Ecobiological aspects of algae cultivation in wastewaters for recycling of nutrients and biofuel applications

Chinnasamy, Senthil; Sood, Anjuli; Renuka, Nirmal; Prasanna, Radha; Ratha, Sachitra Kumar; Bhaskar, Sailendra; Rengasamy, Ramasamy; Lewis, David M.

doi:10.4155/bfs.13.78

Cited by 16 publications

(4 citation statements)

References 105 publications

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“…The recent worldwide interest in the cultivation of microalgae for energy purposes, together with the need for environmentally more sustainable wastewater treatment technologies, have made microalgae wastewater treatment processes a promising alternative from economic and environmental points of view (Chinnasamy et al, 2014). In addition, the algal biomass produced can be a valuable raw material for the generation of bioenergy, biofertilizers and other valuable products.…”

Section: Table Olive Processing Wastewater Treatmentsmentioning

confidence: 99%

Table Olive Wastewater: Problem, Treatments and Future Strategy. A Review

et al. 2018

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The table olive industry produces a high quantity of wastewater annually. These wastewaters are very problematic because of their characteristics of high organic matter, high phenolic content, high salinity and conductivity. The quantities in which they are produced are also a serious problem. The worldwide production of table olives reached 2,550,000 tons in the last five campaigns, with the European Union contributing to 32% of total production. The problem of these wastewaters is focused on the Mediterranean area where the highest quantity of table olives is produced and to a lesser extent on the United States and South America. Countries like Spain produce around 540,000 tons of these wastewaters. At present, there is no standard treatment for these wastewaters with acceptable results and which is applied in the industry. Currently, the most common treatment is the storage of these wastewaters in large evaporation ponds where, during the dry season, the wastewater disappears due to evaporation. This is not a solution as the evaporation ponds depend completely on the climatology and have a high number of associated problems, such as bad odors, insect proliferation and the contamination of underground aquifers. Different studies have been carried out on table olive wastewater treatment, but the reality is that at the industrial level, none has been successfully applied. New and promising treatments are needed. The current review analyzes the situation of table olive wastewater treatment and the promising technologies for the future.

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Section: Table Olive Processing Wastewater Treatmentsmentioning

confidence: 99%

Table Olive Wastewater: Problem, Treatments and Future Strategy. A Review

et al. 2018

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“…While many studies on algal growth have been performed with artificial media a range of wastewaters have also been investigated [64]. It is encouraging that a more biological view, with elements of management are also considered by reviews summarizing the interactions among algae [66,67], with microbial consortia [15,34,46,49], and especially with wastewater associated microbes [68,69]. Consortia of microalgae, as opposed to single species cultures, are shown to be advantageous for productivity and crop stability [67,70].…”

Section: Review Of Reviewsmentioning

confidence: 99%

Note to Editor: Microalgae cultivation for wastewater treatment and biofuel production: a bibliographic overview of past and current trends

et al. 2017

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“…hydraulic residence time (HRT) of 3-10 days. (Chinnasamy et al, 2014). Proper mixing in the pond channels provides a biological system capable of treating primary or secondary effluent wastewater (Park et al, 2010).…”

Section: Wastewater Treatment With Algae Raceway Pondsmentioning

confidence: 99%

“…While assimilation removes soluble nitrogen, it does not remove nitrogen from the system but converts it to organic nitrogen. Sedimentation, or settling, is required to remove organic nitrogen from the system (Chinnasamy et al, 2014). Settling efficiencies are dependent on algae strains and harvesting technology (Park et al, 2011).…”

Section: Nitrogen Removal Mechanismsmentioning

confidence: 99%

Nutrient Removal From Clarified Municipal Wastewater Using Microalgae Raceway Ponds

Kraetsch¹

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Nutrient Removal From Clarified Municipal Wastewater Using Microalgae Raceway PondsJustin Andrew Kraetsch Shallow, mixed raceway ponds can be used to grow microalgae for the dual purposes of wastewater treatment and biofuel feedstock production. To improve the environmental sustainability of microalgae biofuels and to alleviate resource limitations, nutrients remaining after biofuel production should be recycled for additional cultivation. This thesis considers three topics: wastewater treatment by algae, nitrogen and phosphorus assimilation by algae, and algae cell disruption to facilitate nutrient recovery.The main experimental work was done in pilot raceway ponds growing polycultures of microalgae on clarified municipal wastewater. In addition, two lab-scale pretreatment technologies were tested for their ability to disrupt cells, as indicated by subsequent biomass organic nitrogen and particulate phosphorus degradation during sequential anaerobic and aerobic digestion. The two pretreatment technologies were sonication and high-pressure homogenization. in three sets of triplicates. One set was operated at a 2-day hydraulic residence time (HRT) on clarified wastewater throughout the study. A second set ("Round 1" of pondsin-series) was operated at a 3-day HRT, also on clarified wastewater. Its effluent was v clarified and then discharged into the third set ("Round 2" of ponds-in-series), which initially operated at a 4-day HRT but then later a 3-day HRT.The nutrient removal and assimilation data were compared seasonally-summer (MarchOctober) and winter (November-February). The triplicate raceways operating at a 2-day HRT achieved average total ammonia nitrogen (TAN) removal efficiencies of 11% in the winter and 71% in the summer, while dissolved reactive phosphorus (DRP) removal remained similar throughout seasonality. In the first ponds-in-series experiment (3-day HRT followed by 4-day), average summer TAN removal efficiencies for Round 1 and 2were 88% and nearly 100%, respectively. Round 1 and 2 average summer DRP removal efficiencies were 29% and 67%, respectively. The first ponds-in-series experiment was not conducted in the winter. In the second experiment, the Round 2 HRT was changed to 3 days. Average TAN removal efficiencies for Round 2 in the winter and summer were 88% and 100%, respectively. DRP removal for Round 2 increased from 38% in the winter to 66% in the summer.Total nitrogen (TN) mass balances on the raceway pond experiments were useful to illustrate the fate of influent nitrogen, including losses. In the first ponds-in-series experiment, 76% of the influent soluble nitrogen was converted to organic nitrogen by assimilation, while 6% of the influent ammonia was lost by volatilization. In the second ponds-in-series experiment, 81% of the influent soluble nitrogen was converted to organic nitrogen by assimilation and only 1% of the influent ammonia was lost by volatilization. The 2-day HRT raceway experiment achieved 41% conversion of influent soluble nitrogen to organic nitrogen by as...

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Ecobiological aspects of algae cultivation in wastewaters for recycling of nutrients and biofuel applications

Cited by 16 publications

References 105 publications

Table Olive Wastewater: Problem, Treatments and Future Strategy. A Review

Table Olive Wastewater: Problem, Treatments and Future Strategy. A Review

Note to Editor: Microalgae cultivation for wastewater treatment and biofuel production: a bibliographic overview of past and current trends

Nutrient Removal From Clarified Municipal Wastewater Using Microalgae Raceway Ponds

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