Papers by Keyword: Wood Waste

Abstract: Indonesia has implemented co-firing as a step for renewable energy utilization. Power plants in Northern Java could utilize wood waste from surrounding wood processing industries as co-firing fuel. In this study, wood waste with high value of ash fusion and stock coals of power plant were used as samples. Blended coals from stock coals are selected based on calorific value, slagging-fouling-abrasion prediction, and softening temperature prediction. Selected blended coals are mixed with wood waste in percentage of 10 wt% to 90 wt% to produce co-firing fuel which then predicted for risk tendency of slagging-fouling-abrasion by theoretical indices. The result shows that the addition of wood biomass increases the slagging, fouling, and abrasion tendency. In this study, addition of 20-30 wt% wood waste to blended coals can still be recommended with the medium risk of slagging-fouling and low risk of abrasion tendency.

Abstract: Gasification is a green technology, which produces combustible gas mixture from solid biomass by partial oxidation at elevated temperatures. Synthesis gas, the desired product of such technology, has more uses than the solid biomass. In this study, a locally developed pilot scale fixed-bed downdraft biomass gasifier was examined. Several gasification experiments using mixed wood wastes (generated from the utilisation of various wood species for making furniture) as feedstock was carried out under varied operating conditions to ascertain their effects on the syngas produced in the process. The effects of grate temperatures and biomass moisture levels on rate of biomass consumption and produced syngas quality were examined via several gasification experiments. The performance of the biomass gasifier system was evaluated in terms of syngas composition, lower heating value, syngas yield and carbon conversion efficiency. The results obtained revealed an average syngas yield of 1.77Nm³ per kg of wood waste consumed. The averaged molar syngas composition obtained was 28.15% CO, 16.64% H₂, 6.19% CO₂, 2.54% CH₄ and 45.42% N₂, while the average syngas LHV was 6.23MJ/Nm³. These results were compared with those published in literature.

Abstract: In this paper, studies were carried out on sorption purification under dynamic conditions of a copper (II) ions model solution with sorption material. Sorption material was obtained by low-temperature pyrolysis from wood wastes. Studies were carried out for fractions with particle sizes less than 0.5 mm, 0.5-1 mm, 1-2 mm, 2 and more mm. Test model solution was a polydisperse system with particle sizes from 145 to 224 nm and 6450 to 8640 nm. Particle size of disperse phase of filtrate after passing through sorption material with particle size of 1-2 mm was in the range from 310 to 412 nm and from 2260 to 3300 nm. Peaks of particle size intensity in the filtrate after passing through the sorbent (fraction 1-2 mm) were shifted downward. This indicates that smaller particles remained in the filtrate after purification. This is confirmed by an increase in the sorption rate of copper ions. As the particle size increases, the filtration rate increases, but the efficiency of removing copper ions decreases. The degree of sorption of copper ions from the model solution with an initial concentration of 1028 mg/dm³ was 96.4% for the fraction of the pyrolysis product with a particle size of 1-2 mm, 91.9% - less than 0.5 mm, 91.1% - 0.5-1 mm, 91.7% - more than 2 mm.

Abstract: The article presents resource and energy saving environmentally friendly technology for efficient processing of wood waste (chipped wood, sawdust) into chemical fibers, such as lyocell type, compatible with the entire spectrum of natural and synthetic fibers, as well as having stable durability and reliability in the manufactured materials. The optimal parameters of the NMMO solvent were determined to achieve the minimum viscosity of the spinning solution. It has been given that it can be used for wear of the materials produced. The spinning solution was chosen for the NMMO solvent.

Abstract: The article considers contemporary methods and especially recycling of wood waste. The volume of wood waste is constantly growing due to the increase in the number of buildings subject to demolition or dismantling, reconstruction and repair works. The article contains the main requirements to the raw material derived from waste. Advantages of products made from wood-polymer composite materials on physic mechanical parameters. The comparative characteristic of cost for the production of wood-polymer plastic. It is noted that production made from wood polymer composite materials has unlimited product range, including boards, various profiled molded and moulded details with complicated shape (the board for the floor, skirting board, baguette, etc).

Abstract: For the purpose of preparing stern bearings adapted to water-lubricating environment to replace natural lignumvitae, preparing bearings with solid lubricant of electromechanical equipment applied in some industries such as textile, food and healthcare to replace sintered bronze, and preparing advanced automotive upholstery, appliance and artware to replace natural rosewood and ox bone, three published patents including “a preparation method of artificial lignumvitae” were used to prepare artificial lignumvitae with a better wear resistance than natural lignumvitae. As the materials for sliding bearing, the main performance of artificial lignumvitae meets the requirement for sintered bronze FZ2365. It explores a new way to develop functional biomass materials with wood waste in urban and rural area while ensure its high quality and cleanness.

Abstract: Energy production from previously unused wood waste, which is produced by mining and manipulation in forestry, wood processing plants and in plants and also more efficient energy recovery firewood in the total amount of about 500 000 t, can annually replace the same amount of brown sorted coal. This has a significant national- economic importance in saving precious fuel but the financial effect greatly exceeding the environmental- ecological benefits resulting from the reduction of environmental burdens, exhausts and incombustible solid residues. These are only a few advantages and also the reasons why it is necessary especially at present days to deal with biomass and wood waste as well. The article therefore outlines a comparison of the previous use of this energy source as well as its possible future development.