The Mimic Experimental Research On The Combined Technique Of Water-lifting Aeration And Enhanced GAC Emergent Adsorption On Site

In view of the frequently happened emergent pollution in reservoirs and lakes, the technology of water lifting aeration, combined with enhanced GAC, are brought into play to realize mutual compensation of advantages. The objective is to solve the problem of emergent absorption on site of accidental water pollution and periodic high strengthened contamination.The refining device on site of water lifting aeration and enhanced GAC is simplified. The experimental system of enhanced GAC absorption, which is designed on condition of water lifting aeration, is set up, and the research contents are as follows: (1) The design, assembling and operation of the simulation system; (2) Suspended fluidized state of GAC in the experimental system; (3) The absorption effect on objective pollutants, of which aniline is the main ingredient; (4) The absorption effect on humics pollution.By comparison and selection of carbon, combined with the particularity of the water lifting aeration and enhanced GAC refining device, the columnar coaly 30 activated carbon is selected. According to the experiment, we can conclude that the fluidized state obtained simply by gaseous fluid is not perfect, which should be improved. When the concentration of aniline is 2.0mg/L, the removal effect on aniline is the best, of which the clearance is 85.85% after three-hour working, however, after this, the clearance still rise but it becomes slowly, and the removal rate is 94.38% in ten-hour time interval, which has satisfied the limiting value of surface water for drinking. In the experiment simulation system,the removal effect on the CODMn,UV254,UV410 and Color, which is caused by Humics pollution, is not perfect. After two-hour working, the removal rare of CODMn,UV254,UV410 and Color were 9.0%.12.5%.9.5%.10.9% respectively; After four-hour working, the removal rare of CODMn,UV254,UV410 and Color were 18.1%,26.7%,19.1%,20.2% respectively; After fourteen-hour working, the removal rare of CODMn,UV254,UV410 and Color were 28.6%.49.2%.33.3%.20.9% respectively.Other technology should be introduced to improve the effect. At the same time, when there are two kinds of pollutants, the air amount, capacity of water delivery, the thickness of carbon layer, the initial concentration and the recycle times have influence on the clearance effect. When there is emergent pollution, rise the capacity of water delivery, carbon layer and recycle times can enhance the effect. Besides, the clearance under the combined action of chemical oxidation and enhanced GAC emergent absorption on site is also studied, which shows that the pre-oxidation of potassium permanganate on the activated carbon's absorption is not obvious, but it is effective for the clearance of humics pollution.The combined technique of water lifting aeration and enhanced GAC emergent absorption on site can control pollution from the source. It offers technical support for solving the problem of emergent pollution, and it will play an important role in the improvement of water quality and the establishment of security protection system of drinking water.