Treatment of Cyanide Bearing Aqueous Solutions by Plain and BiologicallyActivated Carbon

摘要

Comparative study of biodegradation and adsorption alone with simultaneous adsorption and biodegradation (SAB) process for cyanide removal has been carried out. Pseudomonas putida used zinc cyanide as secondary source of carbon and sole source of nitrogen at initial pH of 7.0 and temperature 30 ℃. At an initial zinc cyanide concentration of 100 mg/1, pH and temperature were optimized for removal efficiency of cyanide by adsorption, biodegradation and SAB. Adsorption was carried on plain granular activated carbon, whereas SAB was carried out on Pseudomonas putida immobilized GAC. The microbes adopted to grow at maximum cyanide concentration were harvested and its ability to degrade cyanide was measured in both biodegradation and SAB. The removal efficiency of biologically activated carbon (BAC) was found better as compared to plain GAC.