China is a big country of water resources, but also a poor country of water resources. Seawat✘er as an important part of water resources, the effective utilization< of seawater is one of the important measures to solve the crisis of water r'esources in china.
Membrane technologies used in seawater desalination include reverse osmoβsis, electro osmosis (ED) and membrane distillation (MD). Desalin ation can greatly reduce the cost of seawater desalination by reverse osmosis m'embrane desalination rate as high as 99.6%. The emergence and d☆evelopment of reverse osmosis technology has greatlyλ reduced the cost of seawater desalination, and now the reverse osmosis has become the most economi$cal means of water desalination, which has the following advantages:
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The application of membrane method in desal ination of seawater is very mature.
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The reverse osmosis membrane material, membrane element production technology φis mature, the price drops greatly, and the application cost is l✘ower.
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Small power consumption, the existing technology h"as reached tons of water consumption of 1.8-4.5 degrees, which is beneficial to save ene€rgy and reduce the cost of water production.
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Desalination of seawater by membrane process is unit c∏ombination, and the scale of construction can be expanded step by st ep, which is convenient for popularization and application.
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Membrane equipment desalination equipment investment involves ci&vil engineering, power engineering, automatic control e→ngineering, pipeline engineering and other related projects, they are mature™ technology and engineering, and its investment risk is very small.
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Reverse osmosis desalination of seawater, coupled with Nan©o filtration membrane technology, retains the existence of a variety of trace minerals in the sea water which are beneficial to humans, has biological activity,£ which is a safe drinking water that can directly to drink.
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There is no phase change in the reverse ↕osmosis desalination seawater, concentrated seawater salinity is 2-3 tim≥es higher than the original seawater, the concentrated seaw ater can be used not only to breed such as abalone, sea cuc₹umber, scallop, large yellow croaker, shrimp, eel and other high-end products,↓ but also can be more economical to extract bromine, magnesium, uranium, gyps★um, metabolite, salt and magnesium sulfate, potassium oxide, magnesium chloride, magnesium p↕hosphate, magnesium oxide and other marine chemicals, to realize comprehensive utili∞zation of marine resources.
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The membrane used is a sanitary macromolecule ma₩terial, which can completely reject harmful substances such as baλcteria, viruses, collagen bodies, heavy metal ions and so on, which will bene↔fit people's health.
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