Wastewater as a Source of Nutrients for Microalgae Biomass Production

Muylaert, Koenraad; Beuckels, Annelies; Depraetere, Orily; Foubert, Imogen; Μάρκου, Γιώργος; Vandamme, Dries

doi:10.1007/978-3-319-16640-7_5

Cited by 13 publications

(6 citation statements)

References 107 publications

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“…In the urban wastewater treatment, the removal of macro-nutrients such as nitrates and phosphates is one of the main criteria for tertiary treatment. Usually, nitrogen is removed without further recycling and thus it is converted to N 2 and will pass into the atmosphere (George et al, 2003 ; Muylaert et al, 2015 ). Phosphorus is mainly precipitated by the addition of cations such as calcium, aluminum, and iron which is costly (George et al, 2003 ).…”

Section: The Potential Of Microalgae In Wastewater Treatmentmentioning

confidence: 99%

The Use of Microalgae for Coupling Wastewater Treatment With CO2 Biofixation

Molazadeh

Ahmadzadeh

Pourianfar

et al. 2019

Front. Bioeng. Biotechnol.

227

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Production and emission of CO2 from different sources have caused significant changes in the climate, which is the major concern related to global warming. Among other CO2 removal approaches, microalgae can efficiently remove CO2 through the rapid production of algal biomass. In addition, microalgae have the potential to be used in wastewater treatment. Although, wastewater treatment and CO2 removal by microalgae have been studied separately for a long time, there is no detailed information available on combining both processes. In this review article, microalgae-based CO2 biofixation, various microalgae cultivation systems,¯ and microalgae-derived wastewater treatment are separately discussed, followed by the concept of integration of CO2 biofixation process and wastewater treatment. In each section, details of energy efficiency and differences across microalgae species are also given.

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Section: The Potential Of Microalgae In Wastewater Treatmentmentioning

confidence: 99%

The Use of Microalgae for Coupling Wastewater Treatment With CO2 Biofixation

Molazadeh

Ahmadzadeh

Pourianfar

et al. 2019

Front. Bioeng. Biotechnol.

227

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“…General chemical characteristics (emphasis on N and P) of different wastewater sources. [16][17][18] matter, and about 99% of which is liquid and the remaining 1% is a solid waste. [14] Wastewaters, therefore are generated from a variety of sources.…”

Section: Current Status Of Wastewater Treatment In Africamentioning

confidence: 99%

“…These include municipal/agro-industrial, carpet industry, starch industry, abattoir industry, oil, and gas industry wastewaters. [15,16] In broad terms, wastewater can be classified into municipal/domestic, industrial, and agricultural wastewaters based on the source of production. It follows that wastewater has a broad diversity of chemical properties and constituents due to different sources of production ( Table 2).…”

Section: Current Status Of Wastewater Treatment In Africamentioning

confidence: 99%

“…Successful growths of several species of microalgae including Chlamydomonas sp., Euglena sp., Micractinium sp., Botryococcus sp., Coelastrum sp., Chlorella sp., Selenastrum sp., Scenesdesmus sp., Oscillatoria sp., and Microcystis sp., in different wastewater sources have been reported in detail. [9,16,[21][22][23][24] Among all of them, Chlorella and Scenedesmus spp. are the most robust and versatile candidates due to their strong tolerance to different wastewater conditions ( Table 3).…”

Section: Microalgal Species For Wastewater Treatmentmentioning

confidence: 99%

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Algal Cultivation for Treating Wastewater in African Developing Countries: A Review

Nwoba

Vadiveloo

Ogbonna

et al. 2020

CLEAN Soil Air Water

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The tremendous increase in human population and rapid decline in freshwater resources have necessitated the development of innovative and sustainable wastewater treatment methods. Africa as a developing continent is currently backing on sustainable solutions to tackle impending water resource crisis brought forward by wastewater‐induced environmental pollution and climate change. Microalgae‐based wastewater treatment systems represent an emerging technology that is capable of meeting the new demand for improved wastewater treatment and climate change mitigation strategies in an environmentally friendly manner. This review critically looks at the opportunities of Africa in harnessing and exploiting the potential of microalgae for the treatment of various wastewaters based on their capacity to recycle nutrients and for concurrent production of valuable biomass and several useful metabolites. Wastewaters, if improperly/completely untreated and discharged, simultaneously pollute freshwater sources and present significant health and environmental risks. Nutrients in wastewater can be utilized and recovered in the form of marketable biomass and products when integrated with the cultivation of microalgae. Several valuable bioproducts can be generated from wastewater‐grown microalgal biomass including biofuels, biofertilizers, animal feed, and various bioactive compounds. This biorefinery approach would most certainly improve wastewater treatment process economics, enhancing the technical feasibility of algae‐based wastewater remediation in African countries.

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“…Many microalgae have advantages over conventional terrestrial oleaginous crops such as the possibility of setting up the enterprise on land with low commercial value or devastated areas, continuous crops production, possibility of using wastewater, and the possibility of concomitant production of several coproducts (e.g., b-caroteno, lutein, and astaxanthin) with great commercial interest (Muylaert et al 2015;Lin et al 2015). Moreover, microalgae exhibit higher photosynthetic efficiency and greater lipid production rate than terrestrial oil crops (Chisti 2007).…”

Section: Introductionmentioning

confidence: 99%

Viability of biodiesel production from a thermophilic microalga in conventional and alternative culture media

et al. 2018

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Microalgae biodiesel production depends on several factors to minimize the costs of the production process from both biomass and biodiesel. In some outdoor systems, the temperature can be higher than 35°C, which is lethal for several algae. Prospecting microalga from thermal environments seems to be a good option. Therefore, the objective of this work was to isolate a microalga (Acutodesmus obliquus (Turpin) Hegewald and Hanagata) from thermal water and evaluate its cultivation productivity in Bold Basal Medium (BBM) and in lower cost alternative media. One alternative medium contained only the main growth ingredients (DAF), the other included these same ingredients with the addition of wastewater from the purification of grease-based raw materials (DAF ? OGR). Microalga biodiesel productivity was also compared with the biodiesel yield of soybean, which is one of the main raw materials currently used for biodiesel production. The microalga was shown to provide biomass with similar productivity using the three different culture media in log phase. The microalga exhibited biodiesel productivity from 46 to 61 times higher than soybean; using 5.5-7.2% of the water and 1.6-2.2% of the land required for soybean cultivation to produce the same amount of biodiesel. The DAF ? OGR medium, which costs 29% of the cost of the BBM medium, proved to be an efficient alternative medium compared to other in biomass productivity. Levels of tri-unsaturated and polyunsaturated fatty acids from A. obliquus microalga were slightly higher than those standardized by EN14214, requiring that the biodiesel be mixed with antioxidants.

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Wastewater as a Source of Nutrients for Microalgae Biomass Production

Cited by 13 publications

References 107 publications

The Use of Microalgae for Coupling Wastewater Treatment With CO2 Biofixation

The Use of Microalgae for Coupling Wastewater Treatment With CO2 Biofixation

Algal Cultivation for Treating Wastewater in African Developing Countries: A Review

Viability of biodiesel production from a thermophilic microalga in conventional and alternative culture media

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