Method for preparing microalgae fuel by solar-driven biochemical thermochemical conversion and system thereof

Abstract

The invention discloses a method for preparing microalgae fuel by solar-driven biochemical thermochemical conversion and a system thereof. The method for preparing the microalgae fuel by solar-drivenbiochemical thermochemical conversion comprises the following steps: 1. carrying out microalgae culture and regular harvesting in a microalgae high-density culture and harvesting system; 2, introducing the harvested algae slurry into a solar hydrothermal pretreatment system, carrying out hydrothermal hydrolysis, and separating the obtained product in a solid-liquid separator to obtain a hydrothermal hydrolysate and algae residues; 3, introducing the hydrothermal hydrolysate into a biomass fermentation gas production system to produce a material gas, carrying out oil extraction on the algae residue, introducing the obtained oil into a biomass bio-oil refining system to produce biodiesel, and introducing the degreased algae residue into the biomass fermentation gas production system to produce the material gas; and 4, performing biogas purification by using sodium carbonate, and recovering CO2 for microalgae culture; wherein the system is powered by solar photovoltaic power. The method can be widely applied to the fields of energy and the like.

Description

technical field [0001] The invention relates to the field of renewable energy utilization, in particular to a method and system for preparing microalgae fuel through solar-driven biochemical thermochemical conversion. Background technique [0002] With the advancement of science and technology and the vigorous development of society in our country, people's demand for fossil fuels is increasing day by day. However, due to frequent political turmoil in international oil exporting countries, the stability of fossil fuel supply is increasingly affected. In addition, the burning of a large amount of fossil fuels has further exacerbated the greenhouse effect and environmental pollution. Therefore, research on the production of green biofuels from renewable biomass as raw materials to replace fossil fuels has become the focus of attention. [0003] Among the extensive biomass fuel raw materials, the productivity of algae accounts for about 45% of the total plant productivity in t...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention proposes a method and system for producing microalgae fuel through solar-driven biochemical thermochemical conversion, which solves the problem of low production of microalgae biomass in the traditional process of using microalgae biomass to produce biofuel. Complicated operation, high energy consumption, high cost, poor cycle performance and other problems

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