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  1. Artikel ; 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

    The Science of the total environment

    2024  Band 923, Seite(n) 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-Begriff(e) Microalgae ; Ponds ; Anaerobiosis ; Wastewater ; Biomass ; Nitrogen
    Chemische Substanzen Wastewater ; Nitrogen (N762921K75)
    Sprache Englisch
    Erscheinungsdatum 2024-03-06
    Erscheinungsland Netherlands
    Dokumenttyp 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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  2. Artikel ; 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.
    Schlagwörter Scenedesmus ; algae ; anaerobic digestion ; biomass production ; culture media ; nitrogen ; pH ; phosphorus ; photosynthesis ; slaughterhouses ; summer ; winter
    Sprache Englisch
    Erscheinungsverlauf 2023-04
    Umfang p. 567-580.
    Erscheinungsort Springer Netherlands
    Dokumenttyp Artikel ; 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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  3. Artikel: 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).
    Schlagwörter algology ; anaerobic digestion ; biomass production ; dewatering ; electrocoagulation ; flocculation ; microalgae ; pH ; slaughterhouses
    Sprache Englisch
    Erscheinungsverlauf 2021-06
    Umfang p. 1631-1642.
    Erscheinungsort Springer Netherlands
    Dokumenttyp Artikel
    Anmerkung 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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  4. Artikel: 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  Band 11, Seite(n) 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
    Sprache Englisch
    Erscheinungsdatum 2023-05-12
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2719493-0
    ISSN 2296-4185
    ISSN 2296-4185
    DOI 10.3389/fbioe.2023.1177739
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; 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  Band 323, Seite(n) 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-Begriff(e) Microalgae ; Chlorella ; Abattoirs ; Carbon Dioxide ; Reproducibility of Results ; Scenedesmus ; Nitrogen ; Phosphates ; Carbohydrates ; Lipids
    Chemische Substanzen Carbon Dioxide (142M471B3J) ; Nitrogen (N762921K75) ; Phosphates ; Carbohydrates ; Lipids
    Sprache Englisch
    Erscheinungsdatum 2022-09-22
    Erscheinungsland England
    Dokumenttyp 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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  6. Artikel ; 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  Band 912, Seite(n) 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-Begriff(e) Animals ; Cattle ; Wastewater ; Microalgae ; Agriculture ; Biomass ; Nitrogen ; Phosphorus
    Chemische Substanzen Wastewater ; Nitrogen (N762921K75) ; Phosphorus (27YLU75U4W)
    Sprache Englisch
    Erscheinungsdatum 2023-12-15
    Erscheinungsland Netherlands
    Dokumenttyp 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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  7. Artikel: 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- ... ...

    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.
    Schlagwörter 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
    Sprache Englisch
    Erscheinungsverlauf 2022-1201
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    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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  8. Artikel: 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.
    Schlagwörter Chlorella ; Escherichia coli ; Scenedesmus ; algae culture ; ammonium nitrogen ; anaerobic digestion ; biomass production ; bioremediation ; microalgae ; slaughterhouses
    Sprache Englisch
    Erscheinungsverlauf 2022-02
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ISSN 2589-014X
    DOI 10.1016/j.biteb.2022.100981
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  9. Artikel ; Online: Nitrogen dynamics and biological processes in soil amended with microalgae grown in abattoir digestate to recover nutrients

    Shayesteh, Hajar / Jenkins, Sasha N. / Moheimani, Navid R. / Bolan, Nanthi / Bühlmann, Christopher H. / Gurung, Sun Kumar / Vadiveloo, Ashiwin / Bahri, Parisa A. / Mickan, Bede S.

    Journal of Environmental Management. 2023 Oct., v. 344 p.118467-

    2023  

    Abstract: The use of microalgae for nutrient recovery from wastewater and subsequent conversion of the harvested biomass into fertilizers offers a sustainable approach towards creating a circular economy. Nonetheless, the process of drying the harvested microalgae ...

    Abstract The use of microalgae for nutrient recovery from wastewater and subsequent conversion of the harvested biomass into fertilizers offers a sustainable approach towards creating a circular economy. Nonetheless, the process of drying the harvested microalgae represents an additional cost, and its impact on soil nutrient cycling compared to wet algal biomass is not thoroughly understood. To investigate this, a 56-day soil incubation experiment was conducted to compare the effects of wet and dried Scenedesmus sp. microalgae on soil chemistry, microbial biomass, CO₂ respiration, and bacterial community diversity. The experiment also included control treatments with glucose, glucose + ammonium nitrate, and no fertilizer addition. The Illumina Mi-Seq platform was used to profile the bacterial community and in-silico analysis was performed to assess the functional genes involved in N and C cycling processes. The maximum CO₂ respiration and microbial biomass carbon (MBC) concentration of dried microalgae treatment were 17% and 38% higher than those of paste microalgae treatment, respectively. NH₄⁺ and NO₃⁻ released slowly and through decomposition of microalgae by soil microorganisms as compared to synthetic fertilizer control. The results indicate that heterotrophic nitrification may contribute to nitrate production for both microalgae amendments, as evidenced by low amoA gene abundance and a decrease in ammonium with an increase in nitrate concentration. Additionally, dissimilatory nitrate reduction to ammonium (DNRA) may be contributing to ammonium production in the wet microalgae amendment, as indicated by an increase in nrfA gene and ammonium concentration. This is a significant finding because DNRA leads to N retention in agricultural soils instead of N loss via nitrification and denitrification. Thus, further processing the microalgae through drying or dewetting may not be favorable for fertilizer production as the wet microalgae appeared to promote DNRA and N retention.
    Schlagwörter Scenedesmus ; ammonium ; ammonium nitrate ; bacterial communities ; carbon dioxide ; circular economy ; computer simulation ; denitrification ; environmental management ; fertilizers ; genes ; glucose ; microalgae ; microbial biomass ; microbial carbon ; nitrate reduction ; nitrification ; nitrogen ; slaughterhouses ; soil ; soil nutrients ; wastewater ; Nutrient cycling ; Soil chemistry ; Diversity profiling ; In-silico functional gene analysis
    Sprache Englisch
    Erscheinungsverlauf 2023-10
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel ; Online
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.118467
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  10. Artikel: 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.
    Schlagwörter Arthrospira platensis ; algae ; alkalinity ; ammonium nitrogen ; animals ; aquaculture feeds ; bicarbonates ; biomass production ; carbon dioxide ; culture media ; freshwater ; nutrients ; phycocyanin ; protein content ; research ; slaughterhouses
    Sprache Englisch
    Erscheinungsverlauf 2021-04
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    Anmerkung NAL-light
    ISSN 2211-9264
    DOI 10.1016/j.algal.2021.102216
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