Submerged bed versus unsaturated flow reactor: A pressurized hydrogenotrophic denitrification reactor as a case study

Razi Epsztein; Michael Beliavski; Sheldon Tarre; Michal Green

doi:10.1016/j.chemosphere.2016.07.005

Submerged bed versus unsaturated flow reactor: A pressurized hydrogenotrophic denitrification reactor as a case study

Razi Epsztein, Michael Beliavski, Sheldon Tarre, Michal Green

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The paper compares the main features of a submerged bed reactor (SuBR) with bubbling and recirculation of gas to those of an unsaturated flow reactor (uSFR) with liquid recirculation. A novel pressurized closed-headspace hydrogenotrophic denitrification system characterized by safe and economic utilization of H₂ gas was used for the comparison. Under similar conditions, denitrification rates were lower in the SuBR as a result of a lower effective biofilm surface area and overall gas-liquid mass transfer coefficient k_La. Similar values of effluent DOC were achieved for both reactors, although effluent suspended solids concentration of the SuBR were substantially higher. On the other hand, the required cleaning frequency in the SuBR was 2.5 times lower. Moreover, the SuBR is expected to reduce the recirculation energy consumption by 0.35 kWh/m³ treated.

Original language	English
Pages (from-to)	151-156
Number of pages	6
Journal	Chemosphere
Volume	161
DOIs	https://doi.org/10.1016/j.chemosphere.2016.07.005
State	Published - 1 Oct 2016
Externally published	Yes

Keywords

Closed-headspace reactor
Gas recirculation
Hydrogenotrophic denitrification
Liquid recirculation
Submerged bed
Unsaturated flow

ASJC Scopus subject areas

Environmental Engineering
General Chemistry
Environmental Chemistry
Pollution
Public Health, Environmental and Occupational Health
Health, Toxicology and Mutagenesis

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10.1016/j.chemosphere.2016.07.005

Cite this

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title = "Submerged bed versus unsaturated flow reactor: A pressurized hydrogenotrophic denitrification reactor as a case study",

abstract = "The paper compares the main features of a submerged bed reactor (SuBR) with bubbling and recirculation of gas to those of an unsaturated flow reactor (uSFR) with liquid recirculation. A novel pressurized closed-headspace hydrogenotrophic denitrification system characterized by safe and economic utilization of H2 gas was used for the comparison. Under similar conditions, denitrification rates were lower in the SuBR as a result of a lower effective biofilm surface area and overall gas-liquid mass transfer coefficient kLa. Similar values of effluent DOC were achieved for both reactors, although effluent suspended solids concentration of the SuBR were substantially higher. On the other hand, the required cleaning frequency in the SuBR was 2.5 times lower. Moreover, the SuBR is expected to reduce the recirculation energy consumption by 0.35 kWh/m3 treated.",

keywords = "Closed-headspace reactor, Gas recirculation, Hydrogenotrophic denitrification, Liquid recirculation, Submerged bed, Unsaturated flow",

author = "Razi Epsztein and Michael Beliavski and Sheldon Tarre and Michal Green",

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year = "2016",

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doi = "10.1016/j.chemosphere.2016.07.005",

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TY - JOUR

T1 - Submerged bed versus unsaturated flow reactor

T2 - A pressurized hydrogenotrophic denitrification reactor as a case study

AU - Epsztein, Razi

AU - Beliavski, Michael

AU - Tarre, Sheldon

AU - Green, Michal

PY - 2016/10/1

Y1 - 2016/10/1

N2 - The paper compares the main features of a submerged bed reactor (SuBR) with bubbling and recirculation of gas to those of an unsaturated flow reactor (uSFR) with liquid recirculation. A novel pressurized closed-headspace hydrogenotrophic denitrification system characterized by safe and economic utilization of H2 gas was used for the comparison. Under similar conditions, denitrification rates were lower in the SuBR as a result of a lower effective biofilm surface area and overall gas-liquid mass transfer coefficient kLa. Similar values of effluent DOC were achieved for both reactors, although effluent suspended solids concentration of the SuBR were substantially higher. On the other hand, the required cleaning frequency in the SuBR was 2.5 times lower. Moreover, the SuBR is expected to reduce the recirculation energy consumption by 0.35 kWh/m3 treated.

AB - The paper compares the main features of a submerged bed reactor (SuBR) with bubbling and recirculation of gas to those of an unsaturated flow reactor (uSFR) with liquid recirculation. A novel pressurized closed-headspace hydrogenotrophic denitrification system characterized by safe and economic utilization of H2 gas was used for the comparison. Under similar conditions, denitrification rates were lower in the SuBR as a result of a lower effective biofilm surface area and overall gas-liquid mass transfer coefficient kLa. Similar values of effluent DOC were achieved for both reactors, although effluent suspended solids concentration of the SuBR were substantially higher. On the other hand, the required cleaning frequency in the SuBR was 2.5 times lower. Moreover, the SuBR is expected to reduce the recirculation energy consumption by 0.35 kWh/m3 treated.

KW - Closed-headspace reactor

KW - Gas recirculation

KW - Hydrogenotrophic denitrification

KW - Liquid recirculation

KW - Submerged bed

KW - Unsaturated flow

UR - https://www.scopus.com/pages/publications/84978410133

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DO - 10.1016/j.chemosphere.2016.07.005

M3 - Article

C2 - 27424057

AN - SCOPUS:84978410133

SN - 0045-6535

VL - 161

SP - 151

EP - 156

JO - Chemosphere

JF - Chemosphere

ER -

Submerged bed versus unsaturated flow reactor: A pressurized hydrogenotrophic denitrification reactor as a case study

Abstract

Keywords

ASJC Scopus subject areas

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