Reduction of water and energy requirement of algae cultivation using an algae biofilm photobioreactor

Özkan, Aysun; Kinney, Kerry A.; Katz, Lynn E.; Berberoğlu, Halil

doi:10.1016/j.biortech.2012.03.055

Cited by 294 publications

(150 citation statements)

References 31 publications

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“…For example, Ozkan et al (2012) showed that 1,618 and 2,857 L of water are required to produce 1 kg of biomass in a biofilm PBR and an open pond system, respectively. Moreover, according to Jorquera et al (2010), for conventional open ponds and flatplat photobioreactors, ca.…”

Section: Discussionmentioning

confidence: 99%

“…60 mL of water was lost by evaporation every 24 h. This water loss could be greatly reduced if the reactors were better sealed and if the inlet gas was saturated prior injecting into the chamber. Accordingly, it is estimated that the algal cells potentially can be grown in attached cultivated with <2.0 L of aqueous medium per 1 m 2 cultivation surface, which is only a tiny fraction of the medium volume of conventional open ponds as well as other unsealed single layer biofilm bioreactors (Ozkan et al 2012). There is a big gap between this potential of <2.0 L m −2 and the "suggested" medium volume of ca.…”

Section: Discussionmentioning

confidence: 99%

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An applicable nitrogen supply strategy for attached cultivation of Aucutodesmus obliquus

Wang

Zhang

et al. 2013

J Appl Phycol

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The "attached cultivation" method of microalgae in which the wet paste of algal biomass is attached onto supporting materials to form an immobilized biofilm layer, and the culture medium is supplied to this layer to provide nutrients and moisture for growth was highly efficient in biomass production and represents a promising technology to improve the biofuel industry. To optimize the nitrogen supply strategy for this attached cultivation method, the growth and total lipids accumulation properties for the green alga Aucutodesmus obliquus with this method were studied under different quantities of nitrogen source and different volumes of aqueous medium that continuously circulated inside the photobioreactor. Results showed that, compared with medium volume, the nitrogen quantity was a stronger factor affecting the growth and total lipid accumulation. An optimized nitrogen supply strategy for the attached cultivation of A. obliquus is proposed as circulating ca. 60 L of BG-11 medium containing 1/10 of nitrate concentration for 1 m 2 of cultivation surface. With this strategy, the attached A. obliquus accumulated biomass and total lipids simultaneously and obtained a high triacylglyceride productivity of 2.53 g m Dissolving the nitrogen source in small volume was the best way to efficiently utilize the nitrogen source with minimum of waste.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

An applicable nitrogen supply strategy for attached cultivation of Aucutodesmus obliquus

Wang

Zhang

et al. 2013

J Appl Phycol

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show abstract

“…A biomass density of 25.65 g m -2 and a biomass productivity of 2.57 g m -2 day -1 were achieved, respectively. Ozkan et al [21] reported a carpet-like PBR for the cultivation of B. braunii. These studies proved that the biofilm cultivation system was long-term stable and basically contamination free and characterized by a low overall energy consumption.…”

Section: Introductionmentioning

confidence: 99%

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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“…On the other hand, the surface should promote primary algal attachment and biofilm formation and reformation after each harvesting. Numerous materials have been used so far in the biofilm reactors described before, including glass, different plastic materials, metal meshes, cotton based ropes and textiles, printing paper, concrete and filter materials [52,55,[61][62][63]68,69].…”

Section: Biofilm Based Photobioreactorsmentioning

confidence: 99%

“…Among the beneficial characteristics of biofilm based PBRs, the immobilization of cells and thus their separation from water bodies are one of the major ones. By the numerous setup designs and constructions of biofilm-based photobioreactors, biomass density is reported in the range of 37-200 g dry weight kg -1 wet weight [50,62,66,68].…”

Section: Biomass Density Of Harvested Biofilmmentioning

confidence: 99%

Biotechnological potential of an isolated and a known green microalgal strain and their cultivation in biofilm based reactors

Sebestyén¹

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Reduction of water and energy requirement of algae cultivation using an algae biofilm photobioreactor

Cited by 294 publications

References 31 publications

An applicable nitrogen supply strategy for attached cultivation of Aucutodesmus obliquus

An applicable nitrogen supply strategy for attached cultivation of Aucutodesmus obliquus

Biofilm cultivation of the oleaginous microalgae Pseudochlorococcum sp.

Biotechnological potential of an isolated and a known green microalgal strain and their cultivation in biofilm based reactors

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