Hydrogen production and metal-dye bioremoval by a Nostoc linckia strain isolated from textile mill oxidation pond.
Biohydrogen production by Nostoc linckia HA-46, isolated from a textile-industry oxidation-pond was studied by varying light/dark period, pH, temperature and ratio of carbon-dioxide and argon in the gas-mixture. Hydrogen production rates were maximum under 18 h of light and 6 h of darkness, pH 8.0, 31°C, a CO(2):Ar ratio 2:10. Hydrogen production of the strain acclimatized to 20 mg/L of chromium/cobalt and 100 mg/L of Reactive red 198/crystal violet dye studied in N-supplemented/deficient medium was 6-10% higher in the presence of 1.5 g/L of NaNO(3). Rates of hydrogen production in the presence of dyes/metals by the strain (93-105 μmol/h/mg Chlorophyll) were significantly higher than in medium without metals/dyes serving as control (91.3 μmol/h/mg Chlorophyll). About 58-60% of the two metals and 35-73% of dyes were removed by cyanobacterium. Optimal conditions of temperature, pH and metals/dyes concentration for achieving high hydrogen production and wastewater treatment were found practically applicable as similar conditions are found in the effluent of regional textile-mills.
Department of Environmental Science and Engineering, Guru Jambheshwar University of Science & Technology, Hisar, India.
Sharma
S
Mona
Anubha
A
Kaushik
C P
CP
Kaushik
D001673:Biodegradation, Environmental; D056804:Biofuels; D004396:Coloring Agents / Q000378:metabolism*; D005618:Fresh Water / Q000382:microbiology*; D006859:Hydrogen / Q000378:metabolism*; D008670:Metals / Q000378:metabolism*; D046937:Nostoc / Q000378:metabolism*; D010084:Oxidation-Reduction; D013783:Textile Industry; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods
D056804:Biofuels; D004396:Coloring Agents; D008670:Metals; D014874:Water Pollutants, Chemical; D006859:Hydrogen