Changing needs for appropriate excreta disposal and small wastewater treatment methodologies or The future technology of small wastewater treatment systems

2004 ◽  
Vol 48 (11-12) ◽  
pp. 1-6 ◽  
Author(s):  
C.W. Randall
Keyword(s):  
Developing Countries ◽  
Wastewater Treatment ◽  
Rural Areas ◽  
Water Reuse ◽  
Surface Water Quality ◽  
Developed Countries ◽  
Small Scale ◽  
Wastewater Disposal ◽  
The Future ◽  
Wastewater Treatment Systems

Recent developments will strongly influence the design and utilization of small wastewater treatment systems in the future, e.g. population increases in non-sewered rural areas and developing countries; increasing impairment of surface water quality; the construction of occupied high-rise buildings in metropolitan areas; the development of planned but somewhat isolated communities, growing shortages of water that mandate reuse of wastewaters. It is well known that there is a very strong linkage between wastewater disposal methods in rural areas and developing countries and the general health of the population. These problems could be greatly reduced or prevented by the utilization of well known excreta disposal and small wastewater treatment system technologies, but the development of more innovative on-site systems is needed. It is expected that future environmental and public health pressures in developed countries will require increasingly stringent effluent limitations for small and on-site wastewater disposal systems, based primarily on nutrient discharges. Both on-site and small-scale technologies are available for the more stringent requirements, but innovative and more economical designs are needed for wide-spread acceptance. Water reuse should be a consideration for the designs of these systems. Implementation and utilization of well known technologies are needed, but the obstacles are often more social and political than economical.

Core aspects of international water supply and wastewater disposal with a focus on developing countries in the Asia and Africa region

2019 ◽  
Vol 19 (6) ◽  
pp. 1809-1815 ◽  
Author(s):  
M. Lawens ◽  
H. Eckhardt ◽  
S. Gramel
Keyword(s):  
Developing Countries ◽  
Water Supply ◽  
Water Reuse ◽  
Developed Countries ◽  
Climatic Conditions ◽  
Anaerobic Sludge ◽  
Water Losses ◽  
Wastewater Disposal ◽  
Untreated Wastewater ◽  
The Impact

Abstract Water crises are already stressing societies, economies, and the environment worldwide and especially developing countries. The expected growth in population, urbanization and economic activity, as well as the impact of climate change, will exacerbate the situation in the coming decade. In developed countries, conventional water supply and wastewater disposal systems ensure safe access to drinking water, sanitation and wastewater services. The worldwide application of conventional systems is, however, only possible to a limited extent. The reason for this is that these systems are designed for certain climatic conditions and also do not consider the varying requirements regarding water supply and wastewater disposal typical for developing countries. Although there are alternative water supply and wastewater disposal systems that have proved to be successful throughout the developing world, there are still several barriers to their worldwide adoption. To increase the establishment of these approaches this paper focuses on aspects of particular relevance for developing countries, namely: water reuse (untreated wastewater), alternative sewerage (settled and simplified sewerage), alternative wastewater treatment (waste stabilization ponds, constructed wetlands and up-flow anaerobic sludge blanket reactors) and management of water losses (real and apparent losses).

Technology for sustainability: the role of onsite, small and community scale technology

2005 ◽  
Vol 51 (10) ◽  
pp. 15-20 ◽  
Author(s):  
G. Ho
Keyword(s):  
Developing Countries ◽  
Wastewater Treatment ◽  
Rural Areas ◽  
Food Production ◽  
Lower Cost ◽  
Developed Countries ◽  
Research Development ◽  
Treatment Technology ◽  
Current Technology

An overview of available onsite, small and community scale wastewater treatment technology shows that it is diverse compared to current technology for centralised collection and treatment of wastewater. An analysis of the onsite, small and community scale technology for achieving sustainability shows that it more conducive to achieving sustainability than the centralised technology. It is likely, however, that its application is in remote and rural areas, where the technology should be improved and integrated with other technology sectors (energy, food production) for improved sustainability. Opportunities exist in new urban developments to achieve similar outcomes, but concerted efforts are required to demonstrate or showcase sustainability benefits in real situations. A huge potential also exists for the use of onsite, small and community scale technology in developing countries for achieving the same sustainability outcomes. It is likely to succeed if the technology is modified to be of lower cost but based on the same science, and that research, development and demonstrations in developed countries are shown to be successful.

scholarly journals Removal of Organic Compounds Using Improved Wetland Systems for Wastewater Reuse As an Example of Local Sustainable Water Management

2016 ◽  
Vol 5 (2) ◽  
pp. 319
Author(s):  
Wojciech Halicki ◽  
Katarzyna Kita
Keyword(s):  
Wastewater Treatment ◽  
Organic Compounds ◽  
Rural Areas ◽  
Water Reuse ◽  
Wastewater Reuse ◽  
Treated Wastewater ◽  
Treated Wastewater Reuse ◽  
Wetland System ◽  
Reuse Of Treated Wastewater ◽  
Wastewater Treatment Systems

<p class="emsd-body"><span lang="EN-GB">This paper discusses the efficiency of the removal of organic compounds using Improved Wetland System (IWS). IWS is used in Poland and enables reuse of treated effluent in landscape irrigation and toilet flushing. The first section of this paper discusses the advisability of removing organic compounds at the highest level. Additionally, the first section discusses the increase in frequency of treated wastewater reuse. So far, reuse of treated wastewater in local wastewater treatment systems included treatment and reuse of graywater only. The second section of this paper presents the average concentrations of organic compounds in domestic wastewater and the relationship existing between concentration of organic compounds in raw wastewater and water consumption. The second section discusses requirements for local (to 2000 population equivalent) wastewater treatment systems relating to reduction of organic compounds. The third section presents the current situation in rural areas in Poland and indicates the necessity of treated wastewater reuse mainly in these places. In Poland 43 % of the overall population occupies rural areas and about 70 % of them are not connected to a wastewater network. Implementation of water reuse technology (mainly IWS) is the easiest and the cheapest in rural areas. The fourth section presents the principle and the construction of the Improved Wetland System with water reuse. This part shows defects of Constructed Wetlands hindering reuse of treated wastewater. Additionally, this section discusses different steps and efficiency of wastewater treatment. The fifth section discusses results of removing organic compounds depending on hydraulic and contaminant loads. In addition, this section presents guidance on designing the IWS with technology that enables water reuse for flushing toilets and landscape irrigation. The last part of this paper discusses the summary and economic aspects of IWS used in Poland. In addition, the last part shows existing IWS </span><span lang="EN-GB">objects in Poland which provides water reuse to flushing toilets, landscape irrigation and for retention and recreational uses.</span></p>

Renovated Water Reuse from Rapid Infiltration System

1995 ◽  
Vol 30 (1) ◽  
pp. 111-114
Author(s):  
Duan ZhenBo ◽  
Wang Shang ShaoTang ◽  
Li RuQi ◽  
Wu XureQing ◽  
Gao Erjing
Keyword(s):  
Developing Countries ◽  
Wastewater Treatment ◽  
Water Reuse ◽  
The Cost

Abstract The use of renovated water from a rapid infiltration system for fish and duck farming was evaluated. It was concluded that the flesh of fish and duck was edible. The use of this approach is beneficial to the environment and economy, especially in developing countries. The production of fish and duck can offset the cost of wastewater treatment in many cases.

History and Current Situation of Night Soil Treatment Systems and Decentralized Wastewater Treatment Systems in Japan

2010 ◽  
Vol 5 (4) ◽  
Author(s):  
X.M. Yang ◽  
A. Morita ◽  
I. Nakano ◽  
Y. Kushida ◽  
H. Ogawa
Keyword(s):  
Wastewater Treatment ◽  
Rural Areas ◽  
Urban Areas ◽  
Domestic Wastewater ◽  
Soil Treatment ◽  
Decentralized System ◽  
Decentralized Wastewater Treatment ◽  
Rapid Economic Growth ◽  
Unique System ◽  
Wastewater Treatment Systems

In Japan, night soil, or black water, was formerly used as fertilizer for agriculture. However, during the rapid economic growth that took place after 1960, chemical fertilizers began to be adopted for agriculture and night soil was almost abandoned. How to treat the excess of night soil then became a big challenge to tackle. From that time a variety of night soil treatment technologies have been developed and the Japanese government has actively promoted the construction of night soil treatment facilities all over the country. As measures for domestic wastewater treatment, sewerage systems were spread in high-density urban areas, while a decentralized system called johkasou was diffused in rural areas with low population density. Johkasou is a unique system that was devised in Japan and mainly treats domestic wastewater on-site. Night soil treatment systems and decentralized wastewater treatment systems used in Japan are introduced in this paper, in the hope that the experience acquired in Japan will contribute to improve the sanitation conditions in other countries.

scholarly journals Analysis of Challenges Facing Rice Processing in Nigeria

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
A. S. Ajala ◽  
A. Gana
Keyword(s):  
Decision Making ◽  
Growth Rate ◽  
Developing Countries ◽  
Population Growth Rate ◽  
Developed Countries ◽  
Small Scale ◽  
Basic Information ◽  
Food Crop ◽  
Important Food ◽  
Rice Processing

Rice is the most economically important food crop in many developing countries and has also become a major crop in many developed countries where its consumption has increased considerably. It has become necessary to meet the demand of the world’s current population growth rate, and the least costly means for achieving this aim is to increase rice productivity, wherever possible. The main challenges encountered by rice processors in Nigeria are to find appropriate solutions for quality rice processing. Therefore this work provides basic information about the challenges of rice processing and focuses on the challenges faced by the small scale rice processors and reasons for continuous rice importation with a view to guiding decision-making to be self-sufficient in rice production, thereby making some improvement in Nigerian economy.

scholarly journals The Application of Principles of Green Building in Traditional Housing in Iraq

2015 ◽  
Vol 747 ◽  
pp. 7-11
Author(s):  
Maryam Qays Oleiwi ◽  
Ayat Ali ◽  
Nangkula Utaberta ◽  
Mastor Surat
Keyword(s):  
Developing Countries ◽  
Global Warming ◽  
Natural Resources ◽  
Green Building ◽  
Developed Countries ◽  
Green Buildings ◽  
Climatic Changes ◽  
Global Issue ◽  
The Future ◽  
Definition Of

Green building has become an important issue among architects and urban planners due to the increment in global warming risks and climatic changes which influenced negatively on natural resources. It is also one of measures been put forward to alleviate the significant impacts of the influence of buildings on the environment, society and economy. There have been extensive studies on green buildings, as evidenced in the rapid growing number of papers been published in last decades. These studies have been conducted in both developed countries and developing countries, indicating this is a global issue. However, there is lack of extensive researches on the green buildings in Iraq that is crucial for the future exerts. This paper reports the definition of green building, the environmental, social and economical aspects of green building, and application of green building's principles in traditional housing in Iraq.

scholarly journals Prospects of Multifunctionality in Nepalese Agriculture: The Agritourism Perspectives

2019 ◽  
Vol 2 (1) ◽  
pp. 108-118
Author(s):  
Kumar Bhatta
Keyword(s):  
Developing Countries ◽  
Rural Development ◽  
Rural Areas ◽  
Agricultural Sector ◽  
Central Government ◽  
Developed Countries ◽  
Educational Background ◽  
Capital City ◽  
Sustainable Rural Development ◽  
Household Heads

Multi functionality of agriculture in the developed countries is employed as a means of rural revitalization and economic circulation. Although farm diversification in the developing countries is much more crucial, in most of the rural areas of the developing countries, it is not performed, and it is delayed. In this regard, the main objective of this study is to explore the possibilities of the multi functionality of agriculture for the sustainable rural development for the implementation of the sustainable development goals (SDGs) in the developing countries. The empirical study was conducted in two of the rural districts of Nepal called Nuwakot and Rasuwa. The author intentionally chose these districts because it is one separate area north of the capital city Kathmandu and bordering to China. Further, even though the location is nearby the capital city, and the rural villages have excessive potentials for tourism activities, the farmers are still focusing on subsistence farming without getting benefits from tourism. Based on the macro data of Nepal government and field visit, the author conducted a case study. This study explored that most of the household heads are working in the agricultural sector, which can be one of the opportunities to launch multi functionality of agriculture. However, due to their weak educational background, they are expecting external supports in terms of knowledge, technology, and more importantly, supportive policy. The federal and central government should give subsidy to the farmers so that they canstart multi functionality in their farms, which lead to sustainable rural development.

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