As a new type of water treatment process,ozone bio-activated carbon combines the advantages of ozone oxidation and bio-activated carbon adsorption.This paper mainly studies the treatment effect and optimization scheme of ozone bio-activated carbon technology applied to the actual operation of water treatment plant(WTP).The operation of the ozone-bio-activated carbon treatment process is subject to regular analysis,with testing of water quality indicators such as the permanganate index,ammonia(in terms of nitrogen)and dissolved oxygen.Furthermore,activated carbon is sent for inspection on a regular basis,and data is collected on the dosage of ozone,the residual concentration of ozone in water,and relevant process parameters and bio-activated carbon filter backwash data at specific times.It is determined that the biofilm process could be evaluated using a continuous water quality index test,complemented by stage-specific activated carbon mirror tests and biological test results.The bioactivated carbon filter reached maturity within approximately 11 months of operation.The removal rate following the maturation of the biofilm exhibited a consistent seasonal trend,with the permanganate index removal rate range from 30％to 40％,the ammonia(in the form of ammonia)removal rates range from 45％to 50％.In consideration of the actual backwash situation,it is determined that the backwash cycle and air flushing frequency should be adjusted in order to optimise the backwash program.This would allow for the determination of the most appropriate backwash program for the WTP,with an air flushing intensity of 30 m3/(h·m2).The summer cycle of 7 days comprises an initial filtration of water for 45 minutes;the autumn,winter and spring cycle of 14 days also comprises an initial filtration of water for 45 minutes.By increasing the amount of ozone dosage,the amount of sodium hypochlorite was reduced.The results of the study of the industry with the same process water plant research have a reference value and guiding significance.In the future,further studies will be conducted to quantify the improvement of ozone dosage,with the aim of reducing disinfection by-products such as trihalomethanes in the water.Additionally,the potential use of ozone in the charcoal pond outlet dissolved oxygen to indicate the residual ozone concentration in the water will be investigated.The objective is to establish a standard reference indicator for the residual ozone concentration in the water,with a target value of 0.01 mg/L for the operating standard.
关键词
臭氧生物活性炭/生物膜/反冲洗/臭氧投加量/水中余臭氧/溶解氧
Key words
O3-BAC/biofilm/backwash/ozone dosage/residual ozone in water/dissolved oxygen(DO)
维普
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