4U.S.Environmental Protection Agency National Primary Drinking Water Regulations:Filter Backwash recycling rule;Final Rule(40 CFR Parts9,141,and 142).Fed.Reg.2001,(Part Ⅳ)66(111):31086 ～ 31105.
5Cornwell D.,Lee R.Waste stream recycling:Its effect on water quality.AWWA,1994,86 (11):50 ～ 63.
6Panagiotis Karanis,Dirk Schoenen and Seitz H.M.Distribution and removal giardia and cyptosporidium in water supplies in Germany.Water Science and Technology,1998,37(2):9 ～ 18.
7Carision K.H.,Bellamy W.H.Use of a mass balance model for developing guidelines for treatment plant recycle streams.Water Science and Technology:Water Supply,2001,1 (4):169 ～ 176.
8Edzwald J.K.,Tobiason J.E.,Udden C.T.,et al.Evaluation of the effect of recycle of waste filter backwash water on plant removals of cryptosporidium.Water Supply:Research and Technology-AQUA,2003,52 (4):243 ～ 258.
9Bourgeois J.C.,Walsh M.E.,Gagnon G.A.Treatment of drinking water residuals comparing sedimentation and dissolved air flotation performance with optimal cation ratios.Water Research,2004,38:1173 ～ 1182.
10David A.Cornwell,Michael J.MacPhee.Effects of spent filter backwash recycle on cryptosporidium removal.AWWA,2001,93 (4):153 ～ 162.
