Salinity footprint on anoxic-aerobic sequential moving bed reactors during petroleum refinery wastewater treatment: Effects on the dominant species. (October 2020)

• Record Type: Journal Article
• Authors: Mallick, Subrat Kumar; Chakraborty, Saswati
• Is Part Of: Journal of water process engineering. Volume 37(2020)
• Publication Date: 2020-10
• Subjects: % Percentage -- A1 Anoxic disc bed reactor -- A2 Aerobic moving bed reactor -- CA Chemolithotrophic activity -- CH4 Methane -- CO2 Carbon dioxide -- COD Chemical oxygen demand -- CODT Total COD -- CODO Organic COD -- DO Dissolved oxygen -- HA Heterotrophic activity -- H2S Hydrogen sulfide -- HRT Hydraulic retention time -- IOCL Indian oil corporation limited -- n Number of moles -- N2 Nitrogen -- NaCl Sodium chloride -- Na2S Sodium sulfide -- NH4+-N Ammonia-N -- NO3−-N Nitrate-N -- NO2−-N Nitrite-N -- P Atmospheric pressure -- R Ideal gas constant -- S2- Sulfide -- S0 Influent pollutant concentration -- Se Effluent pollutant concentration -- SO42- Sulfate -- S2O32- Thiosulfate -- SRT Solids retention time -- T Absolute temperature -- TDS Total dissolved solids -- TH Total hydrocarbon -- V Volume -- VS Volatile solids; Salinity -- Anoxic-aerobic sequential reactors -- Petroleum refinery wastewater -- Biomass activity; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2020.101376
• Languages: English
• ISSNs: 2214-7144

Abstract

Graphical abstract: Highlights: Organics removal deteriorated with increase in NaCl in anoxic reactor. Sulfide removal remained intact in anoxic reactor. Organics and NH4+-N removal decreased beyond 30 g/L of NaCl in aerobic reactor. Pseudomonas aeruginosa SC2013 tolerated salinity in anoxic biomass. Lysinibacillus sp. H200-150 tolerated salinity in aerobic biomass. Abstract: Consequence of increased NaCl (0−45 g/L) on the performance of anoxic (A1) - aerobic (A2) sequential moving bed reactors operated in series was examined while treating synthetic petroleum refinery wastewater. Influent wastewater was a concoction of phenol (750 mg/L), S 2− (750 mg/L), crude oil (300 mg/L), NO3 --N (1000 mg/L), NH4 + -N (350 mg/L) and emulsifier (0.2 mM) along with varied NaCl. Removal of organics deteriorated in A1 (60 h HRT) with rise in NaCl and complete removal of residual organics and NH4 + -N was achieved in A2 (20 h HRT) up to 30 g/L of NaCl at total 80 h HRT. Effect of salinity was never observed for S 2− removal in A1. Increase in sloughing, decrease in SRT and biomass activity were the outcomes of increased NaCl. Pseudomonas aeruginosa SC2013 and Lysinibacillus sp. H200−150 tolerated higher salinity in A1 and A2, respectively. Complete restoration of the reactor performance was achieved after withdrawal of NaCl.