Biomass production and nutrient removal by Chlorella sp. as affected by sludge liquor concentration

Åkerström, Å.; Mortensen, Leiv M.; Rusten, B.; Gislerød, Hans R.

doi:10.1016/j.jenvman.2014.05.015

Cited by 57 publications

(19 citation statements)

References 49 publications

(57 reference statements)

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“…Moreover, it is interesting to note that the total biomass harvested growing C. vulgaris and Scenedesmus I in dA30W or dB5W is higher compared to previous results achieved by growing C. sorokiniana or Scenedesmus strains in diluted anaerobic digestate originating from cattle manure digestion or wastewater treatment, obtaining a final biomass concentration in the range of 0.25−0.36 g/L [39,54]. Although the results presented herein are lower compared to other reports where the cultivation of Chlorella strains on anaerobic digestates were performed with bubbling 3% CO 2 in the photobioreactors yielding biomass concentrations of up to 2 g/L [55], in this work the photobioreactors were bubbled with air. It is important also to consider that the anaerobic digestates analyzed here were autoclaved before use, since the main focus of this research work was to investigate if the nutrient composition of the different substrates was sufficient to sustain microalgal cultivation.…”

Section: Discussionmentioning

confidence: 94%

Microalgae Cultivation on Anaerobic Digestate of Municipal Wastewater, Sewage Sludge and Agro-Waste

Zuliani

Frison

Jelić

et al. 2016

IJMS

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Microalgae are fast-growing photosynthetic organisms which have the potential to be exploited as an alternative source of liquid fuels to meet growing global energy demand. The cultivation of microalgae, however, still needs to be improved in order to reduce the cost of the biomass produced. Among the major costs encountered for algal cultivation are the costs for nutrients such as CO2, nitrogen and phosphorous. In this work, therefore, different microalgal strains were cultivated using as nutrient sources three different anaerobic digestates deriving from municipal wastewater, sewage sludge or agro-waste treatment plants. In particular, anaerobic digestates deriving from agro-waste or sewage sludge treatment induced a more than 300% increase in lipid production per volume in Chlorella vulgaris cultures grown in a closed photobioreactor, and a strong increase in carotenoid accumulation in different microalgae species. Conversely, a digestate originating from a pilot scale anaerobic upflow sludge blanket (UASB) was used to increase biomass production when added to an artificial nutrient-supplemented medium. The results herein demonstrate the possibility of improving biomass accumulation or lipid production using different anaerobic digestates.

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Section: Discussionmentioning

confidence: 94%

Microalgae Cultivation on Anaerobic Digestate of Municipal Wastewater, Sewage Sludge and Agro-Waste

Zuliani

Frison

Jelić

et al. 2016

IJMS

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“…Several research studies were already performed with microalgal growth in wastewaters from different sources: (i) domestic wastewater [19][20][21]; (ii) anaerobic digestion wastewater [22][23][24]; (iii) livestock wastewater [25][26][27]; and (iv) agro-industrial wastewater [28,29]. In almost all studies, microalgae were able to efficiently remove the monitored nutrients.…”

Section: Introductionmentioning

confidence: 99%

Towards sustainable microalgal biomass production by phycoremediation of a synthetic wastewater: A kinetic study

et al. 2015

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“…Published literature showed that the concentration of any one nutrient (either nitrate or phosphate) fluctuate at a time while other remains constant (Xin et al 2010, Arbib et al 2013, Samorı` et al 2013, Zhang & Hong 2014. Therefore, levels of both nutrients vary simultaneously without changing their ratios (Aslan & Kapdan 2006, Akerström et al 2014. At high levels of nitrate reduced absorption of phosphate from water has been reported (Pittman et al 2011, Craggs et al 2013.…”

Section: Introductionmentioning

confidence: 99%

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2017

Trop. Plant Res.

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Synthetic microalgae ecology is a promising approach to regulate the concentrations of nutrients in wastewater reservoirs. The aim of experiments was to evaluate the role of six microalgae monocultures and their consortia in restoring the water quality of water reservoirs represented here in the form of media BG11 + (nitrate rich), BG11 -(nitrate poor) and wastewater from carpet effluent (CE). The algal species utilized in the present experiment were Anabaena sp., Chlorella sp., Oscillatoria sp., Nannochloropsis sp., Scenedesmus sp., Phormidium sp., and their synthetic consortia. The water parameters analyzed were dissolved oxygen (DO), water conductivity, pH and concentrations of nutrients (nitrates, phosphates, nitrites). We observed that Chlorella sp. produced maximum biomass of 2.217±0.126 g.L -1 in BG11 + media followed by ) in CE respectively. The range of pH value and DO for different media was found between 8.25-8.87 and 6.14-10.54 mg.L -1 respectively, and conductivity was increased with the growth of algae. The study suggests that beneficial algae and their consortia can be logically selected for biomass production and for improving the water quality.

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Biomass production and nutrient removal by Chlorella sp. as affected by sludge liquor concentration

Cited by 57 publications

References 49 publications

Microalgae Cultivation on Anaerobic Digestate of Municipal Wastewater, Sewage Sludge and Agro-Waste

Microalgae Cultivation on Anaerobic Digestate of Municipal Wastewater, Sewage Sludge and Agro-Waste

Towards sustainable microalgal biomass production by phycoremediation of a synthetic wastewater: A kinetic study

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