Spiru Haret University: Open Journal Systems
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Improvement of wastewater treatment by use of natural coagulants
Get PDFAn activated sludge and other organic sludges from wastewater treatment processes are usually anaerobically digested prior to application on land. The purpose of digestion is to convert bulky, odorous sludges to relatively inert material that can be rapidly dewatering. The important benefit of this process is a biogas production, too. It is proper to enlarge primary sludge production in a primary settler by adding some coagulation aids, with aim to increase a biogas production, as much as possible. The most common coagulant is alum, but presence of large quantities of aluminum salts in sludge has a harmful impact on digestion and digested sludge application. Some natural coagulants, that have a numerous advantages, can be used instead of alum. Natural coagulants could be extracted from a different plant material, and considering the fact that they are of organic nature, the biogas yield can be enhanced by their presence. A plant material that remains after extraction can be used as a feed. The aim of this paper is a consideration of potential environmental benefits of substitution of alum by natural coagulant extracted from common bean seeds in sewage wastewater treatment process
Assessing the changes in drought conditions during summer in the Republic of Moldova based on RegCM simulations
Get PDFWe assess the changes in drought conditions during summer in the Republic of Moldova based on the Standardized Precipitation Index (SPI) calculated from monthly precipitation data simulated by the regional climatic model RegCM3. The RegCM simulations were conducted at a horizontal resolution of 10 km in the framework of EU-FP6 project -CECILIA. The domain was centered over Romania at 46°N, 25°E and included the Republic of Moldova
“Green Pack” in Function of Green Marketing as a Form of Social Responsibility in Serbia
Get PDFGreen marketing is defined as a partnership of all interested stakeholders to sustainable development. This form of marketing is a relatively new form of social responsibility in Serbia and as such it is subject of this paper. The necessity of integration of green marketing in a social responsible behavior is justified by the fact that purely commercial marketing business ignores the possible conflict between short-term desires and long-term benefits of market entities and society, with regard to global environmental problems. The laws are the lower limits of business and the community social responsibility, which includes green marketing, a higher level. Whereas the National Assembly of the Republic of Serbia in May 2009 adopted 16 laws on environmental protection, that is called the “Green Package”. Laws were passed with the aim of regulating the business and social responsibility and green marketing and development. The aim of this analysis is the “Green Package” as a basis for application of green marketing in Serbia. The work will result in efficiencies that are realized by applying the law of “green package” and point to existing gaps
The analysis of the energy intensity of economies by selected indicators of sustainability (Rio+ 20)
Get PDFThe aim of this paper is to analyze the status and the development of energy intensity in selected countries of Central and South-eastern Europe. Reducing of energy consumption is one of the ways to ensure not only economic, but also environmental aspects of sustainability.This paper describes the relationship between economic development and energy intensity of countries, particularly the countries of the selected region
Foreword - (reviewers’ view)
Get PDFIt is indeed a singular honor to be asked to write this Foreword for a prestigious journal like JEDEP that has now come out with its fifth issue. I would like to share a thought that came to me as I was reading the abstracts. When you are presented with a bouquet of flowers all of the same hue and color it is beautiful. But when the flowers are in various colors but yet of the same biological genre this beauty is enhanced. That is true of this issue of the journal and the contribution of the authors as well. To begin with, for a person who has been looking into organizational excellence and business sustainability for the past two decades, this cluster of essays made delightful reading..
Green banking
Get PDFThere is an urgent need to march towards “low - carbon economy”. Global challenges of diminishing fossil fuel reserves, climate change, environmental management and finite natural resources serving an expanding world population - these reasons mean that urgent action is required to transition to solutions which minimize environmental impact and are sustainable. We are at the start of the low - carbon revolution and those that have started on their low - carbon journey already are seeing benefits such as new markets and customers, improved economic, social and environmental performance, and reduced bills and risks. Green investment banks offer alternative financial services: green car loans, energy efficiency mortgages, alternative energy venture capital, eco - savings deposits and green credit cards. These items represent innovative financial products
The Impact of Globalization on Economies of Developed Countries
Get PDFThe concept of globalization is interpreted by various authors in terms of its importance or content. This article presents results of an analysis of the influence of globalization trends on important macroeconomic indicators of selected countries. An examination of the level of globalization as a quantitative marker was enabled by the KOF Index of Globalization, which provides an indication of the economic, political and social globalization at global level. Research methods included time series analysis, trend analysis and nonparametric regression model (regression of panel data)
Values as Motivation Factors of Economic Behaviour
Get PDFThe article presents a reflection on the structure of values functioning as motivators of economic behaviour. Considering the principle of rational egoism the author describes three segments of crucial values, which seem to be fundamental, as a matter of the contemporary Euro-American economic value system – freedom and justice; responsibility and confidence; progress, prosperity and rationality. An important methodological basis of presented reflection is the Ethics of social consequences – dynamically developing consequentialist ethical theory, responding to the challenges arising in the field of applied ethics in the framework of efforts to solve practical problems of today's world
Energy potential of Republic of Serbia as an Investment Opportunity UDK 338.48
Get PDFSerbia has a big potential to accomplish the goal of making the environment green and comfortable for living. It started with reforms in comprehensive Energy Sector and set up a new Energy Policy in accordance with the EU practice and standards. With new national policy, Serbia became aware of middle-term and long-term strategies for developing of adequate Power Sectors. There were investments into the Network and there are plans for building new and expanding existing transforming stations, building new interconnecting line and making some other investments. Having in mind the cooperation with EU, Service for Electrical Energy Market Development has already prepared wide range of available services related to market and deregulation of network, from requirements for connecting to transmission line to securing balance mechanism, and that makes possible for international Electrical Power market to exist. Since the production system is unable to respond to the demand in certain moments of time and Serbia has to import Electrical Energy, that makes Renewable Energy Sources very attractive for use in Power system. Deficit of electrical power must be covered either by import or by more intensive investments in new production capacities, making Serbian energy sector economically interesting