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BrewerпїЅs spent yeast is a byproduct containing high amounts of nitrogen, vitamins and immunogen compounds such as ?-glucans. Several uses of spent yeast were described, but the phytostimmulatory potential was not previously tested. In the present paper, the effects of spent brewery yeast on rye microgreen growth and composition and the potential use as an elicitor is assessed. Rye microgreens elicited with spent yeast presented improved germination, especially after 4 days of cultivation. Increased plantlet leng...

The objective of this research is to study in laboratoryпїЅs materials such as: cationic bituminous emulsions, aggregates, fly ash, etc., in order to develop optimal and appropriate mix formula for "cold" waste asphalt recycling with the addition of slow breaking cationic bituminous emulsions, fly ash, cement and natural aggregates. The purpose of this approach is to obtain an "optimal combination" comprising the above-mentioned materials as well as the mixing of the wear layer on the surface of the road on which ...

This contribution describes developments in the area of plastic recycling aimed at the reuse of waste materials for the manufacture of a useful product. Throughout development of the concept пїЅmodular flood barrier structureпїЅ, the recovery of plastic materials was assessed, primarily, plastic waste from automobiles and industry. The investigators filed a utility model application, no. SK 5847 Y12, entitled пїЅModular flood barrier structureпїЅ. Terms of the type and composition of source material, polypropylene...

Due to the increased demand and supply shortage, neodymium is listed as critical raw material of the strategic importance in many countries in the world. From this point of view the researches for the development of recycling technologies for this metal are strongly justified. The paper presents the results of laboratory research on the hydrometallurgical recycling of neodymium from hard disk drivers (HDDs). Neodymium magnets are the elements of a positioner which drives the head of the HDD. The study material- si...

Tailings ponds are permeable hydrotechnical structures for retention purposes, specifically designed for safely dumping mining waste from mining operations and for evacuating fluid tailings from mining sites. Tailings ponds are grouped in classes according to their type, intended service life and function at the mining site. Another important criterion of classification is the terrain where the tailings pond is situated. Tailings or mining waste can be defined as the commercially worthless fraction or the waste ma...

Recycling - the process of transforming waste into new materials - represent a modern alternative for eliminating waste and reducing emissions of greenhouse gases. Recycling - part of the 3Rs (Reduce, Reuse, Recycle) in the hierarchy of waste пїЅ helps to reduce the consumption of raw materials and to reduce energy consumption, air pollution (in phase of combustion waste) and water (in phase of waste storage). Among the recyclable materials such as glass, paper, plastic, metal, textiles are used tires. These tires...

Following mining and processing activity, results a significant amount of mining wastes, in the form of sterile mineral. These wastes are stored largely in mining tailing ponds or heaps. The chemical composition of the sterile material depends from one mining site to another. For long time worldwide, tailing deposits were considered waste deposits, without the possibility of future use. A few of the negative effects on the environment my constructing and exploiting mining tailing ponds, heaps, landfills, are the d...

As direct consequence of the urban development, waste management is a multidimensional issue that incorporates political, institutional, social, environmental, and economic aspects. The paper aims to analize the efficiency of waste management strategy, implemented in the town of Boto?ani. It is also considering, the populationпїЅs level of education and perception, regarding selective collection and the quality of public Sanitation Services. Boto?ani is a second rank town (the most important in Boto?ani county), l...