Solid-Liquid Separation & Bedding Recovery Category Guide

What Are Manure Separators & Processors?

Manure separators and processors are equipment systems that divide or treat dairy manure into different components for various uses—separated solids for bedding, liquid for fertigation, composted material for sale, or digestate from biogas systems. Processing adds value and creates management flexibility.

Why Manure Processing Matters

Raw manure is a valuable fertilizer but has handling limitations. Separation creates materials suited to different uses—stackable solids, pumpable liquids, or stable compost. Processing can turn a waste management burden into economic opportunity.

Key Benefits

• Bedding production: Separated solids provide low-cost bedding
• Handling flexibility: Different fractions suit different applications
• Nutrient management: Concentrate or dilute nutrients as needed
• Storage optimization: Reduce liquid storage requirements
• Revenue potential: Sell compost or other processed products

Separation Technologies

Screw Press

Mechanical compression forces liquid through screens, retaining solids. Most common separator type. Produces 25-35% solids material.

Roller Press

Similar to screw press but uses rollers. Different flow characteristics.

Screens

Static or vibrating screens separate by particle size. Simple but less efficient than presses.

Centrifuges

High-speed spinning separates by density. More expensive but produces drier solids.

Processing Options

Composting

Aerobic decomposition stabilizes material for use or sale. Requires space and management.

Digestion

Anaerobic digesters produce biogas for energy and digestate for fertilizer.

Drying

Reduce moisture for easier handling and transport. Energy-intensive.

Do You Need Manure Processing?

Consider processing if:

• Bedding costs are significant
• Liquid storage is limiting
• Nutrient concentration creates application challenges
• Revenue from processed products is attractive
• Expansion requires better manure management

Cost Considerations

Screw press separators cost $30,000-150,000+ depending on capacity. Operating costs include maintenance, repairs, and energy. Bedding value of $50-100/cow/year can offset costs. Evaluate carefully—separation isn't always economical for smaller operations.