Mathematical modeling of simultaneous carbon-nitrogen-sulfur removal from industrial wastewater
Journal
Journal of Hazardous Materials
Journal Volume
321
Pages
371-381
Date Issued
2017
Author(s)
Abstract
A mathematical model of carbon, nitrogen and sulfur removal (C-N-S) from industrial wastewater was constructed considering the interactions of sulfate-reducing bacteria (SRB), sulfide-oxidizing bacteria (SOB), nitrate-reducing bacteria (NRB), facultative bacteria (FB), and methane producing archaea (MPA). For the kinetic network, the bioconversion of C-N by heterotrophic denitrifiers (NO3 − → NO2 − → N2), and that of C-S by SRB (SO4 2− → S2−) and SOB (S2− → S0) was proposed and calibrated based on batch experimental data. The model closely predicted the profiles of nitrate, nitrite, sulfate, sulfide, lactate, acetate, methane and oxygen under both anaerobic and micro-aerobic conditions. The best-fit kinetic parameters had small 95% confidence regions with mean values approximately at the center. The model was further validated using independent data sets generated under different operating conditions. This work was the first successful mathematical modeling of simultaneous C-N-S removal from industrial wastewater and more importantly, the proposed model was proven feasible to simulate other relevant processes, such as sulfate-reducing, sulfide-oxidizing process (SR-SO) and denitrifying sulfide removal (DSR) process. The model developed is expected to enhance our ability to predict the treatment of carbon-nitrogen-sulfur contaminated industrial wastewater. © 2016 Elsevier B.V.
Subjects
Carbon; Industrial wastewater treatment; Mathematical modeling; Nitrogen; Sulfur
Other Subjects
Bacteria; Biological water treatment; Carbon; Denitrification; Industrial water treatment; Mathematical models; Methane; Nitrates; Nitrogen; Sulfur; Sulfur compounds; Wastewater treatment; Denitrifying sulfide removal; Different operating conditions; Heterotrophic denitrifiers; Industrial wastewater treatment; Methane producing archaea; Nitrate-reducing bacteria; Sulfate reducing bacteria; Sulfide-oxidizing bacteria; Nitrogen removal; acetic acid; carbon; lactic acid; methane; nitrate; nitrite; nitrogen; organic carbon; oxygen; sulfate; sulfide; sulfur; carbon; nitrogen; sulfur; carbon; industrial enterprise; methanogenic bacterium; nitrifying bacterium; nitrogen; numerical model; pollutant removal; reaction kinetics; sulfate-reducing bacterium; wastewater; Article; biotransformation; calibration; denitrification; heterotrophy; industrial waste; kinetic parameters; mathematical model; nitrate reducing bacterium; nonhuman; simulation; sludge; sulfate reducing bacterium; sulfide oxidizing bacterium; waste component removal; waste water management; analysis; bioremediation; chemistry; microbial consortium; procedures; theoretical model; waste water; water management; water pollutant; Biodegradation, Environmental; Carbon; Industrial Waste; Microbial Consortia; Models, Theoretical; Nitrogen; Sulfur; Waste Water; Water Pollutants, Chemical; Water Purification
Type
journal article