Can You Compost Meat? (Is It Even Possible?)

  • By: Sam Richards
  • Date: August 2, 2023
  • Time to read: 10 min.

Composting is the transformative process of converting organic material, commonly referred to as “waste”, into nutrient-dense soil, also known as humus. An art as old as agriculture itself, it has allowed societies to return nutrients back to the soil, closing the loop of life. This environmental savior reduces landfill contributions and gives a second life to kitchen scraps, garden waste, and other organic materials.

The green bins in your backyard or balcony might regularly see an influx of banana peels, coffee grounds, eggshells, and wilted flowers – all common composting fodder. However, a topic that remains the center of debate is the composting of meat. The question of whether it is safe, efficient, and practical to compost meat, be it scraps or bones, is a critical one. The answer holds significant implications for our household waste reduction efforts, gardening practices, and overall environmental impact.

This comprehensive guide aims to dive into the complex world of composting meat. We will explore the scientific processes involved, address the controversy surrounding it, and present potential problems and solutions. Further, we will discuss the appropriate techniques for composting meat and delve into its environmental ramifications. The goal is to provide an exhaustive understanding of the topic, allowing readers to make informed and effective composting decisions.

The Debate about Composting Meat

Composting is a universally accepted practice, but when it comes to composting meat, consensus fractures into a whirlwind of differing opinions and arguments. The world of composting has traditionally leaned towards the exclusion of meat, with the bulk of advice recommending a plant-based compost pile. This notion has stemmed from a variety of concerns related to health, efficiency, and the management of the composting process.

On one side of the debate, critics argue that meat composting poses significant problems that outweigh its potential benefits. The most common concern centers around the attraction of unwanted pests such as rats, raccoons, and insects, as the smell of decomposing meat is a veritable buffet invitation to these creatures. Additionally, health risks are another deterrent, with worries about the growth and spread of pathogens from rotting meat, particularly if the compost is intended for vegetable gardening.

But the debate doesn’t stop there. The other side insists that meat, like any organic material, has its rightful place in the compost heap. They argue that meat, rich in nitrogen, is a valuable addition that can enhance the nutrient content of the compost. Advocates suggest that, with the right composting techniques, the potential pitfalls associated with meat composting can be mitigated or even completely avoided. They point out that proper heat management can nullify pathogen risks, and well-structured compost systems can keep pests at bay.

This debate, like any, is grounded in nuances that need exploration and understanding. By examining the science, techniques, and implications of composting meat, we can navigate this multifaceted argument more effectively and determine the best practices for individual circumstances.

The Science Behind Composting Meat

To understand how meat fits into the composting equation, it’s crucial to first delve into the science of composting. At its core, composting is a natural, biological process where organic material is broken down by a symphony of microorganisms, including bacteria, fungi, and insects, into a rich soil-like substance.

Decomposition is a complex interplay of carbon and nitrogen elements. “Green” materials like kitchen scraps and grass clippings provide nitrogen, serving as a protein source for the microorganisms. On the other hand, “brown” materials, such as dead leaves and paper, supply carbon, acting as an energy source. This carbon-to-nitrogen (C:N) ratio plays a vital role in the speed and efficiency of composting. Ideally, maintaining a C:N ratio of around 30:1 provides a balanced diet for the decomposers and accelerates the composting process.

Now, meat, being protein-rich, falls under the ‘green’ or nitrogenous category. However, the high nitrogen content of meat can disrupt the delicate C:N balance if not offset by enough ‘brown’ materials. Furthermore, the complex proteins and fats within meat can be more challenging for microorganisms to break down compared to plant material, potentially slowing the decomposition process.

The decomposition of meat, like all organic matter, generates heat. As such, the compost pile’s core temperature can rise significantly during the process, which is a double-edged sword. On one side, heat aids in breaking down the meat faster and can kill potential pathogens. On the other hand, if the pile gets too hot, it may kill beneficial composting organisms, causing the composting process to stall.

Therefore, the science behind composting meat underscores the need for careful management of the compost pile. Understanding these fundamental principles can help composters effectively integrate meat into their composting practices.

Potential Problems of Composting Meat

Composting meat, despite its potential benefits, poses several challenges that have made many gardeners wary. The problems stem from the nature of meat itself and the complex dynamics of the decomposition process.

  1. Attracting Pests: The smell of decomposing meat is a potent attractant for a host of pests. Rodents, raccoons, and flies are just a few examples of unwanted guests that may be drawn to your compost pile. This not only disrupts the composting process but also creates a nuisance and potential health hazards.
  2. Pathogens and Disease Risk: Unlike plant-based waste, meat carries a higher risk of harmful bacteria and pathogens, such as E. coli and Salmonella. If the compost pile does not reach high enough temperatures to kill these pathogens (around 60 degrees Celsius or 140 degrees Fahrenheit), they could persist in the finished compost and potentially contaminate growing plants, especially if used in vegetable gardens.
  3. Bad Odors: The process of meat decomposition can produce some rather unpleasant smells, more so than plant material. These odors can become a significant concern, especially in urban or suburban areas with close neighbors.
  4. Slow Decomposition: Meat’s dense structure and high protein and fat content make it more challenging to decompose compared to most plant materials. This means that meat can significantly slow down the overall composting process if not managed correctly.

Understanding these potential problems is the first step in developing strategies to mitigate them. It’s important to remember that while these challenges can make composting meat more complex, they don’t make it impossible. With the right knowledge and techniques, each of these issues can be managed effectively.

Proper Techniques for Composting Meat

Successfully composting meat requires precise strategies and techniques. With the right approach, the challenges associated with meat composting can be overcome, allowing you to reap the benefits of this nutrient-rich addition to your compost pile.

  1. Bokashi Composting: Originating in Japan, Bokashi composting is a two-stage process that begins with an anaerobic fermentation stage. In this method, you add your waste, including meat, to a Bokashi bin and sprinkle it with a special bran that’s been inoculated with beneficial microorganisms. These microorganisms, in a no-oxygen environment, break down the waste, including meat, rapidly and without foul odors or pests. The pre-compost material can then be added to a regular compost pile or buried directly in the garden soil.
  2. Hot Composting: Also known as thermophilic composting, hot composting involves creating conditions that favor heat-loving microorganisms. These microbes generate significant heat, which in turn speeds up the decomposition process and kills potential pathogens. To compost meat using this method, it’s crucial to maintain a good balance of ‘green’ and ‘brown’ materials and ensure your compost pile has sufficient size to generate and retain heat.
  3. Trench Composting: This technique involves digging a deep hole or trench in the ground and burying your meat scraps. Over time, the meat decomposes naturally, well away from potential pests. The key to trench composting meat is to bury it deeply enough (at least a foot deep) and to avoid placing it near plant roots.
  4. Compost Tumblers/Bins: Compost tumblers or bins are enclosed systems that offer better control over the composting process. These containers help maintain heat and moisture levels and also keep pests at bay. When composting meat in a tumbler or bin, it’s crucial to turn or tumble the contents regularly to ensure even heating and aeration.
  5. Balancing Meat with Carbon-rich Materials: Whenever you add meat to your compost pile, balance it out with plenty of ‘brown’ or carbon-rich materials like straw, leaves, or shredded paper. This practice maintains the C:N ratio, mitigates odors, and aids the decomposition process.

Remember, regardless of the technique you choose, the golden rule of composting meat is to monitor your compost pile closely. Regular turning, appropriate moisture levels, and a keen eye for any problems will help ensure successful composting.

The Environmental Impact of Composting Meat

The environmental ramifications of composting meat are multifaceted and substantial, playing a significant role in waste management, greenhouse gas reduction, and soil health.

  1. Waste Reduction: Food waste is a considerable issue globally. Composting meat scraps and bones instead of throwing them in the trash reduces the volume of waste ending up in our landfills. Given that meat products are often heavier and bulkier than plant-based scraps, their diversion from the waste stream can be particularly impactful.
  2. Greenhouse Gas Mitigation: When meat and other organic materials decompose in landfills, they do so anaerobically, or without oxygen. This process leads to the production of methane, a potent greenhouse gas that contributes to global warming. Composting, on the other hand, is an aerobic process, resulting primarily in carbon dioxide, a significantly less potent greenhouse gas.
  3. Soil Health and Nutrient Cycling: Composted meat, like all compost, returns valuable nutrients to the soil, enhancing its fertility and structure. Nutrients in meat, such as nitrogen and phosphorus, are important for plant growth. By composting meat, these nutrients are recycled back into the soil, promoting a healthier, more vibrant garden or ecosystem.
  4. Reducing Dependence on Synthetic Fertilizers: By enriching the soil with organic matter and nutrients, composting helps reduce reliance on synthetic fertilizers. This shift can contribute to fewer water pollution incidents and the preservation of natural ecosystems.

While composting meat does present some challenges, the environmental benefits that it can offer make it an appealing practice for those committed to a sustainable lifestyle. It’s a reminder that even our smallest daily habits can have a significant cumulative effect on the health of our planet.

Guidelines and Regulations on Composting Meat

While home composting is generally encouraged as a sustainable practice, there are specific guidelines and regulations related to composting meat that vary based on location. Awareness and adherence to these regulations are important for maintaining public health and minimizing potential nuisances.

  1. Residential Composting Regulations: Many localities do not prohibit the composting of meat in residential settings but often recommend against it due to concerns about pests, odors, and disease-causing pathogens. If you choose to compost meat at home, ensure that you follow best practices to mitigate these risks.
  2. Commercial Composting Regulations: For large-scale or commercial composters, the regulations can be more stringent. Many regions require commercial composting operations to reach specific temperatures for a particular duration to ensure that any potential pathogens are destroyed. This is especially important when composting meat, as it poses a higher risk of pathogen contamination.
  3. Community Composting Programs: Some municipalities offer community composting programs which may accept meat and other animal products. These programs typically use controlled, high-heat composting processes to safely compost materials that can be problematic in home compost systems. Check with your local waste management facility or extension service to learn more about the options in your area.
  4. Special Cases – Diseased Animals and Roadkill: The composting of meat from diseased animals or roadkill is typically subject to additional regulations due to the risk of spreading disease. In some cases, it may be prohibited altogether. It’s always a good idea to check with local health departments or agricultural extension services before attempting to compost these types of materials.

Remember, while understanding and following these regulations is vital, successful meat composting also depends largely on proper techniques and careful management of the composting process. Always aim for a balanced compost mix, maintain a proper temperature range, and ensure sufficient aeration to create a hospitable environment for beneficial composting organisms.


Composting meat is a topic that straddles the line between environmentally-conscious practice and potential risk. While it can undoubtedly contribute to a reduction in food waste and improved soil health, it simultaneously invites complications like attracting pests, the potential for disease transmission, and the creation of unpleasant odors.

This guide has traversed the complex terrain of meat composting, dissecting the science, potential problems, techniques, and guidelines associated with the practice. The answer to whether or not to compost meat isn’t a simple yes or no, but rather, it depends on the circumstances. If you live in a densely populated urban setting with little space, it might be more prudent to forego meat composting or use an indoor method like Bokashi. Conversely, for those with more space and resources, hot composting or trench composting could provide a feasible way to integrate meat scraps into their composting routine.

Ultimately, composting meat is a decision that requires understanding, effort and a commitment to managing your compost pile diligently. In an era increasingly defined by sustainability and the push towards circular economy models, being informed and open to possibilities, including composting meat, could be the key to unlocking even greater environmental benefits.

As with most things in life, successful composting is a journey and not just a destination. It’s about learning, adapting, and making the best choices for our gardens, our communities, and our planet. So, whether you choose to compost meat or not, may your composting endeavors always bear fruitful results.

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