title: [The application of polyferric chloride in micro-flocculation deep bed filtration].
abstract: Compared with polyaluminium chloride (PAC), the application efficiency of polyferric chloride (PFC) were investigated by pilot micro-flocculation deep bed filtration. The results show that, under the condition of lower dosage (Fe:Al = 3:5), the headloss cycle of PFC was 63 h, and its output in a cycle was 1504 m3/m2, but PAC headloss cycle was 53 h with its output 1266 m3/m2. It is concluded that PFC was benefit to prolong operation cycle and improve output. The research on particle removal mechanism shows that PFC could enhance the floc growth, and the PFC flocs could be effectively entrapped and dehydrated. Therefore PFC is more suitable for the micro-flocculation deep bed filtration process than PAC.
authors.affiliation: SKLEAC, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing 100085, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Meng
authors.forename: Guiping
authors.initials: G
authors.lastname: Li
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Wang
authors.forename: Jinglong
authors.initials: J
authors.lastname: Guo
authors.forename: Zhaokun
authors.initials: Z
authors.lastname: Luan
authors.forename: Hongxiao
authors.initials: H
authors.lastname: Tang
mesh_terms: D000077410:Aluminum Chloride; D017607:Aluminum Compounds; D002712:Chlorides; D005290:Ferric Compounds / Q000737:chemistry*; D005374:Filtration; D005427:Flocculation; D011108:Polymers / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D017607:Aluminum Compounds; D002712:Chlorides; D005290:Ferric Compounds; D011108:Polymers; D000077410:Aluminum Chloride; C024555:ferric chloride