Custom Indoor Ras Technology Aquaculture Water Recirculation System In Aquaculture

Introduction to the RAS System for Industrial Indoor Mud Crab Farming

The RAS (Recirculating Aquaculture System) for industrial indoor mud crab farming is a modern farming mode based on a high-density and controllable environment.

Through recirculating water treatment technology, and in combination with biological, mechanical, and electronic devices, this system simulates the natural growth environment of mud crabs. It achieves water quality purification, temperature regulation, and disease prevention and control, thus getting rid of the traditional farming's dependence on natural water bodies and seasons. In mud crab farming, three-dimensional facilities such as "crab apartments" are often used. The crabs are individually placed in independent farming boxes to avoid cannibalism. At the same time, the recirculating water system enables the efficient utilization of resources.

Components of RAS

Advantages of RAS

Information About Indusrial RAS Crab Growing

1.Average Harvest Weight
Conventional Range: The harvest weight of mud crabs farmed in indoor crab apartments is usually 200-500 grams per crab, which specifically depends on the initial specifications of the crab seedlings and the farming management.
If summer seedlings (15-50 grams per crab) are stocked, they can reach the commercial specifications (about 200-300 grams) after 3-4 months of farming.
If larger-sized crab breeds (such as 50-100 grams per crab) are stocked, the farming cycle is shortened, and the harvest weight can reach more than 300 grams.
During the fattening farming stage (for the mated thin crabs), they can gain weight to reach the specifications of roe crabs (about more than 150-200 grams) within 30-40 days.

2.Farming Cycle
Full Cycle: If starting from crab seedlings (such as C4 stage juvenile crabs), through optimizing water quality, temperature, and feed management in the indoor crab apartments, the farming cycle which is 12-18 months in traditional earthen ponds can be shortened to 6-8 months.
Specific Stages:
Seedling Cultivation: When stocking 15-50 grams of crab seedlings, they can reach the commercial specifications within 3-4 months.
Fattening Stage: For thin crabs or female crabs after mating, it only takes 30-40 days to gain weight to meet the standards of roe crabs.

3.Key Influencing Factors
Temperature Control: The indoor system can maintain the water temperature at 18-25°C (the most suitable growth temperature for mud crabs), avoiding winter dormancy and shortening the growth stagnation period.
Water Quality Management: The crab apartments adopt recirculating water technology, combined with equipment such as protein skimmers and biological filters, to keep the water quality stable (salinity 8-26, pH 7.8-8.5), reducing the occurrence of diseases and the frequency of water changes, and improving the growth efficiency.
Precise Feeding: Using soft pellet feeds or shellfish baits, the daily feeding amount accounts for 8-10% of the body weight. Combined with AI monitoring to reduce the waste of uneaten feeds, the feed conversion rate is improved (low FCR design).
4.Comparative Advantages over Traditional Farming
Shorter Cycle: Traditional earthen pond farming requires 12-18 months (including the overwintering period), while the crab apartments can shorten it to 6-8 months through environmental regulation.
Increased Density: The crab apartments adopt a modular independent box design, and the farming density can reach 4-6 crabs per square meter (in traditional ponds, it is 1-2 crabs per square meter), significantly increasing the yield per unit area.
Optimized Survival Rate: Closed management reduces the risks of enemy organisms (such as gobies) and escapes. With the biosecurity isolation design, the survival rate can be increased to more than 80%.

Technical Specifications

Some Photos of Crab Box

FAQ:

Q: Are you a factory or a trading company?
A: We are a manufacturer with a factory covering an area of 2,000 square meters and various production equipments.

Q: What is the material of the main structure of your greenhouse? How long can it be guaranteed to be used?
A: The main frame of our greenhouse is generally made of hot-dip galvanized steel. This material has super corrosion resistance. Under normal circumstances, with proper daily maintenance, its service life can reach 15 - 20 years. It can resist common natural disasters such as wind, rain, and snow pressure, providing a stable growing environment for the crops in the greenhouse.

Q: Before placing a large order, we'd like to buy a sample greenhouse to try it out first. Is that possible?
A: Yes. We can send you a small-scale greenhouse by LCL (Less than Container Load) sea shipping.

Q: I have a piece of land and I want to grow some vegetables or raise some fish, but I don't know what kind of greenhouse and what size I need. Can you help me with the design?
A: Of course. You can tell us the size of your land, your expected annual output of vegetables or fish, as well as the local climate information. Based on these data, we can design the style, size and price of the greenhouse for you. We'll also let you know approximately how many workers are needed and how long it will take to complete the installation, and how much yield you can expect in a year.

Q: Do you provide planting technical guidance after I purchase the greenhouse?
A: We have a professional planting technology team. After you purchase the greenhouse, according to the crop varieties you plant, we will customize a detailed planting plan for you, covering all aspects such as sowing time, planting density, fertilization and watering frequency, and key points of pest and disease prevention and control. During the planting process, you can contact our technicians via phone, video, etc. at any time, and they will answer your questions promptly.

Q: How long will it take to receive the greenhouse after placing an order?
A: Generally, for standard-specification greenhouses, production, transportation, installation and commissioning can be completed within 20 - 30 days after you place the order and the deposit arrives. However, if you customize special specifications or configurations, or the quantity you purchase is relatively large, it may take about 40 - 60 days. We will give you an accurate time estimate when signing the contract.

Q: What kind of assistance can you provide during the greenhouse installation?
A: We will provide several ways to help you with the installation: First, we'll provide written installation instructions; second, we'll offer online installation guidance; third, we'll dispatch engineers to your construction site for on-site installation guidance; fourth, if there is our local agent, our agent can also help you with the installation service.

Q: What are the quick solutions when encountering pest and disease problems?
A: First, our technical team will help you accurately identify the types of pests and diseases, which is the key to taking the right countermeasures. Then, according to different pests and diseases, we will provide corresponding biological control, physical control or chemical control solutions. For example, for common pests like aphids, we recommend using physical control methods such as yellow sticky traps combined with biological control methods like releasing ladybugs, so as to minimize the use of chemical pesticides, which can protect the environment while effectively controlling pests and diseases.

Q: What preparations should I make before installation?
A: First, obtain the building permit from the government if required. Second, prepare the tools according to the tool list we send you. Third, get the workers ready. Fourth, prepare the power supply if needed. Fifth, prepare a place to store the goods upon arrival to keep them from getting wet in the rain.

Q: What does your greenhouse after-sales service include?
A: We provide a one-year free warranty service. During the warranty period, for any parts of the greenhouse with non-artificial damage or quality problems caused by natural disasters, we will replace or repair them for free. After one year, we still offer long-term paid maintenance services.

IGreen has been dedicated to the research, development, and production of modern agricultural systems, including greenhouse facilities, hydroponics systems, recirculating aquaculture systems (RAS), and aquaponics systems. Now we are a provider of one-stop solutions for agricultural planting, aquaculture, and biological cultivation. 

With our experience and professional knowledge, our company vigorously develops ecological agriculture, practices the concept of "Three-Matter Cycle", constructs a green agriculture with a cycle of plants, animals, and microbe, and is committed to providing customers with comprehensive high-quality services.

In the realm of greenhouse technology, we offer a diverse range of greenhouse models meticulously designed to meet the specific climatic requirements of various regions.

For tropical climates, our fixed roof vent greenhouses provide optimal ventilation and temperature control. In desert regions, the innovative half-moon shaped greenhouses are engineered to withstand harsh desert conditions, while our polycarbonate sheet greenhouses are ideal for cold climates, ensuring efficient heat retention and insulation. Additionally, we provide a comprehensive selection of optional accessory systems that can be integrated with our greenhouses to enhance their functionality and productivity. 

Our hydroponics systems are designed with precision, catering to the cultivation needs of both leafy vegetables such as lettuce and fruiting vegetables like tomatoes, cucumbers, strawberries, and peppers. These systems utilize advanced nutrient delivery mechanisms and environmental control technologies to ensure maximum yields and superior quality produce. 

In the RAS domain, we offer a wide array of capacity head sets, capable of handling water volumes ranging from 10 cubic meters to 10,000 cubic meters. Our RAS are specifically designed for the efficient cultivation of popular aquaculture species such as tilapia, catfish, and shrimp, providing a sustainable and high-yield solution for the aquaculture industry. 

The aquaponics systems developed by IGreen represent a harmonious integration of aquaculture and hydroponics. The nutrient-rich water from the fish ponds is recycled and utilized for vegetable cultivation, and after a sterilization process, it is returned to the fish ponds, creating a closed-loop, organic, and pesticide-free ecosystem.

IGreen is proud to possess a highly skilled and innovative technical team, specializing in product design and development. Over the years, we have successfully installed thousands of greenhouse systems in more than 50 countries worldwide. These installations are widely utilized in vegetable and flower cultivation, seedling production, poultry and fungus breeding, and various other agricultural applications, contributing significantly to the growth and success of the global agricultural community. 

We are committed to forging strong partnerships with our clients and look forward to collaborating with you. Our goal is to provide you with the most advanced and reliable agricultural systems, enabling you to achieve the highest standards in vegetable and fishery production, and together, we can pioneer a sustainable and prosperous future in modern agriculture.