Sawdust

About: Sawdust is a research topic. Over the lifetime, 5526 publications have been published within this topic receiving 86499 citations. The topic is also known as: wood dust & hard wood dust.

Sawdust collection assembly for a compound miter saw

Abstract: A sawdust collection apparatus for a compound miter saw includes a turntable and a sawdust collection assembly. The turntable is rotatably mounted on a base and has a cutting groove defined in the turntable and a sawdust guide communicating with the cutting groove. The sawdust collection assembly has a hollow sawdust duct with a sawdust channel communicating with the sawdust guide and a hollow sawdust entry duct with a sawdust entry port to receive sawdust and debris and a sawdust passage to communicate with the sawdust entry port. The sawdust channel is connected to a vacuum cleaner to efficiently pull sawdust and debris out of the miter saw through the sawdust channel and the sawdust passage.

Removal of Copper from Aqueous Solution Using Orange Peel, Sawdust and Bagasse

Abstract: Orange peel, sawdust and bagasse have been used as adsorbents for the removal of Cu(II) from aqueous solution. The effects of contact time, pH, concentration, dose and ionic strength on the removal of Cu(II) have been studied. Moreover, treated sawdust has been used as an adsorbent for the same. The equilibrium adsorption capacity of the adsorbents for Cu(II) was obtained by Langmuir isotherm. The ionic strength effect on the removal of Cu(II) from its aqueous solution indicated that the removal followed ion-exchange mechanism.

Emissions of monoterpenes an VOCs during drying of sawdust in a spouted bed

Abstract: The central aim of this thesis is to support the efforts to counteract certain environmental problems caused by emissions of volatile organic compounds. The purpose of this work was (1) to develop a method to establish the amount of emitted substances from dryers, (2) to determine the effect of drying medium temperature and end moisture content of the processed material on emissions of monoterpenes and other hydrocarbons, (3) to examine the emissions of monoterpenes during production of pellets, and (4) to examine the natural emissions from forests with an eye to implications for modelling. The measurement method (1) resolves the difficulties caused by diffuse emissions, and also solves the problems associated with high moisture content of the drying medium. The basic idea is to use water vapour to determine the exhaust flow, while a dry ice trap is used both to preconcentrate emitted volatile organic compounds and to determine the moisture content of the drying medium. The method as used in this paper has an uncertainty of 13% using a 95% confidence interval. Emissions from a spouted bed (2) in continuous operation drying Norway spruce sawdust at temperatures of 140°C, 170°C or 200°C was analysed with FID and GC-MS. When the sawdust end moisture content was reduced below 10%wb, emissions of terpenes and volatile organic compounds per oven dry weight increased rapidly. Increased temperature of the drying medium increased the amounts of emitted monoterpenes when sawdust moisture content was below the fibre saturation point. Examination of sawdust and wood pellets from different pellets producers (3) revealed that most of the terpene emissions happened during the drying step, with rotary dryers causing higher emissions than steam dryers. Almost all of the volatile terpenes remaining in wood after drying were released during pelleting. When sawdust with higher moisture content was used in the pellets press, the terpene emissions were increased. Terpenes emitted naturally from vegetation can have an adverse environmental impact. Factors affecting terpene emissions from tree species in Sweden were reviewed (4). Models for prediction of terpene fluxes should include not only temperature but also light intensity, seasonal variation, and a base level of herbivory and insect predation. Prediction of high concentrations of ambient terpenes demand sufficient resolution to capture emission peaks e.g. those caused by bud break.