| Microalgae have high photo synthetic efficiency, and can be used to remove nutrients contained in biogas slurry, such as nitrogen and phosphorus. At the same time through photosynthesis, microalgae turn the luminous energy into its own biomass chemical energy. Then we can get biodiesel from the generation biomass. Microalgae cultivating site is airtight model photobioreactor generally. This paper has described the microalgae biodiesel production process simply, as well as researched the N and P remove ability of microalgae from biogas slurry. Finally, this paper has discussed the design mentality of photobioreactor, and measured the cultivating effect of the product. Microalgae biodiesel productions need to pass through more than one step. Researchers work hardly to improve each procedure, and try to make microalgae biodiesel has competitive advantage.This paper has already studied, during the cultivating process of microalgae, how sterilization, salinity, pH value and dilution ratio influence the grow condition and removal-rate of N, P. Through this experiment, we have discovered that when culturing with biogas slurry directly and adding 4times of distilled water, the grow condition is superior. At this time, the removal-rate of TN and TP are71.96%and72.40%respectively. The highest removal-rate of TP is80.63%when cultivating with100%percent biogas slurry, the highest removal rate of TN is82.74%when cultivating with40%percent of the biogas slurry.As a new kind of nanometer materials, graphene has oversized theory specific surface area, unique monolithic layer structure, and excellent chemical and electrochemical activities, which make the graphene used extensively. This paper has combined microalgae cultivation and the application of graphene together, investigated how the graphene influence the growth condition in cultivation of microalgae, and hope for provide a new way of thinking percent to solve eutrophication and environmental problems such as the red tide. |
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