In aquaculture, the quality of raw water is directly related to the health and growth of aquaculture organisms, and then affects the efficiency of aquaculture.
Therefore, raw water pretreatment has become an indispensable part of the breeding process.
This article will give you a detailed introduction to the importance of raw water pretreatment for aquaculture and its conventional processes to help you better understand and apply this technology.
First, the importance of raw water pretreatment
The pretreatment of aquaculture raw water is of great significance to maintain the stability of water quality, reduce the occurrence of diseases and improve the efficiency of aquaculture. Through effective raw water treatment technology, the pollutant content in the water body can be reduced, the water quality condition can be improved, and the aquaculture organisms can grow in a healthy and safe environment. This not only helps to improve the survival rate of aquaculture, but also improves the quality and yield of aquaculture products.
Second, the conventional process of raw water pretreatment
For different raw water quality, we need to develop a process plan according to the needs of aquaculture after testing the water quality. Conventional raw water treatment processes are as follows: filtration - disinfection - precipitation - aeration.
The following we focus on the filtration process, the common filtration are sand cylinder filtration and ultrafiltration:
Sand tank filtration
Sand tank filtration is a technology that uses special filter sand to remove small dirt in water.
Its principle is simple and easy to understand, through the filtering effect of filter sand, impurities in water can be effectively removed and water quality can be purified.
Sand tank filtration has the advantages of high filtration precision, good effluent quality, high flow rate, fast cleaning, no loss of filter material and easy operation and maintenance, and is one of the common pretreatment methods in aquaculture.
Ultrafiltration technique
Ultrafiltration technology is a kind of technology that uses microporous membrane to filter and separate liquid.
It can effectively remove dissolved inorganic salts, organic substances, colloidal substances and bacteria and other microorganisms in water.
Ultrafiltration membrane is widely used in high density circulating water fish culture system. It can efficiently remove impurities in water, ensure clean water quality, thereby reducing the occurrence of diseases and improving the efficiency of aquaculture.
The advantages and disadvantages of ultrafiltration are obvious.
Advantages, ultrafiltration membrane can efficiently remove impurities, ensure water quality safety, and energy saving and environmental protection; Most Marine life can be farmed in the water treated by ultrafiltration membranes.
However, the disadvantages can not be ignored, such as high maintenance costs, the need to regularly replace and maintain ultrafiltration membranes, increasing operating costs; High technical requirements require professional personnel to operate and maintain.
Conclusion
In this paper, we introduce the filtration process of aquaculture raw water pretreatment in detail. In the following articles, we will continue to cover the disinfection and aeration steps of raw water pretreatment, so stay tuned.