Does the addition of proteases affect the biogas yield from organic material in anaerobic digestion?

Müller, Liane; Kretzschmar, Jörg; Pröter, Jürgen; Liebetrau, Jan; Nelles, Michael; Scholwin, Frank

doi:10.1016/j.biortech.2015.12.038

Cited by 18 publications

(11 citation statements)

References 8 publications

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“…Furthermore, NH 4 ‐N and the sum concentration of VFA were determined once a week during the MESe integration experiments. NH 4 ‐N was assessed by colorimetric analysis using Nessler's reagent (Merck KGa, Germany) , . The measurement was performed versus water at 425 nm using a DR/3900 spectrophotometer (Hach‐Lange, USA).…”

Section: Methodsmentioning

confidence: 99%

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Microbial Electrochemical Sensors for Anaerobic Digestion Process Control – Performance of Electroactive Biofilms under Real Conditions

et al. 2018

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The autonomous growth of Geobacter sp.‐dominated biofilms on electrodes and their sensitivity on volatile fatty acids (VFAs) allows their application as biosensor. In this study, the implementation of a microbial electrochemical sensor in the anaerobic digestion (AD) process is reported. The amperometric sensor signal follows the acetate concentration profile in the AD process. Yet, the sensor's stability is impaired by the process conditions. Therefore, potential biofilm inhibitors are individually examined, i.e., high salt and NH4+ concentrations as well as fumarate as potential alternative electron acceptor. The results show no influence of high salinity on the signal, whereas ammonia at a concentration ≥ 5 g L−1 NH4+ acts as inhibitor, and fumarate is used as substrate for current generation.

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Section: Methodsmentioning

confidence: 99%

“…The measurement was performed versus water at 425 nm using a DR/3900 spectrophotometer (Hach‐Lange, USA). The sum concentration of VFA was determined by titration with sulfuric acid with a Titration Excellence T90 titrator (Mettler‐Toledo GmbH, Switzerland) , . The reactor was operated for 29 months.…”

Section: Methodsmentioning

confidence: 99%

Microbial Electrochemical Sensors for Anaerobic Digestion Process Control – Performance of Electroactive Biofilms under Real Conditions

et al. 2018

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“…Better results were obtained in the applicability of proteases from B. licheniformis and A. oryzae, the glycosidase SCO6604 and lysozyme compared to other enzymes such as (BCE_2078 and CTec 2) [142]. Muller et al [143] studied the effect of some proteases (alkaline, serine, and aspartic types) on a mix of corn silage, chicken manure, and cow dung in a 2 L BMP (bio-methane potential) test. The results showed that the methane yield was increased from 9 to 52%.…”

Section: Other Enzymesmentioning

confidence: 99%

Microorganisms and Enzymes Used in the Biological Pretreatment of the Substrate to Enhance Biogas Production: A Review

et al. 2020

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The pretreatment of lignocellulosic biomass (LC biomass) prior to the anaerobic digestion (AD) process is a mandatory step to improve feedstock biodegradability and biogas production. An important potential is provided by lignocellulosic materials since lignocellulose represents a major source for biogas production, thus contributing to the environmental sustainability. The main limitation of LC biomass for use is its resistant structure. Lately, biological pretreatment (BP) gained popularity because they are eco-friendly methods that do not require chemical or energy input. A large number of bacteria and fungi possess great ability to convert high molecular weight compounds from the substrate into lower mass compounds due to the synthesis of microbial extracellular enzymes. Microbial strains isolated from various sources are used singly or in combination to break down the recalcitrant polymeric structures and thus increase biogasgeneration. Enzymatic treatment of LC biomass depends mainly on enzymes like hemicellulases and cellulases generated by microorganisms. The articles main purpose is to provide an overview regarding the enzymatic/biological pretreatment as one of the most potent techniques for enhancing biogas production.

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“…Volatile organic acids rose up to 6.8 gl (-1). The anaerobic digestion process was inhibited [57]. In this study modeled full scale application of thermobarical hydrolysis of less degradable feedstock for biomethanation was assessed in terms of energy balance, greenhouse gas emissions, and economy.…”

Section: Characterization Of Cow Dung For Farming Systemmentioning

confidence: 99%

Review on the Potentials of Cow (Bos indicus) Based Bioenhancers in Increasing Crop Yield and Farmers Income as well as the Soil Health and Environmental Sustainability

Kumar¹,

Baliyan²,

Panwar³

et al. 2018

SAJRM

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The haphazard use of the chemical fertilizers and pesticides has detrimental effects on soil health, human health, groundwater quality and environment. This will cause more dangerous consequences for future productivity. Present status of all food grain production is in enough quantity for the population of our country but there is need to enhance the quality of food production, quality of soil, quality of ground water and quality of a healthy environment for better livelihood. These qualities can be obtained by replacing toxic chemicals through natural and organic input which is more vital for present prospect and future outlook. The “Cow” occupies the highest place of honour in Indian civilization. She is supposed to fulfil all desires of human beings, hence known as “Kamdhenu”. Owing to ignorance, after stopping of milk production, they are left uncared for forced to live extensively and eat polythene and other wastes in towns and cities. It is interesting that in Indian agricultural systems “Cow” particularly those with a hump (indigenous breed) is one of the key components, hence provision of at least one cow per hectare need to be promoted for Jaivik Krishi activities in organic farming. This review paper attempts to bring together the different use of cow based organic formulations in crop production and protection. It has been reported that organic formulation in crop production is productive and sustainable, but there is a need for strong support to it in the form of manifestation of subsidies, agricultural extension services and intensive research with solid proofs. With these efforts we can fulfil the dream of our present government; to double the income of Indian farmers.

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Does the addition of proteases affect the biogas yield from organic material in anaerobic digestion?

Cited by 18 publications

References 8 publications

Microbial Electrochemical Sensors for Anaerobic Digestion Process Control – Performance of Electroactive Biofilms under Real Conditions

Microbial Electrochemical Sensors for Anaerobic Digestion Process Control – Performance of Electroactive Biofilms under Real Conditions

Microorganisms and Enzymes Used in the Biological Pretreatment of the Substrate to Enhance Biogas Production: A Review

Review on the Potentials of Cow (Bos indicus) Based Bioenhancers in Increasing Crop Yield and Farmers Income as well as the Soil Health and Environmental Sustainability

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