Long term diurnal variations in contaminant removal in high rate ponds treating urban wastewater

García, Joan; Green, B.F.; Lundquist, Tryg; Mujeriego, Rafael; Hernández-Mariné, Mariona; Oswald, William J.

doi:10.1016/j.biortech.2005.07.019

Cited by 194 publications

(120 citation statements)

References 12 publications

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“…If the higher temperature of our tanks is related to higher productivity, this suggests that warm locations such as Houston might be especially suitable for Table 1. The effects of experimental treatments on physical parameters of water, zooplankton abundance, and production of mass, lipids, and FAME to increase total lipid content in many algal species (Pulz and Gross 2004, García et al 2006, Elser et al 2007). In addition, nitrogen availability is a major factor determining the algal lipid class composition (Tedesco and Duerr 1989, Gordillo et al 1998, Alonso et al 2000.…”

Section: Discussionmentioning

confidence: 99%

Low algal diversity systems are a promising method for biodiesel production in wastewater fed open reactors

Bhattacharjee¹,

Siemann²

2015

ALGAE

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Planktivorous fish which limit zooplankton grazing have been predicted to increase algal biodiesel production in wastewater fed open reactors. In addition, tanks with higher algal diversity have been predicted to be more stable, more productive, and to more fully remove nutrients from wastewater. To test these predictions, we conducted a 14-week experiment in Houston, TX using twelve 2,270-L open tanks continuously supplied with wastewater. Tanks received algal composition (monocultures or diverse assemblage) and trophic (fish or no fish) treatments in a full-factorial design. Monocultures produced more algal and fatty acid methyl ester (FAME) mass than diverse tanks. More than 80% of lipids were converted to FAME indicating potentially high production for conversion to biodiesel (up to 0.9 T ha -1 y -1). Prolific algal growth lowered temperature and levels of total dissolved solids in the tanks and increased pH and dissolved oxygen compared to supply water. Algae in the tanks removed 91% of nitrate-N and 53% of phosphorus from wastewater. Monocultures were not invaded by other algal species. Fish did not affect any variables. Our results indicated that algae can be grown in open tank bioreactors using wastewater as a nutrient source. The stable productivity of monocultures suggests that this may be a viable production method to procure algal biomass for biodiesel production.

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Section: Discussionmentioning

confidence: 99%

Low algal diversity systems are a promising method for biodiesel production in wastewater fed open reactors

Bhattacharjee¹,

Siemann²

2015

ALGAE

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“…Zulkifli (1992) concluded that the residence time was the predominant variable to the algal productivity, the long residence time presenting the lowest productivity of algal biomass. Garcia et al (2002) obtained algal productivity of 12.7 gTSS/m 2 /d to pond A and 14.8 gTSS/m 2 /d to pond B, both high rate algal ponds, with domestic effluent (COD total 170 mg/L) and this last pond presented higher productivity in relation to the short residence time (3 days). The coefficient of variation, CV-values, regulates the theoretically highest predictive power of models and the reliability of data used for the model validations.…”

Section: Ecologic Indexmentioning

confidence: 86%

Plankton biomass in secondary ponds treating piggery waste

Barthel

Oliveira

Costa

2008

Braz. arch. biol. technol.

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“…Moreover, HRAP are an effective system for phytoremediation, replacing conventional tertiary treatment nutrient removal, which has a cost four times higher than that of conventional primary treatment (Mesple et al, 1996;Olguin et al, 2004;Moreno-Garrido, 2008;Godos et al, 2009;Garcia et al, 2009). The main advantages of this treatment are that microalgal photosynthesis releases oxygen and there is no need for mechanical aeration because the microbial degradation of organic matter is heterotrophic.…”

Section: Microalgaementioning

confidence: 99%

Algae of economic importance that accumulate cadmium and lead: a review

Souza¹,

Ferreira²,

Pires³

et al. 2012

Rev. bras. farmacogn.

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Currently, algae and algae products are extensively applied in the pharmaceutical, cosmetic and food industries. Algae are the main organisms that take up and store heavy metals. Therefore, the use of compounds derived from algae by the pharmaceutical industry should be closely monitored for possible contamination. The pollution generated by heavy metals released by industrial and domestic sources causes serious changes in the aquatic ecosystem, resulting in a loss of biological diversity and a magnifi cation and bioaccumulation of toxic agents in the food chain. Since algae are at the bottom of the aquatic food chain, they are the most important vector for transfer of pollution to upper levels of the trophic chain in aquatic environments. Moreover, microalgae are also used for the bioremediation of wastewater, a process that does not produce secondary pollution, that enables effi cient recycling of nutrients and that generates biomass useful for the production of bioactive compounds and biofuel.

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Long term diurnal variations in contaminant removal in high rate ponds treating urban wastewater

Cited by 194 publications

References 12 publications

Low algal diversity systems are a promising method for biodiesel production in wastewater fed open reactors

Low algal diversity systems are a promising method for biodiesel production in wastewater fed open reactors

Plankton biomass in secondary ponds treating piggery waste

Algae of economic importance that accumulate cadmium and lead: a review

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