Water resource recovery by means of microalgae cultivation in outdoor photobioreactors using the effluent from an anaerobic membrane bioreactor fed with pre-treated sewage

Viruela, Alexandre; Murgui, Mónica; Gómez-Gil, Tao; Durán, Freddy; Robles, Ángel; Ruano, M.V.; Ferrer, J.; Seco, A.

doi:10.1016/j.biortech.2016.06.116

Cited by 56 publications

(27 citation statements)

References 31 publications

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“…The high rP in the CO 2 +P reactor could simply be explained by the larger availability of P. [34][35][36][37][38] Figure 6 summarizes the mixed model results of TSS, rNH 4 , rNO 3 , rNO 2 and rTSS, as well as Table 3. The results confirmed, as in Figs 5 and 6, that limited variations of the HRT value (±20%) did not significantly affect biomass production or N removal rate, in agreement with Viruela et al 39 In the tested conditions, only the addition of CO 2 had a positive effect on rTSS and rNH 4 . The addition of P, at the applied rate, did not provide any further, significant benefit.…”

Section: As Shown Insupporting

confidence: 91%

Lab‐scale testing of operation parameters for algae based treatment of piggery wastewater

Marazzi

Bellucci

Fornaroli

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Microalgae–bacteria‐based processes are among the most promising low‐cost technologies to treat livestock wastewaters. The current literature reports the need for pretreatment or dilution of piggery wastewater for adequate microalgal growth. The aim of this study is to optimize the potential of microalgal–bacterial communities to treat undiluted and untreated piggery wastewater by investigating the influence of some operational parameters such as phosphorus and CO2 availability and hydraulic retention time on the nitrogen removal efficiency and biomass productivity. RESULTS The microalgal community (dominated by Chlorella spp.) developed quickly and remained quite stable. The rates of biomass production and NH4‐N removal were 55 ± 30 mg TSS L−1 day−1 and 13 ± 3 mg NH4‐N L−1 day−1 respectively. CO2 adjustment had a positive effect on microalgal growth and NH4‐N removal. CONCLUSION Data confirm the ability of the microalgal–bacterial consortium to grow on undiluted and untreated piggery wastewater under semi‐continuous conditions. Synergy between algae and bacteria seems positive since photosynthesis produces the oxygen needed for ammonia oxidation. © 2019 Society of Chemical Industry

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Section: As Shown Insupporting

confidence: 91%

Lab‐scale testing of operation parameters for algae based treatment of piggery wastewater

Marazzi

Bellucci

Fornaroli

et al. 2019

J of Chemical Tech & Biotech

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“…As a bioremediation technique, microalgae was cultivated in a Membrane PhotoBioReactor pilot plant (MPBR) in order to remove nutrients from the effluent of an AnMBR pilot plant, as 5 previously described by Viruela et al [7]. This microalgal biomass, mainly composed of Scenedesmus spp.…”

Section: Microalgal Feedstockmentioning

confidence: 99%

“…This microalgal biomass, mainly composed of Scenedesmus spp. [7], was concentrated by filtration before being fed to two laboratory-scale reactors, a mesophilic AnMBR and a thermophilic CSTR, according to the OLR described for each reactor in the next sections. Scenedesmus biomass was concentrated by filtration using an external cross-flow, ultrafiltration hollow fibre membrane system (HF 5.0-43-PM500, PURON ® Koch Membrane Systems), which has a surface area of 2.1 m 2 and a nominal pore size of 500 kDa MWCO (Molecular Weight Cut-Off).…”

Section: Microalgal Feedstockmentioning

confidence: 99%

“…Microalgae exhibit several characteristics that make them a promising biomass resource such as a high photosynthetic efficiency, a growth rate of 20-30 fold higher than energy crops and no direct competition with food production since microalgae could be grown on non-arable land [6]. However, the use of wastewater streams to cultivate microalgal biomass typically results in the growth of specific strains such as Scenedesmus [7], which possesses a rigid cell-wall. This cell-wall is composed of cellulose, hemicellulose and lignin [6,8] and is highly resistant to biological degradation [9].…”

Section: Introductionmentioning

confidence: 99%

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ElsevierGreses-Huerta, S.; Gaby, JC. ; Aguado García, D.;Ferrer, J.; Seco Torrecillas, A.; Horn, SJ. (2017).

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Microbial community characterization during anaerobic digestion of Scenedesmus spp. under mesophilic and thermophilic conditions

et al. 2017

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ElsevierGreses-Huerta, S.; Gaby, JC.; Aguado García, D.;Ferrer, J.; Seco Torrecillas, A.; Horn, SJ. (2017). Microbial community characterization during anaerobic digestion of Scenedesmus spp. under mesophilic and thermophilic conditions. AbstractMicrobial communities were thoroughly characterized in a mesophilic anaerobic membrane bioreactor (AnMBR) and a thermophilic continuous stirred tank reactor (CSTR), which were both treating recalcitrant microalgal biomass dominated by Scenedesmus. 16S rRNA amplicon sequencing analysis was performed when the AnMBR achieved 70% algal biodegradation and revealed high microbial diversity, probably due to the high solid retention time (SRT) of the AnMBR configuration. The bacterial community consisted of Chloroflexi (27.9%), WWE1 (19.0%) and Proteobacteria (15.4%) as the major phyla, followed by Spirochaetes (7.7%), Bacteroidetes 2 (5.9%) and Firmicutes (3.6%). These phyla are known to exhibit proteolytic and cellulolytic capabilities required to degrade the Scenedesmus cell-wall. Methanosaeta was the most abundant methanogen detected in the AnMBR suggesting that methane was mainly produced by the acetoclastic pathway. In comparison, the thermophilic CSTR achieved 32.6% algal biodegradation, and its bacterial community had fewer Operational Taxonomic Units (977 OTUs) than the AnMBR (1396 OTUs), as is generally observed for high temperature biogas reactors. However, phyla with high hydrolytic potential were detected such as Firmicutes (34.6%) and the candidate taxon EM3 (38.7%) in the thermophilic CSTR. Although the functional metabolism of EM3 in anaerobic digesters is unknown, the high abundance of EM3 suggests that this taxon plays an important role in the thermophilic, anaerobic degradation of Scenedesmus. The abundant syntrophic bacteria and the detection of hydrogenotrophic methanogens in the thermophilic CSTR suggest that the hydrogenotrophic pathway was the dominant pathway for methane production in this reactor.

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Applications of Biotechnology in Seafood Production and Processing

Ranadheera

Prasanna

Vidanarachchi

2020

Encyclopedia of Marine Biotechnology

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Water resource recovery by means of microalgae cultivation in outdoor photobioreactors using the effluent from an anaerobic membrane bioreactor fed with pre-treated sewage

Cited by 56 publications

References 31 publications

Lab‐scale testing of operation parameters for algae based treatment of piggery wastewater

Lab‐scale testing of operation parameters for algae based treatment of piggery wastewater

Microbial community characterization during anaerobic digestion of Scenedesmus spp. under mesophilic and thermophilic conditions

Applications of Biotechnology in Seafood Production and Processing

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