EWG has built independent Production of 80% RAS equipments

Characteristic variety RAS

EWG Recirculating aquaculture system consists of physical filtration system, biological filtration system, thermostatic system, sterilization and disinfection system, water quality online monitoring system and so on. In addition to the conventional fish recirculating aquaculture system, we have also developed a fresh aquatic transport recirculating system, oyster, shrimp and crab, rotifer, leech, stone frog and other RAS special features

Recirculating aquaculture system in Crab House

The “crab house” system is a small indoor industrial Recirculating aquaculture equipment for crab breeding and soft-shelled crab cultivation. It can be used for crab cultivation, fattening, temporary stocking and soft-shelled crab cultivation. It can also be used for other benthic aquatic animals.
The “crab house” system is divided into 10 levels, each floor of 10 “houses”, a total of 100 “houses”, can cultivate 100 adult crabs. Each 10 group is a set of recirculating aquaculture water treatment system.

RAS for Aquatic transport vehicle

Transport products: Aquatic seedlings, high value fresh aquatic products

Vehicle basic functions: 1, with water circulation filtration system and ammonia nitrogen adsorption function, in order to filter aquatic seedling excreta, control water quality; 2, with high-power oxygen pump and liquid oxygen tank, to ensure adequate oxygen supply; 3, temperature monitoring, salinity monitoring, dissolved oxygen concentration, PH value, illumination regulation and monitoring functions; It has independent water tank, and the cage can be distributed in the water tank.

RAS for oyster seedling

The oyster seedling circulating water aquaculture system has low cost, easy operation, strong durability and large fixed area. Oyster seedlings can be raised by two ways of upwelling or downwelling, which can make better use of space, high yield, easy to move, better seedling picking effect and labor saving during harvest.

RAS for Monopterus albus and loach

The main breeds of the system are loach, eel and leech. The breeds are captured in high-density “captivity” in the aquaculture tank which is always in a running water state. The excrement and residual feed of fish are recycled by water flow in the tank. The wide pond water around the tank can be used as a water purification area, and aquatic plants can be planted to plant nitrogen in the water. Phosphorus absorption, to avoid eutrophication of the water, but also timely removal of floats and solids, the real realization of low-carbon and efficient aquaculture.

Specifications & Models


High density RAS for rotifer

Recirculating aquaculture (RAS) is a highly intensive aquaculture method, which can carry out continuous production without season. Modern water quality treatment equipment is used to control the water quality, water temperature, water flow, dissolved oxygen, light, bait and other indicators manually, so as to create the most suitable ecological conditions for the growth and development of breeding varieties, seedling cultivation, open feed breeding and other links are in the artificially controlled water.

Other types of EWG-RAS

Recirculating aquaculture (RAS) combines the characteristics of aquaculture, microbiology, environmental science and other disciplines in a relatively closed space, using a variety of biological, physical and chemical methods to quickly remove the excrement of aquatic organisms and food residues, so that the water quality can be reused after purification, and the general water weight is reused. The utilization rate is over 90% on the premise of adding only a small amount of supplementary water, recycled water is used for intensive cultivation of high density aquatic organisms. EWG Company is committed to building a dual system of industrial recirculating aquaculture equipment + characteristic species recirculating aquaculture system.