The invention relates to a slow sand filter comprising in the embodiment a layer of granular activated carbon (3) sandwiched between two layers (4) and (5) of sand.
申请公布号
WO9413381(A1)
申请公布日期
1994.06.23
申请号
WO1993GB02511
申请日期
1993.12.08
申请人
THAMES WATER UTILITIES LIMITED;FOSTER, DAVID;SANDERS, TREVOR
