📰 Circular management of human excreta as a pillar of sustainable cities and food systems
https://hal.science/hal-05478504
This is the written summary of a presentation I gave at the annual meeting of the International Fertiliser Society (you can watch the presentation here: https://video.ploud.fr/w/qb3a8rXPxW7QQmWN7uBBKS)
I discuss the limitations of sewer-based sanitation in the face of climate change and increasing water scarcity: can we still afford the amount of water that is needed for sewers to effectively carry fecal matter all the way to the treatment plant?
Obviously I also mention how alternative management methods are being tested throughout Europe, including in large neighborhoods in Hamburg, Sneek, or Helsingborg (and soon Paris).
#circularity #circularEconomy #environment #sanitation #fertiliser #toilets #sustainability #sustainableCities #WWTP #sewers
Human excreta (urine and faeces) is a major nutrient deposit; in the context of sustainable agri-food systems, it would in fact constitute the largest source of renewable phosphorus. However, current management through sewer-based sanitation leads to significant degradation of this resource as well as to the loss of the majority of the nutrients to the environment. This article details the flows of nitrogen throughout the French sanitation system and discusses the levers and obstacles to nutrient recovery in sewer-based sanitation systems. Using monitoring data from wastewater treatment plants (WWTPs) as well as records on population and dietary intakes, we assessed the flows of nutrients from food, through sanitation systems, and to the environment or environmental parcels. The mass flow diagram showed that 90% of the nitrogen and 50% of the phosphorus entering the system were not returned to agricultural fields but lost to the environment, thus inducing an intrinsic dependence on external nutrient imports. Though legislation has contributed to reducing water pollution by limiting the amount of nutrients discharged to the water, they have had little effect on recycling, especially for nitrogen. Further regulations on WWTPs are unlikely to enable the high nutrient recycling rates that could help secure domestic fertilizer supply chains. Because of this and given the vulnerability of sewer-based sanitation in the face of climate change and increasing water scarcity, we investigate the potential of excreta source-separation to provide high-quality resources for bio-based fertiliser production. We show that, if secured to fertilise crop production for human consumption, the nutrients in French excreta could cover a third of the nutrient requirements of domestic food consumption.
hi again #FediFriends 👋
does anyone know of any #tailors / #sewers or online services in #Canberra (or elsewhere in Aus) that can re-do a #tshirt #neckline & insert a proper elasticsted neckband?
I have a bunch™ of #tshirts that claim to be unisex but have terrible, tight neck holes (that’s a word, right? 🤪) that I rarely wear but absolutely would if I can get them fixed – I don’t have the necessary skills or equipment & tbh don’t really wish to invest the time but will happily exchange money for goods & services…
pls #boost4reach thx
Auckland Sewers
Methamphetamine, morphine, methadone, and cocaine found in Auckland sewer system.
Where’s the crocodiles?
#Auckland #AucklandComedy #Comedy #Crocodiles #NZComedy #Sewers
Kind of hard to drain the swamp when the sewers don't work, huh, Trump?
Deep funding cuts under President Donald Trump will make it more difficult for struggling communities to get help to fix sewer systems that put health and homes at risk. Cuts include grants, loans and technical help promised by the Biden administration to address racial and economic disparities. The cuts threaten to widen infrastructure inequality. Many cuts are part of Trump’s war on diversity, equity and inclusion. That includes a $14 million grant to help install septic systems in several majority-Black Alabama counties where many residents must pipe sewage from their homes onto their own property because it has nowhere else to go.
Sewer impresario - Joseph Bazalgette
💦
#bazalgette #london #sewers #Londonsewers #plaque #sewerage #seweragesystem #nikonz8
#snap_community_member #snap_challenge #snap_artgallary #snap_edit #snap_kingdom #snap_community #snap_colour #snap_raw #snap_uk #snap_vip_member #snap_plaque #snap_london #snap_street #snap_outdoors
Quake Map of the Day
TJ
Tanguy Fardet
itgrrl 
A Joke A Day
Bi Sasquatch
nickharrison
fak