Bokashi vs Composting: An In-depth Analysis

The pursuit of sustainable living practices has led to a growing interest in methods to recycle organic waste.

Among the various techniques available, bokashi fermentation and traditional composting stand out as popular choices for transforming kitchen scraps into valuable soil amendments.

While both processes aim to recycle organic matter, they differ significantly in their methodologies, outcomes, and applications.

This article goes into the specifics of bokashi and composting, comparing them across various dimensions to help you decide which method best suits your needs.

What is Bokashi Fermentation?

Bokashi is a Japanese word meaning “fermented organic matter.” It is an anaerobic process (occurring in the absence of oxygen) that uses a specific mix of microorganisms to ferment organic waste.

This mix, often sold as bokashi bran, is sprinkled over kitchen scraps in a sealed container. The fermentation process pickles the waste, preventing it from rotting and emitting foul odors.

After a couple of weeks, the fermented material can be buried in the garden soil, where it quickly breaks down, enriching the soil with nutrients and beneficial microorganisms.

Bokashi vs Composting

1. Process:

• Bokashi: Anaerobic fermentation, requiring a sealed container to create an oxygen-free environment. It’s a fast process, typically taking about two weeks for the initial fermentation, plus a few more weeks after burying the material in soil to fully integrate into the soil.
• Composting: Aerobic decomposition, requiring oxygen, moisture, and a balance of “greens” (nitrogen-rich materials) and “browns” (carbon-rich materials). The timeline varies, usually taking a few months to produce finished compost.

2. Input Materials:

• Bokashi: Can process almost all kitchen waste, including meat and dairy products, which are typically not recommended for traditional composting due to the risk of attracting pests and producing odors.
• Composting: Best suited for plant-based kitchen scraps, yard waste, and other organic materials. Meat, dairy, and oily foods are generally avoided.

3. Output:

• Bokashi: Produces a fermented material that needs to be buried in soil to finish breaking down. It also produces a nutrient-rich “tea” that can be diluted and used as a liquid fertilizer.
• Composting: Results in humus, a stable soil amendment that can be directly applied to garden beds as a mulch or soil conditioner.

4. Space and Location:

• Bokashi: Ideal for small spaces, including apartments, as the fermentation occurs in a sealed container that can be kept indoors without odors.
• Composting: Requires more space and is typically done outdoors, although small-scale indoor composting systems are available.

5. Environmental Impact:

• Bokashi: Low emissions due to its anaerobic nature and the ability to process almost all types of kitchen waste, reducing landfill contributions.
• Composting: Reduces organic waste in landfills and emits CO2 rather than methane (a more potent greenhouse gas), especially when managed properly to maintain aerobic conditions.

Both bokashi and composting offer environmentally friendly solutions for recycling organic waste, each with its unique benefits.

Bokashi is excellent for those with limited space, needing a quick process that can handle a wider variety of waste materials, including meat and dairy.

Traditional composting, on the other hand, is well-suited for those with more outdoor space and time, wanting to produce a direct soil amendment while engaging more deeply with the natural decomposition process.