Aquaculture Tanks in-depth Demand Report
aquaculture tanks, with its efficiency and innovation, has become a new favorite of people. It undergoes a strict testing process before its final launch so it ensures faultless quality and stable performance. Also, with the strong product quality as the foundation, it takes new markets by storm and succeeds in attracting entirely new prospects and customers for Shandong Wolize Biotechnology Co., Ltd..
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Process Design
Land-based Industrialized Recirculating Aquaculture System (RAS) (RAS)
Land-based Industrialized Recirculating Aquaculture System (RAS) (RAS) employs modern industrial technologies—including engineering, biotechnology, mechanical equipment, information systems, and scientific management—to comprehensively control the aquaculture process. It creates optimal environmental conditions for aquatic organisms, enabling year-round high-density, high-efficiency, and healthy production, and represents a pivotal direction for the future of aquaculture.
Design Workflow
The design of Recirculating Aquaculture System (RAS) water treatment processes is based on material balance principles, with the core objective of rapidly removing harmful substances (e.g., suspended solids, ammonia nitrogen). Balance equations for these pollutants are established to derive system parameters, which are then refined using engineering practical experience to enhance model reliability.
Key design parameters depend on: Cultured species and Maximum Biomass Carrying Capacity ( Biomass Carrying Capacity=Density×Effective Water Volume ) From this, daily feed input and total waste (solid particles, ammonia nitrogen) are calculated. These values determine equipment specifications (e.g., biofilter size, bio-media volume, microscreen filter capacity).
Step-by-Step Workflow
Step 1: Determine Aquaculture Water Volume
The water volume should be determined based on land availability, financial capacity, and operational scalability.
Step 2: Select Aquaculture Species
Species selection must consider: Water quality compatibility, Farming complexity, Growth cycle, Market demand, Economic viability.
Step 3: Define Stocking Density & Maximum Daily Feed Input
Calculate a reasonable breeding density based on the selected breeding species and the size of the breeding water body, and use this to calculate the maximum daily feeding amount.
Step 4: Quantify Maximum Waste Production
The core of the design of industrialized circulating water treatment process is how to quickly remove the breeding waste generated after feeding. In other words, before feeding, all water indicators in the aquaculture pond are balanced and meet the standards. But after injecting a large amount of feed, the balance of the breeding pond will be disrupted, and a large amount of solid, liquid, and gaseous waste will be generated.
Step 5: Design Water Treatment Equipment
Calculate the performance parameters of water treatment equipment based on the maximum total amount of waste.
Reference Process Parameters
| Reference Process Parameters | |
| Maximum number of cycles for the circulating water system | 24 cycles/day |
Breeding density | Seawater (e.g., Grouper): ≥50 kg/m³ Freshwater (e.g., Bass): ≥50 kg/m³ |
Utilization rate of aquaculture water in the circulating water system | ≥90% |
Water exchange rate | ≤10% |
| UV sterilization rate | ≥99.9% |
Special Operational Modes
In addition to the normal aquaculture mode, the following normal factors should also be considered during the process of Recirculating Aquaculture System (RAS) System (RAS).
1. Power outage emergency mode
Power outages during the aquaculture process can cause fatal losses to the circulating water aquaculture system, so it is necessary to have a power outage emergency mode in the design to prevent power outages from occurring.
1) Install backup generator: Quickly start the generator in case of power outage to ensure the normal operation of the circulating water system.
2) Design overflow pipeline: When the circulating pump is powered off and not working, the overflow pipeline can promptly drain the water in the pump pool to prevent water from overflowing the pump pool.
3) Equipped with emergency oxygenation: farmed animals may die quickly under low dissolved oxygen conditions. The liquid oxygen system does not rely on electricity and can continuously supply oxygen to the breeding pool in the event of a power outage, ensuring the short-term health of the breeding animals.
Disinfection Mode
Relying solely on physical sterilization to disinfect the water is not enough if the breeding animals develop diseases during the breeding process. At this time, some chemicals may be used for disinfection and sterilization. The residue of chemical drugs is likely to enter the biochemical filter through water circulation. The nitrifying bacteria in the biochemical filter are very fragile. The influx of chemicals is likely to kill nitrifying bacteria on a large scale. Therefore, when designing a Recirculating Aquaculture System (RAS) system, there must be a separate disinfection mode. When chemical disinfection is required, ensure that the circulating water does not flow through the biochemical filter.
Idle Mode
In humid environments, metal components of valves (such as valve stems, valve cores, etc.) are prone to chemical reactions with oxygen and moisture in the air, resulting in rust formation. During the breeding process, valves often rotate, and rust is removed by friction between components. However, long-term maintenance will accumulate a large amount of rust between valve components, increase the friction between valve components, and make it difficult for the valve to rotate or even open. In view of this, in the maintenance mode, all valves will be opened once a day to avoid valve failures caused by prolonged disuse.
Given the above special mode, if it is considered that the operation is relatively complex, it will cause unnecessary losses if workers make mistakes. Bang Bang has launched a smart control system for circulating water, which can switch between different operating modes according to different scenarios.
About WOLIZE
About WOLIZE
In fish farming production, feed cost is the largest part of the whole cost, basically accounting for about 60% to 70%. Therefore, saving feed cost is also a way to improve farming efficiency, but it must be based on reasonable and scientific methods. .
1. Choose feed with reasonable and balanced nutrients
The quality of the feed is directly related to the cost of breeding. If the quality of the feed is good, the digestible and absorbable part of the fish after eating is high, the growth rate of the fish is fast, and the feed coefficient is low. Conversely, raising fish with poor-quality feed will greatly increase the cost of farming.
2. Scientific and reasonable feeding is an effective way to reduce feed waste and control feed cost
Feeding should be based on the principles of "four determinations" timing, fixed point, qualitative and quantitative, so as to achieve a uniform and appropriate amount, and avoid sudden more and less, resulting in oversatisfaction, hunger, indigestion, and affecting the normal digestion and absorption of fish.
The feeding amount should be determined according to water quality, weather, fish activity and feeding status.
In terms of feeding amount, the fish are generally controlled to eat "80% full", that is, 80% of the fish are full, and 20% of the fish are not very full; after 2 hours of feeding, the feed is basically eaten, and there is a little leftover, or There are also a few schools of fish swimming around in search of food. This maintains the fish school's appetite and reduces feed loss.
Reasonable determination of feeding times should be determined according to the feeding habits, growth status and feeding strength of fish. Reasonable feeding amount and frequency are beneficial to improve the digestibility of fish to feed, reduce the loss of feed in water, and reduce the feed coefficient.
Properly grasp the feeding time and choose the feeding place. The feed table should be placed on the leeward side of the pond where the water is deeper, the bottom is harder, less leakage, and more open.
The time and frequency of feeding are determined according to the species of fish, feeding habits and size.
Generally, adult fish are fed twice in the morning and evening, preferably at 8-9 o'clock in the morning and 5-6 o'clock in the afternoon.
3. Healthy water quality management
Water quality management is very important, as the saying goes: 'Three minutes of species, seven minutes of management. ’ Pipe refers to water quality management. Pond water quality conditions have an important impact on fish feed coefficient.
Generally speaking, in water bodies with no pollution, fresh water, and sufficient dissolved oxygen, fish have a large food intake, strong appetite, high feed utilization rate, fast growth rate, and small feed coefficient.
Among the various physical and chemical factors of pond water quality, the amount of dissolved oxygen in the water body is the biggest factor affecting the feed. If the dissolved oxygen in the water body is sufficient, the growth and metabolism of the fish body will be vigorous, the digestion time for the feed will be greatly shortened, and the growth rate index of the fish will increase. coefficient is negative.
According to experiments by aquaculture experts, when the dissolved oxygen in water drops from 7.6 mg/ton to 3.1 mg/ton, the feed factor increases by 5.6 times, while the growth rate decreases by 9 to 10 times.
In addition, within a certain water temperature range, the consumption of fish feed is directly proportional to the increase in water temperature. Within a certain range of water temperature, for every 1°C increase, the feeding rate of fish with the same body weight will increase by 0.1% to 0.5%.
Therefore, the same fish size has different feeding rates at different water temperatures.
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