Based on a water plant in Wuhan,a pilot study was conducted to investigate the removal effect of different carbon sand ratios on pollutants in water,and to explore the impact of different washing parameters on the washing effect.The results showed that the optimal thickness of the carbon layer and sand layer was 800 mm and 500 mm,and the optimal washing method was 16 L/(m2·s)air flushing for 3 minutes and interval of 2 minutes and 13 L/(m2·s)water flushing for 9 minutes.The average removal rates of ammonia and permanganate index by the 1# carbon sand filter were 46.99％and 54.81％,respectively.Its removal effect of organic matter was signif-icantly better than that of the sand filter.When the influent turbidity was below 2 NTU,the aver-age removal rate of turbidity by the 1# carbon sand filter could reach 85.67％,and the effluent met the requirement of the plant's filtered water turbidity.By using the optimal carbon sand ratio and washing method,the turbidity and permanganate index removal rates of the filtered water in the 1# carbon sand filter could reach 89.56％and 66.27％,respectively.Combining the above pilot study results and conducting research on sand and carbon sand filters in practical engineering,a complete set of carbon sand filter engineering transformation plan was formed,providing theoret-ical guidance for transforming sand filters into carbon sand filters in response to drinking water supply emergencies.
Carbon-sand filterPilot studyCarbon sand ratioWashing parameterRemoval effectTransformation plan
维普
万方数据
