Turning agricultural waste into cash: Could Japanese high-tech composting revolutionize farming?
During a recent trip to Romania, I got a firsthand look at a different side of modern agribusiness.
· Turning livestock waste into high-value organic fertilizer.
· Generating and selling carbon credits.
I visited two major agricultural operations:
DN AGRAR Group, Romania’s largest integrated dairy producer with 10,000 cows divided between two farms, milked with Dairymaster 72 point rotary.
Agroland poultry operation near Bucharest housing roughly 750,000 laying birds.
Both farms rely on Kohshin aerobic composting technology to process manure. While the transformation of raw manure into marketable, nutrient-rich fertilizer was impressive on its own, one detail that intrigued me was both operations are generating carbon credits although it was not clear to me if they have been converted to cash yet.
1. The Technology: What Makes Kohshin Composting Work?
DN Agrar initialmanagement of slurry was not unusual. The freestall barns were scraped with a combination of automatic and tractor scrapers. The slurry was then separated with the liquid stored in a lagoon. The solids then went to the Kohshin composting facility on site.
The Kohshin rapid composting process is an advanced, automated aerobic system designed by Kohshin Engineering to rapidly convert livestock manure and bio-waste into stable, high-quality organic fertilizer. The process eliminates pathogens and foul odors by maintaining strict aerobic conditions without needing chemical additives.
The operation runs in two primary phases:
Pre-Composting with the Soilath® Aeration System:
Raw waste is first placed into an aerated pit for a 6 to 8-day pre-conditioning cycle. The Soilath System utilizes an arrangement of smart, wireless sensors that track internal temperature, oxygen, ammonia levels, and ambient humidity. This real-time data is synced online, allowing operators to remotely adjust automated blower timers. By optimizing air injection, it "awakens" naturally occurring aerobic bacteria, driving the pile into a thermophilic state (60–70°C) that kills pathogens and weed seeds while suppressing foul anaerobic gases.
2 Agitation via the Kohshin KN6000 Composter:
The pre-conditioned material is transferred to the KN6000 composting line (such as the KNLL-6000 series), which operates inside a concrete pit. The machine automatically moves daily from the output side to the input side, using specialized hatchet-type blades to uniformly chop, turn, and push the material forward. Built-in forced under-floor aeration maintains oxygen levels. Over a 30 to 40-day cycle, continuous mechanical agitation maximizes surface air contact, completes organic decomposition, and naturally pelletizes the final product.
The resulting fertilizer is highly stable, entirely odorless, and ready for commercial agricultural use
Continuous Aeration & Mechanical Turning: The machinery continuously mixes, homogenizes, and injects oxygen into the manure bed.
Rapid Moisture & Pathogen Reduction: Pathogens and weed seeds are heat-sanitized naturally as internal compost temperatures rise above 70°C, stripping out excess moisture in days rather than months.
Commercial Fertilizer Production: The output is a dry, granular, and virtually odorless organic fertilizer. The farms sell this finished product directly to crop growers, commercial nurseries, and vineyards.
2. The Mechanics: How Composting Generates Carbon Credits
How does turning manure into compost generate verifiable carbon offset credits? It comes down to methane avoidance:
The Baseline (Anaerobic Storage): When untreated manure sits in deep lagoons or thick stockpiles, oxygen is cut off. Microbes break down the waste anaerobically, releasing methane. Methane is a potent greenhouse gas with a global warming potential roughly 28 to 30 times higher than carbon dioxide over a 100-year period.
The Project (Aerobic Composting): Aerobic fermentation prevents anaerobic conditions from forming. Oxygen-loving bacteria break down organic matter into stable humus, releasing harmless water vapor and biogenic .
The Carbon Offset: For every metric ton of methane prevented from forming, the farm earns equivalent carbon credits measured in tons of equivalent.
DN AGRAR pursues Gold Standard certification for its Kohshin-equipped composting facilities (such as its installation at Apold farm). Gold Standard certification ensures that emission reductions are independently measured, reported, and verified (MRV).
3. The Payout: How Much Cash Do These Credits Earn?
Farms rarely share exact carbon revenue figures due to non-disclosure agreements, fluctuating spot market prices, and third-party aggregator splits. However, analyzing typical Voluntary Carbon Market (VCM) dynamics provides a clear picture of potential financial returns.
Estimated Carbon Economics for a 750,000-Bird Poultry Farm
A 750,000-bird poultry facility generates thousands of metric tons of manure annually.
Avoided Methane Emissions: Roughly 8,000 to 18,000 per year, depending on baseline storage practices, dry matter content, and moisture management.
Voluntary Carbon Market (VCM) Credit Price: Agricultural methane avoidance credits registered under high-integrity standards (like Gold Standard or Verra) typically trade between $5.00 and $15.00 per credit .
Gross Credit Revenue Potential: At 12,000 credits/year priced at $10/credit, gross market value equals roughly $120,000 USD/year.
The Catch: Gross Revenue vs. Net Farm Cash
Gross carbon market value does not equal net cash paid to the farmer. The true net cash return depends on several structural factors:
Aggregator Revenue Share: Developing a Gold Standard carbon project requires specialized methodology, software, and registration fees. Most livestock farms partner with a project developer or aggregator who covers upfront costs in exchange for 30% to 50% of the issued carbon revenue.
Audit & Issuance Overhead: Annual verification requires third-party environmental auditors to physically measure manure volumes, moisture levels, and energy usage.
Payout Timing: Credits are typically issued and paid out retroactively 12 to 24 months after processing, following audit verification.
Estimated Net Cash Outcome: A large 750,000-bird layer farm receiving $120,000 in gross credits can expect net cash revenue of roughly $50,000 to $85,000 USD annually from carbon credits alone.
4. The Real Winner: Dual Revenue Streams
While carbon credits offer a welcome financial bonus, carbon income is best viewed as additional cash flow rather than the core business case. The main revenue driver remains the physical compost itself.
Revenue Stream | Source | Estimated Annual Value | Impact |
Processed Organic Fertilizer | Direct bagged or bulk sales of sanitized compost (€50–€150+/ton) | High (€250,000 – €750,000+) | Primary payoff; fast payback on machinery investment. |
Carbon Credits (Methane Avoidance) | Voluntary carbon markets (e.g., Gold Standard / Verra) | Moderate ($35,000 – $85,000+) | Recurring upside; offsets machinery operational costs. |
Operational Savings | Lower waste transport fees, eliminated environmental fines | Variable | Improves overall farm EBITDA and compliance. |
Key Takeaways from the Field
Visiting DN AGRAR Group and the poultry operation demonstrated that circular agricultural technology is moving past the experimental phase. Equipment like the Kohshin KNL6000 turns an operational liability—manure—into two distinct income streams: fertilizer sales and carbon credits.
Carbon credits may not replace primary farm income, but they effectively subsidize technology upgrades. For modern agribusinesses operating at scale, pairing aerobic composting with carbon markets offers a clear path toward both profitability and environmental sustainability.
Kohshin Engineering Co., Ltd. is a Japanese agricultural machinery manufacturer founded in 1972 and headquartered in Ama City, Aichi Prefecture. Led by CEO Kazunori Sumiya, the company specializes in sustainable farming technology, specifically aerobic composting machines that convert livestock and poultry manure into high-quality organic fertilizer.
Their product lineup includes advanced fermentation systems, fertilizer blenders, and automated poultry cage-cleaning robots like the Venus series. Operating across more than 40 countries, Kohshin integrates smart IT monitoring systems to help agricultural operations reduce waste, lower labor costs, and turn environmental byproducts into valuable resources
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