Increasing Shrimp Nursery Efficiency with AirOxi Aeration Tubes

 

Introduction:

In the ever-evolving landscape of aquaculture, shrimp nurseries are becoming more and more important for survival of shrimps and getting sufficient return on investment from shrimp or prawn farming. And so ensuring the optimal conditions for shrimp nurseries is very important to success.

Adequate aeration plays a crucial role in creating a thriving environment for shrimp larvae, and among the various aeration methods available, diffused aeration using aeration tubes stands out as an innovative solution. This blog delves into the advantages of diffused aeration, specifically when utilizing AirOxi aeration tubes, shedding light on how this technology can improve shrimp nursery operations and help increase shrimp survival rates.

The Importance of Aeration in Shrimp Nurseries:

Maintaining proper oxygen levels is critical in shrimp nurseries, where factors such as high stocking densities and the rapid growth of larvae demand an increased oxygen supply. Inadequate aeration can lead to stress, slow growth, and increased vulnerability to diseases. To address these challenges, aquaculturists are turning to diffused aeration systems, and aeration tubes have emerged as a preferred choice due to their many benefits over traditional aeration methods.

Understanding Diffused Aeration:

Diffused aeration involves releasing fine bubbles into the water, creating a large surface area for efficient gas exchange. Aeration tubes, designed to evenly disperse bubbles throughout the water column, offer advantages such as increased oxygen transfer efficiency, reduced energy consumption, and the ability to create a more uniform environment for shrimp larvae.

The AirOxi Advantage:

Enter AirOxi – a leading brand in aeration technology. AirOxi aeration tubes are engineered to deliver optimal performance in aquaculture settings, particularly shrimp nurseries. The unique design of AirOxi tubes ensures a continuous release of fine bubbles, promoting efficient oxygen dissolution and water circulation. This not only enhances oxygen transfer but also helps maintain consistent water parameters crucial for the well-being of shrimp larvae. Shrimp nurseries require high water movement as well an AirOxi tubes are designed with the perfect balance of aeration and water movement.

Benefits of Diffused Aeration with AirOxi Tubes:

11.   Optimal Oxygen Transfer Efficiency:

·        The fine bubbles generated by AirOxi tubes maximize the surface area for oxygen transfer, ensuring that shrimp larvae receive an ample oxygen supply.

22.     Uniform Water Circulation:

·        The even dispersion of bubbles throughout the water column promotes uniform water circulation, preventing the formation of oxygen-deprived zones and maintaining a consistent environment for shrimp larvae. The water movement created by the AirOxi tubes is also important for health of shrimps.

33.     Energy Efficiency:

·        Compared to traditional aeration methods like paddle wheel aerators, diffused aeration using AirOxi tubes consumes 70% less energy, contributing to cost savings for shrimp farmers.

44. Durability and Longevity:

·        AirOxi aeration tubes are built to withstand the harsh conditions of aquaculture environments, ensuring long-term durability and reliable performance.

55.     Ease of Installation and Maintenance:

·        The user-friendly design of AirOxi tubes facilitates easy installation and maintenance, reducing downtime and streamlining nursery operations.

Incorporating Innovation into Shrimp Farming:

As shrimp farming continues to evolve, adaption new technologies becomes crucial for success. Diffused aeration using AirOxi tubes shows this commitment to innovation, offering shrimp farmers a reliable and efficient solution to improve water quality and optimize production, as well as reduce cost of production per ton of shrimp.

Conclusion:

In conclusion, the integration of diffused aeration with AirOxi aeration tubes represents a transformative approach to shrimp nursery management. By prioritizing optimal oxygen levels, water circulation, and energy efficiency, this technology contributes significantly to the overall health and productivity of shrimp larvae. As aqua farmers endeavours strive for sustainability and efficiency, adopting advanced aeration solutions like AirOxi becomes not only a choice but a necessity for a thriving shrimp nursery.

 

 

 

To know more call us at:

+91 – 9652122060

Email: marketing.airoxitube@gmail.com

           info@airoxi.com

           www.buy.airoxi.com

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AirX tube Latest technology in aeration hoses now in India

 

Vannamei shrimp farms need a very efficient aeration system. The bubbles of a diffused aeration system need to be very small. Especially for large farms – more than 2 acres in size, the aeration required is quite intense. Farmers usually provide aeration only on the periphery using paddle wheel aerators or diffused aeration using blowers and aeration tube. But for large farms of 2 acres and more, aeration needs to be much more uniform and there cannot be any dark areas where DO is low, so providing aeration only in the corners with a paddle wheel aeration system or with a regular aeration is not sufficient.

Such issues are faced in cage farms also, where the distance of the floating service area is very far from the actual cages and fish. Cage farming in India is a relatively nascent industry. Due to the natural flow of water in reservoir and ocean, most water parameters are balanced naturally. There is no sludge or waste to worry about and most of the time the dissolved oxygen, ammonia, pH etc are within the limits because natural flow of water and the eco system ensures they are suitable for marine life.

However there are still times when the dissolved oxygen levels within the cage go very low. And at such times a suitable aeration system is needed. In cage farms submersible or paddle wheel aerators cannot be used. And diffused aeration with aeration tubes and blower is not efficient since the depth of cages is around 10 feet or 3 meters. Hence low pressure fine bubble diffusers along with blowers are needed in such situations.

 Identifying the aeration needs of farmers, AirOxi is proud to offer the AirX tube. It is a special double walled EPDM tube which has very fine bubbles. The special 2 perforated wall structure ensures that that bubbles and pressure are proper throughout the length of the tube.

Any standard aeration tube can be used upto a maximum of 3 meter length because the pressure drop is quite high. But with the AirX tubes, the pressure drop is so low that it can be easily installed upto 20 meter length and still get uniform fine bubbles all along the length of the tube.

The material of construction EPDM is inert and this tube can be used in salt water and fresh water as well as RAS (recirculating Aquaculture System).

The tubes have very fine bubble that release at very low pressure so this product is ideal for grow out shrimp farms, RAS and transportation. However the water movement provided is very low so they are not very suitable for nurseries or biofloc.

Since the bubbles are very fine, the SOTR (Standard Oxygen Transfer Rate) is quite high. This makes them the ideal diffuser to use with oxygen cylinder and oxygen concentrators / generators.

The technical details for AirX tube are given below.

 

AirX tube technical details

Material – EPDM double walled tube. Inert and safe to use with most liquids

Dimensions – Inside diameter – 12 mm. Outside Diameter – 20 mm.

Compatible fittings - Fittings of ½” / 16 mm

Standard roll length – 100 mtr

Usage - Compatible for wide range of industrial, commercial, aquaculture in fresh, brackish or salt water, as well as effluent and sewage applications

Air Flow – Optimum – 5 LPM / 0.3 m3/hr. Maximum – 15 LPM / 0.9 m3/h3

Holes – Micro holes all around periphery and in both inner and outer tubes. Hole size is 0.2 mm

Usage length – Flexible and can be made into any grid or shape. Maximum length with single injection of air will depend on depth of installation and air pressure. Due to double wall holes, long lengths are possible with minimum reduction in pressure along the length unlike in single wall diffuser.

 To know more call us at:

+91 – 9652122060

Email: marketing.airoxitube@gmail.com

           info@airoxi.com

           www.buy.airoxi.com

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AirOxi® Spider – a versatile aeration device for shrimp farming

 

Shrimp farming is a very complex aquaculture system. The common shrimps farmed in India are:

·        Pacific white shrimp (L vannamei or P vannamei)

·        Giant tiger prawn (P. monodon)

 

Shrimps respond immediately to changes in dissolved oxygen levels

 

Although shrimps are scavengers and will eat almost anything, the farmed species are very sensitive to environment factors and micro- organisms. They are very susceptible to viral and bacterial infection, unlike the native fish which are a lot more resistant and hence easier to manage in a farm environment.

Even within the 2 major species farmed in India, L Vannamei is the more common species and they are very susceptible to the smallest changes in the environment like temperature, salinity, pH, stocking density, dissolved oxygen ammonia, salinity, etc.

Like all aquatic animals, the dissolved oxygen (DO) levels in the water have the highest impact on survival, immunity and growth of shrimps. Their entire metabolism changes in the presence of sufficient DO.

All other parameters remaining same, when proper dissolved is made available, feeding becomes better and faster. In shrimp farms, the difference in feeding time has been observed to reduce from 45 minutes to 10 minutes for the same amount of feed. This shows a huge difference in the health and growth of the shrimps.

 Types of aeration for shrimp culture

 There are many ways to provide aeration in an aquaculture farm. But the basic principle is the same – mix air and water together and this will dissolve some oxygen in the water.

take in air or oxygen and pass it through.

The paddle wheel aerators do it by splashing water in the air and this causes the droplets to dissolves some oxygen in the droplets as the come down. However these drops of water are very large and the surface area available is very less so the volume of oxygen that dissolves is very less

Submersible aerators like jet aerators are the other way to aerate shrimp and fish ponds. These suck in air from the atmosphere and pass it at high speed just below the surface of the water. The AirOXi®    Squid and AirOxi®    Scorpion are examples of this. These are better than paddle wheel aerators but still the velocity of air is so fast that the time available for oxygen to dissolve in the water

To get a proper exchange of air with water, and hence proper dissolution of oxygen, there are 3 things that are needed

-        Slow speed of air in water to increase time of air in the water

-        Small bubbles to increase surface area available for dissolution

-        Long distance of travel by the bubbles in the water so time available is longer

Aeration tubes are designed so that the bubble size is small and some special aeration tubes are designed so that pressure is low and the tubes work well with both, root blower and ring blower.
The aeration tubes like AirOxi®   are also designed so that they reduce the pressure and velocity of air coming from the blower, and so the bubbles rise up at a slow speed.

And finally to ensure that the distance is long enough to dissolve more oxygen, the aeration tubes must be installed near the bottom of the pond, ideally not more than 15 inches above the pond bottom.

The AirOxi®   Spider is a ready to use self sinking aeration device that is only 5 inches high and is very easy to assemble and use. It has one inlet of 0.5 inch and 6 outlets of 0.5 inch

These outlets are designed so that the high velocity and high pressure of air from the blower is divided properly and reduces the speed of bubbles in the water, and also breaks them into smaller very fine bubbles.

All these 3 conditions for good aeration in shrimp aquaculture ponds are met when one uses the AirOxi®  Spider. However if any shrimp farmer wishes to change the height of the AirOxi®   Spider, the lid is reversible and that will add another 2 inches to the height. More height can be added by tying the box of the spider with concrete blocks.

The box is hollow and weight can be put in it as per the water depth and buoyancy.

However if any farm requires customized height adjustment, then they can use just the 6 way of the self sinking aeration device and use any wooden stick to attach the tubes to this 6 way connector

AirOxi®  spider is very versatile

-        Any type and size of aeration tube with inside hole of 0.5 inch / 16 mm can be attached to it

-        The length of aeration tube that can be used with it can be changed from 1 mtr to 3 mtrs

-        The weight that is filled inside the empty Spider box can be changed as required

-        The height at which the aeration tubes are releasing air can be changed as needed

-        The pressure and velocity of air can be changed as required – slow air for high aeration, and fast air for high movement of water

-        This self sinking aeration device can be installed in any type of pond – nursery, growout, biofloc / BFT or  RAS

-        It can be installed in any type of water body – mud bottom pond, PE lined, Cement tanks, HDPE tanks, Fibre tanks.

-        The AirOxi ®  Spider will work with any blower – Diaphragm Air Pump, Ring blower, Two stage ring blower or Root blower

This versatility, ease of use and ease of assembly makes AirOXi (R)  Spider one of the best aeration devices available for aquaculture today.

You can visit the manufacturers website for more inforamtion and even buy it directly from their website

 

AirOxi is a registered trademark

 To know more call us at:

+91 – 9652122060

Email: marketing.airoxitube@gmail.com

           info@airoxi.com

           www.buy.airoxi.com

AirOxi MBBR – special bio media and aeration for bio filters used in RAS aquaculture

 

RAS is a highly intensive form or aquaculture. It works on the principal of zero or almost zero water exchange. In that sense it is the opposite of biofloc.

In biofloc or BFT, water is not exchange and probiotics are added so that microorganisms convert the sludge and waste, thus reducing the nitrates, nitrites, phosphates, ammonia etc in the water.

RAS is now being adapted by aqua farmers across the world. In fact many fish farmers are now moving away from standard designs given by suppliers of RAS system and making their own design. Whatever the design that maybe made by the farmer or supplier, there are 4 main elements in RAS

-        Water exchange, anywhere from 100% water exchange once in 24 hours to once in a week

-        Drum filter to remove physical impurities

-        Bio filter to balance the chemicals , reduce ammonia, phosphates etc.

-        Aeration in the tanks and also in the biofilter

RAS is an innovative method that conserves water and reduces environmental impacts. Among the various components that make up a successful RAS, biofilters play a pivotal role, and the importance of aeration within these biofilters cannot be overstated.

Biofilters is the backbone of any RAS system and it is responsible for maintaining water quality. The biofilter contains bacteria that convert the sludge and waste, breakdown the nitrite and ammonia and keep the water clean. They are nature’s filters.

To keep these bacteria growing and functioning well, they also need aeration. Hence aeration in the biofilter is of paramount importance. If the water flow rate calculations – the duration in which the water is to be exchanged 100% in the system – are mismatched with the quantity of bacteria and the aeration provided to the bacteria in the biofilter, the results can be catastrophic.

In such a case, the biofilter is not able to handle the excess load of ammonia, nitrites, etc. and their quantity starts increasing exponentially.

Insufficient aeration can lead to oxygen depletion within the biofilter, creating anaerobic zones. In these zones, different groups of bacteria can proliferate, including those that convert nitrates back into harmful ammonia. This phenomenon, known as denitrification, can reverse the nitrification process, reducing water quality and posing a threat to the health of the aquaculture system's inhabitants. Adequate aeration helps prevent the formation of anaerobic zones, maintaining a stable and healthy biofilter environment

A good RAS system needs to incorporate in its design 3 elements of the biofilter

-        Which bacteria culture to have in the bio filter – this will depend on the species of fish in the culture

-        What is the size of the bio filter – this will depend on frequency of water exchange, how long should 100% exchange take

-        What is the aeration to be provided in the biofilter – this will depend on the initial quantity of bacteria culture that you are adding in the biofilter and the MBBR media used

AirOxi offers very high intensive aeration system for the biofilters. When water is aerated, it allows oxygen to diffuse into the biofilter media, creating an oxygen-rich environment where the bacteria can efficiently carry out nitrification. Without proper aeration, the biofilter media could become oxygen-deprived, leading to a decline in bacterial activity and reduced nitrification efficiency.

The biofilter aeration system offered by AirOxi has 3 parts

-        AirOxi spider – with 6 way connector with one inlet and 6 outlets and without using AirOxi tube

-        Special MBBR media that floats and bounces on water developed by AirOxi

-        Blower to provide air through the 6 way spider

Apart from supporting beneficial bacteria, aeration also directly benefits fish health in RAS aquaculture systems. Fish require well-oxygenated water to breathe and grow optimally. If oxygen levels drop, fish can become stressed, leading to reduced immunity and increased susceptibility to diseases. Proper aeration in the biofilter ensures that oxygen is continuously supplied to the entire aquaculture system, supporting fish health and growth.

 

In conclusion, a good RAS system needs a well-designed biofilter and proper aeration needs to be given to this filter. This is the heart of the system and this is what separates RAS from other technologies of aquaculture.

Contact us at: +91 9652122060 or mail us at: info@airoxi.com

 

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Best aeration for fresh water fish culture

 

Fish culture in India is of various species – Tilapia, Mangur, Rohu, Catla, Mrigal etc. Most are fresh water fish and are mouth breathing, so it seems that when one does fish culture, there is not much need of artificial aeration. Considering the low density of farming and species of fish, as well as the long duration of growth, natural aeration is sufficient in many cases.

However, there are many times when artificial aeration is needed for even fish culture. Some of these situations can be:

-        High density fish farming where the density of fish is many times than what is found in its natural habitat

-        Requirement of faster growth and large weight of the fish in a shorter time

-        Balancing various parameters like pH, ammonia, phosphates, nitrates, nitrites, etc.

With low Dissolved Oxygen (DO) in the water, fish growth will slow down. The water parameters that oxygen helps regulate by oxidation – often called the Chemical Oxygen Demand (COD) will also suffer. As a result the sludge, extra feed, waste, nitrates, hydrogen sulfide, phosphates, ammonia etc. will not breakdown further and cause problems in the water.

Low dissolved oxygen would be first seen as increased time taken to finish the feed by the fish. Later one would notice that the fish are not increasing their feed intake and finally one would notice that the fish are not growing as expected. In the meantime if there is a disease, it will spread very fast due to low immunity of the fish. With low DO there is a high chance of infection and even the entire culture failing.

Although aeration and high dissolved oxygen in fish farming is important, the biggest challenge is that the cost of production needs to be very low. The price of fish and its fluctuation and long culture periods do not allow for high costs of aeration.

So a good aeration system for fresh water fish farm would need to be low cost as well as efficient.

One of the best methods for fish culture is diffused aeration. With this method the bubbles from the bottom of the pond or tanks provide high DO across the tanks or pond.  When tanks are used for fish farming – whether regular or biofloc fish farming (BFT), AirOxi Spider is often used because it is the most convenient and easy form or aeration.

 You can view many videos and calculate the aeration required from the aeration calculator available online.

You can contact us at: +91 7285017087 or mail us at: info@airoxi.com

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