Effect of cobalt on the anaerobic degradation of methanol

Florêncio, Lourdinha; Jenı́ček, P.; Field, Jim A.; Lettinga, G.

doi:10.1016/0922-338x(93)90136-v

Cited by 77 publications

(71 citation statements)

References 35 publications

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“…The SMA was inhibited, and the biomass growth was stimulated in most of these two hotspots. The phenomena were different from the typical reports of TE stimulation methane production activity at low dosage (Florencio et al 1993). In this study, TE supplementation inhibited the SMA but stimulated the COD removal, methane production and biomass growth, which was in accordance with the mechanism of enzyme re-activation.…”

Section: Multiple Effects Of Tes On Methanogenesiscontrasting

confidence: 98%

“…Lindorfer reported that enhanced digester performance was accompanied by increased bacterial biomass (Lindorfer et al 2012). Osuna mentioned that degradation rates of specific substrate were not affected while the maximum specific activity of methanogens was stimulated (Florencio et al 1993;Osuna et al 2003). To sum up, there are four critical effects of methanogenesis induced by TE supplementation including more methane production, higher activity of methanogenic microorganisms, more biomass growth and higher COD removal, which are vital to AnMBR, but their combined or synergistic interactions were remaining ambiguous.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

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Multiple effects of trace elements on methanogenesis in a two-phase anaerobic membrane bioreactor treating starch wastewater

Wang

et al. 2016

Appl Microbiol Biotechnol

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For enhancing anaerobic membrane bioreactor (AnMBR) treating food processing wastewater due to speedlimited methanogenesis step, multiple effects of trace element (TE) supplementation on methanogenesis of a two-phase AnMBR were firstly investigated in batch tests. TE supplementation included individual element, combination and recovery of Fe, Ni, Co, Cu and Zn supplementation. Multiple effects of TE supplementation were highest stimulated by 22.4 ± 5.6 % (TE313) for chemical oxygen demand (COD) removal, 43.1 ± 12.5 % (TE303) for specific methanogenic activity (SMA) and 13.9 ± 3.7 % (TE405) for biomass growth, respectively, although only 7.5 ± 0.6 % (TE106) for methane production. Dosage of TEs played a critical role in methane production, COD removal and biomass growth of the AnMBR's methanogenesis. Low dosages of TE supplementation improved the COD removal and slightly stimulated the COD bioconverting to methane and biomass, but their specific methanation activities were inhibited in the initial rapid methanogenesis stage. Several methanation functional species were increased in abundance like Methanosarcina and Methanoculleus.

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Section: Multiple Effects Of Tes On Methanogenesiscontrasting

confidence: 98%

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Multiple effects of trace elements on methanogenesis in a two-phase anaerobic membrane bioreactor treating starch wastewater

Wang

et al. 2016

Appl Microbiol Biotechnol

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“…Cobalt, nickel, iron, copper, zinc and manganese are considered as the most important trace metals for methanogens [9,12,32,36]. Especially cobalt was many times reported as a very important micronutrient, as the cobalt-containing cofactors (vitamin B 12 ) play a key role in the methylotrophic methanogenic pathway [10,11,47].…”

Section: Introductionmentioning

confidence: 99%

Cobalt toxicity in anaerobic granular sludge: influence of chemical speciation

Bartacek

Fermoso

Baldó-Urrutia

et al. 2008

J Ind Microbiol Biotechnol

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The influence of cobalt speciation on the toxicity of cobalt to methylotrophic methanogenesis in anaerobic granular sludge was investigated. The cobalt speciation was studied with three different media that contained varying concentrations of complexing ligands [carbonates, phosphates and ethylenediaminetetraacetic acid (EDTA)]. Three fractions (nominal added, dissolved and free) of cobalt were determined in the liquid media and were correlated with data from batch toxicity experiments. The average concentration of cobalt that was required for 50% inhibition of methanogenic activity (IC 50 ) for free Co 2? in the three sets of measurements was 13 lmol/L with a standard deviation of 22% and a similarity of 72% between the data obtained in the three different media for the range of cobalt concentrations investigated. The standard deviation of the IC 50 for the other two fractions was much higher, i.e. 85 and 144% for the added cobalt and dissolved cobalt, respectively, and the similarity was almost 0% for both fractions. Complexation (and precipitation) with EDTA, phosphates and carbonates was shown to decrease the toxicity of cobalt on methylotrophic methanogenesis. The free cobalt concentration is proposed to be the key parameter to correlate with cobalt toxicity. Thus, the toxicity of cobalt to granular sludge can be estimated based on the equilibrium-free cobalt concentration.

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“…Based on the insights obtained, to some extent the excessive spreading of trace elements over the environment can be prevented, while concomitantly the operational cost of AnWT can be reduced. The studies conducted in our department so far particularly have been addressed to the assessment of the effect of trace elements on the anaerobic conversion of i) substrates/wastewaters originating from potato, and ii) of methanol, in the latter case both under mesophilic [65][66][67] and thermophilic conditions [68]. Comprehensive investigations of Florencio et al [65][66][67]69] with methanol, lead to the insight that at low methanol and bicarbonate concentrations, and exceptionally low cobalt-concentration ( < 0.0001 mg/L) methanogens predominate over acidogens in the methanol conversion.…”

Section: Mixing Conditionsmentioning

confidence: 99%

Challenges of a feasible route towards sustainability in environmental protection

Lettinga

2010

Front. Environ. Sci. Eng. China

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Anaerobic processes for treatment of low and high strength wastewaters and solid wastes constitute the core method in the natural biological mineralization (NBM) treatment concept. When adequately combined with the complementary NBM-systems and modern clean water saving practices in wastewater collection and transport, they represent a feasible route to sustainable environmental protection (EP sus ), in essence even towards a more sustainable society. Despite the development and implementation of modern high rate Anaerobic Wastewater Treatment (AnWT-) systems and complementary innovative NBM-processes, the considerable progress made since the seventies in fundamental insights in microbiology, biochemistry and process technology, still numerous challenging improvements in the NBM-field can be realized. This contribution is mainly based on the insights attained from wide ranging literature evaluations and the results of experimental research conducted by numerous PhD students who participated in our group over the last four decades. An attempt is made here to identify major facets on which an improved insight can, and consequently should, be obtained in order to accomplish more optimal operation and design of various types of Anaerobic Degradation (AnDeg-) processes.

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Effect of cobalt on the anaerobic degradation of methanol

Cited by 77 publications

References 35 publications

Multiple effects of trace elements on methanogenesis in a two-phase anaerobic membrane bioreactor treating starch wastewater

Multiple effects of trace elements on methanogenesis in a two-phase anaerobic membrane bioreactor treating starch wastewater

Cobalt toxicity in anaerobic granular sludge: influence of chemical speciation

Challenges of a feasible route towards sustainability in environmental protection

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