Add Fine Solids Separation

Overview

It is recommended to add fine solids separation to further extract manure solids from the liquid waste stream for effective manure management and optimizing overall farm operations. By separating fine solids, farms can increase efficiency, reduce labor costs, and minimize environmental impacts. Proper fine solids separation not only improves resource recovery by repurposing solids for bedding, compost, or soil amendments but also reduces nutrient runoff and debris in the manure, making it easier to handle. Additionally, this process enhances the quality of recycled water and reduces lagoon size and load, allowing for more strategic and efficient nutrient placement across fields.

References:

LWR Technology
Greener Day Solutions
TNZ Modular Manure Treatment

Environmental Impact

• Reduced GHG emissions
• Improved waste separation efficiency
• Enhanced air and water quality
• Improved nutrient utilization
• Reduced solids accumulation in waste storage ponds
• Wastewater reuse and recycling
• Reduced use of commercial fertilizers

Greenhouse Gas Reduction

Estimated Cost

Total Cost: $500,000

*Note: This is an estimated cost for an LWR system, exact cost source information is unavailable at this time.

Financial Considerations

Cost Savings: Removing fine solids enhances the application of liquid manure by minimizing the risk of clogging in waste transfer systems. Fine solids separation also optimizes the application of liquid manure nutrients, while the solids can serve as a nutrient-rich soil amendment or compost, reducing the need for commercial fertilizers and allowing for greater use of on-farm resources. Additionally, removing fine solids decreases maintenance costs associated with waste storage, such as dredging, and reduces the overall volume of manure that needs to be handled and stored. By eliminating debris, equipment wear and tear is minimized, which can reduce repair and replacement costs. The separated fine solids can also be repurposed as bedding, decreasing the need for purchasing and transporting additional bedding materials.
Additional Revenue: When not used on-farm, fine solids can be sold as compost, bedding, or soil amendments. In addition, fine solids have the potential to be used for feedstock in anaerobic digestion or biomass conversion.
Carbon Credit Potential: Solid-liquid separation serves as a prerequisite for many downstream manure treatments, such as cap and flare systems and nutrient recovery, which can generate carbon credits by reducing GHG emissions. Additionally, the separation of fine solids itself can qualify for carbon credits, as it directly mitigates emissions by reducing the volume of organic material in manure that decomposes anaerobically.

Timeline

Midterm

Dependency / Prerequisite

Prerequisites:

• If sand is used as bedding, it is essential to remove the sand from the manure before it enters the separation system. This step is crucial to prevent rapid wear and tear on the separation equipment, which can lead to increased maintenance costs and reduced efficiency. Proper sand removal helps extend the lifespan of the equipment and ensures smoother operation.
• Fine solids separation technologies should follow coarse solids separation to optimally utilize the system as it is intended.
• Ensure that there is sufficient storage capacity for both fine solid and liquid fractions resulting from the separation process. Proper storage is vital for the sustainable management of these materials, allowing for effective handling, treatment, and application.
• Waste separation facilities should be covered to protect them from freezing temperatures and adverse weather conditions. This precaution is necessary to prevent potential damage to the equipment, ensuring its longevity and effective operation.