Influence of Process Parameters on Anaerobic Digestion Microbiome in Bioenergy Production: Towards an Improved Understanding

Kundu, Kalipada; Sharma, Shilpi; Sreekrishnan, T.R.

doi:10.1007/s12155-016-9789-0

Cited by 40 publications

(19 citation statements)

References 113 publications

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“…Despite intensive research and growing knowledge on the microbiome most of the species and hence their ecological functions are still unknown [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…In order to establish a sustainable microbial diversity management strategy for anaerobic digestions systems, the question that still has to be answered is "Who does what, when, with whom and why?" [5,8,14,[20][21][22][23]. Moreover, there is an urgent need to better understand the taxonomic, functional and ecological difference between well-performing and disturbed microbiomes.…”

mentioning

confidence: 99%

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Process Disturbances in Agricultural Biogas Production—Causes, Mechanisms and Effects on the Biogas Microbiome: A Review

2019

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Disturbances of the anaerobic digestion process reduce the economic and environmental performance of biogas systems. A better understanding of the highly complex process is of crucial importance in order to avoid disturbances. This review defines process disturbances as significant changes in the functionality within the microbial community leading to unacceptable and severe decreases in biogas production and requiring an active counteraction to be overcome. The main types of process disturbances in agricultural biogas production are classified as unfavorable process temperatures, fluctuations in the availability of macro- and micronutrients (feedstock variability), overload of the microbial degradation potential, process-related accumulation of inhibiting metabolites such as hydrogen (H2), ammonium/ammonia (NH4+/NH3) or hydrogen sulphide (H2S) and inhibition by other organic and inorganic toxicants. Causes, mechanisms and effects on the biogas microbiome are discussed. The need for a knowledge-based microbiome management to ensure a stable and efficient production of biogas with low susceptibility to disturbances is derived and an outlook on potential future process monitoring and control by means of microbial indicators is provided.

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“…Despite intensive research and growing knowledge on the microbiome most of the species and hence their ecological functions are still unknown [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Process Disturbances in Agricultural Biogas Production—Causes, Mechanisms and Effects on the Biogas Microbiome: A Review

2019

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“…Intensive research has provided new insights into the digestion process microbiology during the last two decades, still knowledge on the biogas microbiome is rather limited. Most of the microbiome members and even more their functions and ecological roles in the biogas process are still unknown [32][33][34][35][36][37].…”

Section: Understanding the Digestion Processmentioning

confidence: 99%

“…To control, manage and optimize the biogas plant performance while ensuring stable and efficient biogas production, various process models have been developed [60,61], resulting in a better understanding of the process dynamics, providing optimization opportunities and improvement of digester performance [4,34,54,61,62]. The available models for anaerobic digestion systems can be divided into mechanistic and empirical/data-driven models [60,61].…”

Section: Modelling the Digestion Processmentioning

confidence: 99%

“…The model is based on theoretically optimal reaction condition/kinetics and assumes a perfectly balanced mixture of all reactions, neglecting, for example, variations in the biodegradability/bioaccessablity of different chemical compounds [54,61]. Furthermore, the model is not able to consider the microbial diversity in its real taxonomic, functional and ecological complexity [34,61].…”

Section: Modelling the Digestion Processmentioning

confidence: 99%

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The Future Agricultural Biogas Plant in Germany: A Vision

et al. 2019

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After nearly two decades of subsidized and energy crop-oriented development, agricultural biogas production in Germany is standing at a crossroads. Fundamental challenges need to be met. In this article we sketch a vision of a future agricultural biogas plant that is an integral part of the circular bioeconomy and works mainly on the base of residues. It is flexible with regard to feedstocks, digester operation, microbial communities and biogas output. It is modular in design and its operation is knowledge-based, information-driven and largely automated. It will be competitive with fossil energies and other renewable energies, profitable for farmers and plant operators and favorable for the national economy. In this paper we discuss the required contribution of research to achieve these aims.

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Enhancing methane production from anaerobic co‐digestion of cow manure and barley: Link between process parameters and microbial community dynamics

İnce

Akyol

Özbayram

et al. 2019

Env Prog and Sustain Energy

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The effects of selected process parameters (i.e., temperature, inoculum to substrate ratio [I:S], and inoculum source) on methane production and microbial community structure were investigated in lignocellulose-based anaerobic digestion tests. The results highlighted that dynamic response of microbial communities in changing process parameters subsequently affected anaerobic digestion performance. Co-inoculation of cow rumen fluid to the seed sludge improved the methane yield by 18%. The overall highest methane yield (278 mL CH 4 /g volatile solids) was obtained when cow rumen fluid was co-inoculated with anaerobic seed sludge with an I:S ratio of 1:2 at mesophilic temperature. Based on 16S rRNA gene amplicon sequencing results, Clostridium, Bacteroides, and Bacillus were the predominant bacterial genera in all anaerobic digesters. The highest relative abundances of Clostridum and Bacillus were detected in the thermophilic anaerobic digester. The relative abundance of Rikenella; known for high cellulolytic activity, was significantly higher only in the cow rumen fluid-added digester. Comparatively higher abundances of these lignocellulose-degraders synergistically affected volatile fatty acids as well as methane production in these anaerobic digestion set ups. Methanobacterium was the most abundant methanogen in the digesters inoculated only with anaerobic seed sludge; whereas, Methanobrevibacter dominated the digester that was co-inoculated with cow rumen fluid.

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Influence of Process Parameters on Anaerobic Digestion Microbiome in Bioenergy Production: Towards an Improved Understanding

Cited by 40 publications

References 113 publications

Process Disturbances in Agricultural Biogas Production—Causes, Mechanisms and Effects on the Biogas Microbiome: A Review

Process Disturbances in Agricultural Biogas Production—Causes, Mechanisms and Effects on the Biogas Microbiome: A Review

The Future Agricultural Biogas Plant in Germany: A Vision

Enhancing methane production from anaerobic co‐digestion of cow manure and barley: Link between process parameters and microbial community dynamics

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