6th International Conference on Sustainable Solid Waste Management - - PowerPoint PPT Presentation

Composting of dry toilets solid residues: evolution of the characteristics over time

Dr Joaneson LACOUR, UNIQ Dr Rémy BA YARD, INSA Lyon Dr Pascale MARTEL NAQUIN, CEFREP ADE Gaston JEAN

6th International Conference on Sustainable Solid Waste Management

NAXOS 2018

PLAN

• CONTEXT
• OBJECTIVES
• PRESENTATION OF THE PILOTS
• RESULTS OF 100 L PILOTS (P1)
• RESULTS OF 300 L PILOTS (P2)
• CONCLUSION

• 2,4 billion people without toilets (WHO / UNICEF, 2016)
• 71% live in rural areas
• More than 1 billion people (15% global pop) practice open

defecation

• Open defecation is practiced by 90% in rural areas (WHO / UNICEF,

2013).

• Almost no collective sanitation system in developing countries
• 90% of poorly treated or untreated wastewater, responsible for

many risks of contamination (WHO)

• Contamination of water by waste / excreta would be responsible of

80% of diseases and 25% of deaths (WHO)

CONTEXT 1/2

CONTEXT

In Haiti

• 72% of the population have no access to a proper sanitation system,

including 15% in the metropolitan area of Port au Prince and 18% in

• ther cities (UN, 2016).
• Polluting latrines ‐ Numerous open defecation sites
• 23% of the population practices open defecation, 41% in rural areas
• In some communities, especially in unconventional communities,

people defecate in plastic bags that they drop anywhere. This phenomenon is called flying toilets.

• Water‐borne diseases are responsible for 17.5% of morbidity and

mortality of children under 5 years of age (MSPP, 2005).

• Microorganisms of faecal origin have been detected in numerous

samples of groundwater (Balthazard‐Accou et al., 2009)

OBJECTIVES

• Fight

against

• pen

defecation by empowering communities and increasing the number of toilets

• reduce

the number

• f

cases

• f

waterborne diseases by hygienizing faeces through composting

• Return the biomass to the soil

DRY DIVERSION TOILET MODEL

Residues collected over 12 months

Masse totale collectée (kg) ‐ 23 familles 3846 Nombre de jours 381 Masse moyenne par jour (kg) 10,1 Masse moyenne par jour et par personne (kg) ‐ 88 personnes 0,11

RESIDUE, FAECES AND HUMIDITY

PRESENTATION OF PILOTS 100 L

5 first 100-liter pilots have been launched to monitor the rise in temperature and the quality of residues.

P1 Water P2 Water + aerated by pieces of wood P3 Water + flipping P4 urine P5 Without specific conditions

TEMPERATURE EVOLUTION ‐ PILOTS 100L

PRESENTATION OF PILOTS 300 l 2/2

Series of 300‐liter pilots

P1:Bagasse‐Pin 2/3 P2:Bagasse‐Frêne 2/3 P3: Bagasse 100% P4: Bagasse 100%+ branchage P5: Frêne100%+ branchage

TEMPERATURE EVOLUTION ‐ PILOTS 300L

CONCLUSION

When the residues are composted with significant volume, the temperature reached is favorable for a fast hygienization Dry litter toilets seem to be a good answer to fight against

• pen defecation, very well accepted by the population

This presentation shows a little part of the work conducted, still in progress, whose entire results, on the social, economic, environmental and sanitary aspects will be presented for my doctorate defense in December 2018

Thanks for your attention !