Two-stage alkaline washing type water body dissolved organic matter extraction equipment and its application method

Abstract

The invention provides two-stage alkali cleaning type extracting equipment for organic matters dissolved in a water body. The extracting equipment comprises a raw water supply unit, a pretreatment unit, a nanofiltration concentration unit, an acidity-basicity adjusting unit, a finished product liquid extracting unit, a water tank and a total control system, wherein the finished product liquid extracting unit comprises a drip washing device, an organic chemical tank, an alkali liquor chemical tank, a first-stage adsorption enrichment device, a first ion exchange device, a second-stage adsorption enrichment device and a second ion exchange device; and the finished product extracting unit is used for adsorbing and purifying the organic matters dissolved in concentrated water to obtain a high-concentration extract, and high-purity solid powder of the organic matters dissolved in the water body is obtained after freeze drying.

Description

technical field [0001] The invention relates to the field of organic matter extraction, in particular to two-stage alkaline washing type water body dissolved organic matter extraction equipment. Background technique [0002] Dissolved organic matter in water 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 ...

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Problems solved by technology

[0005] The above-mentioned utility model can automatically realize the enrichment and separation of dissolved organic matter in water; the above-mentioned patent adopts XAD-7HP macroporous resin for separation, which can avoid the influence of high salinity in reverse osmosis concentrated water on the separation effect of organic matter. Characterize various characteristics of organic matter in each component of reverse osmosis concentrated water; but it is limited to the separation of organic matter, and the degree of automation is not high, the steps are cumbersome, the operation is inconvenient, and high-concentration organic matter cannot be obtained; in addition, the above-mentioned utility model The patent is only applicable to the separation of organic matter in sewage and wastewater, and is completely inapplicable to fresh water or seawater; secondly, there is no nanofiltration osmosis process in the system disclosed in the above-mentioned utility model patent, resulting in low separation efficiency of organic matter; thirdly, the international The general organic matter of the Humic Acid Society (IHSS) is divided into humic acid and fulvic acid, and there is no hydrophilic acidity, hydrophilic neutrality, hydrophilic alkalinity, hydrophobic alkalinity, hydrophobic acidity, hydrophobic water nature and other components, and the above-mentioned several components are different from the components of the organic matter protected by the present invention

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