Industrial aquaculture zero-emission resource recycling and purifying system and purifying process thereof

Abstract

The invention provides an industrial aquaculture zero-emission resource recycling and purifying system and a purifying process thereof. The purifying system comprises an aquaculture pond, a sediment adjusting pond, a microfiltration device, a vacuum suction filtration device, a three-stage biological purifying device, an ozone ultraviolet reactor and a clean water pond. A water inlet of the precipitation regulating tank is connected with a sludge outlet of the culture pond; a water inlet of the microfiltration device is connected with a water outlet of the precipitation regulating tank; a water inlet of the vacuum suction filtration device is respectively connected with a concentrated solution outlet of the microfiltration device and a precipitation solution outlet of the precipitation regulation tank; a water inlet of the third-stage biological purification device is connected with water outlets of the microfiltration device and the vacuum filtration device; the ozone ultraviolet reactor is connected to a water outlet of the three-stage biological purification device, a water inlet of the clean water tank is connected with a water outlet of the ozone ultraviolet reactor, and a water outlet of the clean water tank is communicated to the culture pond. Fish feces, feed residues and the like can be filtered, dried and separated, and cyclic utilization of culture pond water is achieved in cooperation with ex-situ remediation of biological floccules.

Description

technical field [0001] The invention relates to the field of agricultural aquaculture sewage treatment, in particular to a zero-discharge resource recovery and purification system for industrialized aquaculture and a purification process thereof. Background technique [0002] The 14th Five-Year Plan clearly puts forward a plan to give priority to the development of agriculture and rural areas. In the next five years, rural areas will vigorously develop animal husbandry and agriculture. Aquaculture plays an important role in the national food security strategy, providing a lot of high-quality protein for people's happy life. The current supply of aquatic products cannot meet the needs of the domestic market, and regulations such as the marine fishing moratorium and the ten-year fishing ban on the Yangtze River and many lakes have further promoted the development of the aquaculture industry to a high-density, high-yield farming model to meet the continuous growing demand. ...

AI Technical Summary

Problems solved by technology

However, in the intensive breeding process, the water pollution caused by the large amount of feeding is very serious. The natural ecological breeding process is characterized by serious eutrophication of the nearby surface water, and the effluent is black and smelly, which seriously damages the ecological environment.

The industrial recirculating aquaculture model will produce pollutants such as ammonia nitrogen or nitrite and other pathogens, which will poison aquatic products and affect production.

Adding fish medicine or antibiotics will affect product quality and damage the water environment

Images