scholarly journals Towards a sustainable approach to wastewater treatment strategy for eutrophication abatement

2018 ◽  
Vol 45 ◽  
pp. 00056 ◽  
Author(s):  
Elena Neverova-Dziopak

Eutrophication is one of the consequences of the negative anthropogenic impact on aquatic ecosystems. It leads to the degradation of both sweet and marine ecosystems, constituting a kind of secondary pollution of waters, which disturbs all types of their use. Undertakings related to preventing the negative effects of eutrophication are mainly conducted towards reducing the loads of nutrients introduced into surface waters and controlling the entire conditions in aquatic ecosystems in order to limit the development of aquatic vegetation. The increasingly restrictive legal requirement regarding the content of nitrogen and phosphorus in wastewater discharged into recipients enforces the application of expensive treatment technologies, and the public is becoming more aware of the rising costs of water and wastewater fees. In addition, wastewater treatment is a factor which has a negative impact on air quality due to greenhouse gas emissions and generates other environmental problems. The challenge for facilities, however, is determining which treatment alternatives will best meet their needs, both technically and financially, and to choose the most sustainable path. The problem of establishing a reasonable level of nutrient removal from wastewater, justified from an ecological and economic point of view is discussed in the paper.

2020 ◽  
Vol Vol. 36 (No. 2) ◽  
pp. 71-77
Author(s):  
Katarina Haviernikova ◽  
Janka Betakova

Small and medium-sized enterprises (SMEs) in developed countries represent an important part of their economic environment. They belong to accelerators of economic development in regions and countries. One of the specifications of SMEs is that they allow people to learn to use their own entrepreneurial skills. Thus, the success of SMEs depends on the skills of the person who is responsible for business management in the enterprise. Without skilled and competent managers no activity will be performed effectively. The development and changes in the economic environment, in which SMEs operate, cause the various reversals connected with uncertainty and the resulting risks. A competent person (owner/manager) in SME will need to anticipate these risks and develop appropriate mitigation and strategies for them. The owner/manager of SME should consider the fact, that there could be deviations in the realization process against the planned goal. This deviation presents the risk and the representative of SME should know, how it is possible to manage this risk. It means to reduce its negative impact. The lack of knowledge is a fundamental problem in the failure of most initiatives in the SMEs and the lack of experience can become a major risk to business survival. The goal of owners/managers in SMEs should be to reduce the possible errors and risks in that way that the SME gets into a situation in which it can anticipate changes, and it is able to respond to them and exploit them to their advantage. Each SME is unique and the risk may occur differently in comparison with other SMEs. Risk management and mitigation of risk are important to ensure the security of the company and its continuous development. The risk management in SMEs is perceived as a means of the improvement of SMEs’ success in their activities, due to the fact, that in most cases the unpredictable situations represent a serious loss-making exposure for the SMEs business sector which leads to the loss. For those SMEs whose capital base is insufficient, they can have catastrophic consequences in the case of realized activities, and they can lead to financial losses and subsequently to possible bankruptcy. For this reason, risk management is a prerequisite for minimization of the negative effects of unexpected situations. Still, a lot of SMEs rarely carry out process-related activities risk management. It is affected by limited resources (financial, human), which SMEs have, and which process risk management. There is a wide range of studies focused on risk management in SMEs, but only several of them are focused currently on the responsibility for risk management. This paper contributes to the dissemination of knowledge about the responsibility for risk management in SMEs and provides wider analysis in ways of responsibility for it. To reach the main of the paper, questionnaire surveys among 1018 Slovak SMEs were conducted. We compared the responsibility for risk management in SMEs between two groups of SMEs – technological and tourism from the point of view of sized category, and regional of SMEs. For the evaluation of differences and dependencies among three groups of respondents’ answers, according to their size category, economic branch in which they operate, and regional location, the Chi-square test was used. The associations among respondents’ answers were evaluated through Cramer’s V. The results showed the differences in responsibility for risk management among Slovak SMEs. The results of this study may provide implications for subsequent research focused on responsibility for risk management in the wider context.


2019 ◽  
Vol 11 (2) ◽  
pp. 314 ◽  
Author(s):  
Antonio Nesticò ◽  
Maria Rosaria Guarini ◽  
Pierluigi Morano ◽  
Francesco Sica

The second half of the 20th century was characterized by rapid growth of the urban population and lack of attention to environmental quality in the urbanizes territories. Thus, the development of many cities during that period took place through policies which, over time, resulted in a disaggregated landscape, both in morphological and functional terms. In some cases, these policies have caused the creation of land portions without a specific characterization, and the generation of urban voids that negatively affect the city’s development. To solve this problem, the public administration sectors of many countries are looking for new intervention strategies that are feasible from a social and economic point of view which are able to guarantee sustainable development. From this perspective, the execution of urban regeneration initiatives, including forestation, allows for the improvement of both environmental quality and citizens’ well-being, and promotes economic development. Considering the multiple effects that these initiatives can generate and the limited availability of public and private resources, it is appropriate to use multi-criteria decision support tools through which it is possible to evaluate the interventions’ complexity and best identify the city areas that lend themselves to be recovered and improved through the forestation. The aim of this work is to develop a support tool for public administrations aimed at identifying the optimal forestry projects’ location according to criteria that not only refer to financial type, but also their social, cultural, and environmental nature. Using Discrete Linear Programming algorithms, the model has been tested through a theoretical case study and reveals the advantages and limitations of the model, as well as future research prospects.


1995 ◽  
Vol 32 (11) ◽  
pp. 85-95 ◽  
Author(s):  
Hassaan A. Abd El Gawad ◽  
J. H. C. Butter

In 1993 the Governorate of Fayoum completed its master plan for wastewater management. The master plan presents a staged implementation schedule for the development of wastewater facilities for the Governorate, covering needs up to the year 2020. The targets are ambitious: in order to meet sanitary health standards, nearly two million people (or 60% of the total population) living in 70 towns and villages would need to be served with sewerage systems. Providing all these areas with separate wastewater treatment plants would be impractical. The centralization of treatment at a limited number of treatment plants for clusters of towns and villages has advantages in terms of manageability, cost and environmental protection. In the master plan the configuration of these clusters is presented. For that purpose a stepped approach has been developed: an approach in which aspects such as construction and operation costs of the facilities, existing infrastructure, the geography of the governorate, environmental impact, alternative treatment technologies and phasing of implementation have been considered. An important element of the stepped approach is an analytical model with which - from financial point of view - the optimum size of a cluster can be estimated. Variables of the model are sizes of towns and villages, distances and treatment technologies. The output of the model is a set of general design criteria which has been applied to the specific situation in the governorate. The model has contributed to the establishment of the Master Plan for Wastewater: a plan now used by the Fayoum Sanitation Department as a framework to initiate new projects and to direct the activities of other agencies working in the sanitation sector in the governorate.


Author(s):  
Nils Braakmann ◽  
Joachim Wagner

SummaryWe use unique rich data for German manufacturing enterprises to investigate the product diversification - firm performance relationship.We find that an increase in the degree of product diversification has a negative impact on profitability when observed and unobserved firm characteristics are controlled for. The effects are statistically significant and large from an economic point of view. This helps to understand the fact that nearly 40 percent of all enterprises with at least 20 employees are single-product firms according to a detailed classification of products, and that multi-product enterprises with a large number of goods are a rare species.


Author(s):  
Koen Bruynseels

Abstract Synthetic biology, as an engineering approach to biological systems, has the potential to disruptively innovate the development of vaccines, therapeutics, and diagnostics. Data accessibility and differences in data-usage capabilities are important factors in shaping this innovation landscape. In this paper, the data that underpin synthetic biology responses to the COVID-19 pandemic are analyzed as positional information goods—goods whose value depends on exclusivity. The positionality of biological data impacts the ability to guide innovations toward societally preferred goals. From both an ethical and economic point of view, positionality can lead to suboptimal as well as beneficial situations. When aiming for responsible innovation (i.e. embedding societal deliberation in the innovation process), it is important to consider hurdles and facilitators in data access and use. Central governance and knowledge commons provide routes to mitigate the negative effects of data positionality.


2018 ◽  
Vol 14 (6) ◽  
pp. 415-427 ◽  
Author(s):  
Joseph V. Pergolizzi, Jr, MD ◽  
Robert Taylor, Jr, PhD ◽  
John Bisney, MA ◽  
Jo Ann LeQuang, BA ◽  
Robert B. Raffa, PhD ◽  
...  

Opioids affect the central nervous system and are known to produce dizziness, sleepiness, mood changes, and other actions that in some people have a negative impact on psychomotor or mental performance. The negative effects can be exacerbated in persons who are taking other prescription medications or illegal substances. Opioid-abusing drivers clearly represent an unnecessary danger to the public; although the vast majority of patients taking prescription opioids for pain safely drive to work and other activities, a subset may be impaired, but not be aware of or recognize the problem. The majority of pain patients would likely be surprised to learn that the legal systems in most parts of the world, including most states in the United States, do not differentiate between a pain patient taking a prescribed opioid at the right dose and frequency, and an abuser taking an illegal drug. For example, in some parts of the United States, a driver may be initially stopped for a relatively minor offense and, if the officer notices that the driver is wearing a fentanyl patch, charged with driving under the influence of drugs (DUID). The present narrative review attempts to highlight the existing problem, the different legal thresholds for arrest and prosecution for DUID, and the challenge of trying to have zero-tolerance for driving under the influence of a drug used illegally, while at the same time not arresting legitimate patients who are taking pain medication as prescribed. There is a clear and present need for an integrated assessment and addressing of the current confounding situation.


2016 ◽  
Vol 11 (2) ◽  
pp. 260-265
Author(s):  
P. Balmér

Economic data from 40 years of operation of three regional wastewater treatment companies have been compiled and analysed. The transport systems consist mainly of gravity flow tunnels with lengths of 55–120 km. In spite of the heavy initial investments <20% of the cumulative total costs can be allocated to the transport systems. The treatment plants all remove 90% or more of the influent Biological Oxygen Demand (BOD) and phosphorus and 65–80% of the nitrogen. The wastewater treatment is responsible for about 90% of the cumulative operation costs while the transport system is responsible for 20–40% of the cumulative capital costs. Over time the cost of the transport systems has decreased considerably and is after 40 years of operation only 4–13% of the total costs. Although the main benefit of the regional solutions has been the transfer of wastewater from sensitive inland streams and lakes, the data presented give strong evidence that the regional solutions also has been advantageous from an economic point of view.


2016 ◽  
Vol 12 (5) ◽  
pp. 1451 ◽  
Author(s):  
Laura Sánchez Pulido ◽  
Natalia Daries Ramón ◽  
Eduard Cristóbal Fransi

Purpose: The present work seeks analyze the profitability and the financial situation of the main Catalan alpine ski resorts, with the objective to check if these are sustainable from an economic point of view, taking into account the external factors that affect him.Design/methodology: With the objective to carry out the study of profitability and financial situation, we obtained the financial states of the main Alpine ski resorts of the Catalan Pyrenees: Baqueira-Beret, Masella, Boí Taüll, Vallter 2000, La Molina, Vall de Núria and Espot Ski-Port Ainé, for the periods comprised between 2011-2015 and we proceeded to apply a series of economical and structural ratios with the purpose of establish a diagnostic on his situation.Findings: The results show that the Baqueira-Beret and Masella resorts are the only that obtain profits, whereas the rest of resorts obtain losses in all the periods analyzed. With regard to the financial situation, the results reveal that the level of indebtedness of the resorts is, in general reduced, arriving to the conclusion that the majority of them are not sustainable from a strictly economic point of view.Research limitations/implications: The main limitations of this work are on the one hand that the conclusions are obtained from a period of analysis of five years (2011-2015), and the second, they are circumscribed to a determinate region.Practical implications: The results of this work can help to take decisions so much to the ski resorts managers as to the public administrators for implementing strategies to achieve diversify the offer and improve the results.Social implications: Nowadays the majority of the ski resorts have been rescued or purchased by the Administration. We can deduce that it keeps by the incomes that generate his existence. That is to say, by the positive externalities that generates in the territory where they are situate.Originality/value: The present research focuses in the financial study of a little studied sector as they are the ski resorts and the snow tourism with the enormous importance that has in the economy of the region and in the territorial development. The agents interested are so much the public administrations like the managers of this type of firms.


2019 ◽  
Vol 2 (2) ◽  
pp. 42
Author(s):  
Krzysztof Jarosiński ◽  
Benedykt Opałka

The risk of financing of public investments is a phenomenon that accompanies development processes in a permanent manner. Investments in the public sector are generally characterized by relatively long implementation cycles and involve significant capital expenditure and the necessity of often parallel running a large number of investment projects. In the processes of this type of investment a specific risk category of financing of this type of investment is quite often taken into account, given that such projects are financed mainly from budgetary resources: the state budget and self-government budgets. Economic practice indicates an importance of the proper selection of the method of the financing of new investments and taking into account new funds from various sources. This situation is often the result of a shortage of budgetary resources from which public investments could be financed. There may be difficulties in financing investments resulting from the emergence of a risk of budgetary deficit and the public debt. This risk may have a negative impact on investment decisions and may adversely affect the future course of ongoing investment projects. The purpose of the paper is to undertake studies on the conditions of financing investments from the point of view of the possibility of budget deficit and public debt and the impact of changes in the financial situation on the overall level of risk of public investment. The text is an invitation to undertake a broader discussion on financing public investments in conditions of limited public financial resources.


2020 ◽  
Vol 9 (2) ◽  
pp. 145
Author(s):  
Qi Ji

China’s “industrial restructuring” has expanded the proportion of the tertiary industry in the economy and promoted the development of local tourism. The ongoing “industrial structure upgrading” is intended to make the industry bigger and stronger, which will promote the growth of local tourism. As a tourist resort, nature reserves have been attracting a large number of tourists and have great development potential and economic value. Under this situation, various management agencies of nature reserves have successively carried out tourism activities and carried out tourism development and construction. However, there is no doubt that both tourism activities and development will have an impact on the ecological system of nature reserves. The existing legal system of nature reserves in China emphasizes the prohibition of behaviors that directly destroy the ecological environment and ignores the impact of human tourism activities. The continuous increase in the number of tourism in our country, brought on nature reserves of rich tourist income at the same time, a large number of facts show that tourism has become a source of environmental pollution, so it is necessary for tourism environmental pollution the main way to do a summary and its particularity, summing up the basic law of tourism affect the environment, thus provide the basis for strengthening the environmental protection from the point of view of tourism management. The emergence and development of tourism culture is inseparable from the influence of the environment, and tourism culture also affects the environment. The negative effects and negative effects of tourism culture development on the environment are becoming more and more evident, which has aroused people’s general concern. In recent years, the negative impact of tourism and cultural activities on the environment has been paid much attention to by many scholars at home and abroad. This paper discusses the impact of tourism activities on nature reserves, and discusses the causes of this problem, so as to analyze the strategies to ensure the harmony and order of nature reserves in tourism activities.


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