Egg Washing Equipment: A Complete Guide

Egg washing is a crucial step in commercial and backyard poultry operations alike, removing dirt, debris, and pathogens from the shell surface to ensure food safety and improve shelf life. This guide covers the essential equipment needed for efficient egg washing, from simple manual setups to automated systems, and explains how to use them properly. Whether you are a small-scale farmer or a homesteader, understanding the right tools and techniques will help you produce clean, safe eggs.

Ingredients

1 egg washing machine (manual or automatic, e.g., 100-egg capacity)
1 wash tank or basin (food-grade plastic or stainless steel)
1 egg washer brush set (nylon or soft bristle, 6-8 brushes)
1 egg conveyor or drying rack (optional, for larger operations)
1 sanitizer solution (e.g., chlorine-based, diluted to 50-100 ppm, or commercial egg wash sanitizer)
1 clean water supply (potable, at least 90°F / 32°C)
1 egg carton or flat for storage
1 thermometer (to check water temperature)
1 pair of gloves (optional, for hygiene)

Instructions

Set up your washing station. Place the wash tank on a sturdy, level surface near a water source. If using an automatic egg washing machine, assemble it according to the manufacturer’s instructions, ensuring all brushes and rollers are in place.
Prepare the wash water. Fill the tank with warm water at a temperature between 90°F and 120°F (32°C to 49°C). The water must be warmer than the eggs to prevent the egg contents from shrinking and pulling bacteria through the shell pores. Add the sanitizer according to the product label, typically 1-2 tablespoons per gallon (15-30 ml per 4 liters), to achieve a concentration of 50-100 ppm chlorine.
Pre-clean visibly dirty eggs. If eggs have heavy manure or debris, gently wipe them with a dry cloth or fine sandpaper before washing. Do not use abrasive materials that could damage the bloom (the protective coating on the shell).
Wash the eggs. For manual washing, dip a brush into the sanitized water and scrub each egg individually, using a gentle circular motion. For automatic machines, place eggs on the conveyor or in the loading tray; the machine will rotate them through the brushes and water. Ensure each egg is submerged or sprayed for at least 30 seconds.
Rinse the eggs. After washing, rinse eggs with clean, warm water (at the same temperature or slightly warmer) to remove any residual sanitizer and loosened dirt. If using a machine, the rinse cycle is often built-in; for manual washing, use a separate container of clean water.
Dry the eggs. Place washed eggs on a drying rack or clean towel, with the pointed end down, and allow them to air dry completely. Do not towel-dry, as this can recontaminate the shells. In a machine, the drying section uses warm air to speed up the process.
Store the eggs. Once dry, place eggs in clean cartons or flats, pointy end down, and refrigerate immediately. Use within 3-4 weeks for best quality.

Tips

Use the right water temperature: Always keep wash water warmer than the eggs (at least 20°F/11°C warmer). Cold water can cause the egg contents to contract, drawing bacteria into the shell.
Change water frequently: In manual setups, change the wash water every 20-30 eggs or when it becomes visibly dirty. In machines, follow the manufacturer’s recommendation for water replacement, usually every hour.
Handle eggs gently: Rough handling can cause micro-cracks that compromise safety. Use soft brushes and avoid dropping eggs.
Sanitize equipment after each use: Clean and disinfect the wash tank, brushes, and machine parts with a food-safe sanitizer to prevent bacterial buildup.

Serving Suggestions

Washed eggs are not served directly but are used as ingredients in countless dishes. Use them for breakfast scrambles, baking cakes, making mayonnaise, or any recipe that calls for fresh eggs. Properly washed eggs also make excellent gifts or farm-fresh produce for local markets.

Variations

Manual brush washing: For small batches, a simple brush and bucket setup is cost-effective and works well for 10-20 eggs at a time.
Automated roller washers: These machines use rotating brushes and a spray system, ideal for 100+ eggs per hour. They come in various sizes, from tabletop models to large industrial units.
Ultrasonic cleaners: Some advanced systems use ultrasonic waves to remove dirt without brushes, but they are more expensive and less common for egg washing.

Storage and Reheating

Washed eggs should be refrigerated immediately after drying. They will keep for 3-4 weeks in the refrigerator at 40°F (4°C) or below. Do not freeze raw eggs in their shells; if you need to freeze them, crack and beat them first, then store in an airtight container for up to 6 months. Since eggs are not cooked in this process, there is no reheating involved.

Frequently Asked Questions

Can I wash eggs with just water? Yes, but water alone is less effective at removing bacteria. Using a sanitizer (like chlorine or a commercial egg wash) is recommended, especially if eggs are soiled. If you use only water, ensure it is warm and change it frequently.

Should I wash eggs right after collecting? Ideally, yes. Washing soon after collection prevents dirt from drying and hardening, making the process easier. However, if eggs are clean, you can skip washing altogether; the bloom protects them naturally.

Can I wash eggs with cold water? No. Cold water is not recommended because it can cause the egg contents to contract and pull bacteria through the shell. Always use warm water (90-120°F / 32-49°C).

Do I need to dry eggs after washing? Yes, drying is essential to prevent mold growth and recontamination. Air-drying on a rack is best; avoid using towels that may harbor bacteria.

How often should I change the wash water? Change water every 30 minutes or after washing about 50 eggs in a manual setup. For machines, follow the manufacturer’s guidelines, but a good rule is to replace water when it becomes cloudy or dirty.

Is it safe to eat eggs that were washed? Yes, if washed properly with warm, sanitized water and dried completely. Refrigerate them promptly and use within 3-4 weeks. Always cook eggs until the yolk and white are firm to ensure safety.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).