Flexible biogas production for demand-driven energy supply – Feeding strategies and types of substrates

Mauky, Eric; Jacobi, H.; Liebetrau, Jan; Nelles, Michael

doi:10.1016/j.biortech.2014.08.123

Cited by 93 publications

(73 citation statements)

References 14 publications

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“…Figure 3b-d illustrates the effect on the necessary gas storage capacity caused by flexible and continuous gas production for the respective scenarios of gas conversion/gas storage time 16/8, 12/12, and 8/16 h. Since the standard case has a gas storage capacity of 8 h, the 8/16 scenario represents the limit of the operation with Fig. 3 Gas storage demand comparing continuous feeding and flexible feeding [105] constant gas production. The available gas storage (100 %) is utilized completely.…”

Section: Discussionmentioning

confidence: 99%

Flexible bioenergy supply for balancing fluctuating renewables in the heat and power sector—a review of technologies and concepts

et al. 2015

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Today bioenergy plays a major role in the renewable energy provision, for heat and power and for liquid biofuels as well. With an increasing share of renewables on the one hand side and a limited availability of biomass on the other hand, the provision of bioenergy has to consider the demands of the future energy system with high shares of fluctuating wind and solar power. This includes new and improved technologies and concepts for biogas, biomethane, and liquid and solid biofuels, which are discussed in the following, while for the electricity sector, the demand for more flexible provision might take place in the years to come; for more flexible heat provision, the transition is expected in a longer time frame. For their market implementation adopted regulatory framework and price signals from electricity markets are necessary. Review

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Section: Discussionmentioning

confidence: 99%

Flexible bioenergy supply for balancing fluctuating renewables in the heat and power sector—a review of technologies and concepts

et al. 2015

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“…The authors conclude that biogas can be produced with high flexibility using diurnal flexible feeding and precise combinations of substrates with different degradation kinetics. 14 Evaluation of distinctive economic and ecological metrics for multiple objective considerations is undertaken in a life cycle-based accounting model of a domestic biogas system. A typical household biogas system in Gongcheng, China, is ideal for a case study.…”

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confidence: 99%

A practical biogas based energy neutral home system for rural communities of Bangladesh

Das

Ehsan

Kader

et al. 2016

Journal of Renewable and Sustainable Energy

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Growing demand of energy consumption, subsequent increase in energy generation costs, and increased greenhouse gas (GHG) emissions, as well as global warming from the conventional energy sources, encourages interest worldwide to bring a higher percentage of renewable energy sources such as biogas into the energy mix to build a climate friendly environment for the future. Moreover, due to high investment and maintenance costs, governments are not providing enough support for grid extension and delivering electricity to remote locations or rural areas, in particular, in under-developing countries like Bangladesh. Therefore, this paper presents an Energy Neutral Home System (ENHS) that can meet all its energy requirements from low-cost, locally available, nonpolluting biogas generated from animal waste, in particular, chicken and cow manure. The proposed ENHS has been developed for rural community, typically an area of 200 families, and will not only provide cooking gas and sustainable and affordable power supply to the community with low emissions, but will also facilitate high quality fertilizer for agricultural purposes. In-depth analysis clearly demonstrates that the proposed ENHS not only offers electricity and cooking gas to the community with the lowest costs, but also reduces the energy crisis and GHG emissions and can play an active role in developing socio-economic infrastructure of rural communities in Bangladesh in many ways. V C 2016 AIP Publishing LLC.

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“…Hereby, we focused on already available technologies for retrofitting existing plants, as the level of the current incentives of the feed-in tariff system is expected to result in a rather small increase in the total installed capacities in the years to come [23,25]. Hence, innovative technologies, like multi-stage biogas plant concepts [26][27][28] or gasification CHPs for solid biomass [29] with larger bandwidth for load changes or spread between minimal and maximal load, are more likely to be realized after the year 2022.…”

Section: Scenario Overviewmentioning

confidence: 99%

“…Biogas plants are characterized by a high daily flexibility, resting upon an easy to control power output of generator sets and a relatively constant gas production. The constant gas production leads to an inflexibility related to seasonal adaptations in contrast to daily adaptations [30][31][32]. Table 2 provides an overview on the characteristics of the two clusters.…”

Section: Scenario Overviewmentioning

confidence: 99%

Impact of flexible bioenergy provision on residual load fluctuation: a case study for the TransnetBW transmission system in 2022

et al. 2017

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Background: The transition towards a renewable based power system in Germany largely depends on variable renewable energy sources (vRES) like wind power and solar PV. Their high variability over time poses new challenges for power system stability. Bioenergy as a renewable source has already been established in recent years and has the capability to offset fluctuations from wind and solar PV and can therefore play a new role in coming years. Methods: This paper describes how existing bioenergy plants can be operated in order to offset fluctuations in power systems, performing a power system modelling based on time series data. As sample transmission system (TS), TransnetBW has been chosen, one of the four German transmission systems. We modelled two different types of bioenergy plant clusters, one including solid biomass plants and the other cluster covering biogas plants and other plants with comparable characteristics. For the modelling of the operation of these clusters, we used registered time series of the years 2011 and 2012 for a total load and feed-in from wind and solar PV, which were projected for the year 2022. The flexible bioenergy clusters are operated in order to minimize fluctuations in residual load (RL). This approach served as the basis to assess how concepts for flexible bioenergy provision can contribute to the task of balancing future power systems based on vRES. Results: Bioenergy plays an important role in the renewable power supply of the TransnetBW TS, as it holds a share of 23.3% among the renewables projected for 2022. A flexible bioenergy (BE) provision allows for a reduction in daily residual load fluctuations by 30% compared to the non-flexible power generation from BE. Flexible BE effectively offsets high fluctuations originated from the feed-in of the substantial solar PV installations in the TS and also contributes to serve the peak load. But in contrast to regions with higher renewable shares from vRES, the amount of avoided BE power production in times of negative RL (excess power from renewables) is still negligible for the 2022 time frame investigated and thus reducing the immanent requirement for flexible BE. Conclusions: In line with existing studies, the results show that bioenergy is already a valuable asset to achieve the targeted REN shares and can support the integration of the large vRES capacities in coming years, if produced flexibly. Operating biomass installations in a flexible manner effectively reduce daily fluctuations in RL, allow for a better integration of vRES and contribute to cover peak power demand. But from the findings of this case study, we conclude that the focus in the near-term should be on the efficient utilization of BE as the top priority until the demand for flexible BE provision is progressively increased with rising shares of vRES. Giving the regional differences, it should be stressed that the regional context, the relative share of wind and solar PV in the power system and therefore the investigated time horizon are important for ...

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Flexible biogas production for demand-driven energy supply – Feeding strategies and types of substrates

Cited by 93 publications

References 14 publications

Flexible bioenergy supply for balancing fluctuating renewables in the heat and power sector—a review of technologies and concepts

Flexible bioenergy supply for balancing fluctuating renewables in the heat and power sector—a review of technologies and concepts

A practical biogas based energy neutral home system for rural communities of Bangladesh

Impact of flexible bioenergy provision on residual load fluctuation: a case study for the TransnetBW transmission system in 2022

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