Adsorption and Degradation of Organics in Wastewater on Municipal Sludge

Abstract

Adsorption and degradation of organic compounds on sludge were investigated by comparing activated and inactivated sludge at various dosages, pH values, and temperatures. The organic compounds in wastewater were identified and evaluated through fluorescence spectra. The results show that optimum adsorption occurred as the activated and inactivated sludge concentration was 4000 mg/L at a pH of 7.99 and a temperature of 30 °C. The fluorescence scanning spectrum indicated that activated sludge could remove protein-like organic matter, fulvic acid-like organic matter, and humic acid-like organic matter by 22.1, 9.4, and 41.2%, respectively, via adsorption only or by 25.9, 9.8, and 74.3%, respectively, via adsorption and degradation. Under optimum conditions, by using the good adsorption performance of sludge combined with other sewage treatment technologies, the treatment of high-content organic wastewater can be achieved.

Iron-Based Catalysts Derived from Iron-Containing Sludge for Enhanced Catalytic Performance of H2S Selective Catalytic Oxidation

“…In recent years, with the increase in the use of chemical raw materials and industrial additives in chemical synthesis, it has become increasingly difficult to treat industrial wastewater. − Faced with the raised emission standards, traditional secondary biochemical treatment can no longer meet the new emission requirements. Therefore, it is necessary to add some advanced treatment to meet the new high-standard emission requirements. , Among them, Fenton oxidation technology was widely used in deep treatment .…”