The streak-plate method was used to separate Chlorella colonies.The selected strain, induced by mutation using a laser, was cultured heterotrophically to obtain a high biomass.

• 用小球藻干粉培养草履虫和萼花臂尾轮虫,减低了水体中细菌的种类和数量，达到大量稳定培养轮虫的目的。