The Experimental Study On SBR Treating City Garbage Leachate

With the economical development and the living level increasing, the garbage disposal becomes one of the most important measures in environmental protection. Landfill is widely used for the lower investment and the operating cost, so the twice contamination caused by the garbage laechate must be solved in construction of Landfill. As the different the urban planning population and the average per person life garbage output, the quantity of garbage laechate is different. There are various of factors which brought on output, such as, the rainfall, the transpiration rate, the surface runoff, the groundwater permeating, the garbage characteristic, the stratigraphic configuration, the surface mantlerock and the draining water facility established. Comparing with the sewage, the quality of the garbage laechate has many different characteristics, for example: the high COD, high metal, higher ammonia nitrogen, the acute change in quality of water.Because the unusual characteristics of SBR: high anti-impact load capacity, widely used in different quality sewage disposal, suit for high COD sewage treatment , this experiment uses the SBR tank as the garbage laechate secondary biological treatment craft.The sewage used in this experiment is which the garbage laechate from Wuhan erfei-mountain landfill treated by ammonia blowing-out and anaerobic biological treatment in UASB. Firstly, the activated sludge in the tank is domesticated. 45 day later, NH₃—N and TN were obviously removed by the nitrifying and the denitrification bacteria of the activated sludge, NH₃-N and TN respectively achieve above 90%, 59%.Analyzed the factors which make an effect on the result, had made an conclusion that the best to carry on the tank. Analyzing three kinds of parameters: the movement way, discharged the ratio, the water pH value were selected in experiment, the conclusion had been drawn: On the conditions of the anoxic 3.0h/aerobic10.0h/ anoxic 2.0h/ aerobic 6.0h and sewage putting in batches, the draining ratio 1/3, pH of sewage 8.0, the COD_Cr, NH₃—N and TN's removal ratio were.71.7%, 92.4%, 69.8%。...