Flax stems were subjected to microwave drying at controlled temperatures. The rate of drying was then compared with conventional hot air drying. The product temperature was maintained at 40°C, 60°C and 80°C for both microwave and hot air drying. The moisture content of flax stem was about 70% (wet basis). The microwave drying was conducted in a microwave apparatus which recorded mass, product temperature, incident microwave power, reflected microwave power and inlet/outlet air temperature. The final moisture content for experiment was set to 9% (wet basis). Microwaveconvective drying ensured about 30% to 70% reduction of drying time for drying flax straw as compared to hot air drying. Curve fitting with different mathematical models were carried out and all the models were fitted well for both hot air and microwave drying. The tensile strength of flax straw, measured with an Instron apparatus, increased with an increase in the processing temperature of both processes. Hot air dried flax straw showed the greatest tensile strength and modulus of elasticity at processing temperatures of 60°C and 80°C with a significant difference.
- Inderscience Publishers
- Effect of microwave and hot air drying on flax straw at ...
AQMesh used to measure local air quality at Surrey school
Cleves School in Weybridge, Surrey (UK) has used AQMesh to measure pollution at the primary school’s entrance. The project, led by Dr. Edward Salter over the school’s summer term, aimed to understand exposure of the children (aged 7-11) to dangerous pollutant gases, with particular interest in the levels of nitrogen dioxide (NO2) and ozone (O3). Initial findings showed that levels of O3 exceeded 100µg/m3 on several occasions during the high temperatures in June, and a daily pattern of gas peaks...
AERMOD View™ - Gaussian Plume Air Dispersion Model - AERMOD Release Notes Versions 9.3, 9.4, and 9.5
Receptor Pathway Sensitive Receptor Summary Report Modelers can now flag discrete receptors as Sensitive, and AERMOD View will produce a Sensitive Receptor Summary Report which details concentrations at the flagged receptors. This is useful when needing to quickly find concentrations at specific receptors. Tile Maps Updates to Open Cycle Maps The Open Cycle Maps server was updated to reflect the most up-todate server settings and map hosts. Please, donwload AERMOD Release Notes pdf below.
Dry Air Scrubber for Propylene Oxide
Background For decades, Advanced Air Technologies, Inc. has been the leader in air scrubber technology for abatement of Ethylene Oxide (EtO) emissions. In fact, AAT, Inc. was founded in 1987 on a unique dry scrubbing, chemi-sorption process for EtO. The result is a series of fixed bed “Safe-Cell II” dry scrubbers, consisting of the DR-490, DR-50, and DR-MAC-150. The DR-490 is the staple for commercial scale aeration exhaust, while the DR-50 is used on exhaust from small hospital sterilizers....
Numerical modelling of air-water flows in sewer drops
The presence of dissolved oxygen (DO) in water flows is an important factor to ensure the aerobic conditions recognised as beneficial to preventing the occurrence of detrimental effects. The incorporation of DO in wastewater flowing in sewer systems is a process widely investigated in order to quantify the effect of continuous reaeration through the air-liquid interface or air entrained due to the presence of singularities such as drops or junctions. The location of sewer drops to enhance air entrainment and...
Degradation kinetics of organic dyes in water by high voltage atmospheric air and modified air cold ...
High voltage atmospheric cold plasma (HVACP) is a novel, non-thermal technology which has shown potential for degradation of various toxic components in wastewater. In this study, HVACP was used to examine the degradation kinetics of methyl red, crystal violet and fast green FCF dyes. HVACP discharge was found to be a source of reactive nitrogen and oxygen species. High voltage application completely degraded all dyes tested in less than 5 min treatment time. Plasma from modified gas (∼65% O2) further reduced the...