This paper reviews the literature on the potential of detoxification, transformation and mineralization of nitroaromatic and azo compounds under anaerobic conditions.
Since the SS in the wastewater is very high, the anaerobic treatment could be divided into fermentation with decantation or without decantation according to SS treatment.
On the other hand, the biochemical process to get energy from manure breaks down the waste through anaerobic bacteria in a digester; an airtight tank or covered lagoon.