Notes on the Design and Operation of Waste Stabilization Ponds in Warm Climates of Developing Countries PDF Download

Author: J. P. Arthur
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 130

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Book Description
The paper acknowledges that water carriage sewerage systems are not always the most appropriate sanitation solution for the disposal of liquid domestic wastes in developing countries. However, where water carriage systems are proposed, the first treatment option which should always be considered is the use of stabilization ponds, because in many instances, they represent the most cost effective and efficient way of treating domestic sewage flows. The paper results from a review of pond systems installed in six countries and concludes that: (i) designs differ widely; (ii) maximum use is not made of anaerobic ponds or the reuse potential of effluents; (iii) pond systems are frequently grossly overdesigned; and (iv) the designs are not responsive to the incremental growth encountered in LDCs. Practical design criteria are given for pond systems over a range of ambient temperature conditions and end use requirements together with notes on start up procedures, operation and trouble shooting. The recommendations are derived in part from the Israeli experience where considerable use is made of treated sewage effluent for irrigation purposes.

Author: Zaini Ujang
Publisher: IWA Publishing
ISBN: 1843390302
Category : Science
Languages : en
Pages : 364

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Book Description
Municipal Wastewater Management in Developing Countries discusses various approaches to municipal wastewater management in order to protect both public health and the environment, with the major focus being on waterborne diseases. Developing countries can be divided into two main categories, i.e. countries in transition with higher growth rates where industrialisation and urbanisation are taking place rapidly, and countries with slower growth rates. It is important, therefore, that approaches should be tailor-made and site-specific. In general, the major trends of water pollution control have significantly contributed to the development of ?conventional sanitation? approaches in terms of legal and financial frameworks, as well as technological enhancement. Despite advances in the science, engineering and legal frameworks, 95 per cent of the wastewater in the world is released into the environment without treatment. Only five per cent of global wastewater is properly treated using the ?standard? sanitation facilities, mainly in developed countries. As a result, the majority of the world?s population is still exposed to waterborne diseases, and the quality of water resources has been rapidly degraded, particularly in poor developing countries. The challenge now is to provide the world?s population, especially the poor, with adequate water and sanitation facilities. Despite billions of dollars of investment spent every year, billions of poor people are still suffering and dying because of poor sanitation. At the beginning of this century, about 1.1 billion people lived without access to clean water (compared to about the same number in 1990), 2.4 billion without appropriate sanitation (compared to 2.3 billion in 1990) and four billion without sound wastewater disposal. The future scenario, that water resources will be further depleted by a growing world population, will be coupled with environmental degradation due to poor pollution control, particularly in most of the developing countries. In order to address the issue of water and wastewater management in developing countries it is necessary to take into consideration the segments of the society itself, particularly the types of housing areas. The segments will indicate the level of socio-economic, mentality and knowledge, which is important for any planned changes in their life style and social engineering. It is also important to segregate the funding framework of any proposed projects. High-income urban communities, for instance, are generally willing to pay for sewerage services and higher water supply tariffs, therefore a designated system can be accordingly provided. Over the past 10 years, serious criticism has been given to the ?conventional sanitation? approach, consequently many definitions, concepts and characteristics have been proposed on ?sustainable sanitation?. Sustainable sanitation is a relevant concept in order to achieve the Millennium Development Goals by 2015 of providing water supply and adequate sanitation for developing countries. Sustainable sanitation is flexible in approach any community ? poor or rich, urban or rural, water-rich or water-poor country ? and requires lower investment costs compared to conventional sanitation approaches. It is also important to note that the framework of sustainable sanitation is much easier to adopt in developing countries where water supply and sanitation infrastructures are still in the developing stages. In some developing countries, no public facilities are available therefore it is an ideal condition to start a new infrastructure with a new framework. This comprehensive reference, prepared by leading international authorities, will provide an invaluable reference for all those concerned with the management of sanitation services in developing countries worldwide.

Author: Duncan Mara
Publisher: Routledge
ISBN: 1136567917
Category : Nature
Languages : en
Pages : 312

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Book Description
Affordable and effective domestic wastewater treatment is a critical issue in public health and disease prevention around the world, particularly so in developing countries which often lack the financial and technical resources necessary for proper treatment facilities. This practical guide provides state-of-the-art coverage of methods for domestic wastewater treatment and provides a foundation to the practical design of wastewater treatment and re-use systems. The emphasis is on low-cost, low-energy, low-maintenance, high-performance 'natural' systems that contribute to environmental sustainability by producing effluents that can be safely and profitably used in agriculture for crop irrigation and/or in aquaculture, for fish and aquatic vegetable pond fertilization. Modern design methodologies, with worked design examples, are described for waste stabilization ponds, wastewater storage and treatment reservoirs; constructed wetlands, upflow anaerobic sludge blanket reactors, biofilters, aerated lagoons and oxidation ditches. This book is essential reading for engineers, academics and upper-level and graduate students in engineering, wastewater management and public health, and others interested in sustainable and cost-effective technologies for reducing wastewater-related diseases and environmental damage.

Author: Sven Erik Jorgensen
Publisher: CRC Press
ISBN: 1000082547
Category : Technology & Engineering
Languages : en
Pages : 3829

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Book Description
Bringing together a wealth of knowledge, the Handbook of Environmental Management, Second Edition, gives a comprehensive overview of environmental problems, their sources, their assessment, and their solutions. Through in-depth entries, and a topical table of contents, readers will quickly find answers to questions about pollution and management issues. This six-volume set is a reimagining of the award-winning Encyclopedia of Environmental Management, published in 2013, and features insights from more than 500 contributors, all experts in their fields. The experience, evidence, methods, and models used in studying environmental management is presented here in six stand-alone volumes, arranged along the major environmental systems. Features of the new edition: The first handbook that demonstrates the key processes and provisions for enhancing environmental management. Addresses new and cutting -edge topics on ecosystem services, resilience, sustainability, food-energy-water nexus, socio-ecological systems and more. Provides an excellent basic knowledge on environmental systems, explains how these systems function and offers strategies on how to best manage them. Includes the most important problems and solutions facing environmental management today.

Author: Sandy Cairncross
Publisher: Routledge
ISBN: 1134665865
Category : Medical
Languages : en
Pages : 359

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Book Description
This fully updated third edition of the classic text, widely cited as the most important and useful book for health engineering and disease prevention, describes infectious diseases in tropical and developing countries, and the effective measures that may be used against them. The infections described include the diarrhoeal diseases, the common gut worms, Guinea worm, schistosomiasis, malaria, Bancroftian filariasis and other mosquito-borne infections. The environmental interventions that receive most attention are domestic water supplies and improved excreta disposal. Appropriate technology for these interventions, and also their impact on infectious diseases, are documented in detail. This third edition includes new sections on arsenic in groundwater supplies and arsenic removal technologies, and new material in most chapters, including water supplies in developing countries and surface water drainage.

Author: Marcos Von Sperling
Publisher: IWA Publishing
ISBN: 1843391635
Category : Science
Languages : en
Pages : 177

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Book Description
Waste Stabilisation Ponds is the third volume in the series Biological Wastewater Treatment. The major variants of pond systems are fully covered, namely: facultative ponds anaerobic ponds aerated lagoons maturation ponds The book presents in a clear and informative way the main concepts, working principles, expected removal efficiencies, design criteria, design examples, construction aspects, operational guidelines and sludge managment for pond systems. About the series: The series is based on a highly acclaimed set of best selling textbooks. This international version is comprised by six textbooks giving a state-of-the-art presentation of the science and technology of biological wastewater treatment. Other titles in the series are: Volume 1: Waste Stabilisation Ponds Volume; 2: Basic Principles of Wastewater Treatment; Volume 4: Anaerobic Reactors; Volume 5: Activated Sludge and Aerobic Biofilm Reactors; Volume 6: Sludge Treatment and Disposal

Author: Jens Lonholdt
Publisher: IWA Publishing
ISBN: 1843390132
Category : Science
Languages : en
Pages : 393

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Book Description
Water and Wastewater Management in the Tropics provides the necessary conceptual framework and tools to assess all appropriate aspects of water and sanitation projects in developing countries. Using the lessons learned from courses taught at the Technical University of Denmark, Water and Wastewater Management in the Tropics is the concerted effort of a broad team including "hard core" engineers and practitioners as well as "soft core" environmental and institutional planners and economists, with contributions from renowned researchers as well as seasoned project managers. The first part of the book aims to give a basic understanding of international projects and addresses how to identify, formulate, select, organise, cost, finance, implement and manage water and wastewater management projects in developing countries. Later chapters focus on three different types of water and wastewater management projects in a tropical context: rural water and sanitation; urban water and wastewater management; and, industrial water and wastewater management. Water and Wastewater Management in the Tropics will appeal to graduate environmental engineering students but also to practitioners, economists, sociologists, and institutional planners working with water and sanitation projects in developing countries.

Author: Fadhi Al Nozaily
Publisher: CRC Press
ISBN: 9789054104254
Category : Technology & Engineering
Languages : en
Pages : 268

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Book Description
Duckweed (L.gibba)-covered sewage lagoons (DSLs) are low cost treatment systems, especially suitable for warm climates, or in lands where there are warm seasons. This study attempts to assess DSL system as a new technology, contributing to the understanding of the different mechanisms in the system. Duckweed-covered sewage lagoons could either replace complete wastewater stabilization ponds (WSPs) or be introduced as a second stage in an integrated WSP-DSL treatment system, which could then be used for purifying municipal wastewater, achieving suitable effluent for reuse in agriculture. The duckweed harvested from DSL systems has, in itself, an intrinsic economic value.

Author: Shimson Belkin
Publisher: Springer Science & Business Media
ISBN: 9401143692
Category : Science
Languages : en
Pages : 614

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Book Description
In the summer of 1999, an international group of experts convened in Jerusalem, Israel, in order to define the major environmental challenges facing humanity at the dawn of the new millennium and - where possible - propose ways of addressing them. Almost 50 selected articles are collected in the present book, which constitutes a striking interdisciplinary combination of state-of-the-art science with the latest views on environmental law, education, and international cooperation. Whilst a major fraction of the book is devoted to water-related issues (water quality monitoring, water and wastewater treatment, water-based international cooperation, and more), other sections deal with timely topics relating to air pollution, biodiversity, conservation, and education. The book is intended for environmental scientists, professionals, and students of all disciplines.

Author: Ismail Al Baz
Publisher: Springer Science & Business Media
ISBN: 3540744924
Category : Technology & Engineering
Languages : en
Pages : 302

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Book Description
Water reuse management is one of the challenges all water scarce countries have to deal with in the coming decades. The present book highlights non-conventional solutions within the field of wastewater treatment and reuse predominantly for professionals and decision makers. It focuses on technologies which are reliable, sustainable, low cost and suitable for rural and sub urban areas. In addition, particularly innovative on-site concepts are presented.