Recirculating Aquaculture System Design Trend Report
In the production of recirculating aquaculture system design, Shandong Wolize Biotechnology Co., Ltd. has embraced the challenge of being a qualified manufacturer. We have purchased and secured a wide range of raw materials for the product. In the selection of suppliers, we take the comprehensive corporate competence into consideration, including the ability to make a continuous effort to improve their materials and the level of technology.
WOLIZE is the renowned brand in both domestic and foreign markets. Through in-deep market exploration on products, we collect a variety of information about market demand. According to the data, we develop different products fitting to specific demand. In this way, we are about to tap into the global market targeting specific customer group.
We will strive to provide customers with something worthful through every service and product including recirculating aquaculture system design, and help customers perceive WOLIZE as progressive, refined and engaging platform providing values.
no data
The filtering drum in the recirculating aquaculture system is an important water treatment equipment, and its main function is to remove suspended solids in the water, including feed residues, fish feces, and biological bacterial masses. There are two main types of filtering drums: drum type and crawler type.
Drum filtering drum:
Filtration is performed using a rotating stainless steel drum with a dense 316L stainless steel screen attached to it, which is driven by a motor through gears.
Crawler type filtering drum:
By controlling the mesh size of the filter cloth, suspended particles with a diameter larger than the corresponding specification can be effectively removed from the water. By filtering on one side, with a built-in backwash device, and then by designing multiple sewage tanks and sewage outlets, secondary pollution can be effectively avoided.
After years of practice, rotary drum filtering drum has gradually become the mainstream of factory-scale recirculating aquaculture due to its compact structure, small footprint, good filtration effect, low operating cost and easy maintenance.
The structure and working principle of rotary drum filtering drum
The rotary drum filtering drum uses a rotating drum to filter. The outside of the drum is covered with a dense mesh and driven by a motor. A pump is installed outside the filtering drum. The filtered clean water is pumped away by the pump, while the dirt is left on the mesh and washed away by back washing.
1. The basic structure of the rotary drum filtering drum
The drum filtering drum is mainly composed of a horizontal drum, a filter screen, a driving device, a water inlet system, a water outlet system, a sewage system, a backwash system, and a control cabinet.
1. Roller:
This is the core component of the rotary drum filtering drum. It is generally a horizontally placed cylindrical structure consisting of a metal frame with a supporting mesh and a working mesh woven from stainless steel wire wrapped around the outside. The mesh size is usually between 60-250 meshes. Different mesh specifications can be selected according to actual needs to achieve the corresponding filtering accuracy.
2. Driving device:
It is composed of a motor and gears. The motor drives the drum to rotate through the gears. The general speed is 1-3r/min. Too fast a speed may cause large particles to break into tiny particles and pass through the filter, reducing the filtering effect.
3. Water inlet system:
It includes water inlet pipe and overflow weir water distributor, etc. The water inlet pipe introduces the aquaculture wastewater to be filtered into the filtering drum machine. After the wastewater enters the overflow weir water distributor, it can be evenly distributed on the filter cartridge filter screen rotating in the opposite direction after a short period of steady flow, so as to achieve better filtering effect.
4. Water outlet system:
It is mainly the water outlet pipe. The clean water filtered by the filter is discharged from the filtering drum machine through the water outlet pipe and enters the next water treatment link.
5. Sewage system:
It consists of a sewage collection tank and a sewage discharge pipe. The solid dirt intercepted by the filter screen will be collected in the sewage collection tank during the rotation of the drum, and then discharged from the filtering drum through the sewage discharge pipe.
6. Backwash system:
It consists of a back washing water pump, a back washing pressure nozzle, a liquid level sensor, a back washing pipe, etc. When the filter is clogged to a certain extent, the water level controller senses the water level change, starts the back washing water pump, and high-pressure water rushes to the filter through the nozzle, flushing the dirt attached to the filter into the sewage collection tank, thereby realizing automatic cleaning of the filter and ensuring the filtering effect.
7. Control chassis:
The control box is the brain of the filtering drum machine. The traditional control box can only perform localized control, and the parameter settings are complicated and inconvenient to operate. When the equipment fails, there is no telephone remote alarm system, which increases the risk of breeding. With the rapid development of the Internet of Things and sensor technology, intelligent filtering drum machines have appeared on the market. For example, the intelligent filtering drum machine launched by wolize can not only monitor the operation of the filtering drum machine in real time through a mobile phone, but also detect faults such as filter blockage, filter damage or back washing abnormalities in time through the use of a variety of sensors. After the fault is discovered, the relevant personnel can be informed by telephone alarm, which greatly reduces the failure rate of the filtering drum machine and reduces the risk of breeding.
2. Working principle of rotary drum filtering drum:
The working principle of the filtering drum mainly consists of two parts: filtration and back washing:
1. Filter:
The sewage enters the equipment through the feed port of the filtering drum and passes through the microporous surface of the filter. The commonly used micropore size is usually around 200 meshes, which can effectively intercept suspended solid particles and colloidal particles.
2. Anti-cleaning:
As the filtration time increases, the surface of the microporous filter membrane will gradually be blocked by solid particles and colloidal particles, reducing the filtration efficiency. In order to maintain the normal operation of the filtering drum machine, the microporous filter membrane needs to be cleaned, and the cleaning process is usually carried out by back washing.
Drum filtering drum:
Filtration is performed using a rotating stainless steel drum with a dense 316L stainless steel screen attached to it, which is driven by a motor through gears.
Crawler type filtering drum:
By controlling the mesh size of the filter cloth, suspended particles with a diameter larger than the corresponding specification can be effectively removed from the water. By filtering on one side, with a built-in backwash device, and then by designing multiple sewage tanks and sewage outlets, secondary pollution can be effectively avoided.
After years of practice, rotary drum filtering drum has gradually become the mainstream of factory-scale recirculating aquaculture due to its compact structure, small footprint, good filtration effect, low operating cost and easy maintenance.
The structure and working principle of rotary drum filtering drum
The rotary drum filtering drum uses a rotating drum to filter. The outside of the drum is covered with a dense mesh and driven by a motor. A pump is installed outside the filtering drum. The filtered clean water is pumped away by the pump, while the dirt is left on the mesh and washed away by back washing.
1. The basic structure of the rotary drum filtering drum
The drum filtering drum is mainly composed of a horizontal drum, a filter screen, a driving device, a water inlet system, a water outlet system, a sewage system, a backwash system, and a control cabinet.
1. Roller:
This is the core component of the rotary drum filtering drum. It is generally a horizontally placed cylindrical structure consisting of a metal frame with a supporting mesh and a working mesh woven from stainless steel wire wrapped around the outside. The mesh size is usually between 60-250 meshes. Different mesh specifications can be selected according to actual needs to achieve the corresponding filtering accuracy.
2. Driving device:
It is composed of a motor and gears. The motor drives the drum to rotate through the gears. The general speed is 1-3r/min. Too fast a speed may cause large particles to break into tiny particles and pass through the filter, reducing the filtering effect.
3. Water inlet system:
It includes water inlet pipe and overflow weir water distributor, etc. The water inlet pipe introduces the aquaculture wastewater to be filtered into the filtering drum machine. After the wastewater enters the overflow weir water distributor, it can be evenly distributed on the filter cartridge filter screen rotating in the opposite direction after a short period of steady flow, so as to achieve better filtering effect.
4. Water outlet system:
It is mainly the water outlet pipe. The clean water filtered by the filter is discharged from the filtering drum machine through the water outlet pipe and enters the next water treatment link.
5. Sewage system:
It consists of a sewage collection tank and a sewage discharge pipe. The solid dirt intercepted by the filter screen will be collected in the sewage collection tank during the rotation of the drum, and then discharged from the filtering drum through the sewage discharge pipe.
6. Backwash system:
It consists of a back washing water pump, a back washing pressure nozzle, a liquid level sensor, a back washing pipe, etc. When the filter is clogged to a certain extent, the water level controller senses the water level change, starts the back washing water pump, and high-pressure water rushes to the filter through the nozzle, flushing the dirt attached to the filter into the sewage collection tank, thereby realizing automatic cleaning of the filter and ensuring the filtering effect.
7. Control chassis:
The control box is the brain of the filtering drum machine. The traditional control box can only perform localized control, and the parameter settings are complicated and inconvenient to operate. When the equipment fails, there is no telephone remote alarm system, which increases the risk of breeding. With the rapid development of the Internet of Things and sensor technology, intelligent filtering drum machines have appeared on the market. For example, the intelligent filtering drum machine launched by wolize can not only monitor the operation of the filtering drum machine in real time through a mobile phone, but also detect faults such as filter blockage, filter damage or back washing abnormalities in time through the use of a variety of sensors. After the fault is discovered, the relevant personnel can be informed by telephone alarm, which greatly reduces the failure rate of the filtering drum machine and reduces the risk of breeding.
2. Working principle of rotary drum filtering drum:
The working principle of the filtering drum mainly consists of two parts: filtration and back washing:
1. Filter:
The sewage enters the equipment through the feed port of the filtering drum and passes through the microporous surface of the filter. The commonly used micropore size is usually around 200 meshes, which can effectively intercept suspended solid particles and colloidal particles.
2. Anti-cleaning:
As the filtration time increases, the surface of the microporous filter membrane will gradually be blocked by solid particles and colloidal particles, reducing the filtration efficiency. In order to maintain the normal operation of the filtering drum machine, the microporous filter membrane needs to be cleaned, and the cleaning process is usually carried out by back washing.
1. Turbidity:
Turbidity is an important indicator to measure the amount of suspended particles in water. It can be detected using a turbidity meter. Generally speaking, the turbidity of water should be significantly reduced after being filtered through a filtering drum machine. For example, in unfiltered recirculating aquaculture water, the turbidity may reach tens or even hundreds of NTU (Nephelometric turbidity units), while after effective filtration, the turbidity should ideally be reduced to below 10 NTU. In some aquaculture scenarios with extremely high requirements for water quality, such as precious ornamental fish farming or fish fry cultivation, the turbidity after filtration may need to be controlled at 1 - 5 NTU.
2. Suspended solids content (TTS):
The content of suspended solids in the water is monitored in real time through online sensors. Before filtering, the aquaculture water is sampled and the content of suspended solids is measured, usually in mg/L. After filtering by a filtering drum, the sample is tested again. An effective filtering drum should be able to remove most of the suspended solids. For example, the suspended solids content of the water body with a content of 100 mg/L before filtering should be reduced to about 10 mg/L after filtering by a filtering drum. The specific reduction degree also depends on the filtering accuracy of the filtering drum and the characteristics of the suspended solids in the water body.
3. Filter inspection
After the filtering drum has been running for a while, turn off the device and check the filter. If a layer of impurities is evenly adsorbed on the surface of the filter and no large particles of impurities penetrate, this indicates that the filtration effect is good. On the contrary, if there are many large particles of impurities that have not been filtered on the filter, or there are obvious holes that allow impurities to pass directly, it means that the filtration effect is not good. For example, during the inspection, it is found that a large amount of feed particles, fish feces and other substances that should be filtered remain on the filter instead of being intercepted outside the filter. This is a normal phenomenon; but if a large amount of impurities similar in size to fish feces are found to pass through the filter into the water outlet, there may be a problem with the filter.
Perform integrity tests on the filter regularly. You can use pressure tests or bubble tests. In a pressure test, a certain pressure of gas or liquid is applied to one side of the filter to see if there is any leakage on the other side. A bubble test is to immerse the filter in water, pass gas from one side, and see if there are any bubbles coming out from the other side. If a leak is found, it means that the filter is damaged, which will affect the filtering effect.
4. Compare the appearance and smell of the inlet and outlet water
Appearance:
Carefully observe the appearance of the incoming and outgoing water. If the incoming water is turbid, has color (such as green due to more algae) or has visible impurities floating on it, the outgoing water should become clear and transparent after being filtered by the filtering drum. For example, if the incoming water looks turbid like muddy water, after being filtered by the filtering drum, the water should become clear and you can clearly see the bottom of the water or the inside of the equipment.
odor:
Some aquaculture water contains a lot of odors caused by the decomposition of organic matter, such as fishy smell, rancid smell, etc. After effective filtration by the filtering drum, the odor should be reduced. This is because the filtering drum removes some of the organic matter that produces odors, such as uneaten feed residues and fish excrement. For example, in a recirculating aquaculture system, the incoming water has a distinct fishy smell. After filtering by the filtering drum, if the smell is significantly reduced, this also indicates that the filtration effect is good to a certain extent.
Turbidity is an important indicator to measure the amount of suspended particles in water. It can be detected using a turbidity meter. Generally speaking, the turbidity of water should be significantly reduced after being filtered through a filtering drum machine. For example, in unfiltered recirculating aquaculture water, the turbidity may reach tens or even hundreds of NTU (Nephelometric turbidity units), while after effective filtration, the turbidity should ideally be reduced to below 10 NTU. In some aquaculture scenarios with extremely high requirements for water quality, such as precious ornamental fish farming or fish fry cultivation, the turbidity after filtration may need to be controlled at 1 - 5 NTU.
2. Suspended solids content (TTS):
The content of suspended solids in the water is monitored in real time through online sensors. Before filtering, the aquaculture water is sampled and the content of suspended solids is measured, usually in mg/L. After filtering by a filtering drum, the sample is tested again. An effective filtering drum should be able to remove most of the suspended solids. For example, the suspended solids content of the water body with a content of 100 mg/L before filtering should be reduced to about 10 mg/L after filtering by a filtering drum. The specific reduction degree also depends on the filtering accuracy of the filtering drum and the characteristics of the suspended solids in the water body.
3. Filter inspection
After the filtering drum has been running for a while, turn off the device and check the filter. If a layer of impurities is evenly adsorbed on the surface of the filter and no large particles of impurities penetrate, this indicates that the filtration effect is good. On the contrary, if there are many large particles of impurities that have not been filtered on the filter, or there are obvious holes that allow impurities to pass directly, it means that the filtration effect is not good. For example, during the inspection, it is found that a large amount of feed particles, fish feces and other substances that should be filtered remain on the filter instead of being intercepted outside the filter. This is a normal phenomenon; but if a large amount of impurities similar in size to fish feces are found to pass through the filter into the water outlet, there may be a problem with the filter.
Perform integrity tests on the filter regularly. You can use pressure tests or bubble tests. In a pressure test, a certain pressure of gas or liquid is applied to one side of the filter to see if there is any leakage on the other side. A bubble test is to immerse the filter in water, pass gas from one side, and see if there are any bubbles coming out from the other side. If a leak is found, it means that the filter is damaged, which will affect the filtering effect.
4. Compare the appearance and smell of the inlet and outlet water
Appearance:
Carefully observe the appearance of the incoming and outgoing water. If the incoming water is turbid, has color (such as green due to more algae) or has visible impurities floating on it, the outgoing water should become clear and transparent after being filtered by the filtering drum. For example, if the incoming water looks turbid like muddy water, after being filtered by the filtering drum, the water should become clear and you can clearly see the bottom of the water or the inside of the equipment.
odor:
Some aquaculture water contains a lot of odors caused by the decomposition of organic matter, such as fishy smell, rancid smell, etc. After effective filtration by the filtering drum, the odor should be reduced. This is because the filtering drum removes some of the organic matter that produces odors, such as uneaten feed residues and fish excrement. For example, in a recirculating aquaculture system, the incoming water has a distinct fishy smell. After filtering by the filtering drum, if the smell is significantly reduced, this also indicates that the filtration effect is good to a certain extent.
Recirculating Aquaculture System (RAS) circulating water technology is a technology that can change aquaculture in open water bodies into controlled environment farming. This technology can continuously renew the water body and has unique technical advantages. When using RAS technology to breed aquatic products, it is necessary to start from the hydrological conditions of the breeding site and make different adaptive designs in each link of the system.
First of all, circulating water technology can turn the uncontrollable breeding environment into controllable, basically eliminating the influence of external factors (such as harmful bacteria, viruses, pesticide residues in the soil, excessive heavy metals, etc.) on organisms. In the process of recirculating aquaculture, not only do not need to add any antibiotics, but also add various beneficial bacteria to help the fish intestines restore health, so that the produced aquatic products are truly healthier and pollution-free.
Secondly, the circulating water plant is different from the traditional soil pond culture, it can be built on any land for agricultural facilities or industrial land. Circulating water plants can be built around super cities, such as Chongming Island in Shanghai, Shenshan Cooperation Zone in Shenzhen, and Development Zone in Chengdu. Therefore, circulating water technology can to a certain extent solve the problems of loss, cold chain, and water truck logistics costs caused by the logistics and transportation of production and sales during aquaculture. However, considering the actual cost of water for aquaculture, the factory needs to be located in an area close enough to the water source to optimize the cost structure.
Finally, recirculating aquaculture technology can meet the needs of agricultural orders, and can plan production in advance according to species and quantity. In the production process, it is possible to use AI image recognition (to assist in the inventory of biological assets), automatic feeding machines (to save labor costs), and automatic fish screening/separation devices (to reduce external disturbance of biological growth and reduce mortality), which has the advantages of Many advantages. For fresh food e-commerce companies such as Hema and Dingdong, the quality control of aquatic products has always been their biggest pain point, and the circulating water technology is exactly what makes the production process fully transparent, real-time inventory, and predictive breeding The cycle can help downstream fresh food e-commerce companies to provide consumers with a stable and healthy supply of goods.
no data
you might like
no data
Contact us
we welcome custom designs and ideas and is able to cater to the specific requirements. for more information, please visit the website or contact us directly with questions or inquiries.
Based in the core area of China's aquaculture industry, driven by scientific and technological innovation, the company is committed to providing efficient, ecological and sustainable intelligent aquaculture solutions to global customers, helping the aquaculture industry to improve quality, efficiency and green development.
QUICK LINKS
PRODUCTS
CONTACT US
Email: changdongwang@wolize.com
Tel.: +86 17864390557
Tel.: +86 17864390557
WhatsApp: +86 17864390557
Add: Room 1407, Zhongde Business Building, No. 222 Renmin West Road, Zhangdian District, Zibo City, Shandong Province, China
Copyright © 2025 Wolize | Sitemap | Privacy Policy