What Is Biochar? Complete Guide to Production, Uses & Types
Biochar has become one of the most valuable natural materials in modern agriculture, water treatment, and environmental restoration. Whether you’re improving poor soils, restoring ponds, reducing algae blooms, or increasing crop yields, biochar gives long-term, measurable benefits that other amendments cannot match.
But to choose the right type of biochar powder, small, medium, or chip you need to understand what biochar really is and how it is made.
This guide explains everything clearly and includes real examples from our Chitosan Global Biochar product line, so you can confidently select the best grade for your farm, pond, garden, or industrial project.
What Is Biochar?
Biochar is a carbon-rich material produced by heating organic biomass (wood, plant matter, agricultural residues) in an oxygen-limited environment. This process creates a highly porous, stable form of carbon that lasts in soil and water for hundreds of years.
Biochar is NOT ash
Ash is what remains after complete combustion.
Biochar is produced without burning which keeps the carbon intact.
Biochar works like a “carbon sponge”
Its microscopic pore system improves:
Soil structure
Water retention
Microbial activity
Nutrient efficiency
Wastewater filtration
Algae and odor reduction
Because of this, farmers, landscapers, pond managers, and remediation companies use biochar to solve problems naturally and cost-effectively.
How Biochar Is Made (The Real Science Behind It)
The process that creates biochar is called pyrolysis heating biomass at high temperature without oxygen. This prevents burning and instead converts the material into stable carbon.
There are two main types:
1. Fast Pyrolysis
Very high temperatures
Rapid heating of biomass
Produces bio-oil and gas as primary products
Biochar output is smaller and less consistent
Fast pyrolysis is used mainly in industrial bio-oil production not for high-grade biochar.
2. Slow Pyrolysis (Used for All Chitosan Global Biochar Products)
Slow pyrolysis is the gold-standard method for producing agricultural and environmental-grade biochar.
Key features:
Low–moderate temperatures: 350–700°C
Slow heating rate: prevents material from burning
High carbon retention
Uniform pore structure
Ideal for soil and water applications
Because the feedstock is heated gradually, slow pyrolysis results in high-quality, consistent, porous biochar perfect for:
Soil health
Water treatment
Algae control
Remediation
Industrial filtration
All Chitosan Global Biochar products are made with slow pyrolysis for maximum performance and carbon stability.
Why Biochar Works: The Benefits Explained
1. Improves Soil Health
Biochar increases soil carbon and acts like a reservoir for nutrients and beneficial microbes.
2. Reduces Fertilizer Cost
Biochar prevents nutrients from washing away, allowing plants to use more of what you apply.
3. Controls Algae in Ponds
Biochar absorbs nitrogen, phosphorus, toxins, and suspended solids starving algae of food.
4. Enhances Water Filtration
Its porous structure filters contaminants in ponds, aquaculture, and wastewater systems.
5. Supports Microbial Growth
Good microbes colonize biochar quickly, improving soil and water biology.
6. Long-term Carbon Sequestration
Biochar stores carbon in a stable form for hundreds of years making it one of the most sustainable solutions available.
Biochar Types (Which One Do You Need?)
At Chitosan Global, we provide four main product varieties, each for different needs and industries.
1. Powder Biochar – “Baking Flour” Grade
Best for:
Fine soils
Seed starting mixes
Composting
Turf improvement
Small-scale gardening
Blending with fertilizers
This is our finest biochar grade. The texture is similar to baking flour and blends smoothly into soils or compost. Because of its microscopic pore size, it provides the highest surface area perfect for microbial colonization.
Product: Powder Biochar – Baking Flour Grade
2. Small Biochar – “Grain of Sand” Size
Best for:
Garden beds
Vegetable and fruit crops
Raised beds
Vineyards
Landscapes
Biochar-compost blends
This grade improves soil structure, moisture retention, and nutrient delivery. It mixes easily with soil without clumping.
Product: Small Biochar – Grain of Sand
3. Medium Biochar – “Grain of Rice” Size
Best for:
Agricultural fields
Orchards
Commercial farms
Erosion control
Mulch blends
Medium biochar provides strong aeration and water-holding capacity. Ideal for large-scale land applications.
Product: Medium Biochar – Grain of Rice
4. Biochar Chip – 1″ Size
Best for:
Filtration
Drainage improvement
Stormwater management
Large ponds
Shoreline stabilization
Industrial systems
Biochar chips allow heavy-flow water to pass while capturing nutrients, toxins, odors, and suspended particles.
Product: Biochar Chip – 1″ Size
5. 8″ Diameter Biochar Socks – Algae Treatment
These are one of the most powerful tools for pond and lake restoration.
Biochar socks work by:
Removing phosphorus and nitrogen
Binding algae-causing nutrients
Reducing odors
Improving clarity
Creating natural biological balance
Perfect for homeowners, farms, aquaculture systems, irrigation ponds, and golf courses.
Product: 8″ Biochar Socks – Algae Treatment
How to Choose the Right Biochar (Simple Guide)
Gardening / Soil improvement
→ Powder or Small
Large farms / orchards
→ Medium
Ponds, lakes, algae problems
→ Biochar Socks or Chip
Filtration & wastewater
→ Chip (1″)
Biochar Application Rates (General Guide)
Gardens & Lawns
5–15% blend with soil
Or 2–5 lbs per 10 sq ft
Agricultural Fields
1–2 tons per acre
Mix with compost or manure for best results
Ponds & Lakes
1 sock per 1,000–3,000 gallons
Replace every 30–60 days depending on nutrient load
Composting
Add 5–10% by volume
Accelerates compost maturity and reduces smell
Why Chitosan Global Biochar Is Different
Unlike generic biomass char sold online, Chitosan Global Biochar is:
Produced using controlled slow pyrolysis
Ensures purity, pore uniformity, and high carbon content.
Screened into consistent sizes
Powder, sand-size, rice-size, and chip ensure exact performance for each application.
Sourced sustainably
We use selected agricultural and wood feedstocks, generating clean, stable carbon.
Made in the USA
Serving farms, pond managers, landscapers, and soil health professionals nationwide.
Biochar Is the Most Powerful Natural Tool for Soil, Water & Environmental Health
Biochar is more than a soil amendment. it’s a long-term environmental solution.
Whether you’re growing healthier crops, restoring a pond, improving soil structure, or reducing algae, the right type of biochar makes all the difference. Chitosan Global provides high-quality, slow-pyrolysis biochar in multiple grades so you can match the exact needs of your land, farm, garden, or project.