Journal ArticleDOI
Bioaugmentation and anaerobic treatment of pharmaceutical effluent in fluidized bed reactor.
TLDR
The start-up of an anaerobic fluidized bed reactor was carried out using a single inoculum and later on with multiple inoculum to achieve a faster start- up and the effect of hydraulic retention time (HRT) on COD removal (%) and biogas production was studied.Abstract:
The start-up of an anaerobic fluidized bed reactor was carried out using a single inoculum (supernatant of anaerobic digester) and later on with multiple inoculum (a mixture of supernatant of anaerobic digester and volatile fatty acid (VFA)) to achieve a faster start-up. Then regular experiments were carried out to study the effect of hydraulic retention time (HRT) on COD removal (%) and biogas production. The pharmaceutical effluent with COD of 2000 to 4000 mg/L was treated in a fluidized bed reactor using an enricher-reactor concept with a hydraulic retention times of 3 (Uf = 6 Umf) to 24 (Uf = 1.5 Umf) hr. The maximum COD removal (%) of 91.2 and a maximum biogas production of 5.62 L/d were obtained at 24 hr HRT for a maximum COD concentration of 4000 mg/L corresponding to a fluidization velocity (Uf) of 20 m/hr (1.5 Umf) using a granular activated carbon bed of average size 700 microns.read more
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Book ChapterDOI
Industry-Specific Water Treatment: Case Studies
TL;DR: An extensive list of the various methods of removal of cyanide, phenol, ammonia, and chemical oxygen demand from coke wastewater is given along with the key advancements of the application of membrane.
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Influence of the food to microorganisms (F/M) ratio and temperature on batch anaerobic digestion processes with and without zeolite addition.
TL;DR: The main objective of this work was to evaluate the influence of the food to microorganisms (F/M) ratio and temperature on batch anaerobic digestion processes carried out with and without zeolite addition as a microbial carrier, and fit the experimental results to simple kinetic models, the Monod model being the most adequate for predicting the behavior of the systems studied.
Journal ArticleDOI
Bioengineering options and strategies for the optimization of anaerobic digestion processes
TL;DR: Next generation sequencing technologies, such as 454-pyrosequencing, with other techniques,such as phospholipid-derived fatty acids analysis, can provide a holistic understanding of the microbial community and aid environmental ecologists and engineers to better understand and optimize the AD process.
References
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Journal ArticleDOI
Anaerobic Oxidation of Toluene, Phenol, and p-Cresol by the Dissimilatory Iron-Reducing Organism, GS-15
TL;DR: The metabolism of toluene, phenol, and p-cresol by GS-15 provides a model for how aromatic hydrocarbons and phenols may be oxidized with the reduction of Fe(III) in contaminated aquifers and petroleum-containing sediments.
Journal ArticleDOI
Anaerobic degradation of phenol by pure cultures of newly isolated denitrifying pseudomonads.
Andreas Tschech,Georg Fuchs +1 more
TL;DR: Preliminary evidence is presented that the first reaction in anaerobic phenol oxidation is phenol carboxylation to 4-hydroxybenzoate.
Journal ArticleDOI
The anaerobic biodegradation of o-, m- and p-cresol by sulfate-reducing bacterial enrichment cultures obtained from a shallow anoxic aquifer
TL;DR: The stoichiometry of sulfate-reduction and substrate depletion by the various enrichment cultures indicated that the parent cresol isomers were completely mineralized, which helps clarify the fate of alkylated aromatic chemicals in anoxic aquifers.
Journal ArticleDOI
CO2 incorporation and 4-hydroxy-2-methylbenzoic acid formation during anaerobic metabolism of m-cresol by a methanogenic consortium.
TL;DR: Results suggested that CO(2) incorporation occurred because each molecule of m-cresol contained seven carbon atoms, whereas four molecules of acetate product contained a total of eight carbon atoms.
Journal ArticleDOI
Anaerobic degradation of m-cresol in anoxic aquifer slurries: carboxylation reactions in a sulfate-reducing bacterial enrichment.
K. Ramanand,Joseph M. Suflita +1 more
TL;DR: In this article, anaerobic biodegradation of m-cresol was observed in anoxic aquifer slurries kept under both sulfate-reducing and nitrate reducing but not methanogenic conditions.