A comparative study of the ability of the fungus Aspergillus niger on two alternative media, wheat bran and rice husk.

Citric acid is one of the important organic acids in fields industry, agriculture, medicine, etc., and it can be obtained many ways, best which biological methods using microorganisms. The current study aimed to prepare two cheap environmentally friendly culture media for purpose producing citric from Aspergillus niger. media, rice husks other Wheat bran, where a comparison was made between them regarding more efficient supporting fungus A. niger compared standard medium, temperature pH production were also assessed.
 Eight isolates obtained, all produced varying degrees. No.1 highest terms 3.1 gm/l, followed by isolate No. 2 with an amount 2.5 g/l. It observed that increased increase biomass fungus.
 showed variable results niger, wheat bran medium result, resulting concentration 5.1 4.4 g/l husks.
 25°C, as gave 3.4 g/l, while 6 3 grams per liter.the there no significant differences regard sugars adopted this experiment, similar well ammonium nitrate among sources used, quantity 4 gm/l .