Integrated production method of organic sewage/waste residue treatment, microalgae culturing and oil refining

Abstract

The invention relates to the environmental protection field, the microalgae cultivation engineering field and the biodiesel refining field, specifically an integrated production method of organic sewage / waste residue treatment, microalgae culturing and oil refining. The method comprises: treating the organic sewage and organic waste residue respectively by anaerobic biochemical technology to generate biogas for generating electricity and supplying heat; performing aerobic biochemical treatment to the sewage and biogas slurry; blending into nutrient solution, and adding into large-scale photobioreactor; passing into biogas, burning to generate carbon dioxide waste gas for culturing oil-containing microalgae; collecting the obtained microalgae by air floatation method and breaking the walls; separating the oil-containing microalgae into microalgae oil, microalgae protein, microalgae polysaccharide and microalgae residue; and refining biodiesel accorded with the national standard using the microalgae oil as raw oil. The invention integrates the organic sewage and waste residue treatment, microalgae culturing and processing, and biodiesel refining; reduces production cost; realizes biodiesel clean production; and treats the 'three wastes'.

Description

[Technical Field] [0001] The invention relates to the field of environmental protection, the field of microalgae cultivation engineering, and the field of biodiesel refining, in particular to a production method of organic sewage waste residue treatment coupled with algae cultivation and oil refining. [Background technique] [0002] The current global energy crisis is increasingly intensifying, the flooding of eutrophic water bodies has become an environmental hazard, the greenhouse effect caused by excessive carbon dioxide emissions has produced serious climate disasters, and the environmental protection situation is very severe. Water eutrophication refers to the water pollution caused by the excessive content of plant nutrients such as nitrogen and phosphorus. These excess nutrients mainly come from urban and rural domestic sewage, as well as organic sewage and organic waste generated in industrial and agricultural production, especially breeding farms, slaughterhouses, meat p...

AI Technical Summary

Problems solved by technology

[0004] At present, the traditional sewage biochemical treatment technology is still mostly used to remove organic matter in sewage. Although this method can remove part of organic matter in sewage and reduce BOD and COD, the effluent still contains more nutrients such as nitrogen and phosphorus, which may easily cause water body enrichment. Nutritization

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