Closed Recirculating Aquaculture System in-depth Demand Report
Shandong Wolize Biotechnology Co., Ltd. specializes in the production of closed recirculating aquaculture system. After years of improvement in the production process, it has shown the outstanding performance. The raw materials are high quality and sourced from premium suppliers. Its service life is highly guaranteed by the strict test procedure which is in line with international standard. Meticulous attention is put into the whole production of the product, which makes sure that it will have a complete life cycle. All these thoughtful measures lead to huge growth prospects.
WOLIZE products have been winning increasing trust and support from customers which can be seen from the growing global sales of each year. The inquiries and orders of these products are still increasing without a sign of declining. The products perfectly serve customers' needs, resulting in good user experience and high customer satisfaction, which can encourage customers' repeat purchases.
At WOLIZE, we offer our customers who are inclined to do business with us samples for testing and consideration, which will definitely remove their doubts about the quality and performance of closed recirculating aquaculture system.
1. Turbidity:Turbidity is an important indicator to measure the amount of suspended particles in water. It can be detected using a turbidity meter. Generally speaking, the turbidity of water should be significantly reduced after being filtered through a filtering drum machine. For example, in unfiltered recirculating aquaculture water, the turbidity may reach tens or even hundreds of NTU (Nephelometric turbidity units), while after effective filtration, the turbidity should ideally be reduced to below 10 NTU. In some aquaculture scenarios with extremely high requirements for water quality, such as precious ornamental fish farming or fish fry cultivation, the turbidity after filtration may need to be controlled at 1 - 5 NTU.2. Suspended solids content (TTS):The content of suspended solids in the water is monitored in real time through online sensors. Before filtering, the aquaculture water is sampled and the content of suspended solids is measured, usually in mg/L. After filtering by a filtering drum, the sample is tested again. An effective filtering drum should be able to remove most of the suspended solids. For example, the suspended solids content of the water body with a content of 100 mg/L before filtering should be reduced to about 10 mg/L after filtering by a filtering drum. The specific reduction degree also depends on the filtering accuracy of the filtering drum and the characteristics of the suspended solids in the water body.3. Filter inspectionAfter the filtering drum has been running for a while, turn off the device and check the filter. If a layer of impurities is evenly adsorbed on the surface of the filter and no large particles of impurities penetrate, this indicates that the filtration effect is good. On the contrary, if there are many large particles of impurities that have not been filtered on the filter, or there are obvious holes that allow impurities to pass directly, it means that the filtration effect is not good. For example, during the inspection, it is found that a large amount of feed particles, fish feces and other substances that should be filtered remain on the filter instead of being intercepted outside the filter. This is a normal phenomenon; but if a large amount of impurities similar in size to fish feces are found to pass through the filter into the water outlet, there may be a problem with the filter. Perform integrity tests on the filter regularly. You can use pressure tests or bubble tests. In a pressure test, a certain pressure of gas or liquid is applied to one side of the filter to see if there is any leakage on the other side. A bubble test is to immerse the filter in water, pass gas from one side, and see if there are any bubbles coming out from the other side. If a leak is found, it means that the filter is damaged, which will affect the filtering effect.4. Compare the appearance and smell of the inlet and outlet waterAppearance:Carefully observe the appearance of the incoming and outgoing water. If the incoming water is turbid, has color (such as green due to more algae) or has visible impurities floating on it, the outgoing water should become clear and transparent after being filtered by the filtering drum. For example, if the incoming water looks turbid like muddy water, after being filtered by the filtering drum, the water should become clear and you can clearly see the bottom of the water or the inside of the equipment. odor:Some aquaculture water contains a lot of odors caused by the decomposition of organic matter, such as fishy smell, rancid smell, etc. After effective filtration by the filtering drum, the odor should be reduced. This is because the filtering drum removes some of the organic matter that produces odors, such as uneaten feed residues and fish excrement. For example, in a recirculating aquaculture system, the incoming water has a distinct fishy smell. After filtering by the filtering drum, if the smell is significantly reduced, this also indicates that the filtration effect is good to a certain extent.
Solid suspended particulate matter has adverse effects on various aspects of land-based industrial recirculating aquaculture systems, therefore, removing solid suspended particulate matter is the primary goal of recirculating aquaculture treatment. The majority of particles in the circulating aquaculture system are smaller than 100 microns in size. Due to factors such as water turbulence, biodegradation, and mechanical agitation, suspended particles that cannot be removed in a timely manner will break down into smaller particles, typically less than 30 microns in size. In this case, sedimentation treatment and mechanical filtration will become ineffective.Foam separation technology is a technology used to remove fine suspended particles. By introducing air into the water body, the surfactant in the water is absorbed by tiny bubbles, and then rises to the water surface with the buoyancy of bubbles to form foam, so as to remove dissolved and suspended substances in the water. At present, foam separation is considered as one of the main processes to effectively remove micro particles in the recirculating aquaculture system, and is an important part of the recirculating aquaculture system.Principle of Protein Skimmers1. Foam Fractionation PrincipleThe protein separator is mainly based on the principle of foam separation. In a recirculating aquaculture system, due to the presence of a large amount of organic matter in the excrement and residual feed of aquaculture organisms, surface active substances such as proteins in these organic matter have amphiphilicity (both hydrophilic and oleophilic). When a large number of tiny bubbles are introduced into water, these surface active substances will adsorb onto the surface of the bubbles. With the rise of bubbles, the bubbles with protein and other substances adsorbed on the surface form a foam layer on the water surface. The density of the foam layer is small, and it is easy to separate from the water body, thus removing organic matters such as protein in the water.2. Physicochemical ProcessFrom a microscopic perspective, there is surface tension between bubbles and water. When bubbles rise in water, organic molecules in the water will aggregate towards the surface of the bubbles under the action of surface tension. This is a physical adsorption process, accompanied by some chemical changes such as interactions between organic molecules and chemical reactions with the surface of bubbles. For example, some protein molecules may undergo denaturation, making them easier to adsorb onto bubbles.The Role of Protein Skimmers in Recirculating Aquaculture(1) Water Purification1. Remove organic matterProtein separators can effectively remove organic matter from water, including proteins, fats, sugars, etc. If these organic compounds accumulate in water, they will be decomposed by microorganisms, consuming a large amount of dissolved oxygen and producing harmful substances such as ammonia nitrogen and nitrite. Removing these organic compounds through a protein separator can alleviate the pressure of subsequent biological filtration and reduce the production of harmful substances in water. For example, without a protein separator, the chemical oxygen demand (COD) in water may rapidly rise to over 100mg/L, while with the use of a protein separator, COD can be controlled at around 30-50mg/L.2. Reduce the production of ammonia nitrogenDue to the removal of nitrogen-containing organic compounds such as proteins by the protein separator, the potential source of ammonia nitrogen in water is reduced. This is crucial for maintaining a low concentration of ammonia nitrogen in the recirculating aquaculture system, as ammonia nitrogen has strong toxicity to aquaculture organisms.(2) Improved Water ClarityThe protein separator can not only remove organic matter, but also carry away suspended particles with a particle size of less than 30 microns in the water, improving the transparency of the water and promoting the growth of aquaculture organisms.(3) Reduction of Disease TransmissionRemoving pathogen carriers: Organic matter and suspended particles in water are often carriers of pathogens, such as bacteria, viruses, and parasites. The protein separator removes these carriers, which reduces the chance of pathogen transmission in water and lowers the risk of disease infection in aquaculture organisms.
Recirculating Water Quality Parameters
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