Hybrid SBR–FO system for wastewater treatment and reuse: Operation, fouling and cleaning
作者： Rodrigo Valladares Linares , Zhenyu Li , Victor Yangali-Quintanilla , Qingyu Li , Johannes S. Vrouwenvelder
DOI: 10.1016/J.DESAL.2016.03.015
关键词:
摘要: Abstract Forward osmosis (FO) is a novel membrane separation process that potentially can be used as an energy-saving alternative to conventional processes. A hybrid sequential batch reactor (SBR)–FO was explored. In this system, plate and frame FO cell including two flat-sheet membranes submerged in bioreactor treating synthetic domestic wastewater. The dissolved organic carbon (DOC) removal efficiency of the system 98.55%. Total nitrogen 62.4%, with nitrate, nitrite ammonium removals 58.4%, 96.2% 88.4%, respectively. Phosphate almost 100%. 15-hour cycle average water flux virgin air scouring 2.95 L/m 2 ·h − 1 . Air help remove loose foulants from active layer, thus helping recover up 89.5% original flux. Chemical cleaning fouled layer not effective scouring. Natural matter (NOM) characterization methods (liquid chromatography–organic detection (LC–OCD) 3-D fluorescence excitation emission matrix (FEEM)) show has very good performance rejecting biopolymers, humics building blocks, but limited ability low molecular weight neutrals. Transparent exopolymer particles (TEP) other biopolymers might associated fouling on support layer. 1% sodium hypochlorite (NaOCl) solution proved for removing recovering
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