II.Mathematical Models
1. Microalgae Growth Model
Based on the experimental data, we analysed the specific growth rate of phaeodactylum
tricornutum under different culture conditions, explored the relationship between the growth
quantity and growth trend of microalgae, established a logistic model to study the growth
curve of microalgae, and analysed the best culture environment for phaeodactylum
tricornutum.
2. Plant Cost Model
Faced with the reality of increasing demand for food and energy and declining fossil fuel
reserves, the use of unexploited organisms to support sustainable development is a very hot
research direction at present. Our main research objective is to find the minimum value of
cost and the maximum value of production by mining the main factors affecting the cost of
microalgae production, building a target planning model based on the cultivation cost and
time cost of the plant, and finding the The equilibrium is reached to arrive at the optimal
algae cultivation time and the corresponding production and cost.
3. Microalgae Plant Site Selection Model
In order to effectively reduce the total cost of microalgae plant production and provide
some support for the economic viability of microalgae production of biodiesel, we explored
the best sites for urban cultivation of microalgae through the DEA model, fully considering
environmental factors affecting the growth of microalgae such as rainfall, wastewater and
sunlight, and studying economic factors such as transport costs and land costs, and
conducting an in-depth study of the most suitable areas for cultivation of microalgae in 31
provinces in China. The areas that are most suitable for cultivating microalgae.
Fig.2 Mivralgae Plant Site Map
III. Questionnaire Analysis
With the development of molecular biology and the improvement of genetic engineering, the
use of synthetic biology to improve the expression of oil-producing genes in microalgae can
provide a novel direction for the industrialisation of bio-oil production, but genetically
modified microalgae and their new energy products, as new products, will inevitably be
questioned by the public, and the unknown degree of public acceptance of microalgae may
become a major obstacle to the development of microalgae. Therefore, a questionnaire was
sent to the public for research and analysis to study the public's awareness and acceptance
of microalgae products, and then to analyse the needs of users, and a questionnaire research
report was generated to provide some reference and suggestions for the future direction of
microalgae product launch and promotional tools.
1. Questionnaire Data Analysis
We are from China, the United States, Italy, Denmark, 620 questionnaires data, details of
the user from the questionnaire star platform export to excel file, visualization analysis,
through the reliability test, validity test, analysis of project analysis, chi-square,
independent inspection statistical methods, such as the rationality of the questionnaire
survey result believable.
2. Establishing a Demand Model
In order to explore the public's perception of GM microalgae and their needs, we established
a CRITIC weighted user needs model based on the user questionnaire data combined with
Maslow's needs theory, and studied the correlation between the user's acceptance of GM
microalgae and its products and the various levels of needs from the user's awareness
component, emotional component and behavioural component.
3. Potential User Mining
According to the user demand model, we analyse the acceptance of users, use K-means
clustering analysis to explore potential users, explore the value of the five potential
users and their individual characteristics, and give certain suggestions: the enterprise
should focus on developing the elderly group with high education or rich experience, and
include the college students with higher education in the next development of customers, so
as to prepare for the next promotion of transgenic microalgae products. The company should
focus on the elderly with high levels of education or experience, and include university
students with higher education in its next customer development, in order to prepare for the
further promotion of GM microalgae.
Fig.3 2021 CHINA-FAFU Questionnaire
Ⅳ. Future Prospects
The production of biodiesel from microalgae has attracted much interest in recent years. The
advantages of urban cultivation of microalgae are urban wastewater use, oxygen production
and employment sustainability, and the commercialisation of biodiesel production from
microalgae has been supported by scientific evaluation and practical experience. The
selection of a microalgae cultivation site that is suitable for both the environment and the
economy can effectively reduce the feedstock costs for diesel production. As a next step, we
will continue to conduct in-depth research into provinces suitable for microalgae
cultivation, examining their geographical environment, economic conditions, human
development and other factors to study the location of microalgae plants in more depth.
