Bioenergy villages – local core of energy
Not taking into account lignite and renewable energy sources, it can be argued, Germany depends on imports of energy resources. The import quota on coal, natural gas, and uranium ranges from 80 to 100%. Dependence on economically fragile regions is a risk for the local economy and for an internal relationship. (Picture 1)
Nevertheless, we still need energy for normal functioning. What can help is a smart approach called Distributed Generation. The background of this approach is an idea of powering both urban and rural areas locally by using own sources of energy. Particularly, we will talk about a specific manifestation of Distributed generation called Bioenergy Villages that ensures independence and self-sufficiency for territorial units. «Bioenergiedörfer» Umwelt-Campus Birkenfeld, Campusallee 9926,55768 Neubrücke Distributed generation The concept of Distributed generation is based on using Distributed Energy Resources (DER). Possibility to adjust their size, location and productivity in order to meet specifical needs of the population without over-expenditure make this concept a component part of sustainability from a financial and an ecological perspective. Which one could be called as a Distributed Energy Resource?
Bio-energy villages For its part, the approach of Decentralized Distributed Generation for the rural area has manifested in the concept of Bioenergy villages. What/Who can be a target?
- Interested inhabitants
- Agricultural cooperative
- Commercial enterprises, local companies
- The municipality administration
In the practice a wide variety of biomass conversion processes is presented: A brief and simple explanation of the working principle of producing energy using the example of a residual type of biomass as a resource.
- The waste is burned to heat water.
- Boiled water creates steam.
- The pressure and high temperature of the steam enters a turbine.
- The turbine powers a generator.
- The generator creates electricity.
- CHP (combined heat and power)
Practical implementation Europe is a confluence of glaring examples of such enterprise. According to a list posted by Bioenergy Villages FNR (Fachagentur Nachwachsende Rohstoffe), currently there are 139 bioenergy villages in Germany and 48 units are on the way of implementation. Within the land of Baden-Wurttemberg only there are 39 examples of this strategy. Furthermore, the project „Good Bioenergy Villages in Baden-Württemberg” was started aiming to the energy efficient practices. By the year 2020, it is planned to increase the amount of heat supply and renewable energy used. The International Energy Agency (IEA) has its partners in 29 countries around the world. In 2005 the Federal Republic of Germany joined IEA, having signed an agreement with the organization. Within IEA Germany is currently engaged in 11 ongoing tasks regarding bioenergy and biomass, including inter-task and special projects. On a map below there are presented 14 the most successful practices of implementation of bioenergy strategies in Germany in accordance with a project „Bioenergy Villages (BioVill) - Increasing the Market Uptake of Sustainable Bioenergy” edited by Juan Manuel Ugalde, Dominik Rutz (WIP), Jens Adler (GIZ), Konstanze Stein (KEA), Martin Höher (AEA), Martina Krizmanić, Valerija Vrček, Velimir Šegon (REGEA). http://www.ieabioenergy.com/task/special-projects/
Växjö, Sweden has presented a model of sustainability and aimed to make a city fossil-fuel-free by 2030. The process has started in the 90s. Decisions are making regarding following sectors:
- biomass heat and power (a large wood-chip-fueled combined heat and power plant)
- solar and wind power (using commercial-scale wind turbines as Sweden is not sunny enough)
- sewage treatment plant producing biogas (a big part of the plant was the large biogas digesters. Organic waste is collected from throughout the municipality and anaerobically decomposed in large reactor vessels to produce a methane-rich biogas. This biogas is used to fuel city buses and other municipal vehicles)
- energy-efficient buildings (a single-family detached home and a multi-family apartment complexes built according to a German rating system with high requirements called Passivhaus standard)
- transportation (ethanol-powered vehicles and electric vehicles)
- local food (replacing local food production with organic agriculture)
- Environmental profit (decrease CO2 emission, resilence against natural disasters)
- Self-efficacy (saving more energy because of the less distance between an energy transmitter and a target)
- Economic benefits for local communities (saving local budget, opening new economic relationships within one area, creating employment in rural area)
- Decreasing dependence on one exact source of energy
- Reliability of using biomass since supplies of traditional sources of energy are being exhausted
- Identification of the inhabitants with the village (increase togetherness)
- Strengthening social cohesiveness (encourage residents to organize, fund and implement smart strategy of using biomass )
- Policymakers, administrations, and local government may not always support an initiative
- Long waiting for financial support and missing assurances from funding bodies
- Concerning of local residents about costs, economic efficiency, security, technical problems such as smell and noise, risk of accidents
- Demographic situation within the community (senior may be less motivated and more passive regarding the initiative)