Technical communication
Aquacultural water quality testing is more or less normal
Recirculating aquaculture is an efficient, energy-saving and environmentally friendly aquaculture method, which can effectively save water resources and reduce aquaculture wastewater discharge, so as to achieve the purpose of improving aquaculture efficiency and protecting the environment. In recirculating aquaculture, the quality of water directly affects the efficiency of aquaculture and animal health, so on the recirculating water
Detection and management are critical. So, circulating aquaculture water quality test how much is normal? What are the indicators that need to be tested? Here we will introduce it in detail.
First, circulating aquaculture water quality test how much is normal?
1. pH value
pH value is a measure of acidity and alkalinity of water, and for recirculating aquaculture, the normal range of pH value should be between 6.5 and 8.5. When the pH value is too high or too low, it will affect the growth and metabolism of microorganisms, and then affect the stability of water quality and animal health. Therefore, in the recirculating aquaculture, needest the pH value regularly and adjust it in time.
2. Dissolved oxygen
Dissolved oxygen is a measure of the amount of oxygen in the water body, and for recirculating aquaculture, the normal range of dissolved oxygen should be between 5 and 8mg/L. When the dissolved oxygen is lower than 5mg/L, it will lead to anoxia in the water body, which will affect the growth and metabolism of microorganisms, as well as the respiration and health of animals. So, In recirculating aquaculture, it is necessary to measure dissolved oxygen regularly and oxygenate in time.
3: Temperature
Temperature is a measure of the temperature of the water body. For recirculating aquaculture, the normal range of temperature should be between 20 and 30℃. When the water temperature is too high or too low, it will affect the growth and metabolism of microorganisms, and then affect the stability of water quality and animal health. Therefore, in the recirculating aquaculture, it is necessary to determine Phase test water temperature, and timely adjustment.
4. Ammonia, nitrite and nitrate
Ammonia nitrogen, nitrite and nitrate are indicators to measure nitrogen content in water, and the normal range of them should be 0.1~0.5mg/L, 0~0.2mg/L and 0~10mg/L, respectively, for circulating aquaculture. When these indicators exceed the normal range, it will lead to the deterioration of water quality and affect the growth of microorganisms Growth and metabolism, which in turn affect the health of animals. Therefore, when conducting recirculating aquaculture, these indicators need to be tested regularly and adjusted in time.
5. Total phosphorus and total nitrogen
Total phosphorus and total nitrogen are measures of phosphorus and nitrogen content in water, and for recirculating aquaculture, their normal ranges should be between 0 and 0.2mg/L and 0 and 2mg/L respectively. When these indicators exceed the normal range, it will lead to the deterioration of water quality, affect the growth and metabolism of microorganisms, and then affect the animal's Health. Therefore, when conducting recirculating aquaculture, these indicators need to be tested regularly and adjusted in time.
Two, which indicators need to be tested?
As mentioned above, indicators to be tested in circulating aquaculture include pH, dissolved oxygen, temperature, ammonia nitrogen, nitrite, nitrate, total phosphorus, and total nitrogen. These indicators reflect the acidity and alkalinity, oxygen content, temperature and the main nutrient content of the water. By regularly testing these indicators, you can be timely Find water quality problems, and take appropriate measures to adjust, ensure the quality and stability of circulating water, so as to improve the efficiency of aquaculture and animal health.Iii. Summary
Recirculating aquaculture is an efficient, energy-saving and environmentally friendly aquaculture method, but in practice, the quality of recirculating water needs to be tested and managed regularly. Routine test indicators include pH value, dissolved oxygen, temperature, ammonia nitrogen, nitrite, nitrate, total phosphorus and total nitrogen. By testing these indicators regularly The quality and stability of circulating water can be guaranteed, and the efficiency of breeding and animal health can be improved.
