title: Analysis of up-flow aerated biological activated carbon filter technology in drinking water treatment.
abstract: Problems have been found in the traditional post-positioned down-flow biological activated carbon filter (DBACF), such as microorganism leakage and low biodegradability. A pilot test was carried out to place a BACF between the sediment tank and the sand filter; a new technology of dual media up-flow aerated biological activated carbon filter (UBACF) was developed. Results showed that in terms of the new process, the up-flow mode was better than the down-flow. Compared with the DBACF, the problem of microorganism leakage could be well resolved with the UBACF process by adding disinfectant before the sand filtration, and a similar adsorption effect could be obtained. For the tested raw water, the COD(Mn) and NH3-N removal rate was 54.6% and 85.0%, respectively, similar to the waterworks with the DBACF process. The UBACF greatly enhanced oxygen supply capability and mass transfer rate via aeration, and the NH3-N removal ability was significantly improved from 1.5 mg/L to more than 3 mg/L. Influent to the UBACF with higher turbidity could be coped with through the primary filtration of the ceramisite layer combined with fluid-bed technology, which gave the carbon bed a low-turbidity environment of less than 1.0 NTU. The backwashing parameters and carbon abrasion rate of the two processes were almost the same.
authors.affiliation: College of Environmental Science & Engineering, South China University of Technology, Guangzhou, China.
authors.forename: Shaoming
authors.initials: S
authors.lastname: Lu
authors.affiliation: College of Environmental Science & Engineering, South China University of Technology, Guangzhou, China.
authors.forename: Jincui
authors.initials: J
authors.lastname: Liu
authors.affiliation: College of Environmental Science & Engineering, South China University of Technology, Guangzhou, China.
authors.forename: Shaowen
authors.initials: S
authors.lastname: Li
authors.affiliation: College of Environmental Science & Engineering, South China University of Technology, Guangzhou, China.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Biney
mesh_terms: D064751:Ammonium Compounds / Q000737:chemistry; D057919:Biological Oxygen Demand Analysis; D002244:Carbon / Q000737:chemistry*; D060766:Drinking Water / Q000032:analysis* / Q000737:chemistry / Q000382:microbiology; D005374:Filtration / Q000379:methods*; D062065:Wastewater / Q000032:analysis / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D064751:Ammonium Compounds; D002244:Carbon; D060766:Drinking Water; D062065:Wastewater