Aromatic acids are commodity chemicals, principally in the food and plastic industries, they are used in some cases in the food industry as food preservatives, and in other cases, as the raw materials for plastic envelopes and films. The production of these compounds is widely distributed around the globe. The net production of all of the aromatic acids is more than 50 million tons, therefore a
... [Show full abstract] great amount of waste acids are released into the environment. This chapter deals with the biodegradation of these kind of compounds in wastewater streams either by aerobic or anaerobic processes.