Tag Archives: wastewater

New study analyzes options for wastewater treatment in Lower Egypt

New study analyzes options for wastewater treatment in Lower Egypt

Source: Daily News Egypt – February 24, 2012

CAIRO: Egypt has made good progress towards increasing access to sanitation in urban areas but access to waste water treatment in rural areas lags far behind, a recent study showed.

The World Bank and the University of Leeds launched a new study in Cairo that analyzed the cost-effectiveness of a range of investment options for wastewater treatment in terms of the relative health benefits these are likely to generate for downstream farmers and consumers.

The study [1], conducted by the University of Leeds, UK, in partnership with the World Bank and the Holding Company for Water and Waste Water, discussed the benefits of differing strategies for Wastewater Management in Lower Egypt using Quantitative Microbial Risk Analysis (QMRA).

“The study, which we are presenting today, discusses the selection of efficient and effective treatment technologies and would be a useful input to policy makers in the sanitation and health sectors in Egypt,” said David Craig, the World Bank Country Director for Egypt, Yemen and Djibouti.

Rates of sewerage connection in rural Egypt remained at only 18 percent in 2008. There is substantial evidence that informal discharges of untreated domestic wastewater in agricultural channels is widespread – and it is not surprising given the lack of facilities for collection and safe disposal of wastewater from household vaults.

The high rate of informal reuse of agricultural drainage water means that these wastewater discharges have a significant negative health impact. Domestic waste has significant potential as an input to agriculture and can be safely used as fertilizer if appropriately treated and regulated.

Many technologies exist, and indeed, simple improvements to existing domestic sanitary facilities could have significant benefits at a relatively low cost. The challenge is to work out what investment strategies make the most sense in terms of delivering a good service to citizens, protecting health and promoting agricultural efficiencies at the most efficient price.

The World Bank has been supporting Egypt’s reforms in the water supply and sanitation sector and continues to support improved access to sustainable rural sanitation services in Egypt, given its strong linkages to health and environment.

[1] Evans, B. and Iyer, P., 2012. Estimating relative benefits of differing strategies for management of wastewater in Lower Egypt using quantitative microbial risk analysis (QMRA). Washington, DC, World Bank Water Partnership Program, World Bank. viii, 36 p. Download report

Global study shows widespread sewage use on farms

STOCKHOLM, Sweden: People in developing countries are facing growing health risks caused by the widespread use of raw sewage to irrigate crops, according to a study unveiled Monday at a global water conference in Sweden.

The report, by the International Water Management Institute, says more than half of farmland near 70 percent of cities in Third World countries is watered with sewage that threatens to spread epidemics.

“Irrigating with wastewater isn’t a rare practice limited to a few of the poorest countries,” said Liqa Raschid-Sally, a researcher at the institute. “It’s a widespread phenomenon, occurring on 20 million hectares (50 million acres) across the developing world, especially in Asian countries, like China, India and Vietnam, but also around nearly every city of sub-Saharan Africa and in many Latin American cities.”

She was speaking Sunday at the start of World Water Week, a conference attended by 2,500 scientists, politicians and officials from 140 countries. The United Nations has named 2008 the International Year of Sanitation.

Experts said that 1.4 million children die every year from diarrhea-related diseases and poor hygiene, and described the global sanitation crisis as “the world’s largest environmental problem.”
An increasing demand for water and food has spurred the use of sewage to water crops but in many cases is the only form of irrigation for farmers who lack clean water, the study showed. It is mostly used to produce vegetables and cereals, and poses a major health risk to consumers of uncooked vegetables.

However, the report said sewage also provides a livelihood for many by making possible the cultivation of land, and it recommends an increase in purifying water supplies rather than a total ban on the use of wastewater.

More – International Herald Tribune

World Bank – Sanitation, Hygiene and Wastewater Resource Guide

Service provision in sanitation and hygiene involves four main components that must be understood and addressed when designing or implementing a new sanitation project:
institutions required to implement and sustain improved sanitation and hygiene at scale.
infrastructure itself (the physical hardware of latrines and sewers);
promotion of behavior change, both for hygiene, and for household investment in infrastructure; and
finance required to pay for the infrastructure and promotion

This Sanitation, Hygiene and Wastewater Resource Guide describes sanitation problems and solutions through the above framework, and guides the reader to available resources on these topics.

Ghana – Experts look at new technology for treating wastewater

Imroving sanitation and wastewater treatment in Ghana’s cities and towns is the focus of a week-long event being led by a De Montfort University Leicester (DMU) researcher.

Parneet Paul, of the University’s Water Software Systems Research Group, has organised the workshop, which will be held in the West African country’s capital, Accra and will be attended by local scientists, researchers and engineers.

Wastewater is water which has been contaminated while being used for a specific purpose. Contaminants typically include sewage, biological materials or industrial by-products.

The workshop will focus on the use of new sanitation methods to treat, reduce and reuse wastewater generated on-site by large facilities, such as hospitals, public slaughterhouses, city markets and local businesses.

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