In situ biological CO                         2                          fixation and wastewater nutrient removal with Neochloris oleoabundans in batch photobioreactor

S. A. Razzak

doi:10.1007/s00449-018-2017-x

In situ biological CO ₂ fixation and wastewater nutrient removal with Neochloris oleoabundans in batch photobioreactor

S. A. Razzak^*

^*Corresponding author for this work

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

34 Scopus citations

Abstract

Microalgae cultivation in wastewater media in phototrophic condition is a promising approach for integrated CO ₂ biofixation and wastewater treatment. For this, Neochloris oleoabundans was used to investigate the tertiary treatment of wastewater along with CO ₂ biofixation. In this investigation, biomass productivity, CO ₂ biofixation rate and percentage of total nitrogen (TN) and total phosphorus (TP) removal from synthetic wastewater are considered under three different operating conditions: temperature, CO ₂ feed concentration and nitrogen to phosphorus (NP) ratio in the media. Cultivation of N. oleoabundans was found to be highly temperature sensitive. With the increase of cultivation temperature from 25 to 45 °C, declining trends of biomass concentration, productivity and percentage of TN and TP removal were observed. Cultivation temperature of 25 °C was found to be most favorable in terms of biomass productivity, CO ₂ biofixation rate, percentage of TN and TP removal of 92 (mg L ⁻¹ day ⁻¹ ), 145 (mg L ⁻¹ day ⁻¹ ), 100% and 32%, respectively. Arrhenius-type kinetic model was used and the model showed good agreement with the experimental findings. Activation energy for the active stage and decay stage was found to be E _a = 88.8 kJ mol ⁻¹ and E _d = 8.4 kJ mol ⁻¹ , respectively. With the increase of CO ₂ feed concentration, biomass productivity increased and the maximum biomass concentration and productivity was achieved at 6%. After that with the increase in CO ₂ , a declining trend was observed. With the increase of NP ratio from 1:1 to 2:1, both the biomass productivity and CO ₂ biofixation were increased, but later were subsequently decreased with increase of NP ratio from 4:1 to 8:1. It is interesting that TP removal was increased with NP ratio and 100 percent of TP removal was achieved at 4:1 and 8:1 conditions.

Original language	English
Pages (from-to)	93-105
Number of pages	13
Journal	Bioprocess and Biosystems Engineering
Volume	42
Issue number	1
DOIs	https://doi.org/10.1007/s00449-018-2017-x
State	Published - 30 Jan 2019

Bibliographical note

Publisher Copyright:
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

Biomass
CO biofixation
Microalgae
Nutrient removal
Wastewater treatment

ASJC Scopus subject areas

Biotechnology
Bioengineering

UN SDGs

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

Access to Document

10.1007/s00449-018-2017-x

Cite this

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title = " In situ biological CO 2 fixation and wastewater nutrient removal with Neochloris oleoabundans in batch photobioreactor ",

abstract = " Microalgae cultivation in wastewater media in phototrophic condition is a promising approach for integrated CO 2 biofixation and wastewater treatment. For this, Neochloris oleoabundans was used to investigate the tertiary treatment of wastewater along with CO 2 biofixation. In this investigation, biomass productivity, CO 2 biofixation rate and percentage of total nitrogen (TN) and total phosphorus (TP) removal from synthetic wastewater are considered under three different operating conditions: temperature, CO 2 feed concentration and nitrogen to phosphorus (NP) ratio in the media. Cultivation of N. oleoabundans was found to be highly temperature sensitive. With the increase of cultivation temperature from 25 to 45 °C, declining trends of biomass concentration, productivity and percentage of TN and TP removal were observed. Cultivation temperature of 25 °C was found to be most favorable in terms of biomass productivity, CO 2 biofixation rate, percentage of TN and TP removal of 92 (mg L −1 day −1 ), 145 (mg L −1 day −1 ), 100\% and 32\%, respectively. Arrhenius-type kinetic model was used and the model showed good agreement with the experimental findings. Activation energy for the active stage and decay stage was found to be E a = 88.8 kJ mol −1 and E d = 8.4 kJ mol −1 , respectively. With the increase of CO 2 feed concentration, biomass productivity increased and the maximum biomass concentration and productivity was achieved at 6\%. After that with the increase in CO 2 , a declining trend was observed. With the increase of NP ratio from 1:1 to 2:1, both the biomass productivity and CO 2 biofixation were increased, but later were subsequently decreased with increase of NP ratio from 4:1 to 8:1. It is interesting that TP removal was increased with NP ratio and 100 percent of TP removal was achieved at 4:1 and 8:1 conditions.",

keywords = "Biomass, CO biofixation, Microalgae, Nutrient removal, Wastewater treatment",

author = "Razzak, \{S. A.\}",

note = "Publisher Copyright: {\textcopyright} 2018, Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2019",

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day = "30",

doi = "10.1007/s00449-018-2017-x",

language = "English",

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journal = "Bioprocess and Biosystems Engineering",

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In situ biological CO ₂ fixation and wastewater nutrient removal with Neochloris oleoabundans in batch photobioreactor . / Razzak, S. A.
In: Bioprocess and Biosystems Engineering, Vol. 42, No. 1, 30.01.2019, p. 93-105.

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

TY - JOUR

T1 - In situ biological CO 2 fixation and wastewater nutrient removal with Neochloris oleoabundans in batch photobioreactor

AU - Razzak, S. A.

PY - 2019/1/30

Y1 - 2019/1/30

N2 - Microalgae cultivation in wastewater media in phototrophic condition is a promising approach for integrated CO 2 biofixation and wastewater treatment. For this, Neochloris oleoabundans was used to investigate the tertiary treatment of wastewater along with CO 2 biofixation. In this investigation, biomass productivity, CO 2 biofixation rate and percentage of total nitrogen (TN) and total phosphorus (TP) removal from synthetic wastewater are considered under three different operating conditions: temperature, CO 2 feed concentration and nitrogen to phosphorus (NP) ratio in the media. Cultivation of N. oleoabundans was found to be highly temperature sensitive. With the increase of cultivation temperature from 25 to 45 °C, declining trends of biomass concentration, productivity and percentage of TN and TP removal were observed. Cultivation temperature of 25 °C was found to be most favorable in terms of biomass productivity, CO 2 biofixation rate, percentage of TN and TP removal of 92 (mg L −1 day −1 ), 145 (mg L −1 day −1 ), 100% and 32%, respectively. Arrhenius-type kinetic model was used and the model showed good agreement with the experimental findings. Activation energy for the active stage and decay stage was found to be E a = 88.8 kJ mol −1 and E d = 8.4 kJ mol −1 , respectively. With the increase of CO 2 feed concentration, biomass productivity increased and the maximum biomass concentration and productivity was achieved at 6%. After that with the increase in CO 2 , a declining trend was observed. With the increase of NP ratio from 1:1 to 2:1, both the biomass productivity and CO 2 biofixation were increased, but later were subsequently decreased with increase of NP ratio from 4:1 to 8:1. It is interesting that TP removal was increased with NP ratio and 100 percent of TP removal was achieved at 4:1 and 8:1 conditions.

AB - Microalgae cultivation in wastewater media in phototrophic condition is a promising approach for integrated CO 2 biofixation and wastewater treatment. For this, Neochloris oleoabundans was used to investigate the tertiary treatment of wastewater along with CO 2 biofixation. In this investigation, biomass productivity, CO 2 biofixation rate and percentage of total nitrogen (TN) and total phosphorus (TP) removal from synthetic wastewater are considered under three different operating conditions: temperature, CO 2 feed concentration and nitrogen to phosphorus (NP) ratio in the media. Cultivation of N. oleoabundans was found to be highly temperature sensitive. With the increase of cultivation temperature from 25 to 45 °C, declining trends of biomass concentration, productivity and percentage of TN and TP removal were observed. Cultivation temperature of 25 °C was found to be most favorable in terms of biomass productivity, CO 2 biofixation rate, percentage of TN and TP removal of 92 (mg L −1 day −1 ), 145 (mg L −1 day −1 ), 100% and 32%, respectively. Arrhenius-type kinetic model was used and the model showed good agreement with the experimental findings. Activation energy for the active stage and decay stage was found to be E a = 88.8 kJ mol −1 and E d = 8.4 kJ mol −1 , respectively. With the increase of CO 2 feed concentration, biomass productivity increased and the maximum biomass concentration and productivity was achieved at 6%. After that with the increase in CO 2 , a declining trend was observed. With the increase of NP ratio from 1:1 to 2:1, both the biomass productivity and CO 2 biofixation were increased, but later were subsequently decreased with increase of NP ratio from 4:1 to 8:1. It is interesting that TP removal was increased with NP ratio and 100 percent of TP removal was achieved at 4:1 and 8:1 conditions.

KW - Biomass

KW - CO biofixation

KW - Microalgae

KW - Nutrient removal

KW - Wastewater treatment

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DO - 10.1007/s00449-018-2017-x

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SN - 1615-7591

VL - 42

SP - 93

EP - 105

JO - Bioprocess and Biosystems Engineering

JF - Bioprocess and Biosystems Engineering

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In situ biological CO 2 fixation and wastewater nutrient removal with Neochloris oleoabundans in batch photobioreactor