Aeration system that is a reliable method for your aquaculture aeration needs

 

Aeration system that is a reliable method for your aquaculture aeration needs

How are AirOxi tubes are better than cheaper rubber tubes and International aeration tubes.

• Rigorous quality testing of every coil of AirOxi aeration tube – you can watch our testing videos on our YouTube channel or contact us for more information
• Continuous feedback from our customers and farmers on the product quality and the various suggestions they have for improvement
• Research on latest materials and technologies available to develop new products for the diffused aeration industry

 

Based on such feedback we have continuously developed new products for Aeration. For instance we have specialized aeration tubes and aeration system for Biofloc culture

Biofloc aeration is very different from aeration in growout ponds

• Aeration required is intense because the BOD (Biological Oxygen Demand) is substantially higher due to probiotics and phytoplankton that feed on the sludge – to ensure the carbon-nitrogen cycle is balanced. The dissolved oxygen required is hence quite high as compared to grow out ponds.

 

• Aeration needed in biofloc culture (BFT) is almost 50% more than what is needed in regular earthen bottom ponds

 

• Usually, Biolfoc aquaculture is done in tanks or small-sized ponds, often indoors or covered in shade, in order to manage them better. This results in a smaller surface area of the water exposed to the atmosphere and hence the natural dissolution of oxygen is less.

 

• Moreover sunlight and hence algae giving natural oxygen is also very less, so artificial aeration needs to be much more than in grow out ponds. And the traditional methods of paddlewheel aerator or such surface aerators cannot be used in tanks

 

• The floc needs to be constantly moved and the water movement needed is high. So the diffused aeration needs to also agitate the water. Hence the diffused aeration system cannot be very fine as done in hatcheries, otherwise, it may give good dissolved oxygen but still, the performance may not be suitable for BFT

To help provide the most efficient aeration, AirOxi has developed and launched 3 special aeration tubes :

AirOxi NC – 16 mm

AirOxi – NC 16 mm aeration tube is made by creating precise holes at equal distances in a thin-walled tube. The bubbles are about 50% bigger than the high-quality AirOxi tubes, but these bubbles quickly break down in the sludge and floc in the water. As a result, the overall Dissolved Oxygen is still good, and the large bubbles give the water a high movement.

Due to the good water movement, and the big bubble size that breaks down with floc and sludge, it is ideal for Biofloc and mud bottom ponds

AirOxi – NC 16 mm is

• Lightweight
• High airflow – 2 m3/hour or 30 LPM per meter
• Large bubble size that breaks down in the presence of sludge and floc
• Low cost – can be treated as a one-season product
• Low wall thickness making it easy to clean IF at all it gets blocked
• Moderate SOTR – oxygen dissolving capacity is about 20% less than AirOxi aeration tube
• Very good water movement provided by the bubbles
• Works at very low pressure and can be used with root blower, ring blower or even air pumps

AirOxi Star

The proprietary registered / patented design of AirOxi tube star especially made for aquaculture provides three major advantageous highlights:

• Aeration with minimum cleaning and blocking
• High movement of water
• Reduced back pressure on the blower motor

The tube has crests and troughs along the length – it’s unique design makes sure that very fine bubbles are released from the troughs and not from the crests.

This special design offers air at greater speed from the trough in the decreased thickness area. This ensures no air flows out from the greater thickness location of the crest. Because of this special design, air float comes out at a higher pace and as a result, offers the required motion of water in BFT aquaculture offering better aeration. This additionally affects the decreased choking and blockading of the aeration tube, as a consequence lowering the frequency of cleaning and also offers superior aquaculture aeration.

And since the air is released in a smaller surface area, it comes out with pressure and provides the movement needed in biofloc tank.

 

AirOxi XTRA

AirOxi Xtra is a specialized rough finished tube with a large bubble size and 25 mm outside diameter.

It is becoming the product of choice for many biofloc consultants who see the benefit of good water movement and moderate aeration. AirOxi Xtra has a large bubble size which reduces oxygen dissolution by about 20% as compared to the other high-efficiency AirOxi Aeration tubes.

However, the water in biofloc farms has a very high number of suspended particles – sludge, waste, probiotics, etc. As a result, although the bubbles are bigger at the exit from the tube, they breakdown almost instantly and provide good SOTR and oxygen dissolution. Air flows out in bigger bubbles allowing greater movement. The flow of air is 30 LPM / 2m3 per hour per meter which is even though the same as the regular aeration tube but with a bigger micro bubble size, so the holes don’t get blocked soon and maintenance required is less.

Since the tube blocks very little and has high positive pressure, the maintenance is low. Hence with greater functionality it is one of the most preferred choices among the fish farmers.

Overview of our Quality

Every roll of AirOxi tube goes through 8 rigorous quality checks of dimensions, flow rate, and material properties

Let’s take you through the various challenges that our product has to meet before it reaches you:

• Our AirOxi tube products are ISO 9001:2015 certified, which ensures meeting all the international quality standard tests that product certification requires.
• All AirOxi tubes are RoHS certified – They do not contain any Hazardous material as defined by the RoHS standard
• We ensure fittings and accessories are available for all models and sizes
• Every roll is tested for the flow rate of a minimum of 50 LPM / 2 m3/hr at a depth of 1 mtr in our test tanks
• We regularly install various batches of tubes in our test tanks and check which formulations of raw materials work best

These quality testing and maintenance processes provide us an opportunity to bring our customer’s AirOxi tubes, which are unparalleled in quality metrics and perform far better than those of the Chinese knock-offs that are available at a similar or little cheaper price.

That is why we always suggest please check the AirOxi QR code mark before buying tubes for your aquaculture or hydroponics requirements. To save a few rupees, customers often end up spending thousands of rupees in replacing the tubes, again and again, so thoroughly ensure you get the value of your money’s worth from the product you purchase.

 

Why Choose AirOxi Tube

AirOxi Tube is an Indian brand operating from Gujarat, and the company has manufacturing expertise of more than 50 years. Our decades of experience in the field allow us to deliver the best to our customers. As an Indian organization, we also think like Indians, that is why we understand the value of the money that our customers spend in buying the tubes. It is because as an Indian organization we are not limited to selling and purchasing products, instead, we ensure that the entire aeration solution is provided to the aqua farmer. Our quality testing metrics ensure what you buy from us is the best in the market. At AirOxi tube we serve our customers with premium quality products and service guidelines. To know more about our products please get in touch with us call: +91 7285017087

 

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A simple way to reduce cost in shrimp culture

 

Current international shrimp prices are quite low, due to many factors. Import restrictions from China, low cost export of shrimp to USA from South American countries like Ecuador, etc. Moreover cost of feed and labor has increased drastically over the last couple of years, while selling price has reduced drastically.  Both these are causing enormous pressure of cost reduction on the aquaculture farmer, especially the shrimp farmer.

As a farmer, you don’t have control on the selling price of shrimp which is largely dependent on international prices and decided by processing units.

However you can control the input costs.

The 3 largest input costs for a shrimp farm are:

•        Cost of feed
•        Cost of seed
•        Cost of aeration

Good quality feed and good quality seed cannot be compromised. However the cost of aeration can be reduced to a large extent – by almost 60% - if proper equipment is used. Diffused aeration is very often found to be 3 times more energy efficient than paddle wheel aerators.

Most large fish and shrimp farms use paddle wheel or similar surface aeration methods. Such aerators spend almost 75% of their energy in moving the water, rather than aeration. They are really water movement devices, although one calls them aerators.

Artificial aeration is efficient only when the surface area available for interaction between the air and water is high, and the time of contact is long. With paddle wheel aerators, the drops of water are quite big – almost 5 to 20 mm big. And the splash down in a very short time.

Compared to this, diffused aeration provides very fine micro bubbles in the water using highly efficient airoxi tube and blowers. The bubbles are about 1 mm in diameter. And they further breakdown into even finer bubbles in salt water used for shrimp culture. In fact the floc in the ponds and nurseries increases the efficiency of aeration, so diffused aeration using blowers and aeration tube increases in efficiency as the culture time increases.

A comparative table of efficiency is given below. As you can see – blower and airoxi tube / aeration tube diffused aeration is highly efficient and the high SOTR (Standard Oxygen Transfer Rate) is almost 3 times that of paddle wheel aerator. This makes the SAE (Standard Aeration Efficiency) very high and translates into saving of electricity cost of almost 60%.

And this is after considering that you use the paddle aerators to move water – but only 1 hour x 4 times a day.

To ensure a good balance, use the paddle wheels only as water moving equipment, and not for aeration. Let the blower and aeration tubes give you the required aeration.

You can even calculate your aeration requirement for your shrimp nursery or shrimp farm using the online aeration calculator on www.airoxi.com/calculator

 

Comparative performance of AirOxi ^TM Products v/s Paddle Aerator

(Comparison based on market feedback from customers)

Parameter	AirOxi TM Tube with piping and blower	Paddle Aerator
Type of aeration	Fine Bubble Diffusion (1mm and less)	Mechanical and surface , through droplets (20 mm)
Numbers required per Hectare	250 mtr / 5 HP blower and piping	8 nos x 2 HP each
Total Power required / hectare for average stocking density	5 HP	16  HP
Biomass supported / HP	1000 Kg per HP.	350 Kg per HP
Approximate Initial Cost	1.5 to 1.8 lacs   (blower, piping, AirOxi Tube, etc)	2.40 lac   (30,000/- x  8 nos)
DO – Kg / Hour / HP	3.6 Kg / HP / hour	1.2 Kg – 1.4 Kg / HP / hour
Average DO levels observed in similar conditions	Day time – 8.5 to 9.0 Night – 5.0 to 6.0	Day time – 7 to 7.5 Night – 4.0 to 5.0
Time taken for same increase in DO (SOTR - Standard Oxygen Transfer Rate)	20 minutes	60 minutes
Power Cost (considering industrial power at 7/- per unit) – operating 20 hours a day, for 3 months use in a season. For AirOxi tube  – we are also considering 1 HP x 4 nos of paddle aerator for water circulation	47,250/- for Oxygenation   3,780/- for Water movement (2 hours)   Total – 51,030/-	1,51,200/-
Stocking Density possible because of high DO	High to very high	Low to medium
Noise Levels	Very low	High
Operate during feeding time	Yes	No
Moving parts and maintenance	Very Low	High

 

AirOxi tube offers aeration tubes with 3 different bubble sizes

We at AirOxi tube are very particular about ensuring that every single roll that comes out of the production line is of the highest standards expected from AirOxi.

We perform seven stringent quality checks on every single roll of AirOxi to ensure that when you use our aeration tubes for your aquaculture aeration, the results is always perfect.

One of the latest tests that we perform is to analyse the particle size and hole size in the tube, at regular intervals.

The accompanying pictures show how different models of AirOxi tube have different grain structure and hole size.

As you can see clearly from these images:

• We ensure proper uniform grain structure in every type and model of AirOxi tube

• Every type of AirOxi tube is genuinely different – and each is designed for a particular purpose

• AirOxi Pearl – very smooth finish with very very fine bubbles – 0.2 to 0.5 mm size – ideal for high aeration, low movement like in RAS. When used in not so clean water it may need higher frequency of cleaning.

• AirOxi regular tube – Medium finish, bubble size 0.5 to 1.0 mm – ideal for most applications like RAS, Biofloc, Growout ponds, Hatcheries, etc. – gives high aeration and moderate water movement with moderate frequency of cleaning

• AirOxi Xtra – Rough tube with big bubbles for extra water movement and low aeration, and low maintenance. Bubble size is 1.0 mm and above

These are the tubes with major changes in grain structure of the tube. Then of course there is the wide range of sizes and also special application tubes for biofloc aeration like NC-16 and Star.

Do visit our website products page for more details about our aeration products and ready to use diffusers.

Spider is a very versatile product from AirOxi

AirOxi launched the Spider, a ready to use aeration device few years ago. Since then many improvements and modifications have taken place.

All such changes are helping the aeration in aquaculture ponds to become more and more efficient.

Over the years AirOxi has modified the design to make it stronger, to allow it to take more weight and fill more weight. Such design changes makes the spider very versatile and useful in various high density fish farming and use it for aquaculture aeration in nurseries, shrimp nurseries, for biofloc aeration and for RAS aeration.

The 6 way connector at the top can be used to connect airoxi aeration tube in various ways as demonstrated in the picture here. The size of airoxi tube can be also changed from the standard 25 mm to 22 mm, 38 mm or 19 mm

-          It can be used as 8 inch x 6 pieces , totalling 1.2 mtr of airoxi tube

-          It can be looped to use a length of 0.6 mtr x 3 pieces – 1.8 mtr

-          It can also be made into a flower shape to use a total of 8 inch x 6 pieces + 7 inch x 6 pieces , totalling to 2.30 mtr of AirOxi tube

Inlet nipple can be changed to ¾” (0.75 inch) inlet or standard 16 mm (0.5 inch) inlet.

Spider is now available to buy online on the Amazon, Flipkart and also on airoxi website.

Even after so many years, Spider continues to be the most ideal and versatile ready to use aeration diffuser for aquaculture and fish farming, shrimp farming.

 

 

Getting high Dissolved Oxygen in RAS aquaculture

 

Blog 2 – June 2022

 

Getting high Dissolved Oxygen in RAS aquaculture

AirOxi specializes in aquaculture aeration in all types of culture - Hatcheries, nurseries, biofloc (BFT) aeration, RAS, Growout ponds and IPRS (Raceway system). Whether for shrimp or fish you can depend on the wide range of AirOxi products for your high intensity fish farming or economical aeration for shrimp farming.

A lot of progressive farmers are now using RAS for fish aquaculture in tanks. Such intensive systems needs high level of oxygen. There are 3 ways to get high dissolved oxygen in RAS

 

1)     Use high amount of air at the bio filter and in each tank using AirOxi tube and double stage turbine blower.

              
                                   

                               with         
 

 

Key features of this system is

-        Low initial cost and low running cost

-        High air flow – almost 2500 LPM

-        The system has high amount of air flow so it is easy to divide the output air into various outlets and aerate multiple tanks with one blower

-        Moderate SOTR (Standard Oxygen Transfer Rate) - Sufficient to maintain a DO level of 4 to 7 ppm

-        1 HP of blower with 25 mtrs of AirOxi tube can support 8 -10 tons of fish biomass in RAS with proper water exchange

-        This system gives almost 4-6% dissolution at 4-5 feet depth of water

This system is ideal where there are a lot of small tanks and a central bio filter. All tanks and bio filters can be given aeration from a single blower.

 

However some farmers may want to maintain higher DO than the standard 4- 6 ppm range. Or the stocking density maybe higher, or the species of fish used in RAS culture maybe such that it needs more dissolved oxygen.

Or there maybe constraints of how much power is available at the site.

For such cases there are two very effective aeration solutions available.

2)     One effective solution to get good dissolved oxygen with lower power is the Micro Bubble Generator. This 1 HP system mixes very fine bubbles of air with water and distributes them evenly at the discharge.

Because the bubbles are so fine it gives a high SOTR and one unit can support almost 4 tons of Fish biomass. The flow rate is only 3 to 5 LPM but because the bubbles stay in the water much longer, the dissolution of oxygen is higher – almost 15% at a depth of 4-5 feet of water

 

The micro bubble generator is very quiet machine and can be used on top of the tank as in the picture. This system is ideal for a layout where there are large tanks and each tank has high fish biomass, so each tank can be given proper aeration individually

                             

                              

Often an RAS system needs very high dissolved oxygen and yet is divided into small tanks and each tank is not big enough to have its own micro bubble generator.

 

So for such applications RAS aeration requirements, we can have a central oxygen concentrator with very fine bubble diffusers.

The smallest bubbles in diffusers are possible through ceramic plates or double walled diffusers

 

These can be combined with an oxygen concentrator to ensure very fine bubbles of 93% or almost pure oxygen dissolve in the RAS aquaculture system and give high dissolved oxygen

Such a concentrator can be kept centrally and the piping can be taken to each tank individually. At the tanks, the double walled diffuser or the ceramic plate can be used to ensure very fine bubbles diffuse the oxygen.

 

Such a system gives almost 25% dissolution at 4-5 feet depth of water

                                                                                                                                                                                                                                             

 

OR

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For more information and interesting blogs about improving aeration in your high density shrimp farms or high density fish farms, do visit our website. All AirOxi products can be purchased online or through our distributors.

                                                                                                               

AirOxi partners with Redox of Norway for its Oxygen Concentrator and EPDM diffusers.

 

AirOxi tubes are a reputed brand brand of choice when it comes to aquaculture and especially intensive aeration that is needed in shrimp farming. Hatcheries, nurseries, biofloc (BFT) aeration, RAS, Growout ponds and IPRS (Raceway system) have all benefitted with the various new products and technologies that AirOxi brings.

The requirement for dissolved oxygen is quite high in intensive aquaculture, especially in Recirculating Aquaculture System or RAS.

To help supplement the oxygen requirements when the fish grow in size, oxygen concentrators are very useful. They work on the membrane technology to remove nitrogen from air right at the point of installation, and provide upto 93% pure oxygen.

Redox of Norway uses proprietary membranes and technology to make the oxygen concentrator very compact. This ensure very high quality of pure oxygen.

Some of the key points of the Redox Oxygen Concentrator distributed by AirOxi are:

-        10 LPM flow rate sufficient to support 3 ton of fish biomass in RAS, without any additional aeration

-        93% pure oxygen

-        Compact design – small size with latest technology

-        Weight 30 Kg

-        Size 300 mm x 500 mm x 300 mm – about the size of regular home computer

-        Very low noise during operation

-        Designed for industrial and farm use – in harsh conditions

-        Designed for continuous use as required in aquaculture

-        Portable without any fixed fittings - you can easily carry it and use it in whichever tank or pond requires it

-        Trusted technology and brand from Norway with years of experience in oxygenation

-        Distribution by AirOxi – one of the most trusted aeration brands in aquaculture

The oxygen concentrator has been used, tested and recommended by some of the most reputed aquaculture names in the country.

The standard 10 litres per minute (LPM) product has been used by

-        National Fisheries Development Board (NFDB)

-        National Freshwater Fish Brood Bank

-        Central Marine Fisheries Research Institute

-        Central Institute of Brackish Aquaculture (CIBA)

-        Uttarakhand Fish Farmers Development Agency (UKFFDA)

-        Central Inland Fisheries Research Institute (CIFRI)

-        Ananda Enterprises India Pvt Ltd

-        Vaisakhi Bio-Reserves Pvt Ltd

These reputed organizations have not only used it but also analyzed its performance and have been thoroughly satisfied with the oxygenation to place repeat orders.

Oxygen concentrators are low noise, low power consuming very efficient equipment to aerate fish and shrimp farms and nurseries. The initial capital cost is high but it is offset by high dissolved oxygen with almost zero maintenance.

For more information and interesting blogs about improving aeration in your high density shrimp farms or high density fish farms, do visit our website. All AirOxi products can be purchased online or through our distributors.