Wastewater treatment system of alcohol factory

Wastewater of alcohol factories and other factories that use molasses as primary substance, because of high organic load, high amount of BOD (about 50000) and COD (about 100000), colored sewage and existence of toxic compounds like phenol, are not able to dispose directly and cause a major environmental concern. Chemical-physical methods such as surface absorption, membrane processes, ion exchange and chemical oxidation are not economical for treatment of these types of wastewater. PGA biofiltration, using a combination system physical, chemical and biological methods based on biofilter is capable of purifying of sewage of leather industry up to the standards of the Environmental Protection Organization and can be used again.