The Experimental Study On Sewage Treatment By A Modified Type Of Bio-trickling Filter

At present, it is prevailing that using energy consumption, waste emissions andother issues has been put into wastewater treatment process. Waste emissions, such as"sewage", odor and solid residues, have made new pollution on the environment.Study of low energy consumption, a significant treatment effect of water treatmentprocesses for the reduction of secondary pollution of the environment in themaximum degree is crucial. Trickling filters for its low energy consumption, withoutsludge discharge, odor and other notable features, have a certain advantage to solvethe above problem. The processing load of traditional trickling filter is low, inadditional, the removal defects in nitrogen and phosphorus is poor, which is theexisting problems in the traditional trickling filter.To solve the above problems, we designed a modified bio-filter for the study.Respectively, denitrification and phosphorus removal performance of the system isinvestigated by a small pilot study, and the system is running performance in the pilotstudy, it is result to get denitrification and phosphorus removal capacity. In order toimproving the system a reasonable approach and further improve the system’s abilityto deal with sewage, the proposed structure and operating parameters of the system isexpected to be optimized. It is Obtained by testing the following importantconclusions:1, A composite of biological trickling filter nitrification trickling filter segment wellsubmerged section denitrification is weak, the final effluent nitrite content of up to18.3mg/L; flooded sections of artificial fillers can release carbon TN removalincreased from30%to80%, when the carbon-nitrogen ratio of4.5, the effluent CODwill not cause secondary pollution.2. Sponge iron is more suitable as a composite biological trickling filter submergedsection phosphorus adsorption medium, the temperature rise will increase theefficiency of phosphorus removal sponge iron absorption; common anions in water,sponge iron carbonate would weaken the effect of adsorption of phosphorus; using a5%hydrochloric acid solution combines ultrasonic synergistic renewable sponge 60Hz more economic regeneration rate increased to96.36%.3. In a pilot plant operation optimum hydraulic loading12.96m~3/m2d, at this time,the best of the organic load of0.9kgCOD/m~3d; When reflux ratio of100%, theremoval rate of COD increased to87.64%from the58.34%, ammonia nitrogenremoval rate increased to90.51%from the47.96%, but the system is less effectiveoverall nitrogen increased forced ventilation, the total nitrogen removal rate is stillless than50%; early running, the system removes the total phosphorus efficiency upto92%,61days after the effluent phosphorus concentrations higher than0.5mg/L ofurban wastewater treatment plant does not meet an A emission standards.