Life cycle assessment of waste wood used for energy production – Methodology and case studies
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2020)
To assess the sustainability along the whole value chain, life cycle-based methodologies have been developed over the last years. Life Cycle Assessment (LCA) considers environmental impacts along supply chains, from extraction of raw materials to end-of-life of products (ASI 2006). The aim of this paper is to describe the use of LCA to assess the environmental impacts of the use of waste wood for energy production. Important methodological aspects on the use of LCA for the assessment of waste wood are presented using two different case studies from the H2020 projects STORY (Added value of STOrage in distribution sYstems) and TORERO (TORefying wood with Ethanol as a Renewable Output: large-scale demonstration).

Waste2Go – Innovative MSW-Recycling for Production of Chemical Substances
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
About 180 million tons of residual waste is generated each year through households in the European Member States (EU28), which means every citizen produces more than one kilogram per day. Along with the industry the residual waste adds up to circa 2.5 billion tons. Large proportions of municipal solid waste (MSW) are still not recycled in an adequate manner because of the heterogeneity of the unsorted waste.

Closing the Cycle with Wood Ash: Nutrient Utilization in Alpine Forests
© Lehrstuhl fĂĽr Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2014)
Since the 1950s the whole-tree harvesting has led to the removal of high-valuable nutrients such as calcium, potassium, magnesium and phosphorus from the forest life cycle. The current tendency to use biomass as a sustainable and regional energy source results in an increased production of high quality wood ash, which could play a key role in compensating nutrient losses when it is thoughtfully administered to forest ecosystems.

Increasing energy efficiency: A plant manufacturers view
© Wasteconsult International (6/2010)
To increase the energy efficiency of the waste-to-energy plants is the main challenge of each plant manufacturer. This article lists some current trends and picks- up three of them by mean of examples from current Keppel Seghers projects.

Double Dry Lime-based FGC: combining gas cleaning performance with increased energetic efficiency & availability
© Texocon GbR (2/2010)
Unlike in the early days when costs of utilities, chemicals and residue disposal were overall decisive in selecting a type of Flue Gas Cleaning (FGC), at present the energetic performance of WtE-plants needs to be equally considered due to developing EU policy. Particularly in case of waste-fired Combined Heat & Power (CHP/KWK) plants, a highly optimized energy production goes along with strongly increased revenues. The application of WtE-technology within an industrial context thus requires reliable systems that combine high energetic performance with an outstanding availability. As emissions are subject to tight regulation well functioning FGC-systems are an essential part of a WtE-plant to help securing the continuous supply of steam, heat and/or electricity to site-surrounding consumers.

Extensive Environmental Technologies for Treatment of Municipal Solid Waste and Waste Water
© Wasteconsult International (11/2005)
Mechanical and biological treatment has been established as a concept of handling municipal solid waste. The biological process aims to degrade the organic fraction of the waste to a stabilized product through fermentation and rotting processes. The final maturation produces a depositable residual waste.

Decentralized biomass power plant based on pebble-heater technology and hot air turbine
© OTH Amberg-Weiden (6/2002)
The principle objective of the proposed concept is to develop a cheap biomass CHP plant for small capacities (less than 5 MWe). It would enable a decentralised usage of biomass, by locating small units directly at places where biomass originates. To lower the specific investment costs, just proven, cheap and/or standardised components has to be used, like: biomass combustor, radial gas-turbine and Pebble-Heaters with radial fluid flow (regenerative heat exchangers).

Innovative biomass power plant based on pebble-heater technology and hot air turbine
© OTH Amberg-Weiden (5/2001)
The use of biomass for combined heat and power (CHP) production becomes increasingly important. On the one hand it substitutes the usage of fossil fuels like coal, oil or natural gas; on the other hand it is neutral regarding the CO2-emissions into the atmosphere. That is the reason why many countries, especially the EU and the USA have launched very ambitious programs for increasing the usage of biomass, especially for power production.



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