047] Therefore, the light illuminance at the distance of 500mm from the bottom of the algae liquid should be above 2000lx, and the light illuminance on the liquid surface should be as close as possible to 2 7777.8lx.

Embodiment 2

[0049] In actual situations, light will be refracted when it enters the algae liquid from the air, causing the irradiation range of the light pipe to exit the algae liquid to change when it enters the algae liquid. Therefore, it is necessary to measure the refractive index of the algae liquid and calculate The irradiation range is corrected. The refractive index (n) of the chlorella algae liquid and domestic sewage were measured respectively, and the experimental data and results are shown in Table 2-1.

[0050] Table 1 domestic sewage and chlorella algae liquid refractive index measurement results (see Figure 11 shown)

[0051]

[0052] For the same incident angle of light, the larger the refractive index, the smaller the exit angle (the angle between the exit light and the normal), and the smaller the illuminated area of ​​the light guide in the water. In order to ensure the normal growth of Chlorella under harsh conditions, the minimum illuminated area should be consi...

Embodiment 3

[0054] In order to make the designed lighting scheme meet the lighting requirements in the whole culture period, the change of algae liquid turbidity in the culture cycle was studied, and the change of algae liquid turbidity in a culture cycle was sorted into a graph, as shown in figure 2 shown.

[0055] Depend on figure 2 It can be seen that at the initial stage of cultivation, the turbidity of the algae liquid of Chlorella is about 190NTU. Therefore, when designing the lighting scheme, the turbidity of the algae liquid is 190NTU as a reference value.

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Abstract

The invention provides a system for culturing oleaginous micro-algae by combining a light guide pipe and a raceway pond, and belongs to the technical field of sewage treatment. The system comprises a raceway pond body and a light guide pipe, the raceway pond body is provided with an online water quality monitoring analysis meter, a water pump, a water inlet and a water outlet, the light guide pipe is mounted on a pond top cover of a small raceway pond device of a steel frame, natural light is captured and redistributed by the light guide pipe, micro-algae at different depths in the pond is irradiated by the same light intensity, so that growth and reproduction of the micro-algae in the raceway pond are facilitated, and the system has an important practical values to research progress of mass and high-density culture mode of micro-algae and industrialization of micro-algae biodiesel.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a system for cultivating oil-producing microalgae in combination with a light pipe and a raceway pool. Background technique [0002] Energy is the foundation of the development of modern society and is related to national security and economic security. my country is rich in coal, poor in oil, and low in gas. Since the rapid economic development, China's energy demand has increased sharply. In 1993, 2006, and 2009, China became a net importer of oil, natural gas, and coal respectively. At present, although my country's economic growth rate is slowing down, it is still on the rise, and the dependence on fossil fuels is still higher than 50%. The energy problem has become a bottleneck restricting my country's economic development. [0003] The shortage of energy has prompted countries to look for new clean energy. Since 2005, global solar power and wind power have grown ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/34C12M1/00C12N1/12C12R1/89
CPCC12M21/02C12M23/02C12M41/12C12M41/26C12M41/34C12M41/00C12M31/02C12N1/12
Inventor 金文标涂仁杰韩松芳周旭胡雪筠杨秦辉
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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