Method for breeding chlorella phytoplankton from cyanobacterial bloom

Abstract

The invention discloses a method for breeding chlorella phytoplankton from cyanobacterial bloom. The method comprises the following steps: acquiring the cyanobacterial bloom from a water body in which the cyanobacterial bloom occurs and properly concentrating the cyanobacterial bloom; aerating, rotting and degrading the concentrated cyanobacterial bloom at 18-45 DEG C; then adding running water to dilute a total phosphor concentration to 5.0-15.9mg / L after the cyanobacterial bloom is degraded for 25-40 days until the water body becomes odorous and is represented in black brown or dark brown, and adding a mineral substance mixture which is composed of calcium salt, magnesium salt, iron salt and potassium salt; and conducting cultivation for several days, so that chlorella, which is high in concentration and purity, is obtained. With the application of the method, the cyanobacterial bloom can be transformed into the chlorella phytoplankton, so that innocent treatment and utilization of the cyanobacterial bloom are promoted and transformation of nutrient substances in the water body is accelerated; the method can be directly used for processing the cyanobacterial bloom; and in addition, the culture method provided by the invention is simple and convenient to implement; therefore, a good way is provided for resource utilization of the cyanobacterial bloom.

Description

technical field

[0001] The invention relates to a method for culturing phytoplankton, in particular to a method for cultivating phytoplankton of the Chlorophyta phylum Chlorella by utilizing cyanobacterial blooms. Background technique

[0002] The eutrophication of water bodies leads to the frequent occurrence of algal blooms all over the world, and the most common algal blooms in China are cyanobacterial blooms, especially those of the cyanobacteria phylum Microcystis. This bloom has harmful effects on drinking water sources, shipping, aquaculture, landscapes, tourism, and more. The current treatment method for cyanobacterial blooms is mainly as fertilizer. Freshwater eutrophic lakes in China, such as Taihu Lake, Dianchi Lake and other cyanobacteria blooms, have huge biomass. Although cyanobacterial blooms contain algal toxins, they are rich in nutrients. In addition to being rich in protein, they also contain fat, carbohydrates, minerals, etc. substances and other nutrie...