Anaerobic

Anaerobic conditions under wastewater transport and treatment imply that neither nitrate, sulphate nor oxygen are present for the decomposition of organic matter.

Under anaerobic conditions oxygen is not present. This is in contrast to ‘aerobic’.

Anaerobic conditions under wastewater transport and treatment imply that neither nitrate, sulphate nor oxygen (NO3-, SO42-, O2) are present for the decomposition of organic matter. Organic matter is instead decomposed by anaerobic digestion to yield smaller organic compounds.

Stages of anaerobic digestion
1 Carbohydrates
2 Fats
3 Proteins
4 Sugars
5 Fatty acids
6 Amino acids
7 Carbonic acids and alcohols
8 Hydrogen, carbon dioxide, ammonia
9 Hydrogen, acetic acid, carbon dioxide
10 Methane, carbon dioxide
11 Hydrolysis
12 Acidogenesis
13 Acetogenesis
14 Methanogenesis





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