Two-stage alkaline washing extraction device for dissolved organic matter in fresh water

Abstract

The invention provides a two-stage alkali washing type extraction device of organic matters dissolved in a fresh water body. The two-stage alkali washing type extraction device comprises a raw water supply unit, a pretreatment unit, a reverse osmosis concentration unit, a pH (potential of hydrogen) value regulation unit, a finished solution extraction unit, a water tank and a master control system, wherein the finished solution extraction unit comprises a primary-stage adsorbing and gathering device, an ion exchange device A, a secondary-stage adsorbing and gathering device, an ion exchange device B, an eluting device and a chemical adding device; in the finished solution extraction unit, the primary-stage adsorbing and gathering device, the secondary-stage adsorbing and gathering device and respective corresponding ion exchange devices are used for adsorbing and purifying the organic matters dissolved in concentrated water to obtain a high-concentration extraction solution; the high-concentration extraction solution is frozen and dried to obtain high-purity powder solid of the organic matters dissolved in the fresh water body. The two-stage alkali washing type extraction device of the organic matters dissolved in the fresh water body is simple in structure and convenient to operate.

Description

technical field

[0001] The invention relates to the field of organic matter extraction, in particular to a two-stage alkaline washing type extraction device for dissolved organic matter in fresh water. Background technique

[0002] Dissolved organic matter is a kind of natural macromolecular soluble organic matter mixture that can pass through a filter membrane with a pore size of 0.45 μm in water. Studies have shown that dissolved organic matter in fresh water mainly includes acidic substances such as humic acid and fulvic acid, as well as small molecular substances such as polypeptides, polysaccharides, and amino acids. Among them, small molecular substances such as polypeptides, polysaccharides, and amino acids account for a small proportion and are easily decomposed by aquatic organisms. Dissolved organic matter, mainly including acidic substances such as humic acid and fulvic acid, has a large molecular weight and is difficult to degrade. It is the main component of di...

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