Co-cultivation of Microalgae-Activated Sludge for Municipal Wastewater Treatment: Exploring the Performance, Microbial Co-Occurrence Patterns, Microbiota Dynamics and Function During the Startup Stage.

•Increasing the potential MGPM ratio by inoculating AS promotes the microalgal growth.•Microalgal content and T are the key factors driving microbial community succession.•Bacteria is inhibition-reconstruction mode, and adverse for fungi in co-culture.•The bacterial interspecies association directly related to the effluent quality.