Fiber carrier for forming film based on microalgae adsorbed by straw as well as preparation method and application of fiber carrier

Abstract

The invention discloses a fiber carrier for forming a film based on microalgae adsorbed by straw as well as a preparation method and application of the fiber carrier. The straw fiber carrier is used for adsorbing the microalgae and forming a biological film. A film forming method comprises the steps of (1) preliminary culture of microalgae inoculum; (2) preparing a straw fiber carrier bed layer; (3) culturing and harvesting a microalgae biological film; and (4) regenerating the microalgae biological film. The straw biological carrier is a microalgae biological film. carrier which is low in price, durable and easy to apply in a large scale, and a biological adsorbent is environment-friendly, rough in surface, high in yield, reproducible, wide in distribution and free of biotoxicity. While supporting microalgae cells to adhere and form a film, the composite film can be further used for removing various pollutants in wastewater, and can also be used as a raw material for producing organic fertilizers, high-activity biochar, energy sources and chemicals. When the fiber carrier is partially degraded into semi-rotten straw by fungi, the semi-rotten straw can be used as an organic compound fertilizer for ecological breeding or anaerobic fermentation for biogas production.

Description

technical field [0001] The invention belongs to the technical field of application of microalgae biotechnology, and in particular relates to a fiber carrier based on straw-based adsorption of microalgae to form a film, a preparation method and an application thereof. Background technique [0002] At present, the mainstream production and cultivation mode or wastewater treatment mode of microalgae is mainly suspended. However, the suspension culture of microalgae has the disadvantages of low cell dry matter concentration, large energy and water consumption, low gas mass transfer efficiency, and difficult harvesting of microalgae biomass. Moreover, due to the insufficient separation of algae and water, it is necessary to use high-energy technologies such as air flotation, centrifugation, and flocculation for harvesting, and the cost is relatively high. Compared with suspension culture, algae cells and waste water are naturally separated in the attached culture system, and mic...

AI Technical Summary

Problems solved by technology

Membrane supports such as glass fiber filter paper, stainless steel plate, aluminum plate, and metal mesh that are widely studied and used are not only expensive for commercial application, difficult to obtain, but also partly easy to corrode and rust; filter paper, newspaper, and microporous filter Membranes and other materials have low mechanical strength and poor reusability, and are not suitable for large-scale mechanical algae scraping operations; cotton fabrics such as cotton cloth and cotton rope are natural fibers, which will corrode and degrade when soaked in wastewater for a long time, resulting in large losses

And in the process of corrosion deterioration or rusting, various organic or inorganic substances may be released into the culture medium, such as corrosion and rusting of metal plates, corrosion and dissolution of cotton fabrics and paper, etc., which have potential effects on algae growth or physiological toxicity

Roughening the surface of the carrier by sanding, laser etching, 3D printing and microstructuring can promote the attachment of microalgae cells, but these methods are relatively time-consuming, laborious and expensive, and are not suitable for large-scale

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