臭氧與活性炭深度處理長江原水試驗研究
[Abstract]:With the intensification of water pollution and the improvement of drinking water quality standards, the conventional treatment process has been difficult to meet the requirements of drinking water quality, drinking water advanced treatment technology has been paid more and more attention. Ozone and activated carbon, as important means of advanced treatment of drinking water, have been widely used abroad. Because of the vast area and changeable water quality in our country, there must be many problems in the operation of ozone and activated carbon technology, such as whether to add ozone before activated carbon, the point of adding ozone and the determination of dosage, etc. Taking the raw water in the upper reaches of the Yangtze River as the research object, the paper investigates the water purification effect of pretreatment process, ozone and activated carbon advanced treatment process respectively, so as to improve the water quality of the factory water. It provides data reference for the application of ozone and activated carbon in raw water of the upper reaches of the Yangtze River. The effects of three pretreatment processes, I. e., adsorption of powdered activated carbon, potassium permanganate and ozone preoxidation, on the removal efficiency of conventional treatment process were studied in a small scale experiment. The results showed that the three pretreatment processes could significantly improve the removal efficiency of organic matter, but had little effect on turbidity removal. The removal rate of COD_ (Mn), UV_ (254) by conventional treatment process was 24.87 and 19.48 respectively. After pretreatment with 20mg/L powder carbon, 2mg/L potassium permanganate or 1.0mg/L ozone, the COD_ (Mn) removal rate of water increased to 34.71%, 31.18% and 28.81%, respectively. The removal rate of UV_ (254) was increased to 34.31% and 27.50%, respectively. The advanced treatment of filtered water with ozone activated carbon and activated carbon was studied. The experimental results showed that the two advanced treatment processes could effectively remove organic pollutants, and the removal effect of ozone activated carbon was better than that of ozone activated carbon. The best dosage of ozone is 2.0 mg / L. When the ozone dosage is 2mg/L, the average concentration of COD_ (Mn) in the effluent of ozone activated carbon is 0.626 mg / L UV254, and the average concentration is 0.113 cm ~ (-1). Compared with filtered water, the removal rate of COD_ (Mn), UV_ (254) by ozonic-activated carbon process increased by 27.49% and 48.63%, respectively, and the removal rate of COD_ (Mn), UV_ (254) by activated carbon process increased by 20.1%, respectively. 42.95. Phenol pollution was simulated in the raw water of the Yangtze River, and phenol was removed by pretreatment and advanced treatment. The results showed that the removal efficiency of phenol could be improved by the three pretreatment processes, especially by ozone pre-oxidation. The removal rate of phenol could reach 56.20 when the amount of pre-ozonation was 1.0mg/L. After conventional treatment, ozone activated carbon and activated carbon advanced treatment process can effectively remove phenol. When the concentration of phenol in raw water is 0.01mg/L, the effluent quality of the two advanced treatment processes can reach the standard. When the concentration of phenol in raw water is 0.05mg/L, the advanced treatment process of ozone and activated carbon can make the water reach the standard. When ozone is used as pretreatment process, the optimal dosage of ozone is 1.0 mg / L, and the optimal dosage of ozone is 2.0 mg / L when advanced treatment of ozone and activated carbon is used. The combined use of ozone and activated carbon is a synergistic effect of ozone oxidation, activated carbon adsorption and biodegradation to achieve the effect of water purification.
【學位授予單位】:重慶大學
【學位級別】:碩士
【學位授予年份】:2013
【分類號】:TU991.2
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