waste management

Garbage dump

Waste is unwanted materials and objects that people have thrown away. It is often also called trash, garbage, rubbish, or junk.

  • It can be solid, liquid, or gas, or it can be waste heat.
  • Garbage is the waste we produce daily in our homes, including old or unwanted food, chemical substances, paper, broken furniture, used containers, and other things.
  • When waste is a liquid or gas, it can be called an emission. This is usually pollution (hurts plants and animals).

Biosolids, waste treatment, feces, manure, poo

emission – waste that is a liquid or gas

pollution – hurts plants and animals

Current estimates – biosolids produced worldwide per year

  • 400 million tons. People
  • 14 billion tons. Livestock. Mostly cows. Pigs. Chickens.

Problems, opportunities

  • Nitrogen. Fertilizer. Phosphorous. Energy. Natural systems.
  • Pathogens. Bacteria. Parasites. Livestock.
  • energy recovery

Roman flush toilets.

Fish food.
Biodigestors.

Origin of feces. – Quirks and quarks podcast.

Ecosystems.

Waste management

Urban waste – humanure

Agricultural

  • livestock – cows, pigs, chickens
  • Fish poo

That’s engineering

  • emission – waste that is a liquid or gas
  • pollution – hurts plants and animals

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