PubAg

Main content area

Effect of heavy metals and phenol on bacterial decolourisation and COD reduction of sucrose-aspartic acid Maillard product

Author:
Yadav, Sangeeta, Chandra, Ram
Source:
Journal of Environmental Sciences 2013 v.25 pp. 172-180
ISSN:
1001-0742
Subject:
bacteria, binding properties, chemical oxygen demand, decolorization, distillery effluents, heavy metals, iron, manganese, melanoidins, microbial growth, molasses, phenol, scanning electron microscopes, shrinkage, sugarcane, wastes, zinc
Abstract:
Melanodins are amino-carbonyl complex, predominantly present in sugarcane molasses based distillery wastewater as major source of colourant. The microbial decolourisation of melanoidin is a challenge due to its binding property with other co-pollutants of distillery waste. Results revealed that the presence of Zn2+ (2.00-20.00 mg/L) in melanoidin solution (1200 mg/L) stimulated the bacterial growth and sucrose-aspartic acid Maillard product (SAA) decolourisation as compared to control, while Fe3+ and Mn2+ at the same concentration inhibited the process. However, the presence of phenol (100 mg/L) along with Zn2+, Fe3+ and Mn2+ suppressed the bacterial growth, SAA decolourisation and MnP activity. The shrinkage and reduced number of bacterial cell count at higher concentration of heavy metals in presence of phenol was also observed under scanning electron microscope.
Agid:
872970