Method for singlet state oxygen treatment on reverse osmosis concentrate
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A technology of reverse osmosis concentrate and singlet oxygen, which is applied in the direction of oxidized water/sewage treatment, special treatment targets, water/sewage treatment, etc., can solve the problem of no reverse osmosis concentrate, etc., and achieve simple operation and moderate price , highly reactive effect
Active Publication Date: 2016-02-24
HARBIN UNIV OF SCI & TECH
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[0005] However, there is currently no effective method for treating reverse osmosis concentrate
Method used
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specific Embodiment approach 1
[0022] Embodiment 1: This embodiment is a method for treating reverse osmosis concentrate by using singlet oxygen, which is realized through the following steps:
[0023] 1. Add pyruvic acid to the water to be treated by reverse osmosis, and perform reverse osmosis treatment;
[0024] Two, add peroxide to the reverse osmosis concentrated solution obtained after step one reverse osmosis treatment, stir, control the mol ratio of pyruvic acid and peroxide to be 1:(1~10), control peroxide concentration to be 100~ 5000mg / L, the hydraulic reaction residence time is 30-120min, that is, the treatment of the reverse osmosis concentrate with singlet oxygen is completed.
[0025] For the specific process of this implementation mode, see figure 1 .
[0026] The principle of a method for treating reverse osmosis concentrate by using singlet oxygen in this embodiment is as follows: first, in the water to be treated by reverse osmosis, the added pyruvic acid can interact with the calcium a...
specific Embodiment approach 2
[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the peroxide is a mixture of one or more of persulfate and percarbonate in any ratio. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0029] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the persulfate is sodium persulfate (NaHSO5 ), potassium persulfate (KHSO 5 ), ammonium persulfate (NH 4 HSO 5 ), calcium persulfate (Ca(HSO 5 ) 2 ), magnesium persulfate (Mg(HSO 5 ) 2 ) in one or several mixtures in any ratio. Others are the same as in the first embodiment.
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Abstract
The invention relates to a reverse osmosis concentrate treatment method and especially relates to a method for singlet state oxygen treatment on reverse osmosis concentrate. The method comprises adding pyruvic acid into water to be treated, carrying out reverse osmosis treatment, adding peroxides (such as peroxymonosulfate and percarbonate) into the pyruvic acid-containing reverse osmosis concentrate, carrying out stirring and carrying a reaction process. Pyruvic acid is bonded to calcium and magnesium ions in water to be treated so that a pyruvate complex is produced and scale inhibition effects are obtained, the peroxides undergo a reaction in the presence of the pyruvate as a catalyst to produce singlet state oxygen, and the produced high-activity singlet state oxygen can fast react with pollutants in the reverse osmosis concentrate, oxidize organic matters and inactivate microbes so that pollutant removal is realized. The method utilizes green and safe pyruvic acid and peroxides without toxic or side effect, has high reaction depollution efficiency, does not produce poisonous and harmful by-products and is a high-efficiency reverse osmosis concentrate treatment method with functions of complexation scale inhibition and oxidation pollutant removal.
Description
technical field [0001] The invention relates to a method for treating reverse osmosis concentrated liquid, in particular to a method for treating reverse osmosis concentrated liquid with singlet oxygen. Background technique [0002] Reverse osmosis treatment technology (RO) is a membrane separation and filtration technology powered by pressure difference. It has the advantages of low energy consumption, easy operation, small system footprint, and good treatment effect. With the development of recovery system and the improvement of pretreatment technology, the cost of reverse osmosis treatment technology has decreased year by year. At present, it has been widely used in scientific research, medicine, food, beverage, seawater desalination, environmental protection and other fields. [0003] However, while reverse osmosis technology is used to produce recycled water, the impurities in the influent water are concentrated at a high concentration, which can produce a reverse osmo...
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