Purification system applied to high-ammonia-nitrogen aquaculture wastewater

The utility model belongs to the field of sewage treatment, and particularly relates to a purification system applied to high-ammonia-nitrogen aquaculture wastewater. High-ammonia-nitrogen breeding wastewater can be treated with low cost, high efficiency and high quality; according to the technical scheme, the purification system applied to the high-ammonia-nitrogen aquaculture wastewater comprises a pretreatment unit, a membrane separation unit, a high-ammonia-nitrogen treatment unit and a biochemical treatment unit. Wherein the pretreatment unit comprises a pretreatment water inlet and a pretreatment water outlet. The membrane separation unit comprises a membrane separation water inlet, a first membrane separation water outlet and a second membrane separation water outlet, and the pretreatment water outlet is communicated with the membrane separation water inlet. The high-ammonia-nitrogen treatment unit at least comprises a high-ammonia-nitrogen water inlet, and the high-ammonia-nitrogen water inlet is comm