Influence of adsorption and anaerobic granular sludge characteristics on long chain fatty acids inhibition process

Palatsí, J.; Affes, Rim; Fernández, Belén; Pereira, M. A.; Alves, M. M.; Flotats, Xavier

doi:10.1016/j.watres.2012.07.008

Cited by 67 publications

(55 citation statements)

References 30 publications

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“…Two experiments were established based on incubations of 22:6n-3 with mixed rumen bacteria without or with one of four adsorbants (bentonite, silicic acid, mucin and gum arabic) and involved the measurement of the distribution of 22:6n-3 in incubation contents and disappearance of 22:6n-3 over a 24-h period. Based on their capacity to interact with free FA, bentonite (Palatsi et al, 2012), silicic acid (Proctor and Palaniappan, 1990), mucin (De Weirdt et al, 2013) and gum arabic (Xiang et al, 2015) were used in the current experiment. As both mucin and gum arabic provide fermentable substrate for rumen bacteria, two additional experiments were performed to distinguish between (1) decreasing the interaction of free FA and bacteria and (2) stimulation of bacterial growth.…”

Section: Introductionmentioning

confidence: 99%

Effect of adsorbants on in vitro biohydrogenation of 22:6n-3 by mixed cultures of rumen microorganisms

Vlaeminck

Jeyanathan

Thanh

et al. 2016

animal

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Studies on microbial biohydrogenation of fatty acids in the rumen are of importance as this process lowers the availability of nutritionally beneficial unsaturated fatty acids for incorporation into meat and milk but also might result in the accumulation of biologically active intermediates. The impact was studied of adsorption of 22:6n-3 (DHA) to particulate material on its disappearance during 24 h in vitro batch incubations with rumen inoculum. Four adsorbants were used in two doses (1 and 5 mg/ml of mucin, gum arabic, bentonite or silicic acid). In addition, the distribution of 22:6n-3 in the pellet and supernatant of diluted rumen fluid was measured. Bentonite and silicic acid did not alter the distribution of 22:6n-3 between pellet and supernatant nor increased the disappearance of 22:6n-3 during the incubation. Both mucin and gum arabic increased the recovery of 22:6n-3 in the supernatant, indicating that these compounds lowered the adsorption of the fatty acid to ruminal particles. This was associated with an increased disappearance of 22:6n-3, when initial 22:6n-3 was 0.06 or 0.10 mg/ml, and an increased formation of 22:0, when initial 22:6n-3 was 0.02 mg/ml, during the 24 h batch culture experiment. Addition of gum arabic to pure cultures of Butyrivibrio fibrisolvens or Butyrivibrio proteoclasticus did not negate the inhibitory effect of 22:6n-3 on growth. As both mucin and gum arabic provide fermentable substrate for ruminal bacteria, an additional experiment was performed in which mucin and gum arabic were replaced by equal amounts of starch, cellulose or xylan. No differences in disappearance of 22:6n-3 were observed, suggesting that the stimulatory effect of mucin and gum arabic on disappearance of 22:6n-3 most probably is not due to provision of an alternative site of adsorption but related to stimulation of bacterial growth. A relatively high proportion of 22:6n-3 can be reduced to 22:0 provided the initial concentration is low.

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Section: Introductionmentioning

confidence: 99%

Effect of adsorbants on in vitro biohydrogenation of 22:6n-3 by mixed cultures of rumen microorganisms

Vlaeminck

Jeyanathan

Thanh

et al. 2016

animal

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“…LCFAs have been reported to be the main intermediates from oil degradation process, and would be further converted by acetogenic bacteria (b-oxidation process) to hydrogen and acetate, and finally to methane by methanogenic archaea (Palatsi et al, 2012). Theoretically speaking, oil could generate more biomethane than other wastes such as protein and carbohydrates (Pereira et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…According to the study by Fernández et al (2005), the oil (or lipids) from animal or vegetable origins could be degraded almost completely in one anaerobic digestion process. However, LCFAs accumulation in the anaerobic digestion has been related with various problems like sludge floatation, biomass washout, and inhibition of microbial activity (Cirne et al, 2007;Neves et al, 2009b;Palatsi et al, 2012;Zonta et al, 2013). Meng et al (2014) also reported that the oil accumulated in a batch reactor caused a severe sludge flotation at high organic loading rate (8.0 g COD/L d) after a long running phase.…”

Section: Introductionmentioning

confidence: 99%

Evaluating biomethane production from anaerobic mono- and co-digestion of food waste and floatable oil (FO) skimmed from food waste

Meng

Yuan

et al. 2015

Bioresource Technology

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“…Palatsi et al (2012) evaluated the impact of LCFA adsorption on the methanogenic activity in batch assays for two anaerobic granular sludges in the presence and absence of bentonite as synthetic adsorbent. A clear inhibitory effect was observed at an oleate concentration of 0.5 g.L -1 .…”

Section: Introductionmentioning

confidence: 99%

Use of a Griffith Tube to Evaluate the Anaerobic Sludge Sedimentation in a Uasb Reactor Treating an Effluent With Long-Chain Fatty Acids

Miranda

Borges

Monteggia

2017

Braz. J. Chem. Eng.

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-This paper proposes to study the sedimentation characteristics of anaerobic sludge, by determining the settling velocity of sludge granules with the Griffith Tube. This is a simple, low-cost method, suitable for use in full-scale treatment plants. The settling characteristics of sludge from two laboratory-scale UASB reactors fed with saccharose and different concentrations of sodium oleate and sodium stereate were evaluated. Addition of fatty acids caused a gradual destabilization of the system, affecting overall performance. The sedimentation profile changed after addition of fatty acids to the synthetic substrate, decreased sedimentation velocity and increased granule diameter. This behaviour was attributed to the adsorption of fatty acids onto the granules, modifying the diameter, shape and density of these bioparticles.

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Influence of adsorption and anaerobic granular sludge characteristics on long chain fatty acids inhibition process

Cited by 67 publications

References 30 publications

Effect of adsorbants on in vitro biohydrogenation of 22:6n-3 by mixed cultures of rumen microorganisms

Effect of adsorbants on in vitro biohydrogenation of 22:6n-3 by mixed cultures of rumen microorganisms

Evaluating biomethane production from anaerobic mono- and co-digestion of food waste and floatable oil (FO) skimmed from food waste

Use of a Griffith Tube to Evaluate the Anaerobic Sludge Sedimentation in a Uasb Reactor Treating an Effluent With Long-Chain Fatty Acids

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