Pilot Test on the Removal of Typical Pollutants and Odor Substances from Water by Carbon-Sand Filter
Based on a water treatment plant(WTP)in Wuhan,a pilot study was conducted to explore the removal effect of carbon-sand filters on conventional pollutants and odorants in water.The total design flow rate of the pilot filter column was 15 m3/h,the normal filtration speed was 8 m/h.The upper layer of the filter material adopted Φ1.5 mm granular activated carbon,the lower layer of the filter material was made of 0.95 mm quartz sand.During the experiment,the optimal carbon sand combination ratio of the filter column achieved an average removal rate of 77.22％,55.55％,and 39.12％for turbidity,permanganate index,and ammonia.The effluent quality was better than that of the Standards for Drinking Water Quality(GB 5749-2022).The removal effect of odor and odor is better than that of sand filters in WTPs,and the finished water was clear,transparent,and odorless.The average removal rate of algae could reach 70.25％,which was equivalent to that of sand filters in WTPs.The average removal rates of soil odor and 2-methylisoborneol can reach 95.83％and 68.86％,and the finished water concentration was below its limit.The removal effect was significantly better than that of the sand filter in the WTP.
carbon-sand filterpilot studyconventional pollutantsodor substancesremoval rate of geosmin and 2-methylisoborneol
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