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Simultaneous biological removal of nitrogen, carbon and sulfur by denitrification.
The results indicated that denitrification is a feasible process for the simultaneous removal of nitrogen, carbon and sulfur from effluents of the petroleum industry. Expand
Chemolithotrophic denitrification with elemental sulfur for groundwater treatment.
Comparison of bioreactor results with batch kinetic studies revealed that denitrification rates were dependent on the surface area of the added S0, which was determined to be 26.4 mmol /(m2 S0 d). Expand
Toxicity of N-substituted aromatics to acetoclastic methanogenic activity in granular sludge
It was observed that at any given log P, N-substituted phenols had a toxicity that was 2 orders of magnitude higher than that of chlorophenols and alkylphenols, which indicates that toxicity due to the chemical reactivity of nitroaromatics is much more important than partitioning effects in bacterial membranes. Expand
Hydrogen sulfide oxidation by a microbial consortium in a recirculation reactor system: sulfur formation under oxygen limitation and removal of phenols.
Microcosm experiments showed that carbon dioxide production increased in the presence of the phenols, suggesting that these compounds were oxidized and that they may have been used as carbon and energy source by heterotrophic microorganisms present in the consortium. Expand
Biodegradation of selected azo dyes under methanogenic conditions
Biological treatment of wastewaters discharged by the textile industry could potentially be problematic due to the high toxicity and recalcitrance of the commonly-used azo dye compounds. In theExpand
Fermentative hydrogen production in batch experiments using lactose, cheese whey and glucose: Influence of initial substrate concentration and pH
Abstract Biologically produced hydrogen using biomass and mixed bacterial cultures is one approach to generate renewable H 2 . Response surface methodology (RSM) was used to study the effect ofExpand
Fermentative biohydrogen production: trends and perspectives
Biologically produced hydrogen (biohydrogen) is a valuable gas that is seen as a future energy carrier, since its utilization via combustion or fuel cells produces pure water. HeterotrophicExpand
Detoxification and partial mineralization of the azo dye mordant orange 1 in a continuous upflow anaerobic sludge-blanket reactor
Abstract In batch toxicity assays, azo dye compounds were found to be many times more toxic than their cleavage products (aromatic amines) towards methanogenic activity in anaerobic granular sludge.Expand
Precipitation and recovery of metal sulfides from metal containing acidic wastewater in a sulfidogenic down‐flow fluidized bed reactor
This study is the first in reporting the feasibility to recover metal sulfides separated from the biomass in a sulfate reducing process in one stage, and the metals precipitation efficiencies obtained for Fe, Zn, and Cd exceeded 99.7%, 99.3%, and 99.4%, respectively. Expand
Performance of a down‐flow fluidized bed reactor under sulfate reduction conditions using volatile fatty acids as electron donors
Results demonstrated that the configuration of the DFFB reactor was suitable for the anaerobic treatment of sulfate‐rich wastewater, and methanogenesis was the predominant process. Expand