Ecological Sanitation - Revision history

Avinash Kumar at 07:39, 25 May 2016

2016-05-25T07:39:42Z

Christoph Wagener at 13:56, 11 March 2014

2014-03-11T13:56:01Z

Samantha Antonini at 21:37, 30 December 2013

2013-12-30T21:37:02Z

Samantha Antonini: /* Examples */

2013-12-30T21:27:50Z

‎Examples

Samantha Antonini at 21:21, 30 December 2013

2013-12-30T21:21:55Z

Samantha Antonini: Created page with " Ecological Sanitation (also: EcoSan, Sustainable Sanitation, Alternative Sanitation) is a sanitation app..."

2013-12-30T20:26:59Z

Created page with " Ecological Sanitation (also: EcoSan, Sustainable Sanitation, Alternative Sanitation) is a sanitation app..."

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Ecological Sanitation (also: EcoSan, Sustainable Sanitation, Alternative Sanitation) is a sanitation approach which aims at collecting the different waste streams separately at source and treating them individually with the objective of recovering valuable nutrients and reusing the clarified water.

Ecological sanitation technologies are based on the following three fundamental aspects<ref>Sida/Esrey S. et al. (1998): Ecological Sanitation. http://www.ecosanres.org/pdf_files/Ecological_Sanitation.pdf (Access 2013-12-30)</ref>:
*pollution prevention rather than pollution control
*sanitize human excreta
*use the safe products of sanitized human excreta for agricultural purposes

 

= '''Introduction''' =

The reuse of wastewater in agriculture is increasing both in developing and industrialized countries. The main drivers are<ref>WHO (2006): Guidelines for the safe use of wastewater, excreta and greywater. Volume 2 - Wastewater use in agriculture. http://whqlibdoc.who.int/publications/2006/9241546832_eng.pdf (Access 2013-12-30)</ref>:
*increasing water scarcity and degradation of water quality resulting from improper wastewater disposal
*population growth and related increased food demand
*acceptance of wastewater (and the containing nutrients) as a resource
*the Millenium Development Goals (MDGs), and more specially the MDGs focusing on environamental sustainability and the elimination of poverty and hunger.

In developing countries, over 780 million people still lack access to improved sources of drinking water and 2.5 billion people have no access to improved sanitation<ref>UNICEF, WHO (2012): Progress on drinking water and sanitation: 2012 update. http://whqlibdoc.who.int/publications/2012/9789280646320_eng_full_text.pdf (Access 2013-12-30)</ref>. They urgently need access to affordable infrastructures and sustainable sanitation solutions.

In the Western World, the sanitation industry – challenged by its aging infrastructure and new pressures such as climate change or increasing regulatory requirements – is at a turning point and needs reengineering<ref>Mitchell et al. (2011): Effectively managing the transition towards restorative futures in the sewage industry: A phosphorus case study. In: Water Sensitive Cities, p.83-96. http://water-alliance.org/storage/content/Restorative%20Futures%20-%20Mitchell.pdf (Access 2013-12-30)</ref>. In fact, conventional centralized wastewater treatment systems eliminate nutrients and can therefore be characterized as “end-of-pipe” solutions.

= '''No Mix technology''' =

No Mix toilets are used to separate urine from feces directly at source. The benefits of using such separation toilets are manifold:
*they save up to 80% of the water used for toilet flushing (this represents 30% of the average daily water use of a Western European)<ref>Larsen et al. (2001): Re-engineering the toilet for sustainable wastewater management. Environ Sci Technol 35:192A-7A</ref>
*urine is collected as a concentrated nutrient solution free of pathogens. In fact, urine contributes to less than 1% of the composition of municipal wastewater whilst adding more than 50% of the phosphorus and more than 75% of the nitrogen load<ref>Larsen and Gujer (1996): Separate management of anthropogenic nutrient solutions (human urine). Water Sci Technol 34:87-94.</ref>.

A difference is made between dry and wet types of toilets. The wet type mixes feces with water for transport. Urine is flushed with or without water. The dry type on the other hand is operated without the use of flushing water. Urine and feces are diverted to separate storage tanks. Examples of more simple separation toilets are squatting pans or seat risers with urine diversion.

= '''Yellow Water (urine)''' =

The major proportion of the nutrients is excreted with human urine. It contains most of the macronutrients and smaller amounts of the micronutrients in plant available forms. Urine is a nitrogen-rich liquid fertilizer with N concentrations of 3 to 7 grams per liter of urine. An adult produces between 0.8 and 1.5 liters of urine per day.

The use of human urine in plant production represents low health risks if there is no of little feacal cross-contamination. Pharmaceutical residues and hormones are excreted with urine. However, the risk of negative impacts on plants or human beings is thought to be negligible. The risk of using human urine as a fertilizer is far lower than the risk associated with using sewage sludge or farmyard manure for example. Storage is a simple, efficient and cheap method for treating collected urine. More complex treatment methods include technologies such as reverse osmosis, ion exchange, freeze/thaw, stripping/adsorption, nitrification, nanofiltration, ozonation or struvite precipitation.

During storage, urine sludge is generated as a result of the degradation of urea to ammonium. The sludge is composed of phosphate, magnesium, calcium and ammonium precipitates. It can be mixed with the supernatant and used with the rest of the urine.

Field trials have shown that yields of urine-fertilized crops did not differ from mineral fertilized crops.

= '''Brown Water (feces)''' =

Although feces contain lower nutrients than urine, the concentration of phosphorus and potassium is high. Feces also contain organic matter, which improves the water-holding and buffering capacity as well as the structure of soils.

Contrary to urine, feces contains large amounts of pathogens. Therefore, safe handling and treatment of feces are crucial in order to minimize disease transmission. The risk of odors, flies and number of potential pathogens in the feces can be reduced by adding ash after each defecation in a dry system. This is referred to as primary treatment. Secondary treatment takes place when the collection period is completed. The various options include composting, digestion, storage, chemical treatment and incineration.

= '''Greywater''' =

Greywater is essentially all wastewater except toilet wastes (toilet wastewater is called “blackwater”). It is sometimes referred to as washwater as it contains water from sinks, showers, tubs and washing machines. Greywater can directly be used as irrigation water by introducing it into the topsoil. Untreated greywater should not come in contact with edible parts of crops.

= '''Examples''' =

 

 

= '''Further reading''' =

 

 

= '''References''' =

<references />

@@ Line 3: / Line 3: @@
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Ecological sanitation technologies are based on the following three fundamental aspects<ref>Sida/Esrey S. et al. (1998): Ecological Sanitation. http://www.ecosanres.org/pdf_files/Ecological_Sanitation.pdf (Access 2013-12-30)</ref><span style="background: #00ff00"></span>:</font></font>
 *<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">pollution prevention rather than pollution control</font></font>
 *<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">sanitize human excreta</font></font>
@@ Line 12: / Line 13: @@
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">The reuse of wastewater in agriculture is increasing both in developing and industrialized countries. The main drivers are<ref>WHO (2006): Guidelines for the safe use of wastewater, excreta and greywater. Volume 2 - Wastewater use in agriculture. http://whqlibdoc.who.int/publications/2006/9241546832_eng.pdf (Access 2013-12-30)</ref>:</font></font>
-*<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">increasing [[Water_scarcity|water scarcity]] and degradation of water [[Quality|quality]] resulting from improper wastewater disposal</font></font>
-*<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">population growth and related increased [[Food_security|food demand]]</font></font>
+*<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">increasing [[Water scarcity|water scarcity]] and degradation of water [[Quality|quality]] resulting from improper wastewater disposal</font></font>
 *<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">acceptance of wastewater (and the containing nutrients) as a resource</font></font>
 *<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">the Millenium Development Goals (MDGs), and more specially the MDGs focusing on environamental sustainability and the elimination of poverty and hunger.</font></font>
@@ Line 24: / Line 26: @@
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">No Mix toilets are used to separate urine from feces directly at source. The benefits of using such separation toilets are manifold:</font></font>
 *<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">they save up to 80% of the water used for toilet flushing (this represents 30% of the average daily water use of a Western European)<ref>Larsen et al. (2001): Re-engineering the toilet for sustainable wastewater management. Environ Sci Technol 35:192A-7A</ref></font></font>
 *<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">urine is collected as a concentrated nutrient solution free of pathogens. In fact, urine contributes to less than 1% of the composition of municipal wastewater whilst adding more than 50% of the phosphorus and more than 75% of the nitrogen load<ref>Larsen and Gujer (1996): Separate management of anthropogenic nutrient solutions (human urine). Water Sci Technol 34:87-94.</ref>.</font></font>
@@ Line 79: / Line 82: @@
 [[Category:Resource_Management]]

@@ Line 1: / Line 1: @@
-<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Ecological Sanitation (also: EcoSan, Sustainable Sanitation, Alternative Sanitation) is a sanitation approach which aims at collecting the different waste streams separately at source and treating them individually with the objective of recovering valuable nutrients and reusing the clarified water.</font></font>
+<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Ecological Sanitation (also: EcoSan, Sustainable Sanitation, Alternative Sanitation) is a sanitation approach which aims at collecting the different waste streams separately at source and treating them individually with the objective of recovering valuable nutrients and [[Reuse|reusing]] the clarified water.</font></font>
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Ecological sanitation technologies are based on the following three fundamental aspects<ref>Sida/Esrey S. et al. (1998): Ecological Sanitation. http://www.ecosanres.org/pdf_files/Ecological_Sanitation.pdf (Access 2013-12-30)</ref><span style="background: #00ff00"></span>:</font></font>
@@ Line 12: / Line 12: @@
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">The reuse of wastewater in agriculture is increasing both in developing and industrialized countries. The main drivers are<ref>WHO (2006): Guidelines for the safe use of wastewater, excreta and greywater. Volume 2 - Wastewater use in agriculture. http://whqlibdoc.who.int/publications/2006/9241546832_eng.pdf (Access 2013-12-30)</ref>:</font></font>
-*<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">increasing water scarcity and degradation of water quality resulting from improper wastewater disposal</font></font>
+*<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">increasing [[Water_scarcity|water scarcity]] and degradation of water [[Quality|quality]] resulting from improper wastewater disposal</font></font>
-*<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">population growth and related increased food demand</font></font>
+*<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">population growth and related increased [[Food_security|food demand]]</font></font>
 *<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">acceptance of wastewater (and the containing nutrients) as a resource</font></font>
 *<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">the Millenium Development Goals (MDGs), and more specially the MDGs focusing on environamental sustainability and the elimination of poverty and hunger.</font></font>

@@ Line 47: / Line 47: @@
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Greywater is essentially all wastewater except toilet wastes (toilet wastewater is called “blackwater”). It is sometimes referred to as washwater as it contains water from sinks, showers, tubs and washing machines. Greywater can directly be used as irrigation water by introducing it into the topsoil. Untreated greywater should not come in contact with edible parts of crops.</font></font>
 = <font face="Arial, sans-serif"><font size="3">'''Examples'''</font></font> =
@@ Line 55: / Line 56: @@
 *SOIL, Haiti ([http://www.oursoil.org/ http://www.oursoil.org/])
 = <font face="Arial, sans-serif"><font size="3">'''References'''</font></font> =
@@ Line 75: / Line 77: @@
 Water Aid technical handbook - Construction of ecological sanitation latrine: [http://www.wateraid.org/~/media/Publications/construction-ecological-sanitation-latrine-technical-handbook.pdf http://www.wateraid.org/~/media/Publications/construction-ecological-sanitation-latrine-technical-handbook.pdf]<br/>

@@ Line 46: / Line 46: @@
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Greywater is essentially all wastewater except toilet wastes (toilet wastewater is called “blackwater”). It is sometimes referred to as washwater as it contains water from sinks, showers, tubs and washing machines. Greywater can directly be used as irrigation water by introducing it into the topsoil. Untreated greywater should not come in contact with edible parts of crops.</font></font>
 = <font face="Arial, sans-serif"><font size="3">'''Examples'''</font></font> =
-*Novaquatis, eawag, Switzerland (http://www.novaquatis.eawag.ch/index_EN)
+*Novaquatis, eawag project that focused on urine source separation, Switzerland ([http://www.novaquatis.eawag.ch/index_EN http://www.novaquatis.eawag.ch/index_EN])
-*VUNA, Nutrient harvesting in South Africa (http://www.eawag.ch/forschung/eng/gruppen/vuna/index_EN)
+*VUNA, Nutrient harvesting in South Africa ([http://www.eawag.ch/forschung/eng/gruppen/vuna/index_EN http://www.eawag.ch/forschung/eng/gruppen/vuna/index_EN])
-*STUN, Nutrient valorization from urine in Nepal (http://www.eawag.ch/forschung/sandec/gruppen/EWM/projects_ewm/stun/index_EN)
+*STUN, Nutrient valorization from urine in Nepal ([http://www.eawag.ch/forschung/sandec/gruppen/EWM/projects_ewm/stun/index_EN http://www.eawag.ch/forschung/sandec/gruppen/EWM/projects_ewm/stun/index_EN])
-*SOIL, Haiti (http://www.oursoil.org/)
+*SOIL, Haiti ([http://www.oursoil.org/ http://www.oursoil.org/])
 = <font face="Arial, sans-serif"><font size="3">'''References'''</font></font> =

@@ Line 33: / Line 33: @@
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">The major proportion of the nutrients is excreted with human urine. It contains most of the macronutrients and smaller amounts of the micronutrients in plant available forms. Urine is a nitrogen-rich liquid fertilizer with N concentrations of 3 to 7 grams per liter of urine. An adult produces between 0.8 and 1.5 liters of urine per day.</font></font>
-<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">The use of human urine in plant production represents low health risks if there is no of little feacal cross-contamination. Pharmaceutical residues and hormones are excreted with urine. However, the risk of negative impacts on plants or human beings is thought to be negligible. The risk of using human urine as a fertilizer is far lower than the risk associated with using sewage sludge or farmyard manure for example. Storage is a simple, efficient and cheap method for treating collected urine. More complex treatment methods include technologies such as reverse osmosis, ion exchange, freeze/thaw, stripping/adsorption, nitrification, nanofiltration, ozonation or struvite precipitation.</font></font>
+<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">According to the EcoSanRes Practical Guidance on the Use of Urine in Crop Production<ref>Richert et al. (2011): Practical Guidance on the Use of Urine in Crop Production. EcoSanRes Series 2010-1. http://www.ecosanres.org/pdf_files/ESR2010-1-PracticalGuidanceOnTheUseOfUrineInCropProduction.pdf (Access 2013-12-30)</ref>, the use of human urine in plant production represents low health risks if there is no of little feacal cross-contamination. Pharmaceutical residues and hormones are excreted with urine. However, the risk of negative impacts on plants or human beings is thought to be negligible. The risk of using human urine as a fertilizer is far lower than the risk associated with using sewage sludge or farmyard manure for example. Storage is a simple, efficient and cheap method for treating collected urine. More complex treatment methods include technologies such as reverse osmosis, ion exchange, freeze/thaw, stripping/adsorption, nitrification, nanofiltration, ozonation or struvite precipitation<ref>Maurer et al. (2006): Treatment processes for source-separated urine. Wat Res 40:3151-66.</ref>.</font></font>
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">During storage, urine sludge is generated as a result of the degradation of urea to ammonium. The sludge is composed of phosphate, magnesium, calcium and ammonium precipitates. It can be mixed with the supernatant and used with the rest of the urine.</font></font>
 = <font face="Arial, sans-serif"><font size="3">'''Brown Water (feces)'''</font></font> =
@@ Line 43: / Line 41: @@
 <font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Although feces contain lower nutrients than urine, the concentration of phosphorus and potassium is high. Feces also contain organic matter, which improves the water-holding and buffering capacity as well as the structure of soils.</font></font>
-<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Contrary to urine, feces contains large amounts of pathogens. Therefore, safe handling and treatment of feces are crucial in order to minimize disease transmission. The risk of odors, flies and number of potential pathogens in the feces can be reduced by adding ash after each defecation in a dry system. This is referred to as primary treatment. Secondary treatment takes place when the collection period is completed. The various options include composting, digestion, storage, chemical treatment and incineration.</font></font>
+<font face="Arial, sans-serif"><font size="2" style="font-size: 11pt">Contrary to urine, feces contains large amounts of pathogens. Therefore, safe handling and treatment of feces are crucial in order to minimize disease transmission. The risk of odors, flies and number of potential pathogens in the feces can be reduced by adding ash after each defecation in a dry system. This is referred to as primary treatment. Secondary treatment takes place when the collection period is completed. The various options include composting, digestion, storage, chemical treatment and incineration<ref>Jönsson et al. (2004): Guidelines on the Use of Urine and Faeces in Crop Production. EcoSanRes report 2004-2. http://netssaftutorial.com/fileadmin/DATA_CD/04_Step4/SE5._Guidelines_on_the_use_of_urine_and_faeces.pdf (Access 2013-12-30)</ref>.</font></font>
 = <font face="Arial, sans-serif"><font size="3">'''Greywater'''</font></font> =
@@ Line 51: / Line 49: @@
 = <font face="Arial, sans-serif"><font size="3">'''Examples'''</font></font> =
-<br/>
+*Novaquatis, eawag, Switzerland (http://www.novaquatis.eawag.ch/index_EN)
-<br/>
+= <font face="Arial, sans-serif"><font size="3">'''References'''</font></font> =
-= <font size="3"><font face="Arial, sans-serif">'''Further reading'''</font></font> =
+<references />
 <br/>
-<br/>
+= <font face="Arial, sans-serif"><font size="3">'''Further readings'''</font></font> =
-= <font face="Arial, sans-serif"><font size="3">'''References'''</font></font> =
+[http://www.ecosanres.org/index.htm http://www.ecosanres.org/index.htm]
-<references />
+[http://www.susana.org/ http://www.susana.org/]