Xử lý nước thải | Trong nuôi tôm - thủy sản

The silver aquaculture industry has a large market share in the agricultural sector, which plays an important role in the province's economy. As a result, the water source for aquaculture is increasing rapidly. In recent years, the aquaculture industry has benefited from the development of farmers in other provinces. The technical level of the farmer and the higher the level of cultivation, the higher the use of fertilizers and antibiotics in shrimp farming. The eradication, processing of pesticides before releasing into the environment is not much cared for by shrimp farmers. The amount of pesticides produced during the cultivation process, eating habits, shrimp farming and the process of nutritional transformation are the main sources of pollutants. In the water, there is also a surplus of antibiotics, medicines. The water contains a large amount of nitrate, phosphorus and other nutrients, which creates hypochlorite, causing bacteria to grow. Most of the surplus product in shrimp farming in the bottom of the pond is a harmful source for shrimp and causes shrimp farming to have a very toxic layer, lack of oxygen and contain a lot of harmful substances such as making shrimp always stressed, undernourished, increase in growth, decrease and easily get sick due to bacteria and a variety of chemicals. The discharge in the pond and pump in the bottom of the pond in shrimp farming and sell shrimp to the natural sewer system, which is not handled will cause the sewer system to be clogged, the water environment will naturally be seriously polluted. If the discharge occurs continuously, there is no time to stop for the environment to be restored, but itself is cut off, then the sewage system will accumulate, causing the water environment to become polluted, shrimp farming and selling shrimp will be more at risk. On the other hand, the bottom floor serves areas where shrimp farming is not complete, the sewage system is a service system for agricultural farming needs, the shrimp farming area does not have a separate sewer system, even many sections of the sewer system are clogged, the bottom of the sewer system is higher than the bottom of the shrimp farming pond. The consequence is that the disease is still lurking in the shrimp farming area when the shrimp pond is sick, water is discharged into the outdoor environment, so the possibility of infection is very high. The process is completely closed, so I will take very little water from the outside, and so I will reuse the water, it will first be a disease-safe system for my farm, but the disease does not infiltrate from the outdoor environment, secondly, the discharge materials are not discharged into the outdoor environment, so it affects the overall environment of the farm system in other people's systems around. There are many methods of disposing of shrimp farming water, ranging from controlling the amount of food and medicine used, to methods of disposing of sewage water, and combining them with the irrigation system. Below are solutions that do not use chemicals to dispose of sewage water from the pond. Using sanitary pesticides, combining the external components of the sanitary growth process, the overall external enzymes, bio-nutrients, minerals that activate the initial growth, and the chemical compounds that have the effect of dissolving the dissolved chemical and non-dissolved from the shrimp, food to create stability, maintain water quality and water color in the pond, can absorb pollutants based on the material transformation process in the ecosystem through the food chain. Usually people use fertilizer plants, grass or weeds to absorb nitrate, phosphorus and carbon in the water to increase carbon dioxide. A study by the Nha Trang Institute of Natural Sciences on the ability to manage the environment based on specialized shrimp farming shows that the weeds are able to absorb a large amount of salt with high speed. In the food chain, people also use aquatic animals in the coastal water area such as crickets, squirrels, lizards, to consume fertilizer plants and improve the conditions of the bottom of the pond or the types of fish that eat fertilizer plants and organic fish such as catfish, catfish, and two species of fish are considered a suitable solution to manage the water of industrial shrimp farming to protect the environment. Nong Lam University, Hue also studied the ability to manage the organic matter of catfish, catfish, and snails in the water of the super-dense shrimp farm. The results show that using a suitable ratio of animal subjects to help the water after processing meets the requirements of the regulations, although the consumption of plastic is still higher than allowed.