EXPERIMENTAL STUDY CONCERNING THE DISTRIBUTION OF GRANULAR PARTICLE SHAPE FROM A FILTER LAYER

The shape of granular particle from a filter layer represent a determinant factor regarding the efficiency of filtration process. In order to adequately predict the efficiency of granular filters is necessary to know the distribution of granular particle shape from filter layer. This paper presents a small study - in terms of experimental results, but laborious - in terms of sample preparation, regarding the identification of distribution by shape classes of granular particles from a filter layer. For experimental determinations have been used perlite and anthracite - two granular filter materials. It has been analyzed in terms of particle shape 1,000 particles of perlite and 1,000 particles of anthracite taken randomly from each filter layer. It has been observed that spherical particles have an average distribution for two type filter materials

EXPERIMENTAL STUDY CONCERNING THE DISTRIBUTION OF GRANULAR PARTICLE SHAPE FROM A FILTER LAYER

The shape of granular particle from a filter layer represent a determinant factor regarding the efficiency of filtration process. In order to adequately predict the efficiency of granular filters is necessary to know the distribution of granular particle shape from filter layer. This paper presents a small study - in terms of experimental results, but laborious - in terms of sample preparation, regarding the identification of distribution by shape classes of granular particles from a filter layer. For experimental determinations have been used perlite and anthracite - two granular filter materials. It has been analyzed in terms of particle shape 1,000 particles of perlite and 1,000 particles of anthracite taken randomly from each filter layer. It has been observed that spherical particles have an average distribution for two type filter materials

Study About the Perception of Producers from Romania Regarding the Ecolabel

The purpose of this paper is to obtain information about the Romanian producers’ perspective on some key elements regarding the environmental aspects of their company, data on the certification SR EN ISO 14001: 2015 and the ecolabel in Romania. A questionnaire of 25 questions was developed and used for data collection, which was sent between February - April 2017 by email to approximately 531 companies representing the five active sectors in Romania. We received 189 responses that will help us to identify the main issues related to the certification SR EN ISO 14001: 2015, the ecolabel and the environmental aspects of different industries. There is a relatively low interest of companies in assessing environmental performance using independent tools. However, the low percentage of participating companies responding to the questions is relatively small, which shows that companies that really wanted to make a comprehensive environmental management assessment have been looking to answer as many as possible of questions

Developing a green register of Eco-labeled products in Romania

The green products market is growing up fast, but there is still a strong need to provide clear and verified information about their environmental performances in order to create a real consuming preference. The main preliminary results of a market survey conducted in Romania in 2010-2013 within the LIFE+ project -Promoting green products, aimed at evaluating the availability of eco-labeled products and at promoting their use, are presented in this paper. A national Green Register of type I eco-labeled products available in eight main Romanian supermarket chains was implemented and the main technical, environmental and financial characteristics were analysed for each product and product category. While the price difference between eco and non-eco products for the non-electric and non-electrical equipment products is very limited (<1%), for the eco products entailing operational costs it is significant (>13%) and still supports the widespread opinion that green products are more expensive. Further investigation is being carried out to draw a detailed comparison on the "real" costs of green products analysing their possible competitiveness in terms of operational costs an payback periods