The emerging of microalgae culture technology offers the possibility to produce biofuelby wholesale. However, the soluble algal products(SAP) have uncertain effect on algal growth,which may restrict the reuse of culture medium. Scenedesmus sp. LX1and Haematococcuspluvislis were chosen to study the growth characteristic and the production rate of solublealgal products measured by DOC. The influence of soluble algal products on alga growth wasalso tested. What’s more, we investigated the culture condition inf...