19 JunBokashi


Posted by: http://www.compostguy.com/bokashi-resource-page/


For quite some time I’ve been meaning to learn more about the topic of bokashi.

It seemed to be an interesting waste management method that quite a few people were talking about, and given my interest in various types of composting it only made good sense for me to see what all the fuss was about.

What Is Bokashi?

Bokashi is a Japanese term meaning ‘fermented organic matter’.

It is often referred to as a type of ‘composting’ but it is actually a anaerobic fermentation process, resulting in a much different end product than that produced via composting.

Many people like bokashi because it is very easy, and generally (bad) odour-free. All that is needed is a bucket (with lid), some special bokashi mix, and of course some organic waste.

This is a very basic overview – we’ll talk in much more detail about how to set up a bokashi bucket in the ‘Getting Started’ section.

Why Bokashi?

There are a many good reasons for getting into the habit of NOT tossing your organic waste into the trash.

As discussed on the Composting Basics page, organic waste makes up a considerable proportion of the total waste stream that ends up in the landfill (typically in the vicinity of 20-40%).

This is unfortunate since, apart from needlessly taking up dwindling landfill space, these materials can easily be diverted and turned into a rich organic fertilizer (among other things).

Getting Started With Bokashi

As discussed above, there are really only 3 important things needed to get started with bokashi
1) Waste materials
2) A bokashi bucket, and
3)Bokashi mix

Waste Materials

As I listed in the advantages of bokashi, you can add pretty well any type of food waste to a bokashi bucket.

If you an are active composter you will likely know that there are some materials not recommended for a compost pile or worm bin namely meats, oily foods and dairy. I’m still in the testing phase of this myself

I added some steak scraps and shrimp waste to one of my buckets and will be very curious to see how quickly these materials are broken down once they are added to an aerobic composting bin.

Bokashi Bucket

Experts typically recommend that you use a bucket with a spigot on it, so that you can drain the liquid that accumulates in the bottom as the waste materials decompose.

Interestingly enough, some report that this liquid can be used as a plant fertilizer or even poured down your drain to eliminate odours.

You can purchase complete bokashi kits (such as the one pictured to the right) if you want to do everything by the book.

These commercially made buckets even have a false-bottom floor that keeps the waste materials separate from the leachate.

For my preliminary bokashi experimentation I’ve simply been using regular plastic buckets with tight fitting lids.

I added a layer shredded cardboard in the bottom to help prevent excess moisture from pooling.

I would like to eventually purchase a bucket that has been designed specifically for bokashi, but for now my buckets seem t be working ok.

Bokashi Mix

The key component of a successful bokashi bucket is of course the bokashi mix – typically consisting of wheat bran inoculated with a special mixture of microbes, variously referred to as ‘effective microorganisms’, ‘friendly microorganisms’, or ‘efficient microorganisms’.

,The easiest (but most expensive) option is to purchase this mix ready-made – typically if you buy a bokashi kit it will include a bag of the microbial mix.

If you are a more adventurous type you can also make it yourself.

As I discovered, this is in fact much easier and enjoyable than it sounds, but there are some important things to keep in mind. Making the mixture is very easy, but it’s the drying stage that may create some inconvenience for some people.

In hindsight I’m very glad I only ended up making a small amount (enough to fill two ziploc freezer bags), because the drying material took up a lot of space and it gave off a pretty powerful odour (I won’t say it was bad, but it was certainly…obvious)

While I suppose you don’t really have to dry the mixture out, this will definitely increase the shelf-life of the material – especially important if you are making large quantities.

In order to make the mix you will need some wheat bran, molasses, and some liquid microbial inoculum.

Some suggest adding various other goodies as well (such as rock dust, kelp etc), but I decided to keep it simple and just go with the basics.

Below is a great video from Neal ‘The Podchef’ Foley, from the Kitchen Garden Food Company. It demonstrates how to make the bokashi mix.


Once you have all of the 3 key components discussed above you are ready to get started. As mentioned, filling your bokashi bucket is incredibly easy. You simply add food scraps to your bucket, along with a handful of bokashi mix over top – that’s it! Continue doing this until you’ve filled the bucket completely.

You may want to use a heavy plate of some sort to help press down the materials in the bucket.

This will encourage the development of anaerobic conditions.

I simply pressed the food down each time then put the lid on the bucket and everything seemed to work as claimed (i.e. no bad odours etc).

Once your system is completely full, simply seal it up and let it sit for a couple of weeks so that it can further decompose.

Any time after that you can dig the contents directly into your garden or add them to your compost pile or bins.