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

Razi Epsztein; Michael Beliavski; Sheldon Tarre; Michal Green

doi:https://doi.org/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

Technion - Israel Institute of Technology

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

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

Keywords

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

All Science Journal Classification (ASJC) codes

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

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https://doi.org/10.1016/j.chemosphere.2016.07.005

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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",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

year = "2016",

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doi = "https://doi.org/10.1016/j.chemosphere.2016.07.005",

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TY - JOUR

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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

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DO - https://doi.org/10.1016/j.chemosphere.2016.07.005

M3 - مقالة

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

All Science Journal Classification (ASJC) codes

Access to Document

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