A method for separating organic matter in reverse osmosis concentrated water

Abstract

The invention relates to a method for separating organic matters in reverse osmosis concentrated water. The method comprises the following steps: filtering reverse osmosis concentrated water via a glass fiber filter membrane, passing the reverse osmosis concentrated water through an XAD-8 resin column, washing the XAD-8 resin column by ultrapure water, and mixing the washing liquid and effluent to obtain mixed effluent; backwashing the XAD-8 resin column by hydrochloric acid, and backwashing the XAD-8 resin column by pure water, wherein the effluent component is a hydrophobic alkaline organic matter; regulating the pH value of the mixed effluent to be 2 by hydrochloric acid, and passing the mixed effluent through serially connected XAD-8 resin column and XAD-4 resin column, wherein the effluent is a hydrophilic organic matter; backwashing the XAD-8 resin column by sodium hydroxide, and backwashing the XAD-8 resin column by pure water, wherein the effluent component is a hydrophobic acidic organic matter; backwashing the XAD-4 resin column by the sodium hydroxide, and backwashing the XAD-4 resin column by pure water, wherein the effluent is a weakly hydrophobic acidic organic mater; carrying out Soxhlet extraction on the dried XAD-8 resin by methanol, carrying out rotary vaporization on the prepared extracting solution until the extracting solution is dry, and dissolving by pure water to obtain the hydrophobic neutral organic matters. According to the separation method provided by the invention, organic matters in the reverse osmosis concentrated water can be effectively separated.

Description

technical field [0001] The invention relates to a method for separating organic matter in reverse osmosis concentrated water, belonging to the technical field of sewage treatment. Background technique [0002] At present, membrane treatment technology has gradually developed into a water treatment technology widely used in industry and daily life. Among them, reverse osmosis technology has the characteristics of good effluent quality and high recovery rate, and has been successfully applied to industrial sewage reuse. After the industrial wastewater is treated, it enters the reverse osmosis process device, and the hardness ions and organic matter are removed to a large extent, and the effluent can be directly reused in the boiler. However, due to the limitation of influent water quality and treatment cost and other factors, the actual water collection rate of reverse osmosis membrane was 43% on average in 2004, and the researchers predict that it can only reach 61% by 2015,...

AI Technical Summary

Problems solved by technology

[0005] At present, some studies have shown that the organic matter in reverse osmosis concentrated water can be characterized and analyzed by methods such as ultraviolet spectroscopy, Fourier infrared spectroscopy, and fluorescence spectroscopy, but these methods are only for research on total dissolved organic matter (DOM) in reverse osmosis concentrated water , but it is impossible to classify and characterize DOM more carefully, and it is also difficult to track the changes of pollutant components in DOM during the treatment process

[0006] At present, for the separation method of organic matter in reverse osmosis concentrated water, there are no literature and patent technical reports at home and abroad.