Tag Archives: sludge reuse

33rd AGUASAN Workshop: “Circular economy – transforming waste into resources”

The 2017 AGUASAcircular-economyN Workshop will focus on analysing successful and failed approaches for transitioning from linear to circular water and sanitation models.

The workshop takes place from June 26 to 30, 2017 in Spiez, Switzerland.

Circular economy has great potential to drive the Water and Sanitation 2030 Agenda forward because it aligns directly with the Sustainable Development Goal (SDG) 6.3 of improving water quality and substantially increasing recycling and safe reuse globally and SDG 6.4 of substantially increasing water-use efficiency across all sectors and ensuring sustainable withdrawals.

Key questions and issues: 

  • What does the circular economy concept entail?
  • Which flows are relevant?
  • Which stakeholders need to be involved and how?
  • How can demand for recovered products be created?
  • In which context do these stakeholders act?
  • What are the drivers and barriers influencing the transition towards a circular economy?
  • Which circular economy approaches can we learn from for overcoming the identified
  • How should change from linear to circular water and sanitation be managed?
  • How can health risks be managed?
  • How to address public perceptions associated with recycling and reusing of human waste?

Please find the invitation letter, announcement and pre-registration on the website: www.aguasan.ch. Registrations will be accepted until March 19th, 2017.

AGUASAN is an interdisciplinary Swiss Community of Practice (CoP) that brings together a broad range of specialists to promote wider and deeper understanding of key water and sanitation management issues in developing and transition countries. It builds on committed sector professionals from various specialised institutions involved in Swiss development cooperation, humanitarian aid and research. Since 1984, the CoP provides an exemplary, vibrant and most pertinent exchange platform and think-tank serving the water sector, and constitutes an essential link in the innovation and knowledge management strategy of the Swiss Agency for Development and Cooperation (SDC). Besides convening quarterly knowledge sharing events, every year members of the CoP organise an international AGUASAN Workshop in Switzerland

 

Do it differently: Toilets are not enough to achieve sanitation, India must reinvent the waste business

Do it differently: Toilets are not enough to achieve sanitation, India must reinvent the waste business. by Sunita Narain, Times of India, February 11, 2017.

The most important programme of this government is Clean India – not just of corruption, but of the muck and filth that is taking over our rivers, our air and our cities.

But equally (and more) important is the agreement that this ‘cleaning’ up is not possible unless we can provide every Indian with toilets that work and toilets that are connected to systems that will safely dispose human excreta, to prevent further pollution of our environment and create another source of bad health.

This agenda is therefore, not just about building toilets but about building sanitation systems that are affordable by all. Only when growth is affordable and inclusive can it be sustainable.

But this is where the opportunity also lies in doing things differently. Till now, the paradigm for urban sanitation has been costly. It has been based on the idea that building toilets is enough to clean the country.

But the excreta sums of different cities, or what we call the city’s “shit-flow” diagram, shows that the situation is grim. Today’s cities do not treat or safely dispose the bulk of human excreta generated.

Read the complete article.

Sewage sludge could make great sustainable fertilizer

Sewage sludge could make great sustainable fertilizer | Source: Phys.org, Aug 15 2016 |

Ever thought of putting sewage on your plants? Scientists say thermally conditioned sewage sludge serves as an excellent fertilizer to improve soil properties. This was recently published in the open-access journal Frontiers in Nutrition. The major advantage over commercial fertilizers? Sustainable re-use of essential and finite phosphorus resources.

Phosphorus is a key nutrient for all living beings. When deficient in the diet, it severely compromises human health, and when deficient in agriculture, it restricts crop productivity. Without , there can be no food production.

As the source of phosphorus is non-renewable phosphate rocks, there is a strong need for increased recycling to ensure phosphorus security. Efficient use and reduced environmental dissemination of phosphorus throughout the food system is needed to secure the ability to feed a growing global population.

As technological improvements increased the of , it now is a readily available alternative to commercial fertilizers in agriculture. To assess its effectiveness, Andry Andriamananjara from the University of Antananarivo (Madagascar) and his colleagues used a phosphorus radiotracer technique to measure the availability of phosphorus for plants in thermally conditioned sewage sludge.

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