Preservation of animal products Notes, Quizzes & Revision
π Revision Notes β’ π Quizzes β’ π Past Papers available in app
Animal Production β Preservation of Animal Products
Subtopic: Preservation of animal products
Subject: Agriculture β’ Age: 13 years (Kenyan context)
Preservation means keeping animal products (like milk, meat, eggs, fish, honey, hides) safe from germs and spoilage so people can eat them later. Good preservation keeps food healthy and reduces loss for farmers.
Common animal products
π₯ Milk β’ π Meat β’ π Fish β’ π₯ Eggs β’ π― Honey β’ π Hides & skins
Why preserve?
- Keep food safe to eat (prevent sickness).
- Sell products later when prices are better.
- Reduce waste for smallholder farmers in Kenya.
- Make new products (e.g., fermented milk, dried fish).
Simple preservation methods (what they do)
Cooling & Refrigeration βοΈ
- Keep milk, meat and eggs cold to slow germs.
- Small farmers use cool boxes with ice or milk cans cooled in flowing water. Solar fridges are used in remote Kenyan areas.
- Tip: Raw milk should be cooled as soon as possible (within 1β2 hours) after milking.
Freezing π§
- Keeps meat and fish for many weeks when frozen well.
- Farmers can sell frozen products to shops in towns.
Smoking & Drying π₯
- Fish and meat are dried or smoked to remove water so germs cannot grow.
- Solar driers (wood or metal boxes with clear tops) are used in Kenya to keep smoke away and dry food faster.
Salting & Curing π§
- Salt draws out water from meat and hides so bacteria cannot grow.
- Used where there is no electricity.
Pasteurization & Boiling β¨οΈ
- Heat milk to kill harmful germs, then cool quickly. This keeps milk safe for a few days in a fridge.
- Boiling milk is common in homes.
Fermentation π₯
- Good microbes turn milk into fermented milk (e.g., mursik in some Kenyan communities). Fermentation preserves milk and can add flavour.
- Fermented milk should be made with clean utensils and clean milk.
Canning & Sealing π₯«
- Meat and fish can be sealed in cans or jars and heated to kill germs. This keeps food for months without refrigeration.
Honey storage π―
- Keep honey in clean, dry, airtight containers. Do not refrigerate (it crystallizes). Store away from direct sun.
Hides & Skins curing π
- Salt and dry hides quickly after slaughter to avoid rotting. Proper curing keeps value for tanneries.
Signs of spoilage (donβt eat these)
- Bad or sour smell (milk, meat).
- Change in colour (green, grey or dark spots).
- Slime or sticky surface on meat/fish.
- Mould on cheese or milk products.
- Eggs with bad smell after cracking.
Good hygiene β simple rules
- Wash hands before handling food and after visiting animals.
- Use clean containers and clean water.
- Keep products covered to stop flies and dust.
- Sell through cooperatives or certified buyers β they check quality.
- Ask your local agricultural extension officer if unsure β they help farmers in Kenya.
- Milk at room temp: 1β2 hours. In fridge: 2β3 days (pasteurised).
- Eggs (refrigerated): 3β5 weeks. At room temp: fewer weeks.
- Fresh meat in fridge: 1β2 days. In freezer: several months.
- Dried/smoked fish: weeks to months if kept dry.
Note: These are general tips. Always check weather, cleanliness and storage conditions.
Class activity / practical ideas
- Make a small solar drier from a cardboard box and clear plastic to dry slices of fish or meat (supervised by teacher).
- Try fermenting a small amount of milk to see how it changes (use clean jar and spoon).
- Visit a local dairy cooperative or extension office to see how they handle and cool milk after milking.
Proper preservation keeps food safe, helps farmers earn more, and reduces waste. Follow simple hygiene and cooling steps β and ask local experts when needed.
Prepared for Kenyan learners β Agriculture: Animal Production