Simultaneous removal of sulfide, nitrate and acetate: Kinetic modeling
Journal
Journal of Hazardous Materials
Journal Volume
178
Journal Issue
1月3日
Pages
35-41
Date Issued
2010
Author(s)
Abstract
Biological removal of sulfide, nitrate and chemical oxygen demand (COD) simultaneously from industrial wastewaters to elementary sulfur (S0), N2, and CO2, or named the denitrifying sulfide (DSR) process, is a cost effective and environmentally friendly treatment process for high strength sulfide and nitrate laden organic wastewater. Kinetic model for the DSR process was established for the first time on the basis of Activated Sludge Model No. 1 (ASM1). The DSR experiments were conducted at influent sulfide concentrations of 200-800mg/L, whose results calibrate the model parameters. The model correlates well with the DSR process dynamics. By introducing the switch function and the inhibition function, the competition between autotrophic and heterotrophic denitrifiers is quantitatively described and the degree of inhibition of sulfide on heterotrophic denitrifiers is realized. The model output indicates that the DSR reactor can work well at 0.5<C/S<3.0 with influent sulfide concentration of 400-1000mg/L. At >1000mg/L influent sulfide, however, the DSR system will break down. ? 2010 Elsevier B.V.
Subjects
Activated Sludge Model No. 1
Denitrifying sulfide removal systems
EGSB
Modeling
SDGs
Type
journal article