会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明专利
    • METHOD FOR TREATING ASH CONTAINING HEAVY METALS OR THE LIKE
    • JP2002001273A
    • 2002-01-08
    • JP2001115471
    • 2001-04-13
    • KUBOTA KANKYO SERVICE KKSHIMIZU YOJI
    • KOIDE NORIHIROHAYASHI MASAKISHIMIZU YOJIUENO KOJI
    • B09B3/00
    • PROBLEM TO BE SOLVED: To insolubilize heavy metals such as arsenic, selenium or the like in incineration ash of sewage sludge simply and efficiently at a low cost. SOLUTION: Especially, in the treatment of incineration ash of sewage sludge, heavy metals such as arsenic, selenium or the like contained in raw incineration ash are insolubilized by performing either one of a treatment process (1) wherein a ferric sulfate solution is added to and mixed with the incineration ash and the resulting mixture is heat-treated, a treatment process (2) wherein the ferric sulfate solution is added to and mixed with the incineration ash and the resulting mixture is allowed L stand to be heat-treated, a treatment process (3) wherein a solution of ammonium sulfate or ammonium sulfate and ammonia is added to and mixed with the incineration ash and the resulting mixture is heat-treated and the ferric sulfate solution is further added to and mixed with the treated mixture and the whole is heat-treated, a treatment process (4) wherein the solution of ammonium sulfate or ammonium sulfate and ammonia is added to and mixed with the incineration ash and the resulting mixture is heat-treated and the ferric sulfate solution is further added to and mixed with the treated mixture and the whole is allowed to stand to be heattreated and a treatment process (5) wherein the pH control agent is added to the matter obtained after the treatment processes (1)-(4), corresponding to the properties of the incineration ash.