-
1.
公开(公告)号:US3847806A
公开(公告)日:1974-11-12
申请号:US33913273
申请日:1973-03-08
Applicant: AGENCY IND SCIENCE TECHN
Inventor: KUROIWA T , HIOKI M , NOGUCHI H , ABE E , KIMURA K , KAMINO T , JINNAI K , ISAYAMA Y , YOKOTA A
CPC classification number: C04B20/068 , B01D37/00 , B01D37/02 , C02F11/008 , C02F11/12 , C04B18/0418 , Y02W30/91 , C04B14/14 , C04B18/04
Abstract: This invention relates to a method for effectively treating sludge formed in city sewer systems. More particularly, this invention relates to a method for obtaining lightweight foamed materials useful as fillers which comprises adding, on filtration of sludge formed in the purification treatment of city sewers, foaming granular volcanic ash deposits to the sludge to facilitate the filtration treatment and utilizing the filtration residue as a lightweight foamed material.
Abstract translation: 本发明涉及一种有效处理城市下水道系统中形成的污泥的方法。 更具体地说,本发明涉及一种获得用作填料的轻质泡沫材料的方法,该方法包括在对下水道净化处理中形成的污泥进行过滤时,将发泡的颗粒状火山灰沉积物加入到污泥中,以促进过滤处理和利用 过滤残渣作为轻质泡沫材料。