Influence of inorganic salt on aerobic biodegradability of dyestuffs

In this paper, the influence of inorganic salt on aerobic biodegradability of dyestuffs was studied by means of semi continuous activated sludge method. It was found that: biodegradability of dyestuffs would decrease with the increase of the concentration of NaCl; however, biodegradability in the condition of NaCl=30 g/L was better than that in the condition of NaCl=15 g/L; in the three NaCl conditions, biodegradability of tested dyestuffs followed the following order: NaCl=0 g/L > NaCl=30 g/L>NaCl=15 g/L.