title: Integrating photobiological hydrogen production with dye-metal bioremoval from simulated textile wastewater.
abstract: The study reports production of hydrogen in photobioreactors with free (PBR(Fr)) and immobilized (PBR(Imm)) Nostoc biomass at enhanced and sustained rates. Before running the photobioreactors, effects of different immobilization matrices and cyanobacterial dose on hydrogen production were studied in batch mode. As hydrogen production in the PBRs declined spent biomass from the photobioreactors were collected and utilized further for column biosorption of highly toxic dyes (Reactive Red 198+Crystal Violet) and metals (hexavalent chromium and bivalent cobalt) from simulated textile wastewater. Breakthrough time, adsorption capacity and exhaustion time of the biosorption column were studied. The photobioreactors with free and immobilized cyanobacterium produced hydrogen at average rates of 101 and 151 μmol/h/mg Chl a, respectively over 15 days, while the adsorption capacity of the spent biomass was up to 1.4 and 0.23 mg/g for metals and 15 and 1.75 mg/g for the dyes, respectively in continuous column mode.
authors: Department of Environmental Science and Engineering, Guru Jambheshwar University of Science & Technology, Hisar 125001, India.
authors: Anubha
authors: A
authors: Kaushik
authors: Sharma
authors: S
authors: Mona
authors: C P
authors: CP
authors: Kaushik
mesh_terms: D000327:Adsorption / Q000187:drug effects; D000464:Alginates / Q000494:pharmacology; D001673:Biodegradation, Environmental / Q000187:drug effects; D018533:Biomass; D018914:Cells, Immobilized / Q000166:cytology / Q000187:drug effects; D004396:Coloring Agents / Q000302:isolation & purification*; D020723:Glucuronic Acid / Q000494:pharmacology; D006603:Hexuronic Acids / Q000494:pharmacology; D006859:Hydrogen / Q000378:metabolism*; D006864:Hydrogenase / Q000378:metabolism; D008670:Metals / Q000302:isolation & purification*; D008863:Microspheres; D046937:Nostoc / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D018462:Photobiology / Q000295:instrumentation / Q000379:methods*; D058433:Photobioreactors / Q000382:microbiology; D013784:Textiles; D013997:Time Factors; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000464:Alginates; D004396:Coloring Agents; D006603:Hexuronic Acids; D008670:Metals; D014874:Water Pollutants, Chemical; D006859:Hydrogen; D020723:Glucuronic Acid; D006864:Hydrogenase