Characterisation and removal of recalcitrants in reverse osmosis concentrates from water reclamation plants

Removal of Total Dissolved Solids from Reverse Osmosis Concentrates from a Municipal Wastewater Reclamation Plant by Aerobic Granular Sludge

“…Conventional treatment processes, such as coagulation/flocculation and adsorption, have been widely investigated for removing EfOM from ROC due to their low cost and simplicity [16,17]. Dialynas et al [18] evaluated these conventional processes using alum (Al 2 (SO 4 ) 3 ·18H 2 O), ferric chloride (FeCl 3 ), and granular activated carbon (GAC) for the treatment of ROC of membrane bioreactor (MBR) effluent.…”

“…Their results suggested that GAC and ferric chloride were promising as coagulants as their removal efficiencies of dissolved organic carbon (DOC) were higher (91.3% and 52%, respectively) than the alum tested (42%) [19]. Bagastyo et al [16] reported that iron removed a wider molecular weight (MW) range of organics in ROC from coastal and inland streams than alum under optimal coagulation conditions (1.5 mM Al at pH 5 and 1.48 mM Fe at pH 5). Zhou et al [17] found that coupling pretreatment with ferric chloride could remove a large quantity of heavy MW organics from ROC that are highly resistant to the subsequent advanced oxidation process (95% removal by the FeCl 3 /UVC/TiO 2 system).…”

Efficient ozonation of reverse osmosis concentrates from petroleum refinery wastewater using composite metal oxide-loaded alumina

“…The organics in ROC generated from PRW reclamation (PRW-ROC) need to be reduced to eliminate these negative impacts and to meet increasingly stringent discharge standards (Moreira et al 2017). Previous work has already investigated the use of physicochemical and biological treatments; however, low concentrations and biologically recalcitrant organic matter suggest these methods are unsuitable (Bagastyo et al 2013).…”

Elucidation of mesopore-organic molecules interactions in mesoporous TiO2 photocatalysts to improve photocatalytic activity

“…The organic contaminants in municipal RO effluents include natural organic matters (NOM), detergents, personal care products, pharmaceuticals, and so on [4]. AOPs include photooxidation, sonolysis, electrooxidation, Fenton's reaction, and photocatalysis [1,[4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Photooxidation and Fenton's reaction were reported to have relative medium to high costs of chemical consumables.…”