Fish Farming Business Using Biofloc Technology

Biofloc Technology——-

Now a days closed aquaculture systems are more safe for biosecurity, having environmental and marketing advantages over conventional extensive and semi intensive systems . Due to the re usage of water reduces introduction of pathogens and exotic to the external environment. Such a type of environment friendly technology for closed aquaculture is Biofloc Technology(BFT). More nutrient retention and recycling has been take place internally without so more cost compared to the conventional waste management technologies such as recirculating aquaculture systems and biofiltration, both needs complex internal filtration, expensive, laborious and economically not feasible. BFT is an innovative one, from conventional autotrophic to autotrophic- heterotrophic system. Microbes like bacteria are generally regarded as a disease causing agent in animal and plants. But in controlled conditions dense and active aerobic microbial communities control water qualities through immobilization of toxic metabolites to microbial protein and recycle the feed residue and raise the feed efficiency . Compared to the conventional photoautotrophic system BFT has more advantages such as diurnal variation of dissolved oxygen and hydrogen ion concentration is limited. Assimilation of inorganic nutrients through bacteria in suspension is an additional protein source than the biosynthesis of algae. Through the decomposition of organic matter by microorganisms leads to the production of new bacterial cell amounting 40-60% of the metabolized organic matter. This aerobic decomposition can be higher in high C/N ratio (through the addition carbohydrate source should be economically feasible) with high oxygenic conditions. BFT is a green approach in aquaculture knowing in different names such as zero exchange autotrophic- heterotrophic system active sludge or suspended bacterial based system , Single cell protein production system, Microbial floc system etc. Now biofloc has been focused internally as an alternative protein for fish meal, mainly produced in the form of microbial meal. Many researchers has been conducted the study of nutritional acceptability of biofloc.

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.

Biofloc technology application offers benefits in improving aquaculture production that could contribute to the achievement of sustainable development goals. This technology could result in higher productivity with less impact to the environment. Furthermore, biofloc systems may be developed and performed in integration with other food production, thus promoting productive integrated systems, aiming at producing more food and feed from the same area of land with fewer input. The biofloc technology is still in its infant stage. A lot more research is needed to optimize the system (in relation to operational parameters) e.g. in relation to nutrient recycling, MAMP production and immunological effects

Biofloc system – the need————-

Biofloc system was developed to improve the environmental control over the aquatic animal production. In aquaculture, the strong influential factors are the feed cost (accounting to 60% of the total production cost) and most limiting factor is the water/land availability. High stocking density and rearing of aquatic animals requires wastewater treatment. Biofloc system is a wastewater treatment which has gained vital importance as an approach in aquaculture.
The principle of this technique is the generation of nitrogen cycle by maintaining higher C: N ratio through stimulating heterotrophic microbial growth, which assimilates the nitrogenous waste that can be exploited by the cultured spices as a feed. The biofloc technology is not only effective in treating the waste but also grants nutrition to the aquatic animal.

The higher C : N is maintained through the addition of carbohydrate source (molasses) and the water quality is improved through the production of high quality single cell microbial protein. In such condition, dense microorganisms develop and function both as bioreactor controlling water quality and protein food source. Immobilization of toxic nitrogen species occurs more rapidly in bioflocs because the growth rate and microbial production per unit substrate of heterotrophs are ten-times greater than that of the autotrophic nitrifying bacteria. This technology is based on the principle of flocculation within the system.
The biofloc technology has been implemented in shrimp farming due to its bottom dwelling habit and resistance to environmental changes. Studies have been conducted to assess the larval growth and reproductive performance of shrimps and Nile tilapia. An improved breeding performance was observed in shrimp reared in the biofloc system when compared to that of normal culture practices. Similarly improved larval growth performance was also noticed.

Composition and nutritional value of biofloc——–

Biofloc is a heterogeneous aggregate of suspended particles and variety of microorganisms associated with extracellular polymeric substances. It is composed of microorganisms such as bacteria, algae, fungi, invertebrates and detritus, etc. It is a protein-rich live feed formed as a result of conversion of unused feed and excreta into a natural food in a culture system on exposure to sunlight. Each floc is held together in a loose matrix of mucus that is secreted by bacteria and bound by filamentous microorganisms or electrostatic attraction. Large flocs can be seen with the naked eye, but most of them are microscopic. Floc size range from 50 – 200 microns.
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.

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 biosecurity.
• 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.

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

All the things you need to do biofloc Raw Salt - https://amzn.to/2RwRlqY CaCo3 - https://amzn.to/2Gp1LCF https://s.click.aliexpress.com/e/_BfhX70xK Probiotics - https://amzn.to/2uzvIx4 TDS Meter - https://amzn.to/2U0cQlr https://s.click.aliexpress.com/e/_d9kdvgY Ph meter - https://amzn.to/37xsFE7 https://s.click.aliexpress.com/e/_d6zAaoM Ph Testing kit - https://amzn.to/2uHiQF1 https://s.click.aliexpress.com/e/_dXY3VAU Ammonia Test Kit - https://amzn.to/2U0hnEw DO / Dissolved Oxygen Test Kit - https://amzn.to/2O27DWH https://s.click.aliexpress.com/e/_d8o6CF6 Electro Magnetic Air Pump - https://s.click.aliexpress.com/e/_dS7udOG https://amzn.to/2RwWe33 Air Stone - https://amzn.to/30WZWGm https://s.click.aliexpress.com/e/_d6Cc34o Oxygen pump pipe - https://amzn.to/2Gp6GU7 https://s.click.aliexpress.com/e/_dVh4sjE Control Connector - https://amzn.to/2GuFEdQ https://s.click.aliexpress.com/e/_dTDLWaY https://s.click.aliexpress.com/e/_d6JR0S0 Biofloc Fish Farming Tank - https://amzn.to/37xkI1R https://s.click.aliexpress.com/e/_dVB4PW4 https://s.click.aliexpress.com/e/_dY3AIAu https://s.click.aliexpress.com/e/_dWA4aRE or contact 8617648383 Temperature Sensor - https://amzn.to/2RSDnP8 https://s.click.aliexpress.com/e/_d6mDzaM Imhoff Sedimentation Cone - https://amzn.to/2GEUe2N Digital Weighing Scale - https://amzn.to/2O3jaES https://s.click.aliexpress.com/e/_dUzkx1E Oxygen Tablet - https://s.click.aliexpress.com/e/_dV20v9E Some Book Link --- https://amzn.to/2PoHIrV https://amzn.to/38jOsQr https://amzn.to/2sWsItR

Download the list of instrument required for bioflock

Download C:N Ratio Pdf --