Biological treatment of industrial wastes in a photobioreactor

Tamer, Essam; Amin, Magdi; Ossama, El Tayeb; Mattìasson, Bo; Benoit, Gaboury

doi:10.2166/wst.2006.344

Cited by 33 publications

(10 citation statements)

References 11 publications

(17 reference statements)

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“…Furthermore, the absence of significant methane and methanol degradation confirmed that microalgal activity is not capable of supporting the complete biodegradation of organic pollutants with very low CORS in the absence of bicarbonate. The results obtained by Tamer et al (2006) confirmed this hypothesis. These authors recorded an increase in the continuous degradation of phenol (CORS=−0.67) by a Chlorella vulgaris and Alcaligenes sp.…”

Section: Influence Of the Cors On Pollutant Degradationsupporting

confidence: 70%

Assessing the influence of the carbon oxidation-reduction state on organic pollutant biodegradation in algal–bacterial photobioreactors

Bahr

Stams

Rosa

et al. 2011

Appl Microbiol Biotechnol

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The influence of the carbon oxidation-reduction state (CORS) of organic pollutants on their biodegradation in enclosed algal-bacterial photobioreactors was evaluated using a consortium of enriched wild-type methanotrophic bacteria and microalgae. Methane, methanol and glucose (with CORS −4, −2 and 0, respectively) were chosen as model organic pollutants. In the absence of external oxygen supply, microalgal photosynthesis was not capable of supporting a significant methane and methanol biodegradation due to their high oxygen demands per carbon unit, while glucose was fully oxidized by photosynthetic oxygenation. When bicarbonate was added, removal efficiencies of 37±4% (20 days), 65±4% (11 days) and 100% (2 days) were recorded for CH 4, CH 3 OH and C 6 H 12 O 6 , respectively due to the additional oxygen generated from photosynthetic bicarbonate assimilation. The use of NO 3 − instead of NH 4 + as nitrogen source (N oxidation-reduction state of +5 vs. −3) resulted in an increase in CH 4 degradation from 0 to 33±3% in the absence of bicarbonate and from 37±4% to 100% in the presence of bicarbonate, likely due to a decrease in the stoichiometric oxygen requirements and the higher photosynthetic oxygen production. Hypothetically, the CORS of the substrates might affect the CORS of the microalgal biomass composition (higher lipid content). However, the total lipid content of the algal-bacterial biomass was 19±7% in the absence and 16±2% in the presence of bicarbonate.

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Section: Influence Of the Cors On Pollutant Degradationsupporting

confidence: 70%

Assessing the influence of the carbon oxidation-reduction state on organic pollutant biodegradation in algal–bacterial photobioreactors

Bahr

Stams

Rosa

et al. 2011

Appl Microbiol Biotechnol

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“…10,52 This can be managed by using appropriate pretreatment technologies to remove sediment and to deactivate (sterilize) the wastewater. 53 …”

Section: Microalgal Farming Using Wastewatermentioning

confidence: 99%

Biofuels from Microalgae

Horsman

et al. 2008

Biotechnology Progress

942

397

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Microalgae are a diverse group of prokaryotic and eukaryotic photosynthetic microorganisms that grow rapidly due to their simple structure. They can potentially be employed for the production of biofuels in an economically effective and environmentally sustainable manner. Microalgae have been investigated for the production of a number of different biofuels including biodiesel, bio-oil, bio-syngas, and bio-hydrogen. The production of these biofuels can be coupled with flue gas CO 2 mitigation, wastewater treatment, and the production of high-value chemicals. Microalgal farming can also be carried out with seawater using marine microalgal species as the producers. Developments in microalgal cultivation and downstream processing (e.g., harvesting, drying, and thermochemical processing) are expected to further enhance the costeffectiveness of the biofuel from microalgae strategy.

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“…Synthetic wastewater NH 4 -N -45 [108] C. vulgaris Azospirillum brasilense Synthetic wastewater P -31.5 N -22 [109] C. sorokiniana Activated sludge consortium Pretreated swine slurry N -94 -100 P -70 -90 [60] C. sorokiniana Activated sludge bacteria Piggery wastewater P -54 NH 4 + -N -21 [110] Chroococcus spp., Lyngbya spp.…”

Section: Algae-bacteria Associationmentioning

confidence: 99%

Ecobiological aspects of algae cultivation in wastewaters for recycling of nutrients and biofuel applications

Chinnasamy¹,

Sood

Renuka

et al. 2014

Biofuels

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Algae-based wastewater treatment is an ecofriendly option, which involves complex interactions among the micro/macro flora and fauna. The use of consortia (algal polycultures, algae-bacteria/algae-fungi consortia and biofilms/mats) for wastewater treatment has proved more effective in nutrient recycling, bioremediation and biomass production. The present review focuses on ecobiological aspects of wastewaters, the interactions among the biotic components in natural and engineered aquatic systems, nutrient recycling, and the potential of algae-based wastewater treatment technologies for algae biomass and biofuel production. Although wastewater treatment coupled with production of biofuels is a promising option, concerted research efforts are needed in the future to develop commercial-scale technologies for biofuel production from algae cultivated in wastewaters.

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Biological treatment of industrial wastes in a photobioreactor

Cited by 33 publications

References 11 publications

Assessing the influence of the carbon oxidation-reduction state on organic pollutant biodegradation in algal–bacterial photobioreactors

Assessing the influence of the carbon oxidation-reduction state on organic pollutant biodegradation in algal–bacterial photobioreactors

Biofuels from Microalgae

Ecobiological aspects of algae cultivation in wastewaters for recycling of nutrients and biofuel applications

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