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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Japan has demonstrated one route from livestock manure to vehicle energy: manure is digested into biogas, then processed into hydrogen for fuel-cell vehicles and forklifts. That is not the same as putting dung or raw biogas into a car. A separate tractor-fuel effort appears in Hokkaido government planning materials, but the cited record does not establish a commercial tractor rollout.
How manure becomes vehicle energy
Livestock manure is feedstock, not a fuel poured directly into a vehicle. In anaerobic digestion, microorganisms break down organic material and produce biogas, which is largely methane and carbon dioxide. The next processing step depends on the intended fuel: Shikaoi’s vehicle demonstration made hydrogen from purified biogas, while a separate Hokkaido project pursued liquefied biomethane.
These routes produce different fuels and serve different equipment. Hydrogen is used in fuel cells to generate electricity; biomethane is methane processed into a liquid form. Neither should be described as a car running on untreated cow dung.
Shikaoi demonstrated manure-derived hydrogen for vehicles
Japan’s Ministry of the Environment describes the Shikaoi Hydrogen Farm in Hokkaido as an integrated supply chain: livestock manure was fermented to make biogas, the gas was purified, and hydrogen was produced, compressed, stored and supplied for use. The ministry’s English overview gives the project period as FY2015–FY2021. It records fuel-cell vehicles, fuel-cell forklifts and stationary fuel cells among the project’s uses. The ministry’s 2017 announcement called it Japan’s first integrated demonstration of hydrogen production, storage, transport and use from livestock manure; its English project overview describes trial uses that changed over time, including simplified vehicle fueling activity and limited-period forklift supply.
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This was a demonstration, not evidence of a general retail fuel network or widespread vehicle adoption. The ministry also notes that hydrogen produces no CO2 at the point of use in a fuel cell. That statement concerns vehicle use, not the full lifecycle emissions of producing and delivering manure-derived hydrogen.
Tractor fuel is a listed planning effort, not a confirmed rollout
Hokkaido’s regional energy program lists FY2021 project materials under the phrase “家畜ふん尿のバイオガストラクター燃料への活用,” meaning use of livestock-manure biogas as tractor fuel. The Hokkaido Government program page establishes that tractor fuel was a planning topic. It does not confirm that a commercial tractor operated on the fuel, that a compatible tractor was sold, or that a consumer conversion kit is available.
A separate Hokkaido project makes liquefied biomethane
Air Water announced a demonstration to collect cattle-manure biogas, process its methane centrally into liquefied biomethane (LBM), and supply the fuel to dairies as a local substitute for liquefied natural gas (LNG). This is a methane route, separate from Shikaoi’s hydrogen supply chain. Air Water also identified trucks and boilers as possible future LBM uses; those were prospective applications, not the initial dairy-substitution demonstration. Air Water’s announcement describes the planned collection, transport and processing model.
Digestate remains part of the system
Making biogas also leaves digestate, the material remaining after methane fermentation. A Hokkaido case reported by the Ministry of Agriculture, Forestry and Fisheries generated 1.3 million kWh of electricity per year. The plant produced 16,800 tonnes of digestate annually; it separated the liquid fraction for use as grassland fertilizer and reused the solids as livestock bedding. Those figures describe that reported facility, not a national average. The same government page discusses joint research turning biogas into methanol and formic acid—material products, not vehicle fuels. The regional agriculture office’s 2022 account details those uses.
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What the projects do—and do not—show
| Pathway | Fuel or output | Documented use or status | Evidence maturity |
|---|---|---|---|
| Shikaoi manure digestion, biogas purification and hydrogen production | Hydrogen | Fuel-cell vehicles, forklifts and stationary fuel cells | Ministry-recorded demonstration, FY2015–FY2021 |
| Hokkaido manure-biogas methane processing | Liquefied biomethane (LBM) | Demonstration aimed at substituting for LNG at dairies; trucks and boilers described as possible future uses | Company-announced demonstration |
| Hokkaido livestock-manure tractor-fuel work | Biogas | Use as tractor fuel appears in FY2021 planning materials | Government-listed plan; commercial deployment is not established |
The examples show practical routes for recovering energy and useful materials from manure, but they do not establish that the fuels are cheaper, carbon neutral over their full lifecycle, or widely available to drivers and farmers. The sources describe projects and selected outcomes, not comparable lifecycle-emissions or cost analyses. They also should not be confused with biodiesel: Hokkaido’s separate BDF program concerns fuel made from plant and waste oils, not manure-derived gas. The Tokachi bureau’s BDF page identifies that distinct feedstock route.
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