[en] An overview is given of the market for wood wastes in the Netherlands and how this affects the targets to use biomass. Several types of biomass must be imported, not only wood wastes, but also e.g. olive stones and cacao shells

[en] Energy use of wood became ten times higher during the last three years at the Pursiala thermal power plant due to the PUUHA 93-95 project. The delivery of wood chips amounted in 1995 for 115 000 bulk-m³. The proportion of actual forest chips of the total was 80 %. The total amount of delivered wood chips was somewhat over 200 000 bulk-m³. The target price set at the PUUHA project (52 FIM/MWh) was mainly achieved, but the target of the national Bioenergy programme 45 FIM/MWh was obtained only at the most profitable forest chips purchasing targets. The estimated accumulation of income taxes to the rural economy, achievable from the forest chips purchase, was about 3.0 FIM/MWh. During the third year, on the activity level of the PUUHA project, 27 new vacancies were formed. The estimated advantage for the forest economy was 5-6 FIM/MWh due to the thickening of the remaining stems and the decreasing of the forest regeneration costs

[en] This report describes the Emissions Audit carried out on a Biomass Combustor burning treated wood waste at the premises of a furniture manufacturer. The Biomass Combustor was tested in two firing modes; continuous fire and modulating fire. Combustion chamber temperatures and gas residence times were not measured. Boiler efficiencies were very good at greater than 75% in both tests. However, analysis of the flue gases indicated that improved efficiencies are possible. The average concentrations of CO (512mgm^-3) and THC (34mgm^-3) for Test 1 were high, indicating that combustion was poor. The combustor clearly does not meet the requirements of the Guidance Note for the Combustion of Wood Waste. CO₂ and O₂ concentrations were quite variable showing that combustion conditions were fairly unstable. Improved control of combustion should lead to acceptable emission concentrations. (Author)

[en] Tests of co-combustion of wood chips and coal were carried out. Adding coal to high-moisture wood chips favours the combustion of the latter and enables the utilization of fine fractions of coal. To avoid the liquefying of ash and the clinkering of the grate the coal content of fuel and primary air delivery should be kept low. (author)

[en] Short communication

[en] Variations of the fuel prices and uncertainty with respect to the output of the produced energy were reasons not to build a biomass power plant in amsterdam, Netherlands. However, in Cuyk and Lelystad (also in the Netherlands) plans to build a biomass power plant are arranged. A brief overview is given of the arguments based on which it is decided to build such a plant

[en] The paper presents some technical aspects and management issues of wood waste reuse end disposal. It refers to the Greek and European legislation which determines the framework for rational and environmental friendly practices for woos waste management. It refers also to the wood waste classification systems and the currently applied methods of wood waste disposal and reuse. Emphasis is given to the wood waste-to-energy conversion system, particularly to the pretreatment requirements, the combustion techniques, and the environmental constrains. Finally, the decision making process for the investments in the wood waste firing thermal units is discussed

[en] Biomass as a solid fuel is mainly used to cover the low temperature heat demand. Based on a biomass that is offered free of cost and on the spot an economic operation is possible if heat demand over the whole year guarantees a high utilisation factor. For example in Baden-Wuerttemberg the technical energy potential gained from agricultural and forestall recyclings amounts to approximately 7 billion kWh per year. The present experiences of the EVS in Baden-Wuerttemberg reveal that merely the existing recyclings will be able to cover the realistically usable potential of power-heat-coupling plants, the heat demand of larger single consumers as well as the direct heating supply unit the year 2010. (orig./HW)

[en] The Ginoogaming First Nation is working with Long Lake Forest Products to develop a cogeneration plant at a local mill which would burn wood chips and waste wood to produce heat and electrical energy for the mill and the community. The plan is part of a larger development project by the community that calls for the construction of new infrastructure, services and business for the town of 250 people near Thunder Bay, Ontario. It is a widely held view that energy is a major factor in achieving self reliance for First Nations especially in remote communities. Concern was expressed by Ontario Hydro that if the town takes over its own electricity production, Ontario Hydro may still be legally required to maintain back up generation. The preferred remedy would be to lift Ontario Hydro's obligation to provide all power to remote communities of Ontario

[en] Highlights: • A leaching process was studied for metals removal from CCA-treated wood wastes. • This decontamination process was studied at pilot scale (130-L reactor). • Removals up to 98% of As, 88% of Cr, and 96% of Cu were obtained from wood wastes. • The produced leachates can be treated by chemical precipitation. -- Abstract: The disposal of metal-bearing treated wood wastes is becoming an environmental challenge. An efficient recycling process based on sulfuric acid leaching has been developed to remove metals from copper-based treated wood chips (0 < x < 12 mm). The present study explored the performance and the robustness of this technology in removing metals from copper-based treated wood wastes at a pilot plant scale (130-L reactor tank). After 3× 2 h leaching steps followed by 3× 7 min rinsing steps, up to 97.5% of As, 87.9% of Cr, and 96.1% of Cu were removed from CCA-treated wood wastes with different initial metal loading (>7.3 kg m⁻³) and more than 94.5% of Cu was removed from ACQ-, CA- and MCQ-treated wood. The treatment of effluents by precipitation–coagulation was highly efficient; allowing removals more than 93% for the As, Cr, and Cu contained in the effluent. The economic analysis included operating costs, indirect costs and revenues related to remediated wood sales. The economic analysis concluded that CCA-treated wood wastes remediation can lead to a benefit of 53.7 US$ t⁻¹ or a cost of 35.5 US$ t⁻¹ and that ACQ-, CA- and MCQ-treated wood wastes recycling led to benefits ranging from 9.3 to 21.2 US$ t⁻¹