Assessing carbon and nitrogen removal in a novel anoxic–aerobic cyanobacterial–bacterial photobioreactor configuration with enhanced biomass sedimentation

Godos, Ignacio de; Vargas, Virginia A.; Guzmán, Héctor; Soto, Roberto; García, Blanca C.; Garcı́a, Pilar Garcı́a; Muñoz, Raúl

doi:10.1016/j.watres.2014.04.050

Cited by 65 publications

(50 citation statements)

References 20 publications

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“…Scenedesmus species is commonly found in HRAPs treating domestic WW [36] because of their tolerance to high nitrogen and organic matter concentrations [37][38]. This study suggests that biomass sedimentation and recycling can contribute to the enrichment of monoalgal microalgae species with good settling properties.…”

Section: Leptolyngbya Benthonica and Pseudanabaena Sp Were Gradually mentioning

confidence: 82%

“…Air was introduced during the dark period in order to maintain the dissolved O 2 concentration in the photobioreactor above non-limiting concentrations [13][14] ( Table 1). The temperature and magnetic agitation of the photobioreactor were maintained constant at 25±1°C and 320 rpm, respectively.…”

Section: Experimental Set-upmentioning

confidence: 99%

“…These short HRTs are required to make algal-bacterial processes competitive with activated sludge systems. The experimental design was based on the operational limitations identified in previous studies in this AA-ABPh configuration [13] [14]. The experiment was divided in three operational stages.…”

Section: Experimental Designmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced carbon, nitrogen and phosphorus removal from domestic wastewater in a novel anoxic-aerobic photobioreactor coupled with biogas upgrading

García

Alcántara

Blanco³

et al. 2017

Chemical Engineering Journal

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Section: Leptolyngbya Benthonica and Pseudanabaena Sp Were Gradually mentioning

confidence: 82%

Section: Experimental Set-upmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced carbon, nitrogen and phosphorus removal from domestic wastewater in a novel anoxic-aerobic photobioreactor coupled with biogas upgrading

García

Alcántara

Blanco³

et al. 2017

Chemical Engineering Journal

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“…NH + 4 in the water may be trapped by zeolite due to its ability to reversibly bind alkalineearth cations inside the framework structure of zeolite and can easily be exchanged by surrounding positive ions (Wen et al, 2006). NH + 4 in the sediment can also be removed via biological pathways coupling nitrification and denitrification (Sebilo et al, 2006;Avrahami et al, 2011;Godos et al, 2014). The increased nitrate concentration in Z and OZ treatments implied a possibility of nitrification on the zeolite biofilm.…”

Section: Geochemistry Characteristics Of Treatmentsmentioning

confidence: 99%

Clay Flocculation Effect on Microbial Community Composition in Water and Sediment

Chen

Pan

Shi

et al. 2018

Front. Environ. Sci.

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Clay-based flocculation techniques have been developed to mitigate harmful algal blooms; however, the potential ecological impacts on the microbial community are poorly understood. In this study, chemical measurements were combined with 16S rRNA sequencing to characterize the microbial community response to different flocculation techniques, including controls, clay flocculation, clay flocculation with zeolite, and clay flocculation with O 2 added zeolite capping. Sediment bacterial biomass measured by PLFA were not significantly altered by the various flocculation techniques used. However, 16S rRNA sequencing revealed differences in water microbial community structure between treatments with and without zeolite capping. The differences were related to significant reductions of total nitrogen (TN), total phosphorus (TP) and ammonia (NH + 4 ) concentration and increase of nitrate (NO − 3 ) concentration in zeolite and O 2 loaded zeolite capping. The relative abundance of ammonia oxidizing bacteria increased four-fold in zeolite capping microcosms, suggesting zeolite promoted absorbed ammonia removal in the benthic zone. Zeolite-capping promoted bacteria nitrogen cycling activities at the water-sediment interface. Potential pathogens that are usually adapted to eutrophic water bodies were reduced after clay flocculation. This study demonstrated clay flocculation did not decrease bacterial populations overall and may reduce regulatory indicators and pathogenic contaminants in water. Zeolite capping may also help prevent nutrients from being released back into the water thus preventing additional algal blooms. IMPORTANCEDespite the effectiveness of clay flocculation for removing harmful algal blooms as highlighted in numerous studies, the potential ecological impacts on the microbial community have rarely been investigated. Characterization of clay flocculation treated algal bloom water and sediment microbial community provides new insights into the ecological impacts of this algal bloom controlling technology.

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“…Recycling of algal biomass by using gravity settling cones is a simple and effective operational strategy to promote and maintain the dominance of readily settleable algae (Park et al 2011). Furthermore, the external recycling also allows the decoupling between hydraulic retention time (HRT) and sludge retention time (SRT), which further avoid the washout of nitrifying bacteria and supports process operation at high biomass concentrations (de Godos et al 2014). Comparison of biomass productivity, nitrogen and phosphorus removal rates of microalgae in high rate algal ponds (HRAPs) is presented in Table 4.…”

Section: Gravity Settling Conesmentioning

confidence: 99%

Integration of microalgal cultivation system for wastewater remediation and sustainable biomass production

Gupta

Lee

Choi

2016

World J Microbiol Biotechnol

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Untreated wastewaters have been a great concern and can cause major pollution problems for environment. Conventional approaches for treating wastewater involve tremendous capital cost, have major short comings and are not sustainable. Microalgae culture offers an interesting step for wastewater treatment. Microalgae serve the dual purpose of phycoremediation along with the production of potentially valuable biomass, which can be used for several purposes. The ability of microalgae to accumulate nitrogen, phosphorus, heavy metals and other toxic compounds can be integrated with wastewater treatment system to offer an elegant solution towards tertiary and quaternary treatment. The current review explores possible role of microalgal based wastewater treatment and explores the current progress, key challenges, limitations and future prospects with special emphasis on strategies involved in harvesting, boosting biomass and lipid yield.

show abstract

Assessing carbon and nitrogen removal in a novel anoxic–aerobic cyanobacterial–bacterial photobioreactor configuration with enhanced biomass sedimentation

Cited by 65 publications

References 20 publications

Enhanced carbon, nitrogen and phosphorus removal from domestic wastewater in a novel anoxic-aerobic photobioreactor coupled with biogas upgrading

Enhanced carbon, nitrogen and phosphorus removal from domestic wastewater in a novel anoxic-aerobic photobioreactor coupled with biogas upgrading

Clay Flocculation Effect on Microbial Community Composition in Water and Sediment

Integration of microalgal cultivation system for wastewater remediation and sustainable biomass production

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