Sulfate-reduction, sulfide-oxidation and elemental sulfur bioreduction process: modeling and experimental validation

Xijun Xu; Chuan Chen; Duu-Jong Lee; Aijie Wang; Wanqian Guo; Xu Zhou; Hongliang Guo; Ye Yuan; Nanqi Ren; Jo-Shu Chang

doi:10.1016/j.biortech.2013.07.113

Sulfate-reduction, sulfide-oxidation and elemental sulfur bioreduction process: modeling and experimental validation

Bioresour Technol. 2013 Nov:147:202-211. doi: 10.1016/j.biortech.2013.07.113. Epub 2013 Jul 30.

Authors

Xijun Xu¹, Chuan Chen¹, Duu-Jong Lee², Aijie Wang¹, Wanqian Guo¹, Xu Zhou¹, Hongliang Guo¹, Ye Yuan¹, Nanqi Ren³, Jo-Shu Chang⁴

Affiliations

¹ State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
² State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan. Electronic address: djlee@ntu.edu.tw.
³ State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: rnq@hit.edu.cn.
⁴ Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan, Taiwan.

PMID: 23994962
DOI: 10.1016/j.biortech.2013.07.113

Abstract

This study describes the sulfate-reducing (SR) and sulfide-oxidizing (SO) process using Monod-type model with best-fit model parameters both being reported and estimated. The molar ratio of oxygen to sulfide (ROS) significantly affects the kinetics of the SR+SO process. The S(0) is produced by SO step but is later consumed by sulfur-reducing bacteria to lead to "rebound" in sulfide concentration. The model correlated well all experimental data in the present SR+SO tests and the validity of this approach was confirmed by independent sulfur bioreduction tests in four denitrifying sulfide removal (DSR) systems. Modeling results confirm that the ratio of oxygen to sulfide is a key factor for controlling S(0) formation and its bioreduction. Overlooking S(0) bioreduction step would overestimate the yield of S(0).

Keywords: Data fitting; Kinetic model; Microaeration; Sulfur bioreduction.

Publication types

Research Support, Non-U.S. Gov't
Validation Study

MeSH terms

Models, Theoretical*
Oxidation-Reduction
Sulfates / metabolism*
Sulfides / metabolism*
Sulfur / metabolism*

Substances

Sulfates
Sulfides
Sulfur