Kopi Luwak Kopi Luwak Kopi luwak (), or civet coffee, is coffee that includes partially digested coffee cherries, eaten and defecated by the Asian palm civet ("Paradoxurus hermaphroditus"). Fermentation occurs as the cherries pass through a civet's intestines, and after being defecated with other fecal matter, they are collected. Producers of the coffee beans argue that the process may improve coffee through two mechanisms, selection – civets choosing to eat only certain cherries – and digestion – biological or chemical mechanisms in the animal's digestive tract altering the composition of the coffee cherries. The traditional method of collecting feces from wild civets
Metabolic waste excreta. Some mammals including humans excrete uric acid as a component of their urine but it is only a small amount. These compounds form during the catabolism of carbohydrates and lipids in condensation reactions, and in some other metabolic reactions of the amino acids. Oxygen is produced by plants and some bacteria in photosynthesis, while CO is a waste product of all animals and plants. Nitrogen gases are produced by denitrifying bacteria and as a waste product, and bacteria for decaying yield ammonia, as do most invertebrates and vertebrates. Water is the only liquid waste from animals and photosynthesizing plants.