The ponds that use sewage to raise fish should generally be larger in size, and should be about 6670 square meters. Because the purification capacity of ponds is limited, the water quality is not easy to control. The depth of water should be 2-3 meters. The pond should be east-west and the two short sides should be made slightly oval so that the water does not form a "dead corner". There are elliptical arcs installed on both sides of the inlet pipe and drain pipe, the bottom of the pool has a certain degree of slope, generally about 5%. This is not only conducive to the removal of dirt, but also conducive to fishing. Two to three inlet and outlet pipes are provided, and they are located at both ends, so as not to form a "dead angle", which is beneficial to the flow of water and has a good purification effect. The height of the inlet pipe is higher than the surface of the water, forming a relatively large flow of water when entering the water, which is beneficial to oxygenation of the pool water. At the same time, water intake pipes and gates should be provided in front of the water inlet pipe to control the injection time and flow of sewage.
The stocking species are mainly scalefish, accounting for about 80%-90%. Others can be used with cockroaches, cockroaches, cockroaches, cockroaches, tilapia and grass carp which account for 10%-20%. Stocking densities range from 1,000 to 1,500 tails per 667 square meters.
The feeding and management of wastewater aquaculture ponds is mainly to grasp a reasonable amount of sewage perfusion, maintain a certain degree of fatness in the pool water, and prevent poisonous sewage from entering the fish pond. The specific methods are as follows:
1. Master the source, nature, and discharge of wastewater, and minimize or avoid the use of industrial wastewater containing toxic substances.
Second, the waterway is longer and adopts the form of open channel to fully expose the sewage, dissolve oxygen and precipitate. At the same time, the inlet and outlet pipes are used alternately.
Third, set the sedimentation tank, so that the sewage first into the sedimentation tank, reduce the toxicity of the sewage. The conditional units can also build Dianchi Lake and use Dianchi Lake as a sedimentation tank to play the role of “one function and two effectsâ€.
Fourth, control the amount of sewage introduced. The body of water that is injected into the pond at a time cannot exceed 3% of the total pond capacity, and the transparency is controlled between 20-35 cm.
5. The location of the food table should be far away from the sewage outlet so as not to cause fish poisoning.
6. Accelerate sewage purification with an aerator, speed up the material circulation in ponds, promote the reproduction of plankton and fish growth, and prevent fish from floating.
Hebei Abiding Co.Ltd, a professional food supplier, was established in 2005 in Shijiazhuang, China. We specialize ourselves in supplying Organic Tomato Paste and organic pastas. Conventional ones are also available to supply. We can make the private labels according to the customers' requirement. Our products have EU, NOP and JAS organic certificates. They are also Kosher certified. We have business relationships with importers and wholesalers from around the world, mainly in Europe and America. Over the years, we have earned highly recognition from clients due to our qualified service and steadily increase our market share year after year.
Products and Services
1. OEM service provided. We can do OEM with your brand(print, graphics on the products).
2. We have different kinds of Organic Pasta.(One-shop service)
3. International certificates. Guarantee our quality and make sure you can sell them all over the world!
Organic Pasta
Soybean Paste Noodles,High Protein Food,Organic Black Rice Noodle,Spaghetti Pasta
Hebei Abiding Co.Ltd , https://www.hebeiabiding.com