Demand-driven biogas production in anaerobic filters

Lemmer, Andreas; Krümpel, Johannes

doi:10.1016/j.apenergy.2016.10.073

Cited by 25 publications

(13 citation statements)

References 79 publications

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“…Since the general TOC content decreased and propionate was not consumed, its share of the overall TOC content (1.2 g/l) increased on average to 75.6%. Therefore, 25% of the residual TOC, corresponding to about 0.3 g/l, comprised a mixture of other compounds which corresponds to previous results [ 35 ]. Those are conceivably humic or fulvic acids, as the fermentate possesses a dark brownish color.…”

Section: Resultssupporting

confidence: 88%

Development of a production chain from vegetable biowaste to platform chemicals

et al. 2018

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BackgroundA future bioeconomy relies on the development of technologies to convert waste into valuable compounds. We present here an attempt to design a biotechnological cascade for the conversion of vegetable waste into acetoin and electrical energy.ResultsA vegetable waste dark fermentation effluent containing mainly acetate, butyrate and propionate was oxidized in a bioelectrochemical system. The achieved average current at a constant anode potential of 0 mV against standard hydrogen electrode was 177.5 ± 52.5 µA/cm2. During this step, acetate and butyrate were removed from the effluent while propionate was the major remaining component of the total organic carbon content comprising on average 75.6%. The key players with regard to carbon oxidation and electrode reduction were revealed using amplicon sequencing and metatranscriptomic analysis. Using nanofiltration, it was possible to concentrate the propionate in the effluent. The effluent was revealed to be a suitable medium for biotechnological production strains. As a proof of principle, the propionate in the effluent of the bioelectrochemical system was converted into the platform chemical acetoin with a carbon recovery of 86%.ConclusionsTo the best of our knowledge this is the first report on a full biotechnological production chain leading from vegetable waste to the production of a single valuable platform chemical that integrates carbon elimination steps leading to the production of the valuable side product electrical energy.Electronic supplementary materialThe online version of this article (10.1186/s12934-018-0937-4) contains supplementary material, which is available to authorized users.

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Section: Resultssupporting

confidence: 88%

Development of a production chain from vegetable biowaste to platform chemicals

et al. 2018

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“…Although the following quotation from Grandoa et al () appears questionable based on, for example, Jacobs et al () or Auburger et al, (), it shows the sustainable potential of biogas production: “Anaerobic digestion technology for biogas production constitutes today the most sustainable way of using the energy present in biomass and other wastes, because it also increases nutrient recovery and reduces greenhouse gas emissions.” One of these major advances is the flexible, demand‐oriented production, and use of biogas. When decentralized, this can make a significant contribution to stabilizing the electricity grids, which will be burdened by the fluctuating electricity production of photovoltaics and wind power plants and their rapid expansion (Lemmer & Krümpel, ).…”

Section: Technical Framework Conditions For Biogas Production In the mentioning

confidence: 99%

“…One of these major advances is the flexible, demand-oriented production, and use of biogas. When decentralized, this can make a significant contribution to stabilizing the electricity grids, which will be burdened by the fluctuating electricity production of photovoltaics and wind power plants and their rapid expansion (Lemmer & Krümpel, 2017).…”

Section: Conditions For Biogas Production In the Context Of Anaerobicmentioning

confidence: 99%

Status quo and perspectives of biogas production for energy and material utilization

Bahrs

Angenendt

2018

GCB Bioenergy

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Biogas is in many respects a serious alternative to other fossil resources and complements other renewable energy sources from wind and sun. Biogas can be produced in many places decentrally. Its energy potential is high, and it is widely used in the EU and all over the world. With more than 16,000 ktoe of oil equivalent in the EU in 2016, it corresponds to approximately 8% of the total primary energy produced by renewable energies in the EU, produced with nearly 17,000 biogas plants. Nevertheless, the production costs of biogas and its products like energy, heat, and fuel are still too high. Kost et al. (2018) show a comparison of electricity generation costs of different renewable energies and their future potentials. While electricity from huge biogas plants offers generation costs from 10 to 15 ct/kWh, electricity from onshore wind and huge solar systems offers generation costs from 4 to 8 ct/kWh. Although substantial progress has been made with regard to substrate use, production techniques and market designs, many more innovations are needed throughout the biogas value chain for it to be competitive in energy markets without high subsidies. As several papers in the special issue on biogas show, there are numerous innovations and product designs with regard to energy and material uses that could maintain or even increase the importance of biogas production both within and outside of the EU. There are many potential benefits of biogas, as it offers high shares of produced renewable energies as well as large amounts of material products like digestates and in future maybe products of higher value such as proteins or lactic acids.

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“…Flexible biogas production was proposed as an important pathway for realizing demand-oriented biogas supply, which is operated by controlling the anaerobic digestion (AD) process in order for just-in-time biogas production when power is needed [5][6][7]. Compared with the traditional demand-oriented pathway by extension of biogas storage capacity, the additional investments, operational costs and the risk caused by higher biogas storage capacity could be significantly reduced via flexible biogas production [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Compared with the traditional demand-oriented pathway by extension of biogas storage capacity, the additional investments, operational costs and the risk caused by higher biogas storage capacity could be significantly reduced via flexible biogas production [8,9]. Some specific technologies of flexible biogas production have already been researched; for instance, Linke et al [10] and Lemmer et al [6] focused their attention on the adaption of a two-stage systembiogas plant configuration that generates liquid substrates with a high content of easily degradable organic matter. This can be fed in variable amounts into fixed-bed digesters to increase the biogas production instantly.…”

Section: Introductionmentioning

confidence: 99%

Experiments and Modeling for Flexible Biogas Production by Co-Digestion of Food Waste and Sewage Sludge

Liu

Huang

et al. 2020

Energies

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This paper explores the feasibility of flexible biogas production by co-digestion of food waste and sewage sludge based on experiments and mathematical modeling. First, laboratory-scale experiments were carried out in variable operating conditions in terms of organic loading rate and feeding frequency to the digester. It is demonstrated that biogas production can achieve rapid responses to arbitrary feedings through co-digestion, and the stability of the anaerobic digestion process is not affected by the overloading of substrates. Compared with the conventional continuous mode, the required biogas storage capacity in flexible feeding mode can be significantly reduced. The optimum employed feeding organic loading rate (OLR) is identified, and how to adjust the feeding scheme for flexible biogas production is also discussed. Finally, a simplified prediction model for flexible biogas production is proposed and verified by experimental data, which could be conveniently used for demand-oriented control. It is expected that this research could give some theoretical basis for the enhancement of biogas utilization efficiency, thus expanding the applications of bio-energy.

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Demand-driven biogas production in anaerobic filters

Cited by 25 publications

References 79 publications

Development of a production chain from vegetable biowaste to platform chemicals

Development of a production chain from vegetable biowaste to platform chemicals

Status quo and perspectives of biogas production for energy and material utilization

Experiments and Modeling for Flexible Biogas Production by Co-Digestion of Food Waste and Sewage Sludge

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