Treatment of recalcitrant wastewater from ethanol and citric acid production using the microalga Chlorella vulgaris and the macrophyte Lemna minuscula

Valderrama, Luz Teresa Valderrama; Campo, Claudia M Del; Rodríguez, Claudia María Orellana; Bashan, Luz E. de; Bashan, Yoav

doi:10.1016/s0043-1354(02)00143-4

Cited by 212 publications

(92 citation statements)

References 21 publications

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“…So far, there is almost no report on complete removal of PO 4 3− , the main form of inorganic phosphorus used by algae, from domestic wastewater by biological wastewater treatment with in vitro small-scale experiments [5,26]. The microalgal cells apparently became saturated fast with PO 4 3− [4,13,26], probably due to accumulation of polyphosphates [27].…”

Section: Discussionmentioning

confidence: 99%

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Starvation enhances phosphorus removal from wastewater by the microalga Chlorella spp. co-immobilized with Azospirillum brasilense

Hernández¹,

de‐Bashan²,

Bashan³

2006

Enzyme and Microbial Technology

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147

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In synthetic wastewater, growth and phosphorus absorption by two species of microalgae, Chlorella sorokiniana and Chlorella vulgaris, and in domestic wastewater by C. sorokiniana significantly enhanced after a starvation period of 3 days in saline solution, combined with co-immobilization with the microalgae growth-promoting bacterium (MGPB) Azospirillum brasilense Cd in alginate beads. Starvation of 5 days negatively affected the subsequent growth of C. vulgaris, but not of C. sorokiniana in fresh wastewater. Starvation of immobilized cultures of microalgae separately or microalgae with bacteria, followed by returning the immobilized cultures to the same wastewater did not enhance phosphorus absorption. However, a starvation period followed by subsequent submersion of the cultures in fresh wastewater allowed the continuation of phosphorus absorption. The best phosphorus removal treatment from a batch of synthetic or domestic wastewater was with tandem treatments of wastewater treatment with pre-starved, co-immobilized microalgae and replacement of this culture, after one cycle of phosphorus removal, with a new, similarly starved culture. This combination treatment with two cultures was capable of removing up to 72% of phosphorus from the wastewater. There was a direct correlation between the initial load of phosphorus in the domestic wastewater and the efficiency level of removal, being highest at higher phosphorus loads in coimmobilized cultures. This occurred for both immobilized and co-immobilized cultures. Further, the results showed that negative effects of starving the microalgae were mitigated by the application of the MGPB A. brasilense Cd. This is the first report of this capacity in Azospirillum sp. on a single-cell plant. This study showed that starvation periods, combined with co-immobilization with MGPB, have synergistic effects on absorption of phosphorus from wastewater and merits consideration in designing future biological treatments of wastewater.

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Section: Discussionmentioning

confidence: 99%

“…are commonly used for tertiary wastewater biological treatment [1][2][3][4]. Although nitrogenous compounds are commonly removed, removal of phosphorus, the second most important nutrient in domestic wastewater, is far less efficient.…”

Section: Introductionmentioning

confidence: 99%

Starvation enhances phosphorus removal from wastewater by the microalga Chlorella spp. co-immobilized with Azospirillum brasilense

Hernández¹,

de‐Bashan²,

Bashan³

2006

Enzyme and Microbial Technology

Self Cite

147

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Optimization of Environmental Parameters on Microbial Degradation of Reactive Black Dye

Shah¹,

Pate²

2013

J Bioremed Biodeg

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The study involved isolation of bacteria possessing high potential to degrade Reactive Black azo dye in liquid medium. Eighty four strains of bacteria were isolated through enrichment technique by using Reactive Black azo dye as the source of carbon and nitrogen in the mineral salt medium. Bacterial strains showing high decolorization rate were used to optimize the decolorization of Reactive Black azo dye in liquid culture. The optimum conditions determined for the four selected bacterial strains for decolorization of Reactive Black (250 mg L -1 ) were pH 7.0, temperature 32°C, when dye solution was supplemented with 0.5% yeast extract as a co-substrate. Out of these four strains, two strains ETL-1 (Klebsiella oxytoca) and ETL-2 (Bacillus subtillis) showed an excellent potential to decolorize 500 mg L -1 Reactive Black in 6 h in the liquid broth. Journal of Bior emediation & Biodegradation

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“…In recent years a number of studies have focused on some microorganisms capable of degrading and absorbing dyes from wastewater. A wide variety of microorganisms are reported to be capable of decolonization of dyes [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The current study has evaluated the potential of isolated bacterial strain from textile effluent for their decolorization efficiency of the textile dye, Remazol Black B under in vitro conditions and optimization of the factors influencing the process.…”

Section: Introductionmentioning

confidence: 99%

Microbial degradation of Textile Dye (Remazol Black B) by Bacillus spp. ETL-2012

Shah¹

2012

J Bioremed Biodeg

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Treatment of recalcitrant wastewater from ethanol and citric acid production using the microalga Chlorella vulgaris and the macrophyte Lemna minuscula

Cited by 212 publications

References 21 publications

Starvation enhances phosphorus removal from wastewater by the microalga Chlorella spp. co-immobilized with Azospirillum brasilense

Starvation enhances phosphorus removal from wastewater by the microalga Chlorella spp. co-immobilized with Azospirillum brasilense

Optimization of Environmental Parameters on Microbial Degradation of Reactive Black Dye

Microbial degradation of Textile Dye (Remazol Black B) by Bacillus spp. ETL-2012

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