Yes, BIOFLOC technology is one of the best method for fish farming nowadays . Though there are several best methods for fish farming, Biofloc is cost effective & easy to lunch .
What is Biofloc Technology ?
It is an innovative and cost-effective technology in which toxic materials to the fish and shellfish such as Nitrate, Nitrite, Ammonia can be converted to useful product, ie., proteinaceous feed.
It is the technology used in aquaculture system with limited or zero water exchange under high stocking density, strong aeration and biota formed by biofloc.The culture of biofloc will be productive in the case of culture tanks exposed to sun.
Benefits of Biofloc culture system
- Eco-friendly culture system.
- It reduces environmental impact.
- Improves land and water use efficiency
- Limited or zero water exchange
- Higher productivity (It enhances survival rate, growth performance, feed conversion in the culture systems of fish).
- Higher bio-security.
- Reduces water pollution and the risk of introduction and spread of pathogens
- Cost-effective feed production.
- It reduces utilization of protein rich feed and cost of standard feed.
- It reduces the pressure on capture fisheries ie., use of cheaper food fish and trash fish for fish feed formulation.
Every year interested practitioners, scientists, and others come together at various aquaculture conferences to present and discuss the most recent findings related to BFT. Look for a Biofloc Session at the next World Aquaculture Society (WAS) or Aquacultural Engineering Society (AES) meeting; anyone with any interest in BFT is encouraged to attend and the sessions are filled with discussions about current BFT issues. A Biofloc Steering Committee made up of members from around the world strives to ensure that the most relevant issues are addressed and the group welcomes feedback and questions from anyone interested in BFT.
Disadvantages of Biofloc Technology
- Increased energy requirement for mixing and aeration
- Reduced response time because water respiration rates are elevated
- Start-up period required
- Alkalinity supplementation required
- Increased pollution potential from nitrate accumulation
- Inconsistent and seasonal performance for sunlight-exposed systems
A good nutritional value is found in biofloc. The dry weight protein ranges from 25 – 50 percent, fat ranges 0.5 – 15 percent. It is a good source of vitamins and minerals, particularly phosphorous. It also has an effect similar to probiotics. The dried biofloc is proposed as an ingredient to replace the fishmeal or soybean in the feed. The nutritional quality is good; however, only limited qualities are available.
Furthermore, the cost-effectiveness of producing and drying biofloc solids at a commercial scale is a challenge.
BIOFLOC technology in different countries in the world
But this method is not good for all types of fishes or Aqua Animals. Such as if you want to production SHRIMP , Than i would suggest you to use RAS System.
For SHRIMP Production Biofloc system / Technology is not Best . Because ———————
Regarding water quality, water temperature, dissolved oxygen (DO) and salinity were all within acceptable ranges for Pacific white shrimp. Considering pH, it was relatively constant in the RAS system but significantly lower in the Biofloc system and possibly caused some stress in the animals.
The RAS system had significantly lower turbidity, reflecting the additional mechanical filtration; it was higher in the BIOFLOC system but it is not unusual to have high turbidity in biofloc systems.
Measured ammonia levels were regularly higher in the RAS system, resulting in a significant difference between the treatments; however, all ammonia concentrations measured were below the estimated safe levels for L. vannamei.
Regarding shrimp production, the animals reached a significantly larger average size of 11.6 grams in the RAS treatment compared to the 11.1 grams attained in the BIOFLOC treatment , paralleling the considerably greater biomass production in the RAS systems. Feed conversion ratio in the RAS system was 1.5:1, significantly better than the 1.8:1 in the BIOFLOC system. Shrimp survival was not significantly different between the treatments, but mean survival in the RAS system was markedly higher at 78 percent in contrast with 69 percent in the BIOFLOC treatment, resulting in substantially better shrimp production in the RAS system.
But if you think about building cost / making cost , than Biofloc Technology is relatively low expensive than RAS System.