Bucket bokashi to get a rich fertilizer from organic waste. Made for a kitchen use.
Every year, the waste production of French people is about 320 kg per person (about 90 bags) with 120kg of organic waste that could be recovered. For instance, they can be used as fertilisers for crops
It is quite simple to compost our organic waste in the countryside. In the urban areas, where ¾ of the French population lives, it is more complicated. Thus, the potential of waste composting is very important.
The compost production from organic waste encourages the cultivation of vegetables and fruits at home. In urban areas, the objectives are diverse:
Bokashi (“fermented organic material” in Japanese) is a very efficient composting method that can be adapted to the urban context. (It uses what we call the Efficient Micro-organisms (EM).) It implements the Efficient Micro-organisms (EM).
What are the Efficient Micro-organisms ?
In the wildlife, the degradation into humus of the (organic material) organic matter is done through the fauna and the flora consisted of fungus and bacteria. These “efficient” micro-organisms represent about 10% of the existing micro-organisms. The EMs are a mix of 80 selected strains from these specific micro-organisms. Their presence in composting is used to imitate the performance of a healthy humus and to optimise the degradation of the organic matter.
The type of compost using these micro-organisms is called “Bokashi”.
It is worth noticing that the EMs can be used on crops (out in the field) in the ground to bring back life in poor soil. However, it is not to be used on a healthy soil as the EMs may be detrimental to the soil balance through their actions.
It is possible to locally source the strains to make your own Efficient Micro-organisms. This still requires to master the process. Here is a link to try out/experiment this process (link). The easiest way is to order the strains online. In France, you can order them through Bertrand Grevet, an expert on the EMs. There are two types of Ems:
How does the Bokashi work ?
The bokashi is produced through the organic waste fermentation, inseminated with EMs A. It operates in an anaerobic process (without any oxygen supply). It has to be hermetically sealed after each use for the good development of the bacteria, between 20°C to 25°C. The composting outputs are:
The process is pretty quick, which enables the use of a small container. Added to the fact that it is hermetically sealed, the bokashi fits well with an urban environment, and off the ground: it is closed, does not smell, and its juice is ready for use in off-ground cultivation. This tutorial is edited with the help of Léon-Hugo Bonte, landscaper and decorator, proponent of the indoor off-ground cultivation, regular user of the bokashi and the EMs for several years.
Watch the tutorial video HERERetrouvez dans ce rapport une analyse à l'usage de ce compost Bokashi, ainsi que des 11 autres low-techs expérimentées lors du projet En Quête d'un Habitat Durable.
One is the compost box.
One is the elevator .
One is the receiver.
Note: The tap must be placed as low as possible on the receiver bucket in order to get as much juice as possible. However, plan the necessary high for the tightening nut.
Note: the plastic composing the bucket is pretty thin, so this tasks has to be done with precision
Note:This layer is used as a drain for the composter, so that the holes don’t get clogged.
Note: Composting is faster if organic matter is cut into small pieces.
Note: Once the compost is well started (2 to 3 weeks), a small amount of bokashi juice can be taken daily.
Note: The condition and color of the leaves are good indicators of the nutritional needs of a plant.
Note : When the compost bin is full (after a few weeks or a few months), there is more degradation in the bottom of the tank than above.
After 15 days: plant your vegetables by superimposing in a pot: a thin layer of fertile ground, a layer of your compost (1 cm) and fill the rest of fertile ground.
Note: Your compost is now very rich in minerals but also in micro-organisms. The mineral mixture is an excellent food for plants. The bacterial flora will colonize the soil developing a rich living environment for the roots.
However, the bokashi is acidic: It is therefore important to place it at the bottom of the pot to prevent the roots from being in contact with it when repotting.
Vous pouvez télécharger une fiche pédagogique créée par le Low-tech Lab à l'occasion de l'exposition "En Quête d'un Habitat Durable" dans la partie "Fichiers" du tutoriel (onglet au niveau de la section "Outils-Matériaux").
Vous avez une minute ? Que vous souhaitiez ou non réaliser cette low-tech, votre réponse à ce formulaire nous aiderait à améliorer nos tutos. Merci d'avance pour votre aide !
Like all the work at Low-tech Lab, this tutorial is collaborative. Don't hesitate to add modifications that seem important, and share your results in the comments.