MBBR+Recirculating Water Aquaculture: Building a New System of Green Aquaculture

In the context of the new era, the aquaculture industry faces many challenges and opportunities. With the increasing concern for environmental protection and food safety, the traditional aquaculture model has been difficult to meet the needs of sustainable development. Recirculating water aquaculture technology, as an efficient and environmentally friendly aquaculture model, has gradually received widespread attention in the industry.

01 Overview of Recirculating Water Aquaculture Technology

Recirculating Aquaculture System (RAS) is a kind of aquaculture mode that realizes water recycling through physical, chemical and biological treatment of aquaculture water. It combines advanced technologies in the fields of environmental engineering, civil engineering and construction, modern biotechnology and electronic information to provide a stable, reliable, comfortable and high-quality living environment for aquaculture organisms, thus realizing high-density aquaculture.

The main principle of recirculating water aquaculture is to treat the wastewater generated in the aquaculture process through a series of water treatment units to remove harmful pollutants such as residual bait and feces, ammonia nitrogen (TAN), nitrite nitrogen (NO₂-N) and other harmful pollutants in the water, and at the same time, replenish the dissolved oxygen, so as to make the water quality satisfy the needs of the normal growth of fish. The treated water is reintroduced into the breeding tank to form a cycle of use.02 MBBR Process Principles and Advantages

Mbbr Media

MBBR (Moving Bed Biofilm Reactor), Moving Bed Biofilm Reactor, is a highly efficient biological treatment technology. The principle is to add a certain number of suspended carriers in the reactor, these carriers have a large specific surface area, providing a good environment for microorganisms to attach. Microorganisms form biofilm on the surface of the carrier, and the organic matter and ammonia nitrogen and other pollutants in the sewage are decomposed and transformed by the microorganisms through contacting with the biofilm, thus realizing the purification of water quality.

MBBR process has the following advantages:

01 High efficiency
MBBR process can realize efficient water purification in a short time. Due to the large specific surface area of the suspended carrier, the attachment of microorganisms, the formation of biofilm is fast, so it can quickly decompose and transform the pollutants in the water. Compared with traditional biological treatment methods, MBBR has a higher treatment efficiency and is better able to meet the stringent water quality requirements of recirculating water aquaculture.

02 Stability
MBBR process has better stability and can adapt to the fluctuation of water quality. In the process of recycled water aquaculture, changes in water quality are inevitable, such as the increase in breeding density, changes in the amount of feed will lead to fluctuations in water quality, MBBR process due to the stability of the biofilm and the diversity of microorganisms, it can better adapt to these changes, to maintain the stability of water quality.

03 Small footprint
The reactor of MBBR process is filled with suspended carrier, which makes the attachment amount of microorganisms increase greatly, thus improving the treatment efficiency. At the same time, due to the relatively small size of the reactor, the footprint is also small. This saves a lot of space for the circulating water aquaculture system and improves the utilization rate of the aquaculture site.

04 Low running cost
The MBBR process has relatively low operating costs. Due to its high treatment efficiency, it is able to reduce the discharge and replenishment of water bodies, thus reducing the consumption of water resources. At the same time, the energy consumption of MBBR process is also relatively low, and it does not require a large number of aeration equipment and chemicals, so it can reduce the operating cost.

03 Applications of MBBR process

01 Water purification
One of the main applications of MBBR process in circulating water culture is water purification. By setting MBBR reactor in the circulating water system, it can effectively remove ammonia nitrogen, nitrite nitrogen and other harmful substances in the water. These substances are the main pollutants produced in the process of aquaculture, and have a great impact on the growth and health of aquaculture organisms. MBBR process decomposes and transforms these substances through the action of biofilm, so as to reduce their concentration and improve the water quality.

02 Breeding density increase
The application of MBBR process can increase the breeding density of circulating water culture. Because MBBR process can effectively purify water quality and keep water quality stable, it can increase the breeding density and improve the breeding yield. At the same time, MBBR process can also improve the growth rate and health of aquaculture organisms, and further improve the efficiency of aquaculture.

03 Disease prevention and control
MBBR process can also play a certain role in disease prevention and control. In the process of circulating water aquaculture, the deterioration of water quality is one of the important reasons for the occurrence of diseases in aquaculture organisms.MBBR process can reduce the concentration of harmful substances in water by purifying the water, so as to reduce the occurrence of diseases. At the same time, MBBR process can also improve the immunity of aquaculture organisms and enhance their ability to resist diseases.

04 MBBR process development prospects
With people's concern for environmental protection and food safety increasing, the application of recirculating water aquaculture technology has a broad prospect. MBBR process, as one of the key technologies in recirculating aquaculture, will be more widely used and developed. In the future, MBBR process will continue to optimize and innovate, improve its processing efficiency and stability, reduce operating costs, and provide stronger support for the development of recirculating water aquaculture.
At the same time, with the continuous progress of science and technology, MBBR process will be combined with other technologies to form a more complete circulating water aquaculture system. For example, combined with the Internet of Things technology to achieve real-time monitoring of water quality and remote control; combined with artificial intelligence technology to achieve intelligent management of the aquaculture process. The combination of these technologies will bring more innovation and development opportunities for recycled water aquaculture.