Mitigating adverse impacts of varying sulfide/nitrate ratios on denitrifying sulfide removal process performance

Chuan Chen; Bo Shao; Ruo-Chen Zhang; Xi-Jun Xu; Xu Zhou; Yuan Yuan; Nan-Qi Ren; Duu-Jong Lee

doi:10.1016/j.biortech.2018.07.096

Mitigating adverse impacts of varying sulfide/nitrate ratios on denitrifying sulfide removal process performance

Chuan Chen, Bo Shao, Ruo-Chen Zhang, Xi-Jun Xu, Xu Zhou, Yuan Yuan, Nan-Qi Ren, Duu-Jong Lee^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

16 Citations (Scopus)

Abstract

Complete removal of nitrogen, sulfur and carbon in wastewaters by denitrifying sulfide removal (DSR) process can be achieved at stoichiometry sulfide to nitrate ratio (S/N) of 1:1 in expanded granular sludge bed reactor. Wastewaters with varying S/N ratios can adversely impact the DSR performances with deterioration of synergetic cooperation between autotrophic and heterotrophic denitrifiers. DO (dissolved oxygen) serves effectively as supplementary electron receiver for sulfide oxidation, leaving more nitrate for heterotrophic denitrifiers to utilize acetate. The optimal oxygen to sulfide molar ratio (DO/S) is 0.5:1 for complete removal of sulfide, nitrate and acetate at different S/N ratios. The heterotrophic denitrification rate was decreased to 0.03 ± 0.002, 0.24 ± 0.011 and 0.35 ± 0.027 NO₃ ⁻-N·h⁻¹·gVSS⁻¹ at S/N ratio of 5:2, 5:5 and 5:8, respectively, when DO/S of 3:1 was performed. This optimal condition was proposed as an easy-to-implement control criterion for subsiding the adverse impact by varying S/N ratios in handling real wastewaters.

Original language	English
Pages (from-to)	782-788
Journal	Bioresource Technology
Volume	267
DOIs	https://doi.org/10.1016/j.biortech.2018.07.096
Publication status	Published - 1 Nov 2018
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Research Keywords

Aerobic biological oxidation
Denitrifying sulfide removal
Dissolved oxygen
Sulfur oxidizing bacteria

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10.1016/j.biortech.2018.07.096

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title = "Mitigating adverse impacts of varying sulfide/nitrate ratios on denitrifying sulfide removal process performance",

abstract = "Complete removal of nitrogen, sulfur and carbon in wastewaters by denitrifying sulfide removal (DSR) process can be achieved at stoichiometry sulfide to nitrate ratio (S/N) of 1:1 in expanded granular sludge bed reactor. Wastewaters with varying S/N ratios can adversely impact the DSR performances with deterioration of synergetic cooperation between autotrophic and heterotrophic denitrifiers. DO (dissolved oxygen) serves effectively as supplementary electron receiver for sulfide oxidation, leaving more nitrate for heterotrophic denitrifiers to utilize acetate. The optimal oxygen to sulfide molar ratio (DO/S) is 0.5:1 for complete removal of sulfide, nitrate and acetate at different S/N ratios. The heterotrophic denitrification rate was decreased to 0.03 ± 0.002, 0.24 ± 0.011 and 0.35 ± 0.027 NO3 −-N·h−1·gVSS−1 at S/N ratio of 5:2, 5:5 and 5:8, respectively, when DO/S of 3:1 was performed. This optimal condition was proposed as an easy-to-implement control criterion for subsiding the adverse impact by varying S/N ratios in handling real wastewaters.",

keywords = "Aerobic biological oxidation, Denitrifying sulfide removal, Dissolved oxygen, Sulfur oxidizing bacteria",

author = "Chuan Chen and Bo Shao and Ruo-Chen Zhang and Xi-Jun Xu and Xu Zhou and Yuan Yuan and Nan-Qi Ren and Duu-Jong Lee",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2018",

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doi = "10.1016/j.biortech.2018.07.096",

language = "English",

volume = "267",

pages = "782--788",

journal = "Bioresource Technology",

issn = "0960-8524",

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TY - JOUR

T1 - Mitigating adverse impacts of varying sulfide/nitrate ratios on denitrifying sulfide removal process performance

AU - Chen, Chuan

AU - Shao, Bo

AU - Zhang, Ruo-Chen

AU - Xu, Xi-Jun

AU - Zhou, Xu

AU - Yuan, Yuan

AU - Ren, Nan-Qi

AU - Lee, Duu-Jong

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2018/11/1

Y1 - 2018/11/1

N2 - Complete removal of nitrogen, sulfur and carbon in wastewaters by denitrifying sulfide removal (DSR) process can be achieved at stoichiometry sulfide to nitrate ratio (S/N) of 1:1 in expanded granular sludge bed reactor. Wastewaters with varying S/N ratios can adversely impact the DSR performances with deterioration of synergetic cooperation between autotrophic and heterotrophic denitrifiers. DO (dissolved oxygen) serves effectively as supplementary electron receiver for sulfide oxidation, leaving more nitrate for heterotrophic denitrifiers to utilize acetate. The optimal oxygen to sulfide molar ratio (DO/S) is 0.5:1 for complete removal of sulfide, nitrate and acetate at different S/N ratios. The heterotrophic denitrification rate was decreased to 0.03 ± 0.002, 0.24 ± 0.011 and 0.35 ± 0.027 NO3 −-N·h−1·gVSS−1 at S/N ratio of 5:2, 5:5 and 5:8, respectively, when DO/S of 3:1 was performed. This optimal condition was proposed as an easy-to-implement control criterion for subsiding the adverse impact by varying S/N ratios in handling real wastewaters.

AB - Complete removal of nitrogen, sulfur and carbon in wastewaters by denitrifying sulfide removal (DSR) process can be achieved at stoichiometry sulfide to nitrate ratio (S/N) of 1:1 in expanded granular sludge bed reactor. Wastewaters with varying S/N ratios can adversely impact the DSR performances with deterioration of synergetic cooperation between autotrophic and heterotrophic denitrifiers. DO (dissolved oxygen) serves effectively as supplementary electron receiver for sulfide oxidation, leaving more nitrate for heterotrophic denitrifiers to utilize acetate. The optimal oxygen to sulfide molar ratio (DO/S) is 0.5:1 for complete removal of sulfide, nitrate and acetate at different S/N ratios. The heterotrophic denitrification rate was decreased to 0.03 ± 0.002, 0.24 ± 0.011 and 0.35 ± 0.027 NO3 −-N·h−1·gVSS−1 at S/N ratio of 5:2, 5:5 and 5:8, respectively, when DO/S of 3:1 was performed. This optimal condition was proposed as an easy-to-implement control criterion for subsiding the adverse impact by varying S/N ratios in handling real wastewaters.

KW - Aerobic biological oxidation

KW - Denitrifying sulfide removal

KW - Dissolved oxygen

KW - Sulfur oxidizing bacteria

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U2 - 10.1016/j.biortech.2018.07.096

DO - 10.1016/j.biortech.2018.07.096

M3 - RGC 21 - Publication in refereed journal

C2 - 30057004

SN - 0960-8524

VL - 267

SP - 782

EP - 788

JO - Bioresource Technology

JF - Bioresource Technology

ER -

Mitigating adverse impacts of varying sulfide/nitrate ratios on denitrifying sulfide removal process performance

Abstract

Bibliographical note

UN SDGs

Research Keywords

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