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Article ; Online: Process design and economic analysis for the production of microalgae from anaerobic digestates in open raceway ponds.

Alavianghavanini, Arsalan / Moheimani, Navid R / Bahri, Parisa A

2024 Volume 923, Page(s) 171554

Abstract: A model based framework was established for large scale assessment of microalgae production using anaerobically digested effluent considering varied climatic parameters such as solar irradiance and air temperature. The aim of this research was to ... ...

Abstract	A model based framework was established for large scale assessment of microalgae production using anaerobically digested effluent considering varied climatic parameters such as solar irradiance and air temperature. The aim of this research was to identify the optimum monthly average culture depth operation to minimize the cost of producing microalgae grown on anaerobic digestion effluents rich in ammoniacal nitrogen with concentration of 248 mg L
MeSH term(s)	Microalgae ; Ponds ; Anaerobiosis ; Wastewater ; Biomass ; Nitrogen
Chemical Substances	Wastewater ; Nitrogen (N762921K75)
Language	English
Publishing date	2024-03-06
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2024.171554
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Article ; Online: Culture depth effect on Scenedesmus sp. growth, photo-physiology and nutrient removal rate in anaerobically digested abattoir effluent

Shayesteh, Hajar / Raeisossadati, Mohammadjavad / Vadiveloo, Ashiwin / Bahri, Parisa A. / Moheimani, Navid R.

J Appl Phycol. 2023 Apr., v. 35, no. 2 p.567-580

2023

Abstract: Here, we evaluated the effect of culture depth on the growth and nutrient removal rate of Scenedesmus sp. grown in anaerobically digested abattoir effluent (ADAE) and cultivated semi-continuously in raceway ponds at depths of 14 cm, 17 cm, 20 cm, and 23 ... ...

Abstract	Here, we evaluated the effect of culture depth on the growth and nutrient removal rate of Scenedesmus sp. grown in anaerobically digested abattoir effluent (ADAE) and cultivated semi-continuously in raceway ponds at depths of 14 cm, 17 cm, 20 cm, and 23 cm during Austral winter and summer. Culture medium pH was kept constant at pH 6.5 for all treatments throughout the experimental period using a pH–stat system. Algal cultures grown in summer had 2.3- 2.7 times higher biomass productivity than the same grown in winter. In both seasons, maximum volumetric productivity of this alga was achieved at 14 cm depth (14 cm depth⩾ 17 cm depth⩾ 20 cm depth⩾ 23 cm depth). However, areal biomass productivity of culture grown at 23 cm depth was 12% and 29% higher than that of culture grown at 14 cm depth in winter and summer, respectively. In addition, nitrogen, phosphorus and COD areal removal rates were significantly higher in cultures operated at 23 cm among all treatments in both seasons. The effective quantum yield (Fq'/Fₘ') in summer was 23 cm depth = 20 cm depth > 17 cm depth = 14 cm depth while it followed 14 cm depth⩾ 17 cm depth⩾ 20 cm depth⩾ 23 cm depth in winter, indicating significance of operational conditions on algal photosynthesis. The outcome of this study shows that, irrespective of the season, operating the culture in higher depths significantly increased areal biomass productivity as well as areal nutrient removal rates when treating ADAE.
Keywords	Scenedesmus ; algae ; anaerobic digestion ; biomass production ; culture media ; nitrogen ; pH ; phosphorus ; photosynthesis ; slaughterhouses ; summer ; winter
Language	English
Dates of publication	2023-04
Size	p. 567-580.
Publishing place	Springer Netherlands
Document type	Article ; Online
ZDB-ID	1002324-0
ISSN	1573-5176 ; 0921-8971
ISSN (online)	1573-5176
ISSN	0921-8971
DOI	10.1007/s10811-023-02915-2
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Article: Evaluation of electrocoagulation, flocculation, and sedimentation harvesting methods on microalgae consortium grown in anaerobically digested abattoir effluent

Raeisossadati, Mohammadjavad / Moheimani, Navid R / Bahri, Parisa A

Journal of applied phycology. 2021 June, v. 33, no. 3

2021

Abstract: Microalgae dewatering is a major bottleneck for biomass production in a large-scale microalgal production system which accounts for 20–60% of production cost. In this study, three dewatering systems of electrocoagulation, flocculation, and pH-induced ... ...

Abstract	Microalgae dewatering is a major bottleneck for biomass production in a large-scale microalgal production system which accounts for 20–60% of production cost. In this study, three dewatering systems of electrocoagulation, flocculation, and pH-induced flocculation were evaluated for microalgal consortium grown in anaerobically digested abattoir effluent at pH 6.5 and 9.5. At the shortest time (15 min) and the highest current density (0.08 A cm⁻²), the highest microalgae recoveries of 78 and 84% were obtained with the corresponding power consumptions of 1.25 and 1.07 kWh kg⁻¹ for cultures at pH 6.5 and 9.5. For microalgae suspension at pH 6.5, the highest biomass recovery of 77% was obtained when 100 mg L⁻¹ of FeCl₃·6H₂O (after 15 min) or 100 mg L⁻¹ of Al₂(SO₄)₃·18H₂O (after 30 min) was added. However, microalgal recoveries significantly increased when FeCl₃·6H₂O or Al₂(SO₄)₃·18H₂O was used with the culture at pH 9.5. pH-Induced experiments showed that cultures adjusted at pH 10.5 had 36% higher biomass recovery compared to that in cultures at pH 8.5 after 2 h. The results of this study showed that cultures at higher pH (9.5) had a better microalgae recovery in all dewatering systems than cultures at lower pH (6.5).
Keywords	algology ; anaerobic digestion ; biomass production ; dewatering ; electrocoagulation ; flocculation ; microalgae ; pH ; slaughterhouses
Language	English
Dates of publication	2021-06
Size	p. 1631-1642.
Publishing place	Springer Netherlands
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	1002324-0
ISSN	1573-5176 ; 0921-8971
ISSN (online)	1573-5176
ISSN	0921-8971
DOI	10.1007/s10811-021-02403-5
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Article ; Online: Long term outdoor microalgal phycoremediation of anaerobically digested abattoir effluent.

Shayesteh, Hajar / Vadiveloo, Ashiwin / Bahri, Parisa A / Moheimani, Navid R

Journal of environmental management

2022 Volume 323, Page(s) 116322

Abstract: Sufficient and reliable long-term field data on the growth, productivity and nutrient removal rates of microalgal based wastewater treatment system is essential to validate its overall techno-economic feasibility. Here, we investigated the semi- ... ...

Abstract	Sufficient and reliable long-term field data on the growth, productivity and nutrient removal rates of microalgal based wastewater treatment system is essential to validate its overall techno-economic feasibility. Here, we investigated the semi-continuous microalgal cultivation of Scenedesmus sp. in anaerobically digested abattoir effluent (ADAE) for 13 months in outdoor raceway ponds operated at 20 cm depth. This study was initiated with three different cultures consisting of 1) monocultures of Chlorella sp., 2) Scenedesmus sp., and 3) an equal mixed concentration of both microalgae species. However, after 15 weeks, Scenedesmus sp. was found to be the most dominant microalgae species in all the different cultures, even completely taking over the Chlorella sp. monoculture. Over the course of summer and early autumn, the average weekly biomass productivity of Scenedesmus sp. cultures was 12.5 ± 0.6 g m
MeSH term(s)	Microalgae ; Chlorella ; Abattoirs ; Carbon Dioxide ; Reproducibility of Results ; Scenedesmus ; Nitrogen ; Phosphates ; Carbohydrates ; Lipids
Chemical Substances	Carbon Dioxide (142M471B3J) ; Nitrogen (N762921K75) ; Phosphates ; Carbohydrates ; Lipids
Language	English
Publishing date	2022-09-22
Publishing country	England
Document type	Journal Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2022.116322
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Article: Lactic acid production from food waste at an anaerobic digestion biorefinery: effect of digestate recirculation and sucrose supplementation.

Bühlmann, Christopher H / Mickan, Bede S / Tait, Stephan / Batstone, Damien J / Bahri, Parisa A

Frontiers in bioengineering and biotechnology

2023 Volume 11, Page(s) 1177739

Abstract: Low lactic acid (LA) yields from direct food waste (FW) fermentation restrict this production pathway. However, nitrogen and other nutrients within FW digestate, in combination with sucrose supplementation, may enhance LA production and improve ... ...

Abstract	Low lactic acid (LA) yields from direct food waste (FW) fermentation restrict this production pathway. However, nitrogen and other nutrients within FW digestate, in combination with sucrose supplementation, may enhance LA production and improve feasibility of fermentation. Therefore, this work aimed to improve LA fermentation from FWs by supplementing nitrogen (0-400 mgN·L
Language	English
Publishing date	2023-05-12
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2719493-0
ISSN	2296-4185
ISSN	2296-4185
DOI	10.3389/fbioe.2023.1177739
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Article ; Online: Microalgae cultivation for treating agricultural effluent and producing value-added products.

Alavianghavanini, Arsalan / Shayesteh, Hajar / Bahri, Parisa A / Vadiveloo, Ashiwin / Moheimani, Navid R

The Science of the total environment

2023 Volume 912, Page(s) 169369

Abstract: Wastewater generated within agricultural sectors such as dairies, piggeries, poultry farms, and cattle meat processing plants is expected to reach 600 million ... ...

Abstract	Wastewater generated within agricultural sectors such as dairies, piggeries, poultry farms, and cattle meat processing plants is expected to reach 600 million m
MeSH term(s)	Animals ; Cattle ; Wastewater ; Microalgae ; Agriculture ; Biomass ; Nitrogen ; Phosphorus
Chemical Substances	Wastewater ; Nitrogen (N762921K75) ; Phosphorus (27YLU75U4W)
Language	English
Publishing date	2023-12-15
Publishing country	Netherlands
Document type	Journal Article ; Review
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2023.169369
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Article: Long term outdoor microalgal phycoremediation of anaerobically digested abattoir effluent

Shayesteh, Hajar / Vadiveloo, Ashiwin / Bahri, Parisa A. / Moheimani, Navid R.

Journal of environmental management. 2022 Dec. 01, v. 323

2022

Abstract	Sufficient and reliable long-term field data on the growth, productivity and nutrient removal rates of microalgal based wastewater treatment system is essential to validate its overall techno-economic feasibility. Here, we investigated the semi-continuous microalgal cultivation of Scenedesmus sp. in anaerobically digested abattoir effluent (ADAE) for 13 months in outdoor raceway ponds operated at 20 cm depth. This study was initiated with three different cultures consisting of 1) monocultures of Chlorella sp., 2) Scenedesmus sp., and 3) an equal mixed concentration of both microalgae species. However, after 15 weeks, Scenedesmus sp. was found to be the most dominant microalgae species in all the different cultures, even completely taking over the Chlorella sp. monoculture. Over the course of summer and early autumn, the average weekly biomass productivity of Scenedesmus sp. cultures was 12.5 ± 0.6 g m⁻² d⁻¹ which was 16% and 30% higher than productivities recorded in spring and winter, respectively. All available ammoniacal nitrogen (NH₃–N) was found to be exhausted during each growth period with an average 33.6% nitrogen assimilation rate. The average rate of phosphate and COD (chemical oxygen demand) removals were 85.2% and 37.5% throughout the cultivation period. No significant differences were found in carbohydrate, lipid and protein content of Scenedesmus sp. during different seasons of the year. Over 53% increase in biomass productivity can be achieved if CO₂ is added to control culture pH at pH 6.5. Here, we successfully demonstrated reliability of continuous long-term cultivation of microalgae in ADAE for simultaneous wastewater treatment and algal biomass production.
Keywords	Chlorella ; Scenedesmus ; ammonium nitrogen ; anaerobic digestion ; autumn ; biomass production ; carbohydrates ; carbon dioxide ; chemical oxygen demand ; chlorophyll ; lipids ; microalgae ; nitrogen ; pH ; phosphates ; slaughterhouses ; spring ; summer ; wastewater treatment ; winter
Language	English
Dates of publication	2022-1201
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2022.116322
Database	NAL-Catalogue (AGRICOLA)

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Article: Comparison between continuous and daytime mixing for the treatment of raw anaerobically digested abattoir effluent (ADAE) and microalgae production in open raceway ponds

Vadiveloo, Ashiwin / Shayesteh, Hajar / Bahri, Parisa A. / Moheimani, Navid R.

Bioresource technology reports. 2022 Feb., v. 17

2022

Abstract: This study investigated the outdoor cultivation of two local microalgae species (Chlorella sp. and Scenedesmus sp.) in raw anaerobically digested abattoir effluent (ADAE) which were subjected to both continuous (24 h) and daytime only (12 h) paddle wheel ...

Abstract	This study investigated the outdoor cultivation of two local microalgae species (Chlorella sp. and Scenedesmus sp.) in raw anaerobically digested abattoir effluent (ADAE) which were subjected to both continuous (24 h) and daytime only (12 h) paddle wheel mixing. The goal of this study was to identify the most efficient microalgae species and mixing condition for raw ADAE bioremediation. No differences in Chlorella sp. biomass productivity were recorded for both mixing conditions while values were higher (14%) for 24 h mixed Scenedesmus sp. Despite the exhaustion of ammoniacal nitrogen (NH₃-N) in all treatments, only between 14 and 28% of NH₃-N was assimilated for biomass production. Microalgae growth in ADAE significantly reduced the total aerobic bacteria population and eliminated Escherichia coli content in ADAE for all treatments. Overall, Scenedesmus sp. demonstrated higher biomass productivity and nutrient removal efficiency in ADAE when compared to Chlorella sp., with the continuously (24 h) mixed cultures being most efficient.
Keywords	Chlorella ; Escherichia coli ; Scenedesmus ; algae culture ; ammonium nitrogen ; anaerobic digestion ; biomass production ; bioremediation ; microalgae ; slaughterhouses
Language	English
Dates of publication	2022-02
Publishing place	Elsevier Ltd
Document type	Article
ISSN	2589-014X
DOI	10.1016/j.biteb.2022.100981
Database	NAL-Catalogue (AGRICOLA)

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Article: Anaerobic digestate abattoir effluent (ADAE), a suitable source of nutrients for Arthrospira platensis cultivation

Matos, Ângelo P / Vadiveloo, Ashiwin / Bahri, Parisa A / Moheimani, Navid R

Algal research. 2021 Apr., v. 54

2021

Abstract: Untreated as well as partially treated anaerobic digestate abattoir effluent (ADAE) were used for the cultivation of Arthrospira platensis in this study. The effect of CO₂ addition on the biomass productivity, nutrient removal efficiency and biochemical ... ...

Abstract	Untreated as well as partially treated anaerobic digestate abattoir effluent (ADAE) were used for the cultivation of Arthrospira platensis in this study. The effect of CO₂ addition on the biomass productivity, nutrient removal efficiency and biochemical composition were also investigated. Arthrospira platensis exhibited significant improved growth in raw ADAE when alkalinity of the medium was adjusted to 6.3 g L⁻¹ using NaHCO₃. Addition of CO₂ resulted in 20% increase in biomass productivity and higher ammoniacal nitrogen removal rate (99.0%) when compared to the cultures with no CO₂ supplementation. No significant differences were found in protein (50.2%) and phycocyanin (12.0%) content of A. platensis cultivated in raw ADAE supplemented with HCO₃⁻ and that grown in synthetic Zarrouk medium. This study demonstrated that raw ADAE can be successfully used as culture media for A. platensis when its alkalinity is adjusted using bicarbonate. Such an approach would reduce the need of freshwater and external synthetic nutrients for A. platensis cultivation if the aim is to produce reclaimable water as well as biomass rich in protein content and phycocyanin for potential use as an animal and aquaculture feed.
Keywords	Arthrospira platensis ; algae ; alkalinity ; ammonium nitrogen ; animals ; aquaculture feeds ; bicarbonates ; biomass production ; carbon dioxide ; culture media ; freshwater ; nutrients ; phycocyanin ; protein content ; research ; slaughterhouses
Language	English
Dates of publication	2021-04
Publishing place	Elsevier B.V.
Document type	Article
Note	NAL-light
ISSN	2211-9264
DOI	10.1016/j.algal.2021.102216
Database	NAL-Catalogue (AGRICOLA)

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Article: Can CO2 addition improve the tertiary treatment of anaerobically digested abattoir effluent (ADAE) by Scenedesmus sp. (Chlorophyta)?

Shayesteh, Hajar / Vadiveloo, Ashiwin / Bahri, Parisa A. / Moheimani, Navid R.

Algal research. 2021 Oct., v. 58

2021

Abstract: Microalgae offer a cost-effective option for wastewater treatment due to their natural ability to uptake and assimilate various forms of nutrients for the production of valuable biomass. Here, we assessed the potential of Scenedesmus sp. culture for ... ...

Abstract	Microalgae offer a cost-effective option for wastewater treatment due to their natural ability to uptake and assimilate various forms of nutrients for the production of valuable biomass. Here, we assessed the potential of Scenedesmus sp. culture for treating anaerobically digested abattoir effluent (ADAE). Scenedesmus sp. was cultured at different pH (5.5, 6.5, 7.5 and 8.5) regulated by the addition of CO₂ (pH-stat systems) under outdoor climatic conditions in paddle wheel driven raceway ponds. pCO₂ was highest in cultures operated at pH 5.5 followed by 6.5, 7.5, 8.5 and uncontrolled pH. The highest biomass productivity was obtained for the Scenedesmus culture grown at pH 6.5 (19.24 g m⁻²d⁻¹) which was 2.1 times greater than uncontrolled pH culture (9.13 g m⁻²d⁻¹). In general, the growth was pH 6.5 > pH 7.5 = pH 8.5 > uncontrolled pH > pH 5.5. The percentage of ammoniacal nitrogen (NH₃−N) fixed into biomass was highest (about 86%) for the cultures at pH 6.5. In overall, percentage of NH₃-N assimilation was pH 6.5 > pH 7.5 > pH 8.5 > uncontrolled pH > pH 5.5. More than 83% of phosphorus was assimilated into algal biomass when Scenedesmus was grown at pH 6.5, 7.5 and 8.5. These results clearly showed that the addition of CO₂ (keeping pH at 6.5) did not only remarkably increased biomass productivity of microalgae grown in ADAE but also significantly increased the removal of nutrients from the wastewater.
Keywords	Scenedesmus ; ammonium nitrogen ; anaerobic digestion ; biomass production ; carbon dioxide ; cost effectiveness ; microalgae ; pH ; phosphorus ; research ; slaughterhouses ; wastewater ; wastewater treatment
Language	English
Dates of publication	2021-10
Publishing place	Elsevier B.V.
Document type	Article
ISSN	2211-9264
DOI	10.1016/j.algal.2021.102379
Database	NAL-Catalogue (AGRICOLA)

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