METHODS OF Wastewater TREATMENT

Resonance, 2000

In the first part of this article, we have learned about the need and importance of wastewater treatment and conventional methods of treatment. Currently the need is to develop low power consuming and yet effective techniques to handle complex wastes. As a result, new and advanced techniques are being studied and in the second part of the article, we give a brief description about each of such techniques, their principles of operation, merits and demerits.

Preliminary treatment consists solely in separating the floating materials (like dead animals, tree branches, papers, pieces of rags, wood, etc.), and also the heavy settle able inorganic solids. It also helps in removing the oils and greases, etc. from the sewage. This treatment reduces the BOD of the wastewater, by about 15 to 30%. The processes used are:

2021

The absence of water coming about because of monetary and populace development is viewed as perhaps the main dread for mankind and a danger for supportable turn of events. As a consequence of natural sources such as household and agricultural waste, as well as industrial activities, many water supplies are now polluted. The public's concern about the environmental consequences of wastewater pollution has grown. The problem of fresh water scarcity affects people all over the globe. The primary goal of the wastewater treatment process is to eliminate various polluting load constituents such as solids, organic carbon, nutrients, inorganic salts, metals, pathogens, and so on effective wastewater treatment and disposal are critical for both environmental and public health reasons, and wastewater management's primary aim is to protect the environment while also addressing public health and socioeconomic issues. The increased population, combined with numerous human activities, has...

Desalination, 2004

Wastewaters are waterborne solids and liquids discharged into sewers that represent the wastes of community life. Wastewater includes dissolved and suspended organic solids, which are "putrescible" or biologically decomposable. Two general categories ofwastewaters, not entirely separable, are recognized: domestic and industrial. Wastewater treatment is a process in which the solids in wastewater are partially removed and partially changed by decomposition from highly complex, putrescible, organic solids to mineral or relatively stable organic solids. Primary and secondary treatment removes the majority of BOD and suspended solids found in wastewaters. However, in an increasing number of cases this level of treatment has proved to be insufficient to protect the receiving waters or to provide reusable water for industrial and/or domestic recycling. Thus, additional treatment steps have been added to wastewater treatment plants to provide for further organic and solids removals or to provide for removal of nutrients and/or toxic materials. There have been several new developments in the water treatment field in the last years. Alternatives have presented themselves for classical and conventional water treatment systems. Advanced wastewater treatments have become an area of global focus as individuals, communities, industries and nations strive for ways to keep essential resources available and suitable for use. Advanced wastewater treatment technology, coupled with wastewater reduction and water recycling initiatives, offer hope of slowing, and perhaps halting, the inevitable loss of usable water. Membrane technologies are well suited to the recycling and reuse ofwastewater. Membranes can selectively separate components over a wide range of particle sizes and molecular weights. Membrane technology has become a dignified separation technology over the past decennia. The main force of membrane technology is the fact that it works without the addition of chemicals, with relatively low energy use and easy and well-arranged process conduction. This paper covers all advanced methods ofwastewater treatments and reuse.

International Journal of Scientific Research in Science and Technology, 2022

Waste water is water whose physical, chemical or biological properties have been changed as a result of the introduction of certain substances which render if unsafe for some purposes such as drinking. The day to day activities of man is mainly water dependent and therefore, discharge waste into water. This article highlights methods of waste water treatment system and management for toxic wastes.

Revista de Historiografía, 39, 2024

https://e-revistas.uc3m.es/index.php/REVHISTO/article/view/7530 En las últimas décadas se ha consolidado en España una disciplina que, en el marco de los estudios histórico-artísticos, ha recibido el nombre de Recepción de la Antigüedad clásica (Antikenrezeption). Su origen debe rastrearse en la escuela alemana y, en concreto, en el pensamiento de Aby Warburg (1866-1929) y de sus discípulos, quienes acuñaron y perfeccionaron la metodología propuesta por su maestro para el estudio de las pervivencias de la Antigüedad en las diferentes épocas históricas (das Nachleben der Antike). La llegada tardía de las propuestas warburgianas a España no ha impedido, sin embargo, el desarrollo de una línea de investigación que, surgida principalmente como evolución de la historiografía de la Historia Antigua y de la arqueología, ha entroncado en los últimos años con la teoría de la recepción alemana y con el enfoque metodológico de Warburg, resultando una discusión interdisciplinar que debe encuadrarse dentro de la investigación en historia cultural. Este trabajo estudia la influencia del pensamiento de Warburg y del Warburg-Kreis en el mundo académico español y su relación con el desarrollo y la consolidación de los estudios de Recepción de la Antigüedad clásica.

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