Degradation of phenol under meso- and thermophilic, anaerobic conditions

Karlsson, Anna; Ejlertsson, Jörgen; Nezirevic, Dzeneta; Svensson, Bo

doi:10.1006/anae.1998.0187

Cited by 62 publications

(43 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Serum bottle enrichments were done in series of batch incubations at 358C. The medium used, containing 5 g L À1 glucose, was according to Zehnder et al (1980) with modifications by Karlsson et al (1999) and Ejlertsson et al (1996). In addition, 2-bromoethanesulfonic acid (BESA) (20 mM in the first, 10 mM in the second and 1 mM in the subsequent incubations) was used to inhibit methanogens (Sparling and Daniels, 1987).…”

Section: Methodsmentioning

confidence: 99%

The relationship between instability of H₂ production and compositions of bacterial communities within a dark fermentation fluidised‐bed bioreactor

Koskinen

Kaksonen

Puhakka

2007

Biotech & Bioengineering

124

View full text Add to dashboard Cite

Microbial community composition dynamics was studied during H(2) fermentation from glucose in a fluidized-bed bioreactor (FBR) aiming at obtaining insight into the H(2) fermentation microbiology and factors resulting in the instability of biofilm processes. FBR H(2) production performance was characterised by an instable pattern of prompt onset of H(2) production followed by rapid decrease. Gradual enrichment of organisms increased the diversity of FBR attached and suspended-growth phase bacterial communities during the operation. FBR bacteria included potential H(2) producers, H(2) consumers and neither H(2) producers nor consumers, and those distantly related to any known organisms. The prompt onset of H(2) production was due to rapid growth of Clostridium butyricum (99-100%) affiliated strains after starting continuous feed. The proportion trend of C. butyricum in FBR attached and suspended-growth phase communities coincided with H(2) and butyrate production. High glucose loading rate favoured the H(2) production by Escherichia coli (100%) affiliated strain. Decrease in H(2) production, associated with a shift from acetate-butyrate to acetate-propionate production, was due to changes in FBR attached and suspended-growth phase bacterial community compositions. During the shift, organisms, including potential propionate producers, were enriched in the communities while the proportion trend of C. butyricum decreased. We suggest that the instability of H(2) fermentation in biofilm reactors is due to enrichment and efficient adhesion of H(2) consumers on the carrier and, therefore, biofilm reactors may not favour mesophilic H(2) fermentation.

show abstract

Section: Methodsmentioning

confidence: 99%

The relationship between instability of H₂ production and compositions of bacterial communities within a dark fermentation fluidised‐bed bioreactor

Koskinen

Kaksonen

Puhakka

2007

Biotech & Bioengineering

124

View full text Add to dashboard Cite

show abstract

“…Samples for methane analysis were taken from the gas phase before adjusting the pressure in each bottle to ambient. The methane content of the headspace gas was determined by gas chromatography with a flame ionization detection (GC-FID; [15]). Gas was sampled at 37°C and the gas released was accounted for when calculating the methane yields.…”

Section: Analyzed Parametersmentioning

confidence: 99%

Methane potentials of the Swedish pulp and paper industry – A screening of wastewater effluents

et al. 2013

Self Cite

View full text Add to dashboard Cite

With the final aim of reducing the energy consumption and increase the methane production at Swedish pulp and paper mills, the methane potential of 62 wastewater effluents from ten processes at seven pulp and/or paper mills (A-G) was determined in anaerobic batch digestion assays. This mapping is a first step towards an energy efficient and more sustainable utilization of the effluents by anaerobic digestion, and will be followed up by tests in lab-scale and pilot-scale reactors. Five of the mills produce kraft pulp (KP), one thermo-mechanical pulp (TMP), two chemical thermo-mechanical pulp (CTMP) and two neutral sulfite semichemical (NSSC) pulp. Both elemental and total chlorine free (ECF and TCF, respectively) bleaching processes were included. The effluents included material from wood rooms, cooking and oxygen delignification, bleaching (often both acid-and alkali effluents), drying and paper/board machinery as well as total effluents before and after sedimentation.The results from the screening showed a large variation in methane yields (percent of theoretical methane potential assuming 940 NmL CH 4 per g TOC) among the effluents. For the KP-mills, methane yields above 50% were obtained for the cooking effluents from mills D and F, paper machine wastewater from mill D, condensate streams from mills B, E and F and the composite pre-sedimentation effluent from mill D. The acidic ECF-effluents were shown to be the most toxic to the AD-flora and also seemed to have a negative effect on the yields of composite effluents downstream while three of the alkaline ECF-bleaching effluents gave positive methane yields. ECF bleaching streams gave higher methane yields when hardwood was processed. All TCF-bleaching effluents at the KP mills gave similar degradation patterns with final yields of 10-15% of the theoretical methane potential for four of the five effluents. The composite effluents from the two NSSC-processes gave methane yields of 60% of the theoretical potential.The TMP mill (A) gave the best average yield with all 6 effluents ranging 40-65% of the theoretical potential. The three samples from the CTMP process at mill B showed potentials around 40% while three of the six effluents at mill G (CTMP) yielded 45-50%.

show abstract

“…The methane content of the headspace gas was determined by gas chromatography [14]. Gas was sampled at 37°C and the gas released was accounted for when calculating the methane potentials.…”

Section: Analysed Parametersmentioning

confidence: 99%

Anaerobic treatment of activated sludge from Swedish pulp and paper mills – biogas production potential and limitations

Karlsson

Truong

Gustavsson

et al. 2011

Environmental Technology

Self Cite

View full text Add to dashboard Cite

Degradation of phenol under meso- and thermophilic, anaerobic conditions

Cited by 62 publications

References 27 publications

The relationship between instability of H₂ production and compositions of bacterial communities within a dark fermentation fluidised‐bed bioreactor

The relationship between instability of H₂ production and compositions of bacterial communities within a dark fermentation fluidised‐bed bioreactor

Methane potentials of the Swedish pulp and paper industry – A screening of wastewater effluents

Anaerobic treatment of activated sludge from Swedish pulp and paper mills – biogas production potential and limitations

Contact Info

Product

Resources

About

Degradation of phenol under meso- and thermophilic, anaerobic conditions

Cited by 62 publications

References 27 publications

The relationship between instability of H2 production and compositions of bacterial communities within a dark fermentation fluidised‐bed bioreactor

The relationship between instability of H2 production and compositions of bacterial communities within a dark fermentation fluidised‐bed bioreactor

Methane potentials of the Swedish pulp and paper industry – A screening of wastewater effluents

Anaerobic treatment of activated sludge from Swedish pulp and paper mills – biogas production potential and limitations

Contact Info

Product

Resources

About

The relationship between instability of H₂ production and compositions of bacterial communities within a dark fermentation fluidised‐bed bioreactor

The relationship between instability of H₂ production and compositions of bacterial communities within a dark fermentation fluidised‐bed bioreactor