Waste Water Management Coursework Example | Topics and Well Written Essays - 10000 words

Waste Water Management - Coursework Example It seems impossible that one universal method will be able to satisfy the situation, thus there are several methods and techniques that have been devised to detect and dispose off the organic pollutants. It is important to distinguish the effectiveness and robustness of a technology, while searching for the most efficient one amongst the various water treatment methods available in the market. The need is to overcome the environmental vulnerability, without sacrificing the performance levels of the water treatment techniques. There are several technologies that present effectual solutions for the versatile water treatment issues but at the same time possess considerable flaws. For example, one of the most popularly used water treatment methods is with the help of activated carbon or zeolite surfaces. In this method, the contaminants are separated from the water by transferring them to relatively highly charged surface area of the water sample. The drawback of this method is that the pollutant needs to be disposed after the adsorbent is exhausted and often mixes in the water again. Similarly other methods like, thermal oxidation treatment (extremely energy intensive), biological treatment (which has failed to provide results with high variation of pollutants), have not provided the research community with the desired results. This paper presents a review on the work done on photo catalytic oxidation reactions---a type of Advanced Oxidation Process (AOP's). It presents the option of water treatment by the photo catalytic oxidation process in a UV reactor system to mineralize organic contaminants in water with the help of a semiconductor catalyst TiO2. Thus the paper explores the recovery of water from waste water as an alternative water resource. It also throws light on the different water treatment technologies prevalent today and their comparison with the photo catalytic reactions. Using UV water treatment method for disinfection of waste water dates back to 1915 in the U.S. and since then the costs of the method have depreciated largely, thereby opening news roads and allowing the researchers to develop effective UV methods to disinfect water and wastewater. In these oxidation methods, water is treated with the help of

Discuss the proposition that welfare policies in relation to people Essay

Discuss the proposition that welfare policies in relation to people with disabilities tend to focus on what people with disabili - Essay Example The key characteristics of these policies are their strong dependency on the financial status of each particular country. From this perspective, developed countries are most likely to develop effective welfare policies for people with disabilities—compared to third-world and developing countries. However, problems and delays are identified in the development of these policies in practice. Most commonly, the welfare policies for people with disabilities focus on what these people cannot do, rather than on what they can do. Cross-Cultural Approach The level at which welfare policies address the needs of people with disabilities, refers to the obstacles that these people must overcome. It also aims to show the reason the policies referring to the needs, and the rights, of people with disabilities are based on these peoples’ inabilities and not on their potential and capabilities. Thus, the specific strategy, using this criterion for developing welfare policies for people w ith disabilities can be explained using multiple approaches. These strategies significantly vary from one country to another. However, similarities exist on which the relevant explanations can be based. Another notable discovery of this study is the expanding trend of focus on inabilities because specific interests are served, as explained analytically below. It should also be mentioned that the criteria used by legislators when developing policies related to the interests of people with disabilities is not standardized; the political characteristics of each country—as these characteristics are not constant over time—are of crucial importance for deciding on the terms under which disabled people will be supported (Combat Poverty Agency 1994, p. 114; Chaudhary 2006, p. 12). Moreover, often the reasons for which welfare policies are implemented are independent from political trends and social ethics within a given country. For instance, when these policies are applied ac ross a particular organization, the criteria on which these policies are based cannot be controlled using the common ethical rules. This issue is also explored, at the level that it helps to understand this trend. Historical Perspective The welfare policies developed within each society are usually related to local social needs and culture; however, infrastructure available for the relevant policies has also historically been considered to play a critical role in deciding the welfare policies that would be most appropriate for a specific country. On the other hand, an increase in the number of people with disabilities, not participatory in the workforce, leads to the assumption that more funds are required for their financial support (Cousins, 2007, p. 252). The identification of these funds can be a challenging task for a government—particularly in periods of financial crisis and in countries that face severe financial turbulences. For instance, as of October 2010, the World Bank reports disbursements totalling â€Å"a record $81 billion—