Novel process for utilizing tail water of recirculating aquaculture system

Abstract

The invention discloses a novel tail water utilization process of a recirculating aquaculture system. The process comprises the following steps: (1) providing the recirculating aquaculture system, a tail water pretreatment system and a self-circulating water culture system; (2) precipitating and filtering tail water generated by the recirculating aquaculture system, and then determining the single body scale of the hydroponic system according to the mass of residual supernate; (3) disinfecting the tail water supernatant by using micro-nano bubble oxygenation and sterilization integrated equipment, conducting diluting by using clear water, with the diluted tail water supernatant as bottom water of a nutrient solution of the water culture system, adding elements for adjusting components, and feeding the tail water supernatant into the water culture system; (4) dynamically monitoring an EC value and a pH value of a water body of the water culture system; and (5) setting a reasonable time node, and carrying out oxygenation irrigation on the water culture system by utilizing micro-nano bubble oxygenation and sterilization integrated equipment. By means of the process, zero emission of the high-density circulating aquaculture system can be achieved; and the treated tail water is used for replacing part of nutritional ingredients, so that the hydroponic cost is reduced.

Description

Technical field: [0001] The invention belongs to the field of agricultural technology, and relates to a process for resource utilization of sewage in an aquaculture system. Background technique: [0002] The recirculating aquaculture system (RAS) responds to the needs of the transformation of traditional aquaculture to factory production, and is being piloted across the country. The fish and vegetable symbiosis system is a production mode that adheres to the concept of sustainable development and meets the requirements of green agriculture, and can be used for landscape modeling for people to watch. The micro-nano bubble technology can quickly increase the dissolved oxygen in the water body in a short time, and because the bubbles are small in size, they can stay in the water body for a long time, so it can be used for oxygenation irrigation, and the use of ozone source can realize water body sterilization and disinfection. [0003] RAS can theoretically achieve a water res...

AI Technical Summary

Problems solved by technology

[0003] RAS can theoretically achieve a water resource utilization rate of more than 95% and the highest breeding density at present. However, in the actual production process, with the increase of the breeding density, if the tail water is not discharged after each feeding, the feces in the fish pond will be reduced. Accumulated for a long time, and in a short period of time will cause a sharp deterioration of water quality and easy to cause pipe blockage

The discharge of RAS tail water will pollute natural water bodies, seriously restricting its promotion and development in cities

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