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.

Physicochemical characterization and pyrolysis kinetics of wood sawdust

Abstract: In this work, physicochemical characterization of wood sawdust (WSD) has been carried out and kinetics of its pyrolysis has been studied. The physiochemical properties such as proximate and ultimate analysis, lignocellulosic composition, heating value and thermal analysis of WSD have been carried out. The activation energy of the pyrolysis of WSD has been calculated by model-free Kissinger–Akahira–Sunose, Ozawa–Flynn–Wall methods and the average values are found to be 164.24 kJ mol−1 and 173.41 kJ mol−1, respectively. Coasts–Reforn method has been used to calculate the pre-exponential factor and reaction order. The predicted degree of conversion of WSD due to heat treatment is found to be in good agreement with experimental conversion data. Physicochemical properties and kinetic parameters support the good potential of WSD as pyrolysis feedstock.

Decorative sheet or molding comprising fibers and fillers and process for its production

Abstract: A decorative sheet or a molding, in particular suitable for indoor or outdoor applications on buildings, is in each case composed of a single- or multi-layer core, monolaterally or bilaterally laminated with decorative layer(s) The core layer(s) comprise(s) wood fibers, cellulose fibers, or timber sawdust products and also an organic or inorganic filler material, and a hot-curing resin. The particle size of the filler material is smaller than the thickness of the fibers or of the timber sawdust products in the core layer(s). These core layer(s) are composed of from 15 to 80% by weight of fibers or of timber sawdust products, from 10 to 75% by weight of filler material, and from 10 to 50% by weight of resin, based in each case on the total weight of the core layer(s).

Benzophenone biodegradation and characterization of malodorous gas emissions during co-composting of food waste with sawdust and mature compost

Abstract: Benzophenone (BP) and its derivatives are extensively used as ultraviolet filters in modern society and increasingly being released into the environment. Co-composting of food waste with sawdust and mature compost was successfully demonstrated to treat high BP concentration (927 ± 229 mg kg−1), with a removal efficiency of 97% after 35 days of incubation. The highest biodegradation rate of 55 mg kg−1day−1 was observed at the thermophilic stage. The biodegradation followed second-order kinetics, and the half-life of BP was 1.3 days during the co-composting process. Additionally, malodorous gas emissions from the co-composting process were also analyzed. The malodorous compounds, including ammonia (NH3), hydrogen sulfide (H2S), and volatile organic sulfide compounds (VOSCs), peaked at the thermophilic phase. NH3 and H2S were the main components contributing to 92% and 7.6% of the total malodorous concentration (617 ppm). Dimethyl disulfide (28.9 ppb) and dimethyl sulfide (23.5 ppb) concentrations accounted for ∼ 58.9% of the total VOSC emitted. The malodorous emissions were positively correlated with temperature, pH, and negative with oxygen content during the co-composting. Sawdust and mature compost enhanced oxygen penetration in the compost mixture and thereby reduced odor emission. These results support that co-composting could be a technically and economically feasible treatment technology for the degradation of BP and can be used to treat other emerging organic pollutants.