The phosphorus recovery from the incinerated ash using NaOH by the heat treatment,was investigated.In this method,non-reacted NaOH containing alkali water was generated with the phosphorus recovery.In order to find ou...The phosphorus recovery from the incinerated ash using NaOH by the heat treatment,was investigated.In this method,non-reacted NaOH containing alkali water was generated with the phosphorus recovery.In order to find out the best method for reuse of the alkali water,the alkali water was mixed with new reagent of NaOH,and the phosphorus recovery was carried out.The phosphorus was recovered as a sodium phosphate,and the recovery rate was almost the same even with the reuse of the alkali water.展开更多
In order to recover the phosphorus from the waste water sludge,the dehydrated sludge was mixed with the reagent of NaOH,KOH or Na2CO3,and incinerated at 750℃ or 900℃.Phosphorus in the incinerated ash of the sludge w...In order to recover the phosphorus from the waste water sludge,the dehydrated sludge was mixed with the reagent of NaOH,KOH or Na2CO3,and incinerated at 750℃ or 900℃.Phosphorus in the incinerated ash of the sludge was dissolved by the addition of water,and recovered by the evaporation of the phosphorus resolved water.The recovered phosphorus was confirmed to be an alkali metal phosphate,and the recovery rate reached about 75%regardless any combination of the reagents(NaOH,KOH or Na2CO3).展开更多
文摘The phosphorus recovery from the incinerated ash using NaOH by the heat treatment,was investigated.In this method,non-reacted NaOH containing alkali water was generated with the phosphorus recovery.In order to find out the best method for reuse of the alkali water,the alkali water was mixed with new reagent of NaOH,and the phosphorus recovery was carried out.The phosphorus was recovered as a sodium phosphate,and the recovery rate was almost the same even with the reuse of the alkali water.
文摘In order to recover the phosphorus from the waste water sludge,the dehydrated sludge was mixed with the reagent of NaOH,KOH or Na2CO3,and incinerated at 750℃ or 900℃.Phosphorus in the incinerated ash of the sludge was dissolved by the addition of water,and recovered by the evaporation of the phosphorus resolved water.The recovered phosphorus was confirmed to be an alkali metal phosphate,and the recovery rate reached about 75%regardless any combination of the reagents(NaOH,KOH or Na2CO3).