Metal connectors in waste wood-based materials should be removed before reused. A multi-channel metal connector detecting system is presented, detecting the metal connectors in waste wood-based materials. It include three parts: a high precision sensor for detecting metal connectors in waste wood-based materials, a multi-channel data logging and processing system based on microcontroller unit, ...

This project evaluated the cost effectiveness and feasibility for recycling of renewable resources and disposing of non-recyclable materials generated in the perfusion department of an open heart surgery program. Forty-one adult and pediatric open heart cases were randomly assigned to participate as the control or the recycling group. The control group had no separation of materials. In the rec...

The increased interest in solar power over the last few decades has led to a constant development of existing and new types of solar cells. One type of solar cell that is making advances on the global market is copper indium gallium diselenide (CIGS) thin film solar cells. The advantage of thin film solar cells is that they require less semiconductor material than conventional silicon solar cel...

Hydrogen is a valuable gas as a clean energy source and as feedstock for some industries. Therefore, demand on hydrogen production has increased considerably in recent years. Electrolysis of water, steam reforming of hydrocarbons and auto-thermal processes are well-known methods for hydrogen gas production, but not cost-effective due to high energy requirements. Biological production of hydroge...

The effective waste heat recovery is one of the present-day challenges in the industry and power engineering. The energy systems dedicated for waste heat conversion into electricity are usually characterized by low efficiency and are complicated in the design. The possibility of waste heat recovery via thermoelectric materials may be an interesting alternative to the currently used technologies...

Landfill sites are becoming over crowded and expensive for waste disposal, efforts are made to minimize the quantities of materials that are delivered to landfills. The threat due to leaching of non-biodegradable materials like waste plastics, scrap tyres. e-waste may contaminate the soil and ground water. If the production of waste cannot be prevented, then it is attractive to create an altern...

Waste plastics are harmful, toxic, and non-biodegradable. Environmental impacts of waste plastics are raised concern about all over the world for safe and friendly environment. Due to dense population and environmental effects of the major city in the world dumping, incineration and land filling are faced difficulties and challenges. At this circumstances vast of waste plastics are remained vul...

The main disadvantage of biodiesel is its high price. The price of biodiesel depends on various factors such as the price of oil, methanol, catalyst, and labor. Among dif-ferent economic factors, oil accounts for the largest share of input costs of biodiesel production. In this study, first, suitable heterogeneous catalysts were identified for biodiesel production. Several studies were carried ...

I ssues pertaining to the disposal of surgical waste are seldom discussed in the dermatologic surgery literature. Management of surgical waste as pertaining to the surgeon includes proper disposal of sharps in appropriate containers as well as proper handling and disposal of infectious nonsharp materials. Attention should be paid to two particular issues. First and foremost is to minimize the r...

The kinetics of Cu(II) transport through a bulk liquid membrane with different membrane materials was investigated in this work. Three types of membrane materials were used: fresh cooking oil, waste cooking oil and kerosene, each of which was mixed with di-2-ethylhexylphosphoric acid (carrier) and tributylphosphate (modifier). Kinetic models derived from the kinetic laws of two consecutive irre...