Kinetics of methanogenesis from whey permeate in packed bed immobilized cells bioreactor

Yang, Shang‐Tian; Guo, Meining

doi:10.1002/bit.260360414

Cited by 16 publications

(10 citation statements)

References 32 publications

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“…The carbohydrates are considered as being easily biodegradable (Pavlostathis and Giraldo-Gomez, 1991;Yang and Guo, 1990;Yan et al, 1989). The proteins and amino acids seem to show no problem to adapted biomass, as long as the conditions, like pH and temperature inside the reactor remain favorable, since the proteins can precipitate if the pH is too low, making the biodegradation more difficult (Caine et al, 1991;Perle et al, 1995;Zeeman et al, 1997).…”

Section: Introductionmentioning

confidence: 98%

Effect of non‐feeding period length on the intermittent operation of UASB reactors treating dairy effluents

Coelho

Rodrigues

Arroja

et al. 2006

Biotech & Bioengineering

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Recent environmental concerns have prompted a re-evaluation of conventional management strategies and refueled the search of innovative waste management practices. In this sense, the anaerobic digestion of both fat and the remaining complex organic matter present in dairy wastewaters is attractive, although the continuous operation of high rate anaerobic processes treating this type of wastewaters causes the failure of the process. This work accesses the influence of non-feeding period length on the intermittent operation of mesophilic UASB reactors treating dairy wastewater, in order to allow the biological degradation to catch up with adsorption phenomenon. During the experiments, two UASB reactors were subject to three organic loading rates, ranging from 6 to 12 g(COD) x L(-1) x d(-1), with the same daily load applied to both reactors, each one with a different non-feeding period. Both reactors showed good COD removal efficiencies (87-92%). A material balance for COD in the reactors during the feeding and non-feeding periods showed the importance of the feedless period, which allowed the biomass to degrade substrate that was accumulated during the feeding period. The reactor with the longest non-feeding period had a better performance, which resulted in a higher methane production and adsorption capacity for the same organic load applied with a consequent less accumulation of substrate into the biomass. In addition, both reactors had a stable operation for the organic load of 12 g(COD) x L(-1) x d(-1), which is higher than the maximum applicable load reported in literature for continuous systems (3-6 g(COD) x L(-1) x d(-1)).

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Section: Introductionmentioning

confidence: 98%

Effect of non‐feeding period length on the intermittent operation of UASB reactors treating dairy effluents

Coelho

Rodrigues

Arroja

et al. 2006

Biotech & Bioengineering

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“…Exoglucanase activity was close to the filter paperase enzyme activity and lower than the endoglucanase and β-glucosidase activities because exoglucanase activity was identified as the rate-limiting enzyme in cellulose degradation (Lynd et al 2002). The total cellulase activity significantly increased compared with the extracellular cellulase activity (P < 0.01) because substantial cellulase comprises intracellular enzyme, extracellular enzyme, and enzymes that connect to cells (Weimer et al 1990;Gong and Forsberg 1993). The filter paperase activity of LBG-1, VI3, CCQ, and WH-1 exhibited a decreasing trend.…”

Section: Discussion On the Difference In Enzyme Activitymentioning

confidence: 92%

Analysis of cellulolytic bacterial flora in the rumen of inner Mongolian sheep

Liu

et al. 2019

BioRes

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The cellulolytic bacterial flora present in the rumen of Inner Mongolian sheep are thought to have a high degree of cellulose-degrading activity because of their foraging feeding regimen. However, there are no report on the genetic and species composition of the cellulolytic bacterial flora. In this study, cellulolytic bacteria were isolated from the rumen of Inner Mongolian sheep using a combined method of transparent zone and filter paper degradation. Twenty-two strains were identified via morphological, physiological, and biochemical tests. Ten strains were further identified via DNA (G + C) mol%, together with 16S rDNA gene sequencing analysis. Four types of extracellular and total cellulase activities of representative strains were determined. The results demonstrated that the isolates included Butyrivibrio fibrisolvens, Rumincoccus albus, R. flavefaciens, Fibrobacter succinogenes, and Clostridium polysaccharolyticum. A big proportion of cellulolytic Butyrivibrio fibrisolvens was found in the rumen of Inner Mongolian sheep. This was the first study to analyze the cellulolytic bacterial flora in the rumen of foraging Inner Mongolian sheep. These results indicated that the rumen of Inner Mongolian sheep represents an attractive source for cellulolytic microorganisms and enzymes, and the research results have a certain guiding importance for the efficient degradation of cellulosic materials.

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“…Lactose is a substrate that is readily available to be degraded by the bacterial populations that are typical of high rate anaerobic reactors (62)(63)(64)(65)(66). Special care must be taken in case of very strong effluents, in which the rapid acidification of sugars coupled with eventual lack of alkalinity (e.g., whey or whey processing effluents) may cause reactor instability.…”

Section: Sugarsmentioning

confidence: 99%

Anaerobic Treatment of Milk Processing Wastewater

Nadais

Capela

Arroja

et al. 2010

Environmental Bioengineering

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Anaerobic processes are widely used for the treatment of milk and dairy effluents. This technology has been subjected to significant development and real-scale application in the last few decades and offers highly favorable perspectives to accomplish a complete biodegradation of the components present in milk processing wastewaters such as sugars, proteins, and fats. Nowadays, anaerobic systems for the treatment of milk wastes can be operated successfully constituting an important contribution for the preservation of environmental quality.

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Kinetics of methanogenesis from whey permeate in packed bed immobilized cells bioreactor

Cited by 16 publications

References 32 publications

Effect of non‐feeding period length on the intermittent operation of UASB reactors treating dairy effluents

Effect of non‐feeding period length on the intermittent operation of UASB reactors treating dairy effluents

Analysis of cellulolytic bacterial flora in the rumen of inner Mongolian sheep

Anaerobic Treatment of Milk Processing Wastewater

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