Fermentation bedding bacteria are applied when the bed is laid, so that the bedding itself becomes an active aerobic surface rather than an inert mat. The inoculated culture uses the organic carbon in the bedding together with the nitrogen arriving in urine and faeces, keeping the bed structured and noticeably lower in odour until it is turned or refreshed.
This is written for producers and integrators running bedding-based housing, mostly in pig weaners, grow-out, farrowing and floor-raised poultry. The recurring question is not whether bedding culture works but why the same product gives a good result in one house and disappoints in another. Almost always the difference is in the bed.
Product referenced in this article
Bacteria Culture for Fermentation Bedding — application notes, specification table and document downloads for this range.
What fermentation bedding actually is
The material is ordinary — shavings, straw, sawdust, rice hull or a blend — but it is used differently. It is laid deep, kept moist rather than soaked, aerated by turning, and inoculated at laying so the bed starts with the right population present.
Bedding receives the same nitrogen load as the manure store, usually with more falling directly where animals lie. Left alone, that carbon-and-nitrogen load on a warm, damp surface goes anaerobic: the bed compacts, turns acidic and smells. Aerobic decomposition of the same material keeps producing heat and carbon dioxide instead of the reduced compounds behind the odour, and leaves a friable bed.
This is why depth and aeration matter more than dose. A culture applied to a thin, wet, compacted layer has no air and no room to work. If the bed is going anaerobic, the fix is management and material, not a stronger preparation.
How the process behaves in a working house
Temperature drives everything else. A bed in a stable warm state is one where microbial activity uses the arriving nitrogen quickly, which keeps odour low. Beds that never warm up are too dry, too cold, or too shallow to hold heat. Beds that sour are wet at the base, compacted, or turned too rarely.
Moisture is the control most often left unmanaged. Too dry and the population goes dormant, so nothing happens and the culture is judged ineffective. Too wet and air is displaced, the bed collapses into a mat, and product stays on the surface. A working bed feels like a wrung-out cloth: it holds together when squeezed and lets go without leaving a slick surface. Judging the top layer alone misleads.
Freshness follows from that. A fermenting bed keeps a loose, crumbly structure animals can root and lie in; one that has lost it has lost the conditions that made it work, so bed quality is a working indicator rather than a comfort question.
Application at preparation and at refresh
At preparation, the culture is mixed through the material as it is laid rather than applied to the finished surface. Mixing before laying distributes the organisms through the volume animals will disturb, so the population is present throughout the bed from the first day, not only in the top layer.
Distribution matters more than organism count. Undiluted concentrate poured onto one corner, or a dry powder that never wets, gives the same result as doing nothing. Mixing guidance is supplied per material.
Between refreshes, no application is needed in a properly managed bed. The population is self-sustaining, which is the practical advantage of this approach: intervention happens at laying, not weekly. What needs attention in between is turning, which redistributes moisture and oxygen and keeps the aerobic pathway available in a deeper bed.
At refresh, the top layer is removed and new material laid with culture mixed in as before. The refreshed material re-establishes in the days that follow, so a bedding change is the one moment in the cycle where capacity is temporarily reduced. When a house is emptied for a clean-out, treat the restart as laying a new bed.
Effect on bedding quality and on odour
Bedding quality improves for a straightforward reason: material decomposed aerobically is continually loosened and structured, where material that merely accumulates compacts under animal weight. That gives animals a dry, even lying surface, reduces wet faecal material against skin and keeps the bed usable longer between changes.
On odour, the mechanism is suppression rather than masking. The aerobic pathway does not generate the reduced nitrogen and anaerobic sulphur compounds behind the sharp smell associated with livestock housing, so lowering the load at source is what a bedding culture contributes. Be precise: it lowers the part of house odour that comes from the bed. Site odour also comes from the manure pit, dunging alley, stored slurry and exhaust air.
We are deliberately not claiming a removal rate, because the share of site odour originating in the bed varies far more between farms than any product attribute covers. Where the bed dominates, the improvement is the most visible change in the building; where the pit dominates, that surface needs separate treatment.
Where it fits among the other products
A bedding culture is one stage of a house, not a treatment for the building. Sites with bedding under the lying area and manure falling through slats, or composted on site, face several environments at once and each responds to a different product. Our bacteria culture for fermentation bedding is selected for the bed, where the working variables are moisture, aeration and depth.
Where the house also carries persistent odour from wet slatted surfaces, the dunging area and the pit lip, biological deodorizer for livestock farms addresses those wetted, organically loaded surfaces rather than the bedding volume. A wet structural point washed every cycle, such as a drinker line or an alley wall, is usually better served by an enzymatic deodorizer preparation, and is worth identifying first.
Where manure is composted on site, the livestock manure fermentation agent is a different application with different parameters, and specifying one for the other is a common cause of poor results. We are a National High-Tech Enterprise with 10+ granted patents and run our own fermentation pilot plant.
Limits, safety and what this cannot do
Fermentation bedding is a management system as much as a product. It does not correct a material that cannot hold moisture, a bed laid too shallow for the animal weight, a leaking drinker, or a house whose minimum ventilation was never set for its climate. It does not treat an uncovered slurry store at a boundary, nor replace the gas monitoring and rescue procedure that applies to manure pit entry.
On safety, the cultures we supply are non-pathogenic environmental strains, and preparation is a mixing step before the material goes down, not a spray applied to an occupied house. Even so, confirm species, strain composition and viability documentation for your system and request the current safety data sheet. We are ISO9001, ISO14001 and ISO45001 certified, with a batch certificate of analysis per batch.
How to judge whether the bed is working
You can assess this without instruments. Check four things on the same day each week, in the lying area rather than at the door: is the bed warm through the middle rather than only at the surface; is it friable when turned, or does it break into a dense mat; does it hold together when squeezed without leaving a slick surface; is the air at stock level neutral rather than sharp, right after turning as well as between turns.
Check a freshly turned section and an untouched one, because the difference tells you whether the population is present throughout the bed. Record the observations over a cycle that includes a refresh. If the bed is too wet, too thin or turned too rarely, the correction is in the regime, not the product.
What to send us for a specification
Send species and building type, number and stage of animals, the lying or floor area, whether the floor beneath is solid or slatted, the bedding material, the climate temperature range, how often the bed is turned and refreshed, and the quantity required.
We reply with the strain selection, application regime and dosage by location, and an indicative price.
Frequently asked questions
- What is fermentation bedding and how does it work?
- Fermentation bedding is a deep bed of dry organic material such as wood shavings, straw or sawdust that is kept in an aerated, moist state and inoculated with a microbial culture at laying. The inoculated microorganisms use the bedding's organic carbon together with the nitrogen in urine and faeces, so bedding becomes a living surface that is continuously restructured instead of compacting into an inert mat. Aeration keeps oxygen available for the aerobic pathway, which is what produces a stable, low-odour bed rather than a souring one.
- Is fermentation bedding safe for pigs, poultry and the people who work with them?
- The microorganisms used for bedding are non-pathogenic environmental strains selected for organic decomposition, and the process they drive is aerobic decomposition, the same biology used in manure composting. Bedding culture is applied by mixing into the material before it is laid, not as a spray into the air, so worker and animal exposure is limited to contact with treated bedding material. As with any biological preparation, confirm species, strain composition and viability documentation against your own house conditions before use, and request the current safety data sheet with your quotation.
- How much bedding is needed and how deep should the bed be?
- Both figures depend on the housing system and are quoted against your own data rather than published as fixed numbers. What determines them is the lying area per animal, whether the house has a slatted or solid floor beneath the bedding, the stock density and stage, the climate, and how often you intend to turn or refresh the bed. Note the animal numbers, the floor type and the covered area when you enquire and the dosage and depth are stated in the quotation against those figures.
- How often should the bed be turned or refreshed?
- It depends on the bed rather than on the calendar. Turning redistributes moisture and oxygen and is what keeps the surface aerobic; a bed that is never turned will compact, lose air and go anaerobic at the base whatever is applied to it. Refresh intervals follow stock density, climate and how the bed is managed, and are set in the application regime we propose for your house. We would rather specify this against your actual turnover than give a figure that suits a different system.
- Can bedding fermentation replace a deodorizer or a manure treatment?
- No. Fermentation bedding acts inside the bed, so it addresses odour coming off the lying surface. It does not treat the manure pit, the dunging alley, an uncovered slurry store or a wet slatted area, and it does not replace ventilation or a fixed minimum air exchange rate. Sites that need coverage of both stages address them with separate products suited to each environment, for example a deodorizer for the wet housing surfaces and a manure fermentation agent for on-site composting.
- What should I send you to receive a specification and quotation?
- Send species and building type, number and stage of animals, the lying area or floor area involved, whether the floor beneath the bedding is solid or slatted, the bedding material you plan to use, the climate temperature range, how often the bed is currently turned or refreshed, any odour or moisture problem you are trying to solve, and the quantity required. Our technical team replies with the strain selection, application regime and pricing.