| Artificial aeration strengthen technology what been widely appled in each project have developed many years, played an important function to defaecate the black smelly river course as well as emergency repair the water body. The goal of this topic is enhancing the water body water quality purification and the persistent effect well, changing the city polluted stream black smelly present situation by the artificial aeration strengthen technology. The topic have inspected the artificial aeration strengthen technology to the concentric river emergency repair and the defaecated effect influence; studied the different aeration intensity and different extraneous source pollution load to concentric river water quality artificial aeration defaecated effect influence under the small scale condition.Running the artificial aeration system in the scene movement, artificial reaerationon in a short time, to removes the water body organic matter and the nutrient salt not tangible effect, only to enhances the water body dissolved oxygen, to eliminate the water body odor to have certain function.In defines in the water body scope, the aeration intensity is bigger, the level of the water body dissolved oxygen is higher in the short time to elevate, advantageous in enhancing the rivers water quality, the display insolation internal combustion engine emergency processing function.As the concentric river such fluidity bad rivers, the aeration plays certain drift role.The waterwheel type aeration machine and the diving type aeration machine under the same operating mode condition, waterwheel type aeration machine reaerationon ability is stronger, smaller perturbation degree to the bottom mud of river bottom, after the aeration, the water body sense organ effect is better.Two kinds of aeration machine can reduce CODcr in the water body, the waterwheel type's denitrogenation effect better than the diving type aeration machine, but two kinds of aeration machine do not have the elimination effect to the soluble phosphate.In a limited range of water body, the non-extraneous source pollution, controled artificial aeration to the water body constant oxygenizement quantity, Pollution water's quality to be able to obtain the change for the better. The experiment discovered that when controled aeration intensity is 250L/(m3.h) can have the good defaecating effect, increased the aeration intensity to pollute water body defaecating rate not be enhanced. Therefore, suggested it does not need to increase the aeration intensity, avoid wasting. Under the small scale condition, when influent CODcr volume load is 0.02Kg/(m3.d), the ammonia nitrogen volume load is 0.004Kg/(m3.d), the TP volume load is 0.00013Kg/(m3.d), equal everyday influent about 4000m3 water into concentric river now, to the aeration elimination pollutant effect influence is very big, emergency repair effect is poorer; When the influent CODcr volume load is 0.005Kg/(m3.d), the influent ammonia nitrogen volume load is 0.00082Kg/(m3.d), the influent TP volume load is 0.00004Kg/(m3.d), to be equal everyday influent about 1000m3 water into concentric river now, the artificial aeration to the pollutant elimination can play the good elimination role.It is suggested that Kunshan concentric river disperses into the volume of contaminated water waste to reduce from 4000m3 to 959m3 about (additional cut-off volume of contaminated water waste 3000 tons) every day. After truncation dirt, the total pollutant quantity what inflow into the concentric river respectively is CODcr=220.57Kg/d, NH4+-N= 14.58Kg/d, TP= 3.45Kg/d every day.The aeration machine can reduce the pollutant measures CODcr is 220.69 Kg/d, NH4+-N is 41.66Kg/d, TP is 3.6Kg/d. After additional truncation dirt, running the existing artificial aeration condition can achieve the short-term government goal.All conclusions of the experiments have the important theory and the practice significance to the concentric river artificial aeration emergency repair and defaecating. |
PDF Full Text Request