Abstract The paper proposes the use of microwave irradiation to lower initial moisture content wood chips. study involved willow and fir chips fractionated by means a sieve separator unfractionated ash were exposed constant power 800 W for 30 s, 60 120 s 180 s. weighed before after measure loss moisture. It was found that decline in increased with chip size given time power. not significantly a...

We investigated the removal of nitrogen and phosphate from the effluent of a sewage treatment plant over a long-term operation in bioreactors packed with different combinations of wood and iron, with a trickling filter packed with foam ceramics for nitrification. The average nitrification rate in the trickling filter was 0.17 kg N/m3∙day and remained at 0.11 kg N/m3∙day even when the water temp...

The survival of two hygienically relevant bacteria, Escherichia coli pIE639 and Enterococcus faecium, was followed on wooden sawdust of seven different European woods (pine, spruce, larch, beech, maple, poplar, and oak) versus polyethylene chips by using cultivationdependent and molecular-based methods in parallel. The survival of the bacteria on wood was dependent on various factors such as th...

Torrefaction is an effective pretreatment method to improve the uniformity and quality of lignocellolosic biomass before further thermal processing (e.g., gasification, combustion). The objective of this study was to determine the impacts of torrefaction as a pretreatment before liquefaction. Wood chips were torrefied for 2 h at three different temperatures (230, 260, 290 °C) and then subjected...

spawn quality plays an important role in successful production of medicinal mushrooms. in this study, firstly, to determine the optimum temperature for mycelia growth of g. lucidum, four basal media, including seeds of wheat, barley, millet and abies sp. wood chip were studied separately at 25±1˚c and 29±1˚c. in the second section, in order to achieve suitable the mycelia growth, barley, wheat ...

An experiment has been conducted to evaluate the additional dose reduction by clear felling contaminated forestry in Fukushima Prefecture, Japan, and using the timber to cover the areas with wood chips. A portable gamma spectrometry system, comprising a backpack containing a 3 × 3″ NaI(Tl) detector with digital spectrometer and GPS receiver, has been used to map dose rate and radionuclide activ...

Hot water extraction (HWE) prior to pulping of wood is a promising method in constructing a platform for traditional pulping or for biorefinery processing. In this study, HWE of aspen wood at a maximum reaction temperature (Treaction) between 140 and 180 oC was investigated to obtain an optimal extraction condition for wood-derived products. The effect of extraction temperature and reaction tim...

Denitrifying bioreactors can be effective for removing nitrate from agricultural tile drainage; however, questions about cold springtime performance persist. The objective of this study was to improve the nitrate removal rate (NRR) of denitrifying bioreactors at warm and cold temperatures using agriculturally derived media rather than wood chips (WC). Corn ( L.) cobs (CC), corn stover (CS), bar...

Nacrtak An experiment on comminution of logging residues with a tub grinder was carried out in order to calculate the productivity and procurement cost of wood chips. At the investigated site, the tub grinder had a hammer mill crusher at the bottom of the tub, and a grapple loader and a bucket loader worked as auxiliary machines for the grinder. As a result, the productivity of the tub grinder ...

The importance of play for the healthy development of children is clear. Safe and accessible playgrounds give children the opportunity to challenge themselves and develop physically, mentally, and socially. In the article by Allen et al in the current issue of Pediatrics, the authors assessed more than 450 playgrounds in Chicago to identify hazards and compare the number and safety of the playg...