CN101475245A - A kind of swimming pool water quality disinfection method - Google Patents

Abstract

The invention relates to the application fields of advanced oxidation technology and biological technology, in particular to a disinfection method for treating swimming pool water using the advanced oxidation technology of sulfuric acid free radicals. After the swimming pool water is added with flocculant to precipitate large particles, put persulfate or monoperoxyhydrogensulfate into the swimming pool water, and at the same time, the molar ratio of persulfate or monoperoxyhydrogensulfate: cobalt salt = 50～ Add cobalt salt at a ratio of 100:1, and the amount of cobalt salt added ranges from 0.1 to 1g/m3 of swimming pool water. Persulfate or monoperoxyhydrogensulfate is catalyzed by cobalt ions to generate sulfuric acid free radicals. The sulfuric acid free radicals with high oxidation activity can kill bacteria and algae in swimming pool water, and at the same time degrade urea and ammonia waste excreted by the human body. The method has good sterilizing effect, is safe and friendly to human body and environment, is safe to disinfect, has cheap medicaments, and has low operating expenses and costs.

Description

A kind of swimming pool water quality disinfection method

technical field

The present invention relates to the application field of advanced oxidation technology and biological technology, in particular to the application of advanced oxidation technology for generating sulfuric acid free radicals to kill bacterial organisms in swimming pools, and to treat urea, ammonia, creatinine, and arginine excreted by the human body Waiting for the waste method.

Background technique

Currently commonly used swimming pool disinfectants include chlorine-based and oxygen-based disinfectants. Chlorine-based disinfectants mainly refer to chlorine-containing disinfectants such as bleaching powder and sodium hypochlorite. The color of bleaching powder is white powder, the main ingredient is compound calcium salt, and its active ingredient is calcium hypochlorite (Ca(ClO) ₂ ). Calcium hypochlorite (Ca(ClO) ₂ ) dissolves in water to produce calcium oxide precipitate and Hydrochloric acid, and generate new ecological oxygen sterilization, strong bactericidal power. The disadvantage is that storage and transportation are inconvenient, and there are residues in the pool water. Sodium hypochlorite is a yellow liquid that dissolves in water to produce hypochlorous acid (HClO), which has a strong bactericidal ability. The advantage is that it is easy to use, there is no residue in the pool water, and the continuous effect is good; the disadvantage is that it is inconvenient to store and transport, and the cost is high. The main disadvantage of chlorine-based disinfectants is the production of chlorine-containing by-products such as trichlorethylene, which can cause harm to the skin, eyes, and respiratory system, as well as "three causes" such as carcinogenic, teratogenic, and mutagenic. effect. Oxygen-based disinfectants mainly refer to products such as ozone. Ozone is generated by an ozone generator. Ozone has a high rate of killing bacteria, viruses and other microorganisms in water, and the speed is fast. It can completely remove pollutants such as organic compounds without causing secondary pollution. And can reduce biochemical oxygen demand and chemical oxygen demand, remove nitrite, suspended solids and decolorization. Its disadvantage is that ozone disinfection requires high pH value of water, and the decay period is short, so it is suitable for small swimming pools. In addition, the price of ozone generator equipment is relatively expensive, and the daily maintenance cost and operating cost are relatively high.

Contents of the invention

The purpose of the present invention is to provide a method for killing bacterial organisms in swimming pools using advanced oxidation technology that produces sulfuric acid free radicals. This method can not only kill Escherichia coli harmful bacteria, algae and other microorganisms in the water, but also degrade the bacteria in the swimming pool. The urea, ammonia, creatinine, arginine and other wastes discharged by the human body do not produce harmful disinfection by-products, which are friendly to the human body and the environment.

Technical principle of the present invention: add a certain amount of cobalt salt and persulfate (S ₂ O ₈ ^2- ) or monoperoxyhydrogensulfate (HSO ₅ ^- ), persulfate (S ₂ O ₈ ^2- ) or monoperoxyhydrogensulfate (HSO ₅ ^- ) is catalyzed by cobalt ions (Co ²⁺ ) to generate highly active sulfuric acid free radicals. The specific reaction formula is as follows:

Co ²⁺ +S ₂ O ₈ ^2- →Co ³⁺ +SO ₄ ^·- +SO ₄ ^2- (1)

Co ²⁺ +HSO ₅ ^- →Co ³⁺ +SO ₄ ^- +OH ^- (2)

The sulfuric acid free radicals produced by the above reactions have high oxidation activity and can react with organisms in swimming pool water, destroying biological cell membrane lipid layers, proteins, carbohydrates, and DNA, thereby killing bacteria and algae organisms, and can also degrade Human urea and ammonia wastes from swimming pools.

The technical solution of the present invention is: after adding flocculant to the swimming pool water to precipitate large particle impurities, put persulfate (S ₂ O ₈ ^2- ) or monoperoxyhydrogensulfate (HSO ₅ ^- ) into the swimming pool water, and at the same time Dosing cobalt salt at a molar ratio of S ₂ O ₈ ^2- or HSO ₅ ^- :Co ²⁺ =50～100:1, the dosage range of cobalt salt is 0.1～1g/m3 swimming pool water. Persulfate (S ₂ O ₈ ^2- ) or monoperoxyhydrogensulfate (HSO ₅ ^- ) is catalyzed by cobalt ions (Co ²⁺ ) to generate sulfuric acid free radicals, which can kill E. coli and algal organisms in swimming pool water, while degrading urea and ammonia wastes from humans. The implementation effect can be measured by the inactivation rate of Escherichia coli and the removal rate of ammonia, creatinine and arginine.

The beneficial effects of the present invention are:

(1) The effect of killing creatures is good. Under the condition of low concentration (KHSO ₅ , 12ppm; CoSO ₄ , 0.1ppm), Escherichia coli is nearly 100% removed after 1 hour;

(2) It has a good effect on degrading the waste discharged from the human body. Under the condition of low concentration of reagents (KHSO ₅ , 12ppm; CoSO ₄ , 0.1ppm), the ammonium ions can be removed by nearly 70% after 5 hours;

(3) The present invention does not contain chlorine, has no by-products of disinfection, and is safe and friendly to the human body and the environment. At the same time, the agent acts through a catalytic reaction, and the free radicals of sulfuric acid are released slowly, so the sterilization time is long, the sterilization is uniform, it is non-irritating to the human body, and it is safe to disinfect;

(4) No additional special equipment is required, low one-time investment, low energy consumption, cheap medicaments, and low operating expenses and costs.

Description of drawings

Fig. 1 is the swimming pool water treatment process flow chart of the present invention

Detailed ways

Example 1

After the swimming pool water is added with flocculant to precipitate large particles, the concentration of Escherichia coli bacteria is measured to be 10 ⁶ ~ 10 ⁷ cfu/mL. Add potassium persulfate (KHSO ₅ ) and cobalt sulfate to the water. According to the standard swimming pool volume (50m×25m×2m), add 27 kg of potassium persulfate and 0.25 kg of cobalt sulfate per 2500 tons of swimming pool water. After 1h of treatment, sampling test. The treated swimming pool water was cultivated by the bacterial culture method, and after 24 hours of cultivation, the concentration of Escherichia coli in the water dropped to 10 ² -10 ³ cfu/mL, and the killing effect was close to 100%.

Example 2

After the swimming pool water is added with flocculant to precipitate large particles, the concentration of ammonium ion (NH ₄ ^-1 ) is measured to be 1ppm. Potassium hydrogen persulfate (KHSO ₅ ) and cobalt sulfate are added to the water, according to the standard swimming pool volume (50m× 25m×2m), add 24 kg of potassium persulfate and 0.2 kg of cobalt sulfate for every 2500 tons of swimming pool water. After 5 hours of treatment, the concentration of ammonia ions in the water dropped to 0.3ppm, and the removal rate was close to 70%.

Claims (1)

1, a kind of swimming pool water disinfection method, it is characterized in that, swimming-pool water is through after adding flocculation agent precipitation macrobead foreign material, persulphate or single peroxosulphuric hydrogen salt are put in the swimming-pool water, while is persulphate or single peroxosulphuric hydrogen salt in molar ratio: the ratio of cobalt salt=50～100:1 adds cobalt salt, and the quantitative range that adds of cobalt salt is every cubic metre of swimming-pool water of 0.1～1g/.