Some time ago, we were bragging about bulk buying and the advantages it could have, particularly in the management of plastic waste. But other than the packaging, do you know what is left in your garbage can? (What’s for sure is that there are no more disposable sanitary pads since you switched to period panties!)
In France, 30% of the waste produced by a household is organic waste that is immediately sent to incineration. Did you know that there is a lot we could do with your vegetable peels and egg shells?
Composting means recycling organic waste. It makes it possible to produce fertilizer for our plantations or biogas thanks to methanization!
Composted organic waste is crushed, mixed with wood (to ensure good aeration) and stacked in piles in the open air. They are then left out there for six to ten months, and flipped over every month. Bacteria, worms and fungi will colonize the mass of biodegradable waste and feed on the nitrogen and carbon present. Such biological activity can raise the temperature in the centre of the pile up to 65°C!
Another way to recycle organic waste is through methanization. The waste is enclosed in watertight tanks called “digesters”, where it ferments in the absence of oxygen. After a month, a gas is formed consisting of 50 to 70% methane. The organic residue called “digestate” can be used as fertilizer, and gas to produce heat, electricity or as a fuel.
As you may have understood, recycling organic waste makes it possible to create compost and biogas. Thanks to a production of 3846 tonnes of compost, the Ile de France region generated more than 115,000€ in 2007. At 30€ per ton, crazy, isn’t it?!
As mentioned above, on average 30% of our waste is organic. Put altogether, that’s tons of compost! And not only does it create fertilizer or gas, but it also reduces the volumes processed by the conventional incineration process. Just killed two birds with one stone!
We already know what’s coming: it’s nice to want to optimize your bio-waste, but not easy to have your worm composter system in your kitchen…
Since the first collective composter in 2008, many initiatives have been launched to create a composting network in the city. These collective composters are mainly installed in shared gardens, but also at the foot of buildings. Shared gardens are green spaces cultivated and animated by the people of the neighbourhood. It is an open living space that encourages encounters between generations and cultures.
Two superb gardens that have collective composts are the Jardin Catherine-Labouré (7th arr.) and the Jardin des Rosiers – Joseph-Migneret (4th arr.)
If you feel like you’re ready, here are a few interesting links to get started :