On the nitrogen and phosphorus removal in algal photobioreactors

Termini, Ilaria Di; Prassone, Annalisa; Cattaneo, Claudia; Rovatti, Mauro

doi:10.1016/j.ecoleng.2011.01.006

Cited by 78 publications

(30 citation statements)

References 20 publications

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“…Both LWR and TWR were effective in removing NH 4 -N, yielding a 99.9 % removal. This is in agreement with other authors who have also reported more than 90 % of NH 4 -N reduction in wastewater-treating photobioreactors (Termini et al 2011;Riaño et al 2012). Because there was an increase in NO 3 -N concentration during the first 8 days of operation, it is safe to assume much of the ammonia was removed from the water by nitrification process.…”

Section: Discussionsupporting

confidence: 90%

Effect of lake water on algal biomass and microbial community structure in municipal wastewater-based lab-scale photobioreactors

Krustok

Truu

Odlare

et al. 2015

Appl Microbiol Biotechnol

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Photobioreactors are a novel environmental technology that can produce biofuels with the simultaneous removal of nutrients and pollutants from wastewaters. The aim of this study was to evaluate the effect of lake water inoculation on the production of algal biomass and phylogenetic and functional structure of the algal and bacterial communities in municipal wastewater-treating lab-scale photobioreactors. Inoculating the reactors with lake water had a significant benefit to the overall algal biomass growth and nutrient reduction in the reactors with wastewater and lake water (ratio 70/30 v/v). The metagenome-based survey showed that the most abundant algal phylum in these reactors was Chlorophyta with Scenedesmus being the most prominent genus. The most abundant bacterial phyla were Proteobacteria and Bacteroidetes with most dominant families being Sphingobacteriaceae, Cytophagaceae, Flavobacteriaceae, Comamonadaceae, Planctomycetaceae, Nocardiaceae and Nostocaceae. These photobioreactors were also effective in reducing the overall amount of pathogens in wastewater compared to reactors with wastewater/tap water mixture. Functional analysis of the photobioreactor metagenomes revealed an increase in relative abundance genes related to photosynthesis, synthesis of vitamins important for auxotrophic algae and decrease in virulence and nitrogen metabolism subsystems in lake water reactors. The results of the study indicate that adding lake water to the wastewater-based photobioreactor leads to an altered bacterial community phylogenetic and functional structure that could be linked to higher algal biomass production, as well as to enhanced nutrient and pathogen reduction in these reactors.

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Section: Discussionsupporting

confidence: 90%

Effect of lake water on algal biomass and microbial community structure in municipal wastewater-based lab-scale photobioreactors

Krustok

Truu

Odlare

et al. 2015

Appl Microbiol Biotechnol

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“…The results have been reached in the outdoor photo bioreactor was less satisfactory because of ambient condition instability and limiting nutrients concentration [20].…”

Section: -mentioning

confidence: 98%

Removal of nitrogen and phosphorus from wastewater using microalgae free cells in bath culture system

Rasoul‐Amini

Montazeri‐Najafabady

Shaker

et al. 2014

Biocatalysis and Agricultural Biotechnology

102

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“…However, the cost of algal growth and biomass harvesting is limiting the technology at large scale. It has been more apparent that High Rate Algal Ponds (HRAP) and microalgal biofilms [2] are allowing recovery of nutrients such as nitrate and phosphate from municipal wastewater [3] as well as toxic waste removal [4]. In this process, microalgae use the end products of bacterial metabolism (for example CO 2 and ammonia) and in turn, supply aerobic bacteria with the oxygen required for the degradation of organic compounds.…”

Section: Introductionmentioning

confidence: 99%

Self-sustainable electricity production from algae grown in a microbial fuel cell system

Gajda

Greenman

Melhuish

et al. 2015

Biomass and Bioenergy

178

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a b s t r a c tThis paper describes the potential for algal biomass production in conjunction with wastewater treatment and power generation within a fully biotic Microbial Fuel Cell (MFC). The anaerobic biofilm in the anodic half-cell is generating current, whereas the phototrophic biofilm on the cathode is providing the oxygen for the Oxygen Reduction Reaction (ORR) and forming biomass. The MFC is producing electricity with simultaneous biomass regeneration in the cathodic half-cell, which is dependent on the nutrient value of the anodic feedstock. Growth of algal biomass in the cathode was monitored, assessed and compared against the MFC power production (charge transfer), during this process. MFC generation of electricity activated the cation crossover for the formation of biomass, which has been harvested and reused as energy source in a closed loop system. It can be concluded that the nutrient reclamation and assimilation into new biomass increases the energy efficiency. This work is presenting a simple and selfsustainable MFC operation with minimal dependency on chemicals and an energy generation system utilising waste products and maximising energy turnover through an additional biomass recovery.

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On the nitrogen and phosphorus removal in algal photobioreactors

Cited by 78 publications

References 20 publications

Effect of lake water on algal biomass and microbial community structure in municipal wastewater-based lab-scale photobioreactors

Effect of lake water on algal biomass and microbial community structure in municipal wastewater-based lab-scale photobioreactors

Removal of nitrogen and phosphorus from wastewater using microalgae free cells in bath culture system

Self-sustainable electricity production from algae grown in a microbial fuel cell system

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