Effect of environmental factors on the biomass and lipid production of microalgae grown in wastewaters

Moreno-Garcia, L.; Gariépy, Yvan; Barnabé, Simon; Raghavan, G.S.V.

doi:10.1016/j.algal.2019.101521

Cited by 28 publications

(12 citation statements)

References 28 publications

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“…Microalgae grown in these media differed in biomass productivity and nutrient composition, which was expected, as the two wastewaters differed greatly in composition (Table 1) and microalgal production is directly influenced by the concentration of substrates in the medium (Wild et al, 2019). Previous studies reported similar findings (Moreno-Garcia et al, 2019;Wild et al, 2019). Wild et al (2019) and Sukačová et al (2019) reported biomass productivities of 0.22 and 0.23 g L −1 day −1 , respectively, for Chlorella sp.…”

Section: Introductionsupporting

confidence: 58%

“…Dairy farm runoff is estimated at 0.045-0.060 m³ animal −1 day −1 , but this value may vary depending on the volume of water used to clean stalls and equipment (Campos et al, 2002). The reuse of agricultural wastewaters in microalgae cultivation can provide economic and environmental advantages, as they are a lowcost source of nutrients and can help to reduce water consumption (Moreno-Garcia, Gariépy, Barnabé, & Raghavan, 2019). Algae require an adequate supply of carbon, nitrogen, and phosphorus (Moreno-Garcia et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The reuse of agricultural wastewaters in microalgae cultivation can provide economic and environmental advantages, as they are a lowcost source of nutrients and can help to reduce water consumption (Moreno-Garcia, Gariépy, Barnabé, & Raghavan, 2019). Algae require an adequate supply of carbon, nitrogen, and phosphorus (Moreno-Garcia et al, 2019). Nutrient and CO 2 levels of fish and dairy cattle wastewater differ greatly.…”

Section: Introductionmentioning

confidence: 99%

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Biomass productivity of Chlorella vulgaris cultivated in fish and dairy cattle wastewaters

Nicolau

Souza

Arroyo

et al. 2021

Semina: Ciênc. Agrár.

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The biomass productivity and nutrient composition of microalgae, such as Chlorella vulgaris, depend on the cultivation process and the nutrient content of growth media. Thus, in this study aimed to investigate the biomass productivity of C. vulgaris cultivated in fish and dairy cattle wastewaters. Thirty wastewater samples (2.5 L) were collected from system of production. Microalgae were cultivated in Erlenmeyer flasks containing 10 mL of microalgae and 1,790 mL of wastewater under constant light of 5,000 lux for 16 days at 25 ± 2.0 °C. Wastewater samples differed in composition. Biomass productivity was 47 % higher (P<0.0001) in dairy cattle than in fish wastewater, reaching 67.61 g m?3 day?1 (dry matter basis, DM) when compared by Student’s t-test (P<0.05). Cultivation media also had an effect on biomass chemical composition. The C. vulgaris grown in dairy cattle wastewater was higher in crude protein and ash contents (359.6 g kg?1 DM and 230.4 g kg?1 DM, respectively), whereas microalgae grown in fish wastewater had higher nitrogen-free extract content (347.8 g kg?1 DM). Crude fat content did not vary greatly (mean of 313.15 g kg?1 DM). The pH (8.0 – 8.7) and ammonia concentration (0.07 to 0.4 mg L?1) in fish wastewater was stable throughout the 16-day experimental period. In dairy wastewater, pH increased up (6.3 to 8.9) to the fourth day and remained constant thereafter, and ammonia concentration increased up (24.3 to 28.7 mg L?1) to the eighth day and then it declined (2.1 mg L?1). The C. vulgaris was successfully grown in both wastewaters, but productivity was higher in dairy cattle wastewater.

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Section: Introductionsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biomass productivity of Chlorella vulgaris cultivated in fish and dairy cattle wastewaters

Nicolau

Souza

Arroyo

et al. 2021

Semina: Ciênc. Agrár.

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“…Since COD i came from an AnMBR plant which degraded most of the organic matter content(Seco et al, 2018) and COD e was the permeate of an ultrafiltration system which removed most of the suspended organic matter, their variability was relatively low, so that COD e and COD i concentrations were not expected to have a significant influence on the model. However, the culture's COD concentration was expected to have a stronger influence on the projection model, since the presence of organic carbon in the wastewater has been reported to be able to modify the microalgae cell metabolism, changing their activity (Moreno-García et al, 2019). In addition, COD is usually directly related to microalgae biomass(Ambat et al (2018)).…”

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confidence: 99%

Continuous 3-year outdoor operation of a flat-panel membrane photobioreactor to treat effluent from an anaerobic membrane bioreactor

et al. 2020

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A membrane photobioreactor (MPBR) plant was operated continuously for 3 years to evaluate the separate effects of different factors, including: biomass and hydraulic retention times (BRT, HRT), light path (Lp), nitrification rate (NOxR), nutrient loading rates (NLR, PLR) and others. The overall effect of all these parameters, which influence MPBR performance had not previously been assessed. The multivariate projection approach chosen for this study provided a good description of the collected data and facilitated their visualisation and interpretation. Forty variables used to control and assess MPBR performance were evaluated during three years of continuous outdoor operation by means of principal component analysis (PCA) and partial least squares (PLS) analysis. The PCA identified the photobioreactor light path as the factor with the largest influence on data variability. Other important factors were: nitrogen and phosphorus recovery rates (NRR, PRR), biomass productivity (BP), optical density of 680 nm (OD680), ammonium and phosphorus effluent concentration (NH 4 , P), HRT, BRT, air flow rate (F air) and nitrogen and phosphorus loading rates (NLR and PLR). The MPBR performance could be adequately estimated by a PLS model based on all the recorded variables, but this estimation 2 worsened appreciably when only the controlled variables (Lp, F air , HRT and BRT) were used as predictors, which underlines the importance of the non-controlled variables on MPBR performance. The microalgae cultivation process could thus only be partially controlled by the design and operating variables. A high nitrification rate was found to be inadvisable, since it showed an inverse correlation with NRR. In this respect, temperature and microalgae biomass concentration appeared to be the main factors to mitigate nitrifying bacteria activity.

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“…There are three important nutrients (carbon, nitrogen, and phosphorus) needed for the algae to grow. All these nutrients can be found abundance in different types of waste streams such as landfill leachates, composting filtrates coming from anaerobic composting sites, wastewater coming from household and municipal liquid wastes [9]. The colony of bacteria in biological treatment can reduced contaminants from landfill leachate.…”

Section: Norhafezah Kasmuri and Muhammad Zaidi Misnimentioning

confidence: 99%

Ammonia-Nitrogen and Phosphate Removal in Leachate using Algae and Bacteria Mixture

Kasmuri*,

Misni

2019

IJRTE

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Leachate is a liquid that has been produced by the waste especially organic waste. In an engineered sanitary landfill, biological treatment is a common practice to reduce the leachate contaminants. The effluent from treated leachate needs to comply with the standard set by the Department of Environment (DOE), Malaysia before it is being released into the river. The leachate contains a high number of contaminants such as ammonia-nitrogen, phosphorus, heavy metal, biochemical oxygen demand (BOD), chemical oxygen demand (COD) and suspended solids. This study focused on the possibility of treating leachate by using algae and bacteria in biological treatment in removing ammonia-nitrogen and phosphate in leachate obtained from Air Hitam Sanitary Landfill, Puchong. Initially, the characteristics of the leachate sample with in-situ and laboratory tests were analyzed to quantify the contaminants in the leachate. In this research, the concentration of leachate samples together with algae and bacteria was diluted in one (1) liter of distilled water varied between 10%, 30%, 50%, 80% and 100% (v/v) in each flask. Then, all the samples were aerated to ensure that the algae and bacteria were at the optimum condition to treat the contaminants in the leachate for all the respective flasks. The results of ammonia-nitrogen, phosphate, nitrite-nitrogen, and nitrate-nitrogen were taken for every 3 days for 15 days to determine the percentage of the removal due to the algae and bacteria uptake in the leachate for all the samples. After 15 days, the percentage of removal of the contaminants were analyzed using factorial design. It showed that 50% (v/v) of leachate concentration in the diluted flask exhibits the highest removal percentage of ammonia-nitrogen with 96.95% ammonia-nitrogen being removed from the leachate. For phosphorus, 10% (v/v) diluted leachate concentration marked highest which is 94.92% has been removed from the leachate. Finally, the regression equation was established to predict the rate of ammonia-nitrogen removal.

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Effect of environmental factors on the biomass and lipid production of microalgae grown in wastewaters

Cited by 28 publications

References 28 publications

Biomass productivity of Chlorella vulgaris cultivated in fish and dairy cattle wastewaters

Biomass productivity of Chlorella vulgaris cultivated in fish and dairy cattle wastewaters

Continuous 3-year outdoor operation of a flat-panel membrane photobioreactor to treat effluent from an anaerobic membrane bioreactor

Ammonia-Nitrogen and Phosphate Removal in Leachate using Algae and Bacteria Mixture

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