Archives

  • Archives
  • >
  • Home

DOI : ,    Vol.21, No.1, 55 ~ 63, 2013
Title
Study on the Two Stage Direct Filtration System using Floating Medium for Total Phosphorus Removel
우달식 Dal Sik Woo , 신성훈 Sung Hoon Sin , 채수권 Su Kwen Chae , 정종태 Jong Tae Jung , 조용현 Young Hyun Cho , 한상윤 Sang Yun Han , 김희영 Hee Young Kim
Abstract
Wastewater treatment plants are required to meet the enhanced discharge standards which are differentiated by 0.2, 0.3 and O.5mgT-P/L for the district I, II and III, respectively. Thus, this study was performed whether the two stage direct filtration system combined process of inline mixer process and upflow two stage filter process with floating filter medium was an efficient treatment method for total phosphorus removal from secondary sewage effluent. In the two stage direct filtration experiments, coagulants including aluminum sulphate (alum), polyaluminium chloride (PACI), polyaluminum silicate chloride-2 (PACS-2) ferric chloride (FeCl3) were injected to study the optimum condition for the P04-P removal by jar test. The maximal T-P removal efficiency was achieved for 2.5~3.0 AI (Fe)/P mole ratio and pH 6.0-6.5. Based on the two stage direct filtration experiments, it can be concluded that PACI and FeCl3 were found as an efficient coagulant for the total phosphorus removal and better flocculation. The operation of the two stage direct filtration system at filtration rate of 600m/day could achieve satisfied T-P removal.
Key Words
total phosphorus removal, two stage direct filtration, floating filter medium, congulant, filtration rate
pdf view PDF