What Are The Ultimate Standards for Recycled Manure Solids (RMS) Bedding?

Struggling with rising bedding costs? You're not alone, but using poor-quality alternatives can cause more problems. Recycled Manure Solids (RMS)¹ offer a cost-saving solution if you follow strict standards.

As a professional B2B supplier, I've seen that the best RMS bedding requires precise control over four key areas: moisture content², microbiological safety³, fermentation process⁴, and physical fiber structure. Getting these right prevents mastitis and hoof disease, turning waste into a valuable asset for your farm.

For years, I've worked with farms making the switch to RMS bedding. It’s a fantastic way to turn waste into a resource, saving a fortune on sand, sawdust, or expensive rubber mats. I remember visiting a farm that cut its bedding costs by over 60% in the first year. However, I’ve also seen farms where a poorly managed RMS system led to a spike in mastitis and hoof problems, completely wiping out any savings. The difference between success and failure always comes down to quality control. You can’t just pile up manure and hope for the best. You need a system and you need to stick to the standards. Let's walk through the four non-negotiable standards that will make or break your RMS bedding program.

How Crucial is Moisture Control in RMS Bedding?

You have bedding, but it's damp and compacted, creating a perfect breeding ground for bacteria. This isn't saving money; it's just trading bedding costs for vet bills and lost production.

The ideal moisture content² for RMS bedding is 45% or less. This level is the sweet spot that prevents bacterial growth and compaction. Too dry, and you get dust; too wet, and you get disease. Effective dewatering and barn ventilation are absolutely essential.

In my experience, moisture is the first and most frequent point of failure. The goal is to create a dry, comfortable bed for the cows. If the bedding moisture is above 45%, it gets heavy, clumps together, and sticks to the cows. This wet environment is a paradise for bacteria and mycoplasma, leading directly to increased cases of mastitis and hoof infections. On the other hand, if you over-dry it, the bedding becomes too dusty. This dust irritates the cows' respiratory systems, causing coughing and other health issues.

This is why a two-step process is critical. First, you need an efficient solid-liquid separator to press the initial water out. Second, you must maintain a dry environment in the barn itself. Proper air circulation from high-quality barn fans is not a luxury; it's a necessity to wick away any remaining moisture and keep the bedding performing at its best.

What are the Microbiological Safety Standards for RMS Bedding?

The biggest threats in your bedding are completely invisible. Harmful bacteria can multiply silently, leading to a sudden and costly mastitis outbreak across your herd. You can't afford to guess if your bedding is safe.

For safe RMS bedding, lab tests must show fecal coliforms at or below 100 MPN per gram and mold below 4,000 NCFU per gram. Critically, there is zero tolerance for pathogens like Staphylococcus aureus and Salmonella; they must not be detectable.

You can’t manage what you don’t measure. These microbiological numbers are your ultimate report card for the composting process. Fecal coliforms are an indicator of how well you've eliminated harmful bacteria from the manure. Keeping the count low is essential for udder health. Mold is another concern; high levels can cause respiratory problems and other health issues, not to mention making the bedding unappealing for the cows.

The most important rule, however, is the complete absence of Staphylococcus aureus and Salmonella. These are not just indicator bacteria; they are dangerous pathogens that can cause severe disease and economic losses. A "not detected" result is the only acceptable outcome. Achieving these strict standards isn't a matter of luck. It's the direct result of a well-managed fermentation process⁴, which is our next critical point. Regularly sending samples to a lab for testing provides the data you need to ensure your bedding is helping, not hurting, your herd.

How Do You Properly Ferment Manure for Safe Bedding?

Simply piling up manure and waiting is not composting; it's creating a potential disease reservoir. Without controlling temperature and time, you are failing to kill pathogens and putting your entire herd at risk.

The core of safe RMS production is the fermentation (composting) phase. You must maintain a temperature of 55°C (131°F) or higher for 5 to 7 consecutive days. This heat step is what kills the harmful bacteria and pathogens, making the bedding safe.

This is the step that sanitizes the material. The heat generated by the microbial activity during composting is your sterilization tool. To be effective, the pile must reach and hold that critical temperature of 55°C for at least five full days, and I always recommend aiming for seven to be safe. This ensures a complete kill of the pathogens we just discussed.

The total time for the entire fermentation process⁴ varies with the seasons. In the summer, you can typically produce a finished batch in 10 to 15 days. In the colder winter months, the process will be slower, taking around 15 to 20 days. You need to monitor the pile's core temperature with a long-stem thermometer to verify you are meeting the standard. If your farm's setup or the climate makes it impossible to consistently achieve this time and temperature, then you must invest in a mechanical dryer to flash-heat the material and ensure it is properly sanitized before use. There are no shortcuts here.

Why Does the Fiber Structure of RMS Bedding Matter?

Have you ever created bedding that looks dry, but it quickly becomes hard and compacted in the stalls? If cows refuse to lie on it, you've failed, no matter how clean it is. The physical texture is just as important as the biological safety.

Do not grind the manure solids too finely. A good fiber structure is essential for keeping the bedding fluffy, resilient, and absorbent. Fine particles compact easily, lose their cushioning effect, and reduce cow comfort, which directly hurts lying time and milk production.

After all the work of dewatering and composting, the last thing you want is to ruin the final product's physical properties. Think of the bedding like a sponge. Long fibers create air pockets that provide cushioning and help wick away moisture. When you process the manure too aggressively and grind these fibers down, the material becomes dense. It loses its springiness. When it gets wet, it turns into a material similar to clay, hard and uncomfortable.

Cows need to lie down for 12-14 hours a day to rest, ruminate, and produce milk. If the bedding is uncomfortable, they won't. This reduces blood flow to the udder and lowers milk yield. The key is to use equipment that preserves the fiber. This starts with clean collection using tools like manure scrapers to minimize contamination, and using a separator that presses, rather than pulverizes, the solids. The goal is a bedding material that is light, airy, and inviting for your cows.

Conclusion

Recycled Manure Solids can be a huge asset. By mastering the four pillars—moisture, microbes, fermentation, and fiber structure—you can create safe, comfortable, and cost-effective bedding for your herd.