Biological microalgal treatment, purification and recycling method for garbage leachate wastewater

The invention provides a biological microalgal treatment, purification and recycling method for garbage leachate wastewater. The method comprises the following steps of wastewater collection, wastewater pretreatment, treatment pond construction, biological ceramic treatment, aeration treatment, nutrition regulation, microalgal treatment and utilization and water recycling. According to the invention, biological ceramic and microalgae are mainly used for biological treatment; coagulation precipitation treatment, oxidation reaction, ammonia stripping and activated carbon adsorption pretreatment are firstly carried out, so toxic impurities in water are removed, and normal biological treatment is prevented from being influenced; then a microbial film on a biological ceramic sheet reacts with garbage penetrating fluid wastewater, and organic pollutants in the sewage are absorbed as nutrients for the metabolism of the microbial film, and aeration oxygenation is matched to create a living environment suitable for th