Removal of nitrogen and phosphorus from wastewater using microalgae immobilized on twin layers: an experimental study

Shi, Jianghong; Podola, Björn; Melkonian, Michael

doi:10.1007/s10811-006-9148-1

Cited by 331 publications

(149 citation statements)

References 30 publications

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“…In the range of light intensity from 10 to 100 lmol m -2 s -1 , the growth rate almost linearly increased to about 6 g m -2 day -1 with the increase of light intensity. This growth is much greater than that in Johnson and Wen [20], Shi et al [15] and Shen et al [25]. Beyond 100 lmol m -2 s -1 , the biofilm growth rate was maintained to be almost the same.…”

Section: The Effect Of Light Intensitymentioning

confidence: 63%

“…Some similar cultivation methods investigated by other research groups showed potential advantages in effluent treatments, biomass accumulation, and harvest. Shi et al [15] proposed a twinlayer system to cultivate Chlorella vulgaris and Scenedesmus rubescens for the efficient removal of nitrates, phosphates and ammonium from municipal wastewater. Mulbry et al [16] set up a pilot-scale algal turf scrubber raceway to remove COD and BOD by using filamentous green algae grown in outdoor raceways at different loading rates of raw and anaerobically digested dairy manure effluent.…”

Section: Introductionmentioning

confidence: 99%

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Biofilm cultivation of the oleaginous microalgae Pseudochlorococcum sp.

Zhang

et al. 2013

Bioprocess Biosyst Eng

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The cultivation of microalgae in biofilm has been a potential way to overcome the shortcoming of conventional algal culture modes of open pond and photobioreactors in liquid suspension. However, the growth characteristics and related effect factors of the biofilm are still far from being understood. In this work, oleaginous microalgae species Pseudochlorococcum was cultured in an attached biofilm and influential factors on the growth rate of biofilm were investigated. The results showed that Pseudochlorococcum sp. preferred to accumulate more biomass on hydrophilic substrata than on hydrophobic one. The photon flux density of 100 lmol m -2 s -1 was its light saturation point. The optimal inoculum density was about 3-5 g m -2 . The appropriate concentrations of nitrogen, phosphorus in medium and CO 2 in aerated gas were determined as 8.8, 0.22 mmol L -1 and 1 %, respectively.

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Section: The Effect Of Light Intensitymentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Biofilm cultivation of the oleaginous microalgae Pseudochlorococcum sp.

Zhang

et al. 2013

Bioprocess Biosyst Eng

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“…As a result, many technologies are currently in place to remove excess P from wastewaters, among them biological methods using phototrophic periphyton is a subject of great concern (Boelee et al, 2011;Guzzon et al, 2008;Roeselers et al, 2008;Shi et al, 2007;Sukačová et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Phototrophic periphyton techniques combine phosphorous removal and recovery for sustainable salt-soil zone

Feng

et al. 2016

Science of The Total Environment

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• Phototrophic periphyton is effective in removing P (P o and P i ) from wastewaters.• Adsorption with physiochemical characteristic dominated P removal mechanism by periphyton.• The P within periphyton is mainly in forms of Labile-P and Ca-P.• The periphyton has vast potential application in recovering P for salt-soil zone The P (P i as KH 2 PO 4 and P o as ATP) removal processes by phototrophic periphyton were investigated by determining the removal kinetics, metal content (Ca, Mg, Al, Fe, Cu, and Zn) of the solution and P fractions (Labile-P, Fe/Al-P, Ca-P, and Res-P) within the periphyton. Results showed that the periphyton was able to remove completely both P i and P o after 48 h when periphyton content was greater than 0.2 g L −1 (dry weight). The difference between P i and P o removal was the conversion of P o into P i by the periphyton, after that the removal mechanism was similar. The P removal mechanism was mainly due to the adsorption on the surfaces of the periphyton, including two aspects: i) the adsorption of PO 4 3− onto metal salts such as calcium carbonate (~50%) and ii) complexation between PO 4 3− and metal cations such as Ca 2+ (~40%). However, this bio-adsorptional process was significantly influenced by the extracellular polymeric substance (EPS) of periphyton, water hardness, initial G R A P H I C A L A B S T R A C T a b s t r a c t a r t i c l e i n f oKeywords:Science of the Total Environment 568 (2016) 838-844Abbreviations: α, the initial adsorption rate (mg g −1 h −1 ); β, the desorption constant (g mg −1 ); m, mass of adsorbent (g); t, time (h); C, the constant of boundary layer effect; H, Shannon index; R, ideal gas constant (8.314 J mol −1 K −1 ); T, temperature (K); V, the volume of solutions (L); k 1 , pseudo-first-order kinetic model rate constant (h −1 ); k 2 , pseudosecond-order kinetic model rate constant (mg g −1 h −1 ); q e , the amount of P adsorbed onto the periphyton at equilibrium (mg g −1 ); q e,cal , the amount of P adsorbed onto the periphyton calculated by model at equilibrium (mg g −1 ); q m , the maximum adsorption capacity for the periphyton (mg g −1 ); q t , the amount of P adsorbed onto the periphyton at time t (mg g −1 ); C 0 , initial P concentration (mg L −1 ); K id , intraparticle rate constant (mg g −1 h -0.5 ); P i , inorganic phosphorus (mg L −1 ); P o , organic phosphorus (mg L −1 ); TP, the total phosphorus content (mg L −1 ); R 2 , linear regression coefficient; ANSW, artificial non-point source wastewater; ATP, disodium adenosine triphosphate (C 10 H 14 O 13 N 5 P 3 Na 2 ·3H 2 O); DW, dry weight of the periphyton (g); EPS, extracellular polymeric substance of the periphyton; PDW, pure distilled water.⁎ Contents lists available at ScienceDirectScience of the Total Environment j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i t o t e n v P concentration, temperature and light intensity. This study not only deepens the understanding of P biogeochemical process in aquatic ecosystem, but provides a potential biomaterial...

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“…17 For instance, utilization of immobilized Chlorella vulgaris and Scenedesmus rubescens on a membrane system to remove nitrate from municipal wastewater was found to be efficient. 18 In addition, Wang et al 19 showed that employing immobilized Scenedesmus in calcium alginate as algal sheets is efficient in removal of ammonia nitrogen and orthophosphate from municipal wastewater. There have been few studies on the use of immobilized algae to remove color from dye solutions.…”

Section: ■ Introductionmentioning

confidence: 99%

Microalgae Immobilized by Nanofibrous Web for Removal of Reactive Dyes from Wastewater

Keskin

Çelebioğlu²,

Uyar³

et al. 2015

Ind. Eng. Chem. Res.

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In this study, we have developed microalgae immobilized by polysulfone nanofibrous web (microalgae/PSU-NFW) for the removal of reactive dyes (Remazol Black 5 (RB5) and Reactive Blue 221 (RB221). Here, an electrospinning technique was used to produce polysulfone nanofibrous web (PSU-NFW) as a free-standing material on which microalgae Chlamydomona reinhardtii was immobilized on PSU-NFW. The decolorization capacities of microalgae/PSU-NFW were significantly higher than that of pristine PSU-NFW. The decolorization rate for RB5 was calculated as 72.97 ± 0.3% for microalgae/PSU-NFW, whereas it was 12.36 ± 0.3% for the pristine PSU-NFW. In the case of RB221 solution, decolorization rates were achieved as 30.2 ± 0.23 and 5.51 ± 0.4% for microalgae/PSU-NFW and pristine PSU-NFW, respectively. Reusability tests revealed that microalgae/PSU-NFW can be used in at least three successive decolorization steps in which the decolorization rate of the RB5 was found to be 51 ± 0.69% after the third reuse step. These results are promising and therefore suggest that microalgae/PSU-NFW could be applicable for the decolorization of dyes because of their versatility and reusability.

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Removal of nitrogen and phosphorus from wastewater using microalgae immobilized on twin layers: an experimental study

Cited by 331 publications

References 30 publications

Biofilm cultivation of the oleaginous microalgae Pseudochlorococcum sp.

Biofilm cultivation of the oleaginous microalgae Pseudochlorococcum sp.

Phototrophic periphyton techniques combine phosphorous removal and recovery for sustainable salt-soil zone

Microalgae Immobilized by Nanofibrous Web for Removal of Reactive Dyes from Wastewater

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