Ecological and nutritional structure of halophilic bacteria

Halophilic bacteria are Gram-negative bacteria, most of which are good at gasifying and heterotrophic, and can use a wide range of carbon sources, which are suitable for alkalescent environment (pH 9-10); the population has a very high growth rate, with an age cycle of about 4 h; most of the bacteria are round, with a diameter of 2-4 mm; the appearance is red, purple or light brown; no movement or clumping flagella movement; the moderate and extreme of these heterotrophic and autotrophic types The characteristics of halophilic bacteria are very suitable for the treatment of salty organic industrial wastewater.

The growth of halophilic bacteria needs complex nutritional structure. Some bacteria can grow in the medium of glucose, ammonia and inorganic salt, but most halophilic bacteria need growth factors such as amino acids or vitamins. In the laboratory, yeast extract and protein hydrolysates can be used to provide these growth factors. The growth of halophilic bacteria is more complicated with the increase of salt concentration. In addition, 80 μ g / L of iron and 48 mg / L of magnesium are essential nutrients for the growth of halophilic bacteria.