Leading Edge Technologies 2017 series: Chongrak Polprasert & Thammarat Koottatep

To celebrate the Leading Edge Conference on Water and Wastewater Technologies (LET 2017), we spoke to key authors and editors about the event and exciting technological developments in the field.

Leading Edge Technologies 2017 series: Ivan Kozyatnyk

To celebrate the Leading Edge Conference on Water and Wastewater Technologies (LET 2017), we spoke to key authors and editors about the event and exciting technological developments in the field.

Leading Edge Technologies 2017 series: Wolfgang Rauch

To celebrate the Leading Edge Conference on Water and Wastewater Technologies (LET 2017), we spoke to key authors and editors about the event and exciting technological developments in the field.

What needs to change to achieve access to sanitation for all by 2030? What needs to change to achieve access to sanitation for all by 2030?

Andrés Hueso, Senior Policy Analyst for Sanitation at WaterAid, discusses the opportunities and challenges involved in global prioritisation of sanitation and water for all.

Would the poor slum dweller contribute financially for water supply and why?

Following the publication of research from 23 slums of Kolkata, India, author Indranil De considers the willingness of different ethnic groups to pay for better water supply and the factors that affect this.

A new approach for studying the operation of a secondary sedimentation tank (SST)

Lucio Pezza, expert on the management, control and maintenance of water and wastewater treatment plants, covers some key concerns of his new article on the operation of secondary sedimentation  tanks (SSTs).

Coagulation and Flocculation in Water and Wastewater Treatment

Coagulation and flocculation are an essential part of drinking water treatment as well as wastewater treatment. This article provides an overview of the processes and looks at the latest thinking.

Reverse Osmosis and Removal of Minerals from Drinking Water

Reverse Osmosis will generally remove salt, manganese, iron, flouride, lead, and calcium (Binnie et. al., 2002).  Most mineral constituents of water are physically larger than water molecules and they are trapped by the semi-permeable membrane and removed from drinking water when filtered through a RO (AllAboutWater.org, 2004).  Meanwhile, consumers are concerned about the removal of minerals from their drinking water.

Water-based diseases

Waterborne diseases are caused by pathogenic microorganisms which are directly transmitted when contaminated fresh water is consumed. Contaminated fresh water, used in the preparation of food, can be the source of foodborne disease through consumption of the same microorganisms. According to the World Health Organization, diarrheal disease accounts for an estimated 4.1% of the total DALY (diability-adjusted life year)  global burden of disease and is responsible for the deaths of 1.8 million people every year. It was estimated that 88% of that burden is attributable to unsafe water supply, sanitation and hygiene, and is mostly concentrated in children in developing countries.

Sedimentation Processes

Sedimentation is one of several methods for application prior to filtration: other options include dissolved air flotation and some methods of filtration. Generically, such solids-liquid separation processes are sometimes referred to as clarification processes. There is a variety of methods for applying sedimentation and include: horizontal flow, radial flow, inclined plate, ballasted floc and floc blanket sedimentation.

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