Effectiveness mapping of open raceway pond and tubular photobioreactors for sustainable production of microalgae biofuel

Pawar, Sanjay B.

doi:10.1016/j.rser.2016.04.074

Cited by 60 publications

(15 citation statements)

References 138 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The industrial performance of microalgae by autotrophic cultivation is limited by cell concentration and light supply. Open ponds applying natural light is common option for mass cultivation, while the biomass is merely around 0.5 g L −1 [ 65 ]. Therefore, various designs of PBR have proposed to increase utilization of light.…”

Section: Approaches For Enhancing Biomass and Product Accumulation Mamentioning

confidence: 99%

See 1 more Smart Citation

High-value biomass from microalgae production platforms: strategies and progress based on carbon metabolism and energy conversion

Sun

Zhao

Mao

et al. 2018

Biotechnol Biofuels

106

View full text Add to dashboard Cite

Microalgae are capable of producing sustainable bioproducts and biofuels by using carbon dioxide or other carbon substances in various cultivation modes. It is of great significance to exploit microalgae for the economical viability of biofuels and the revenues from high-value bioproducts. However, the industrial performance of microalgae is still challenged with potential conflict between cost of microalgae cultivation and revenues from them, which is mainly ascribed to the lack of comprehensive understanding of carbon metabolism and energy conversion. In this review, we provide an overview of the recent advances in carbon and energy fluxes of light-dependent reaction, Calvin–Benson–Bassham cycle, tricarboxylic acid cycle, glycolysis pathway and processes of product biosynthesis in microalgae, with focus on the increased photosynthetic and carbon efficiencies. Recent strategies for the enhanced production of bioproducts and biofuels from microalgae are discussed in detail. Approaches to alter microbial physiology by controlling light, nutrient and other environmental conditions have the advantages of increasing biomass concentration and product yield through the efficient carbon conversion. Engineering strategies by regulating carbon partitioning and energy route are capable of improving the efficiencies of photosynthesis and carbon conversion, which consequently realize high-value biomass. The coordination of carbon and energy fluxes is emerging as the potential strategy to increase efficiency of carbon fixation and product biosynthesis. To achieve more desirable high-value products, coordination of multi-stage cultivation with engineering and stress-based strategies occupies significant positions in a long term.

show abstract

Section: Approaches For Enhancing Biomass and Product Accumulation Mamentioning

confidence: 99%

“…Therefore, various designs of PBR have proposed to increase utilization of light. The tubular bioreactor increases average biomass to 5 g L −1 than open raceway pond [ 65 ]. Sato et al [ 66 ] established a vertical column bioreactor for Fistulifera sp.…”

Section: Approaches For Enhancing Biomass and Product Accumulation Mamentioning

confidence: 99%

High-value biomass from microalgae production platforms: strategies and progress based on carbon metabolism and energy conversion

Sun

Zhao

Mao

et al. 2018

Biotechnol Biofuels

106

View full text Add to dashboard Cite

show abstract

“…During the last years, wastewater treatment systems based on microalgae have been investigated with great interest due to the high capability of microalgae to remove nutrients, heavy metals and bacteria (Muñoz et al, 2006;Abdel-Raouf et al, 2012). Indeed, microalgae can grow in low quality water, such as wastewaters, as these still contain high amounts of nutrients (N, P), essential for microalgae production (Pawar, 2016). The use of wastewater as feedstock for microalgae biomass growth leads to a dual benefit, as microalgae have proved to be highly efficient in removing these nutrients, producing clean water as a by-product, and at the same time the production of algal biomass increases; this biomass will be further processed and converted to bioenergy.…”

Section: Introductionmentioning

confidence: 99%

Use of full-scale hybrid horizontal tubular photobioreactors to process agricultural runoff

García-Galán

Gutiérrez

Uggetti

et al. 2018

Biosystems Engineering

View full text Add to dashboard Cite

Diffuse pollution in rural areas due to agricultural runoff is a widespread and difficult problem to address due to the large areas affected. Drainage channels receive polluted water, but its introduction into conventional treatment network is often unfeasible. Within this context, microalgae-based treatment systems could be used as alternative treatment plants. A new design of semi-closed (hybrid) tubular horizontal photobioreactor (HTH-PBR) with low energy requirements has been evaluated for microalgae cultivation at full-scale (8.5 m3), using agricultural runoff as feedstock. This novel system was tested in batch and continuous mode over 4 and 135 d. Considering a full-scale application in an agricultural context, a batch test was carried out to evaluate the performance of the system. An increase of 22% in the biomass concentration in 4 d was registered, and all nutrients were consumed during the first two days. In the continuous experiment carried out over winter (December–April), productivity was between 2 and 14 g g [TSS] m-3 d, but values up to 76.4 g [TSS] m-3 d were reached at the end of the study in spring, despite the low nutrients concentration in the feedstock. Elimination of emerging contaminants was also evaluated, obtaining the highest removals for the synthetic musk fragrances tonalide and galaxolide (73% and 68%), and the anti-inflammatory drug diclofenac (61%).Peer ReviewedPostprint (author's final draft

show abstract

“…So far, raceway ponds and tubular photobioreactors have been widely used to culture microalgae in a large scale [16, 17]. However, in these systems, temperature has to be maintained between 20 and 30 °C in order to obtain ideal microalgal growth and lipid accumulation because lower temperatures result in lower biomass.…”

Section: Introductionmentioning

confidence: 99%

Molasses wastewater treatment and lipid production at low temperature conditions by a microalgal mutant Scenedesmus sp. Z-4

Wen

Xing

et al. 2017

Biotechnol Biofuels

101

View full text Add to dashboard Cite

BackgroundSimultaneous wastewater treatment and lipid production by oleaginous microalgae show great potential to alleviate energy shortage and environmental pollution, because they exhibit tremendous advantages over traditional activated sludge. Currently, most research on wastewater treatment by microalgal are carried out at optimized temperature conditions (25–35 °C), but no information about simultaneous wastewater treatment and lipid production by microalgae at low temperatures has been reported. Microalgal growth and metabolism will be inhibited at low temperature conditions, and satisfactory wastewater treatment performance will be not obtained. Therefore, it is critical to domesticate and screen superior microalgal strains with low temperature adaptability, which is of great importance for wastewater treatment and biodiesel production.ResultsIn this work, simultaneous wastewater treatment and lipid production were achieved by a microalgal mutant Scenedesmus sp. Z-4 at the low temperature conditions (4, 10, and 15 °C). The results showed that algal growth was inhibited at 4, 10, and 15 °C compared to that at the optimal temperature of 25 °C. However, decreased temperature had no significant effect on the total cellular lipid content of algae. Importantly, lipid productivity at 10 °C was compromised by more net energy output relevant to biodiesel production, which demonstrated that the low temperature of 10 °C was favorable to wastewater treatment and energy recovery by Scenedesmus sp. Z-4. When molasses wastewater with optimal COD concentration of 8000 mg L−1, initial inoculation ratio of 15%, and C/N ratio of 15 was used to cultivate microalgae, the maximum removal rate of COD, TN, and TP at 10 °C reached 87.2, 90.5, and 88.6%, respectively. In addition, lipid content of 28.9% and lipid productivity of 94.4 mg L−1 day−1 were obtained.Conclusions Scenedesmus sp. Z-4 had good adaptability to low temperature conditions, and showed great potential to realize simultaneous wastewater treatment and lipid production at low temperatures. The proposed approach in the study was simple compared to other wastewater treatment methods, and this potential novel process was still efficient to remove COD, N, and P at low temperatures. Thus, it had a vital significance for the wastewater treatment in low temperature regions.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0797-x) contains supplementary material, which is available to authorized users.

show abstract

Effectiveness mapping of open raceway pond and tubular photobioreactors for sustainable production of microalgae biofuel

Cited by 60 publications

References 138 publications

High-value biomass from microalgae production platforms: strategies and progress based on carbon metabolism and energy conversion

High-value biomass from microalgae production platforms: strategies and progress based on carbon metabolism and energy conversion

Use of full-scale hybrid horizontal tubular photobioreactors to process agricultural runoff

Molasses wastewater treatment and lipid production at low temperature conditions by a microalgal mutant Scenedesmus sp. Z-4

Contact Info

Product

Resources

About