How Sodium Tungstate Improves The Nannochloropsis Oculata Diesel Production
Nannochloropsis oculata belongs to the category of the true focus algae class, is considered to be an ideal raw material for most potential, to achieve sustainable supply of biodiesel refining.
At present there are about 6 species have been set, namely Cadiz Nannochloropsis oculata, particles of Nannochloropsis oculata and lakes Nannochloropsis oculata, marine Nannochloropsis oculata, focus of Nannochloropsis oculata and saline Nannochloropsis oculata.
The research showed that the key of Nannochloropsis oculata oil is the fatty acid composition, which is closely associated with environmental conditions, nitrogen is a large number of elements needed for microalgae growth, and different nitrogen sources and concentrations have significant effects on the composition of microalgae fatty acids.
Nitrate nitrogen is the most important form of nitrogen in sea water. As the nitrogen fertilizer used in surface plants, nitrate reductase is an important regulating enzyme and a speed limiting enzyme in the process of nitrogen metabolism, it is an important factor affecting plant photosynthesis metabolism. Sodium tungstate Na2WO4 can reduce the activity of nitrate reductase, which is an inhibitor of nitrate reductase.
Why should sodium tungstate be used as an inhibitor of nitrate reductase? As a matter of fact, the main purpose of cultivating microalgae is to produce biodiesel, studies have shown that most of the algae in the nutritional stress conditions can accumulate higher levels of fat, oil is equally consumed in the process of growth, on the one hand, the amount of treatment is increased, on the other hand, the difficulty of making biodiesel is also increased, but correspondingly, the lack of nitrogen absorption can cause malnutrition and decrease the growth rate of algae. Therefore, it is necessary to find a balance between nitrogen metabolism, sodium tungstate is the key factor to achieve the balance of metabolism.
Industrial practice has shown that sodium tungstate is used as a regulator, sodium tungstate replaces the molybdenum reductase coenzyme factor in nitrate in the metabolic process (promoting the absorption of the active factor), thereby controlling or reducing the activity of nitrate reductase, and ultimately inhibiting the absorption of nitrate nitrogen by plants, after the control of nitrogen absorption, the growth rate of microalgae slowed down, but the accumulation of medium and short chain fatty acids began to accelerate.
Sodium tungstate is an environmental regulator, low toxicity, basically do not have to worry about environmental pollution, and less consumption can achieve the effect of nitrogen limit, greatly reduces the production cost of microalgae biodiesel. Nannochloropsis oculata production assistant agent has a great prospect of industry.
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