Microalgae collaborate with microorganisms to purify the aquaculture waste water

In this paper, a multi-level indoor wastewater treatment mode of `microalgae-microorganisms' for industrial marine aquaculture was established, a water purification facility for microalgae was designed, and the content of pollutants in water was explored by microalgae and microorganisms. The results showed that the `microalgae + microorganism' wastewater treatment system treated ammonia nitrogen (NH4+-N), nitrate nitrogen (NO₃^--N), nitroso nitrogen (NO₂^--N), inorganic nitrogen (TIN), inorganic phosphorus (PO₄ ^3--P), and chemical oxygen demand (COD) in wastewater. The maximum removal rates are 100%, 87%, 100%, 89%, 85% and 71%, respectively. Microalgae synergistic microbial water purification is conducive to the removal of nutrient rich substances in water, and provides a reference for ecological water purification and resource utilization of industrial agriculture wastewater.