Calcium-based compounds are used as fluorine removal treatment materials in water.However,due to the water solubility of calcium fluoride,there is a problem with low fluorine removal performance.For this reason,variou...Calcium-based compounds are used as fluorine removal treatment materials in water.However,due to the water solubility of calcium fluoride,there is a problem with low fluorine removal performance.For this reason,various removing agents including phosphorus have been developed.We have found that a combination of aluminum phosphate recovered from incinerated ash of the sewage sludge and refuse incineration ash has a high fluorine removal performance.At the highest removal performance,F ion concentration of the treated water reached 0.1 mg/L,so an optimal formulation method was investigated.展开更多
The compounds of aluminum phosphate are used to remove the fluorine compounds from wastewater. The fluorine removal agent using the ash of sewage sludge and the municipal waste in addition to sulfuric acid were invest...The compounds of aluminum phosphate are used to remove the fluorine compounds from wastewater. The fluorine removal agent using the ash of sewage sludge and the municipal waste in addition to sulfuric acid were investigated. The removal agent showed high removal performance, and the fluorine concentration of the treated water reached below 0.1 mg/L, and the noticeable elution of the harmful metals from the ashes were not found in this experiment.展开更多
Large amounts of sludge has accumulated in the Inner Bay,which is one factor of environmental deterioration.We found that this sludge has an effect of absorbing low concentrations of phosphorus in water.For the purpos...Large amounts of sludge has accumulated in the Inner Bay,which is one factor of environmental deterioration.We found that this sludge has an effect of absorbing low concentrations of phosphorus in water.For the purpose of development of water treatment agents and effective utilization of the sludge,phosphorus removal performance was investigated using wet sludge collected in Ise-Bay.A small amount of sludge was added to the test water having a phosphorus concentration of about 1~2 mg/L,and the phosphorus concentration of the filtrate after stirring and filtration was measured.Depending on the sludge conditions,it showed 30% to 80% of phosphorus removal performance.We investigated the relationship between the physical properties of the sludge and the removal performance.展开更多
文摘Calcium-based compounds are used as fluorine removal treatment materials in water.However,due to the water solubility of calcium fluoride,there is a problem with low fluorine removal performance.For this reason,various removing agents including phosphorus have been developed.We have found that a combination of aluminum phosphate recovered from incinerated ash of the sewage sludge and refuse incineration ash has a high fluorine removal performance.At the highest removal performance,F ion concentration of the treated water reached 0.1 mg/L,so an optimal formulation method was investigated.
基金The authors wish to express their appreciation to Dr.Eric Bray(Professor of Yokkaichi University)for his advice on making the article.The authors also express their appreciation to the Hinaga Wastewater Treatment Center(Yokkaichi City Government,Waterworks and Sewage Bureau)offering us the ash.
文摘The compounds of aluminum phosphate are used to remove the fluorine compounds from wastewater. The fluorine removal agent using the ash of sewage sludge and the municipal waste in addition to sulfuric acid were investigated. The removal agent showed high removal performance, and the fluorine concentration of the treated water reached below 0.1 mg/L, and the noticeable elution of the harmful metals from the ashes were not found in this experiment.
文摘Large amounts of sludge has accumulated in the Inner Bay,which is one factor of environmental deterioration.We found that this sludge has an effect of absorbing low concentrations of phosphorus in water.For the purpose of development of water treatment agents and effective utilization of the sludge,phosphorus removal performance was investigated using wet sludge collected in Ise-Bay.A small amount of sludge was added to the test water having a phosphorus concentration of about 1~2 mg/L,and the phosphorus concentration of the filtrate after stirring and filtration was measured.Depending on the sludge conditions,it showed 30% to 80% of phosphorus removal performance.We investigated the relationship between the physical properties of the sludge and the removal performance.
