Influence of bed materials on methanogenic characteristics and immobilized microbes in anaerobic digester

Yang, Yingnan; Tada, Chika; Miah, Shohidullah; Tsukahara, Kenichiro; Yagishita, Tatsuo; Sawayama, Shigeki

doi:10.1016/j.msec.2003.11.005

Cited by 71 publications

(29 citation statements)

References 19 publications

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“…1 (a)). The morphology was similar with the results of Yang et al 19) in fluidized bed reactor and Aguilar et al 16) in CSTR with acetate as sole organic substrate, and resembled with the findings of Uemura and Harada 20) in thermophilic UASB and Mösche and Jördening 21) in fluidized bed reactor with acetate as main substrate. The microscopic observation was also in agreement with the morphological descriptions of these two kinds of methanogens by Lange and Ahring 22) .…”

Section: Morphology Of Acetate and Propionate Pregrown Inoculasupporting

confidence: 89%

Kinetic Difference between Acetate and Propionate Pregrown Reactors through Batch Methanogenesis Experiments

Zhang

Yang

Lei

et al. 2008

Japanese J. Wat. Treat. Biol.

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Two pregrown inocula, pre-acclimated to acetate and propionate respectively and mainly composed of coccus, diplococcus-shaped Methanosarcina-like cells and a few filamentous Methanothrix-like cells, were used separately in batch experiments to investigate the effects of varied initial acetate or propionate concentrations on methanogenesis of mixed acetate and propionate substrate under controlled neutral pH and 35±1℃ conditions. The results indicated that acetate pregrown systems exhibited excellent and stable degradation potentials for acetate, with maximum specific substrate degradation rate (qmax) ranging from 1100 to 1900 mg/g-VSS/d when initial acetate and propionate less than 3300 mg/l and 750 mg/l, respectively. Under the same conditions, no distinctive difference in methane production was found for both pregrown systems, with the highest methane production rates of 107-117 ml/l-reactor/d and methane yields ranging from 0.31 to 0.36 l/g-COD removed. The average acetate and propionate degradation rates obtained were 66.7-307.2 and 3.8-86.0 mg/l-reactor/d and 26.7-265.7 and 5.8-92.0 mg/l-reactor/d for acetate pregrown and propionate pregrown systems, respectively, which were found to have some negative correlations with initial propionate/ acetate(P/A) ratio (0-3.0) and initial VFA load (165.7-436.1 mgCOD/l-reactor/d), respectively. It is still a challenge to maintain and control the effectiveness of propionate degradation in pregrown systems.

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Section: Morphology Of Acetate and Propionate Pregrown Inoculasupporting

confidence: 89%

Kinetic Difference between Acetate and Propionate Pregrown Reactors through Batch Methanogenesis Experiments

Zhang

Yang

Lei

et al. 2008

Japanese J. Wat. Treat. Biol.

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“…Meanwhile, the bed material as a decisive factor in the system's performance can determine the biomass retention capacity [18]. The characteristics of bed materials for immobilization have a significant influence on methane production [19]. The adherence and metabolites of microbes mainly depends on the physicochemical characteristics of fixed bed materials like specific surface area, porosity, surface roughness and pore size [19,20].…”

Section: Introductionmentioning

confidence: 99%

Development of a bio-zeolite fixed-bed bioreactor for mitigating ammonia inhibition of anaerobic digestion with extremely high ammonium concentration livestock waste

Zheng

Stanislaus

et al. 2015

Chemical Engineering Journal

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“…Anaerobic digested sludge was used for seed sludge. 800 ml digested sludge and a synthetic medium containing yeast extract (300 mg/l), NH4Cl (200 mg/l), KH2PO4 (16 mg/l), and a trace mineral solution (200 ml/l) was added into a reactor and was acclimated at 35ºC for 7 days before using as seed sludge 8) .…”

Section: Sewage Sludge and Seed Sludgementioning

confidence: 99%

Highly-efﬁcient Anaerobic Digestion of Refractory Organic Waste Using Subcritical Water Hydrolysis as Pretreatment Process

Miyashiro

Wang

Yang

et al. 2012

Japanese J. Wat. Treat. Biol.

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In this study, subcritical water hydrolysis was developed to treat refractory organic waste as a pretreatment process for high-efficiency anaerobic digestion. Sewage sludge and cyanobacteria as representative refractory waste were used. Different treatment temperatures were investigated and methane fermentation from the two pretreated wastes by subcritical water hydrolysis were carried out. The results showed that the optimum treatment temperature is 180°C. 0.8 g/l of formic acid, 8.6 g/l acetic acid, 9.9 g/l propionic acid and 0.6 g/l butyric acid were produced from sewage sludge and 405.8 µg/l of microcystin in cyanobacteria was completely removed in the pretreatment process at 180°C. The cumulative methane production was 43.2 ml and 54 ml from pretreated sewage sludge and cyanobacteria, respectively. Both of them were much higher than those produced from untreated one. Therefore, efficient anaerobic digestion of refractory organic waste using subcritical water hydrolysis as pretreatment process could be achieved.

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Influence of bed materials on methanogenic characteristics and immobilized microbes in anaerobic digester

Cited by 71 publications

References 19 publications

Kinetic Difference between Acetate and Propionate Pregrown Reactors through Batch Methanogenesis Experiments

Kinetic Difference between Acetate and Propionate Pregrown Reactors through Batch Methanogenesis Experiments

Development of a bio-zeolite fixed-bed bioreactor for mitigating ammonia inhibition of anaerobic digestion with extremely high ammonium concentration livestock waste

Highly-efﬁcient Anaerobic Digestion of Refractory Organic Waste Using Subcritical Water Hydrolysis as Pretreatment Process

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