Winter dredging of fish ponds is an essential part of fishery production. In recent years, some fishpond contractors have only paid attention to the benefits in front of their eyes, and they have devoted their efforts to seeding, feeding, and fertilizing. They have neglected the necessary dredging work. Year after year, the silt in the bottom of the pond has grown thicker and thicker. The general ponds The silt thickness is about 40cm. Some intensive culture ponds and ponds close to villages and towns have thicker sedimentation, leading to deterioration of the ecological conditions of the pond. The harms are mainly in the following aspects: 1. Lighten the pond, reduce the water load, and fish life. The smaller water space will directly affect the fish yield per unit area. 2, resulting in the lack of oxygen in the fish pond water. Because the sludge contains a lot of organic matter. In the summer and autumn high temperature seasons, organic matter is oxidized and decomposed under the action of bacteria, and continuously consumes a large amount of dissolved oxygen in the water. This often results in the exhaustion of dissolved oxygen in the lower water layer of the pond, resulting in the lack of oxygen. Under anaerobic conditions, anaerobic bacteria multiply, producing ammonia, hydrogen sulfide, and organic acids that are harmful to fish. These substances are strongly anaerobic, causing the pool water to lose its “oxygen debt†and exchanged with the convection of the upper and lower pools at night. Caused by the lack of dissolved oxygen in the entire pond water, pool fish anoxic floating head. In the event of continuous rain, low pressure, hot weather, thunderstorms, or northerly winds and other undesirable weather, the oxygen deficit in the fish pond is even more serious and the flooding of fish ponds can easily occur. 3. A large amount of nitrogen-containing organic matter in the sludge, whether subjected to aerobic decomposition under the action of nitrosobacteria, or anaerobic decomposition under the action of nitrifying bacteria, the final product of both is ammonia. Ammonia is very toxic, and even low concentrations can inhibit the growth of fish and other aquatic organisms. 4. There are many fish parasites and pathogenic microorganisms in the sludge. When pond water quality deteriorates, acidity increases, and the environment deteriorates, the disease resistance of fishes declines, and pathogenic microorganisms, etc., have a large number of breeding and spreading, leading to outbreaks and epidemics of fish diseases and causing losses. In recent years, the frequent occurrence of fish storms in ponds, ponds, ponds, etc. has a direct relationship with the serious silting of ponds. According to the survey, the siltation of fish culture ponds generally increases at a rate of 5-10cm per year. Intensive ponds and ponds with sewage flowing into the villages and towns have a faster deposition rate. Pond silting has become a major factor restricting pond production. one. It is imperative for the fish ponds in the pond to maintain stable and high yields.
Thickener is a kind of biological gel that integrates thickening, suspension, emulsification, and stability. Thickener can improve the viscosity of the material system, keep the system in a uniform and stable suspension or emulsion state, or form gel. Most thickeners also have have the function of emulsification. It can be divided into two categories: natural and synthetic.
Thickener is widely used in food, cosmetics, detergent, latex, printing and dyeing, medicine, rubber, coatings, etc.
Polyvinyl Pyrrolidone PVP,Xanthan Gum As Thickener,Cosmetic Grade Xanthan Gum,Homopolymer of Vinylpyrrolidone
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