Removal of nitrogen and phosphorus from wastewater using microalgae free cells in bath culture system

Rasoul‐Amini, Sara; Montazeri‐Najafabady, Nima; Shaker, Saeedeh; Safari, Azam; Kazemi, Abdolhassan; Mousavi, Pegah; Mobasher, Mohammad Ali; Ghasemi, Younes

doi:10.1016/j.bcab.2013.09.003

Cited by 95 publications

(32 citation statements)

References 15 publications

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“…Up to 84.11% nitrogen uptake from urban waste water was reported by Chlorella [44] and an 87.9% nitrogen removal was found in this study. The amount of removed total phosphorous tended to increase with higher initial dilutions of UWW.…”

Section: Resultssupporting

confidence: 55%

Nutrient Removal Efficiencies of <i>Chlorella vulgaris</i> from Urban Wastewater for Reduced Eutrophication

Singh¹,

Birru²,

Sibi³

2017

JEP

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Urban wastewater contains both organic and inorganic nutrients and discharge of untreated water increases nitrogen and phosphorous content in water bodies leading to eutrophication problem. Physical and chemical treatment of urban waste water produces large quantities of waste sludge associated with secondary pollution. Microalgae can assimilate nutrients especially nitrogen and phosphorous from wastewater for their growth and produce valuable biomass and lipid. This study was performed to determine the growth of Chlorella vulgaris in urban wastewater (UWW) and Bold's basal medium (BBM) thereby identifying cost effective growth medium for microalga cultivation. In addition, nutrient removal abilities of C. vulgaris from various dilutions of urban waste water were explored at 10 days cultivation period. Specific growth rate, biomass and lipid content were higher in microalgae grown in urban waste water than BBM. The highest lipid productivity of 14.31 mg· L −1 ·day −1 was achieved in the culture grown in UWW medium which exceeded the BBM at 1.15 fold. The amount of nutrient removal tended to increase with higher dilutions of UWW. Removal rates of upto 87.9% and 98.4%were recorded for total nitrogen and total phosphorous by C. vulgaris. The results emphasized that urban waste water as a cost effective growth medium for higher biomass and lipid production accompanied with the nutrient removal efficiency of microalgae to reduce eutrophication.

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Section: Resultssupporting

confidence: 55%

Nutrient Removal Efficiencies of <i>Chlorella vulgaris</i> from Urban Wastewater for Reduced Eutrophication

Singh¹,

Birru²,

Sibi³

2017

JEP

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“…Regarding nitrate removal, Chlorella sp. showed a nitrate uptake rate of up to 84.11 % in 14 days when treating urban wastewater with an initial concentration of 190 mgNO 3 -N/L (Rasoul-Amini et al 2014). In another research, microalgae species Chlorella sp., C. vulgaris, S. quadricauda and S. dimorphus tested in batch reactors fed with wastewater were able to remove nitrate (70 mg/L) and nitrite (18 mg/L) after 3 days between 43-54 % and 83-95 %, respectively (Singh and Thomas 2012).…”

Section: Removal Of Ammonium In the Presence Of Nitratementioning

confidence: 91%

“…Therefore, the development of efficient treatment processes is currently a worldwide priority. As an alternative biological treatment, 'microalgae' has been proposed for removing these pollutants from water due to its efficiency, ecological safety and low cost (Mallick 2002;Rasoul-Amini et al 2014). In addition, these microorganisms are able to remove even heavy metals and some other hazardous compounds (Kaonga et al 2008;Mane and Bhosle 2011).…”

Section: Introductionmentioning

confidence: 99%

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The effect of carbon source on nitrate and ammonium removal from drinking water by immobilised Chlorella sorokiniana

Petrović

Simonič

2015

Int. J. Environ. Sci. Technol.

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The feasibility of alginate-immobilised Chlorella sorokiniana for nitrate and ammonium removal from drinking water in regard to carbon source effects was studied in this paper. Three different natural carbon sources were tested in batch experiments with nitrate as nitrogen source: sucrose, grape juice and acacia honey. The nitrate removal efficiencies achieved at 50 mg/L of initial nitrate concentration under sucrose, grape juice and acacia honey were 93, 99 and 94 %, respectively. At 100 mg/L of nitrate, comparable efficiencies were obtained after approximately 3 days, whilst for acacia honey at 50 mg/L, it took only 2 days of cultivation and 3 days for the other two carbon sources. Grape juice and acacia honey showed better performances than sucrose, which must be linked to their chemical compositions. The study of the impact of biosorbent quantity on nitrate removal efficiency showed that sufficient nitrate removal efficiencies could be achieved with a beads/water ratio of 1:6.7 (v/v) or smaller. In addition, the beads' ages significantly impacted the nitrate removal. The removal of ammonium was studied in the presence of nitrate with acacia honey as carbon source.At the highest concentrations being tested (ammonium-30 mg/L and nitrate-50 mg/L), ammonium was completely removed in \3 days and nitrate by 81 % in 4 days, whereby the suitable beads/water ratio was 1:5. The priority of ammonium assimilation was noticed when compared to nitrate. According to the results, the alginateimmobilised C. sorokiniana represents a promising tool for the removal of nitrogen from drinking water sources.

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“…Como medida de mitigación, la remoción de nutrientes debe realizarse previamente a la descarga de aguas residuales en los medios acuáticos (Rasoul-Amini et al 2014, Morris et al 2017. No obstante, una de las principales fuentes responsable de la eutrofización son los efluentes secundarios municipales de las Plantas de Tratamiento de Aguas Residuales (PTAR) que contienen remanentes de nutrientes inorgánicos (NO 2 -, NO 3 -, NH 4 + y PO 4 3-) (Kuzawa et al 2006, Ruiz-Marin et al 2010, Rasoul-Amini et al 2014.…”

Section: Introductionunclassified

Biotratamiento de efluentes secundarios municipales utilizando microalgas: Efecto del pH, nutrientes (C, N y P) y enriquecimiento con CO2

Beltrán-Rocha¹,

Guajardo-Barbosa²,

Quintal

et al. 2017

Rev. biol. mar. oceanogr.

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Abstract.-This review discusses microalgae assimilation of C, N and P as affected by pH-dependent factors ( solubility, ionization state and bioavailability) and CO 2 enrichment in tertiary water treatment during microalgae biomass production. This study indicates the importance of monitoring critical conditions such as: 1) pH and inorganic carbon species interaction; 2) P bioavailability; 3) nitrogen removal through NH 3 volatilization and 4) NH 3 toxicity. Also, optimal CO 2 enriched air considerations, such as: 1) combining intermittent and variable CO 2 enrichment to avoid losses into the atmosphere; 2) preventing microalgae growth inhibition due to H 2 CO 3 formation and pH acidification at early stages of the culture and 3) maintenance of optimal pH ( 8.5) through the buffer system (CO 2 / HCO 3 -). Finally, we suggest that biological technologies based on microalgae culture to remove excessive nutrient loads and compliance with environmental law s from water, represent a viable alternative attached to recycling and revaluation of resources through the generation and potential uses of biomass (e.g., fertilizer, pigments and antioxidants).Key words: Microalgae, MWTP effluents, nutrient recycling, tertiary wastewater treatmentResumen.-Esta revisión analiza la asimilación de C, N y P por microalgas y la influencia de los factores dependientes del pH (solubilidad, estado de ionización y biodisponibilidad), así como la adición de CO 2 y su interacción en el tratamiento terciario de aguas municipales durante la producción de biomasa de microalgas. Este estudio destaca la importancia de monitorizar condiciones críticas como: 1) la interacción entre el pH y las especies de carbono inorgánico; 2) la biodisponibilidad de P; 3) reducción de N por formación de NH 3 y 4) toxicidad de NH 3 . Por otra parte, para el uso óptimo de aire enriquecido con CO 2 se recomienda considerar: 1) el suministro intermitente y variable de CO 2 para evitar pérdidas a la atmósfera; 2) optimizar el consumo de CO 2 evitando la acidificación del pH por formación de H 2 CO 3 e inhibición de las microalgas en etapas tempranas de cultivo; y 3) conservación de pH óptimo ( 8,5) a través del sistema de amortiguamiento CO 2 / HCO 3 -. Finalmente, se sugiere que las tecnologías biológicas basadas en el cultivo de microalgas para la eliminación de nutrientes y cumplimiento de normativas ambientales, representan una alternativa viable, que une el reciclaje y revalorización de recursos a través de la generación y usos potenciales de la biomasa (e.g., fertilizantes, pigmentos y antioxidantes).Palabras clave: Microalgas, efluentes PTAR, reciclaje de nutrientes, tratamiento terciario de efluentes

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Removal of nitrogen and phosphorus from wastewater using microalgae free cells in bath culture system

Cited by 95 publications

References 15 publications

Nutrient Removal Efficiencies of <i>Chlorella vulgaris</i> from Urban Wastewater for Reduced Eutrophication

Nutrient Removal Efficiencies of <i>Chlorella vulgaris</i> from Urban Wastewater for Reduced Eutrophication

The effect of carbon source on nitrate and ammonium removal from drinking water by immobilised Chlorella sorokiniana

Biotratamiento de efluentes secundarios municipales utilizando microalgas: Efecto del pH, nutrientes (C, N y P) y enriquecimiento con CO2

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Removal of nitrogen and phosphorus from wastewater using microalgae free cells in bath culture system

Cited by 95 publications

References 15 publications

Nutrient Removal Efficiencies of &lt;i&gt;Chlorella vulgaris&lt;/i&gt; from Urban Wastewater for Reduced Eutrophication

Nutrient Removal Efficiencies of &lt;i&gt;Chlorella vulgaris&lt;/i&gt; from Urban Wastewater for Reduced Eutrophication

The effect of carbon source on nitrate and ammonium removal from drinking water by immobilised Chlorella sorokiniana

Biotratamiento de efluentes secundarios municipales utilizando microalgas: Efecto del pH, nutrientes (C, N y P) y enriquecimiento con CO2

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Nutrient Removal Efficiencies of <i>Chlorella vulgaris</i> from Urban Wastewater for Reduced Eutrophication

Nutrient Removal Efficiencies of <i>Chlorella vulgaris</i> from Urban Wastewater for Reduced Eutrophication