Long-term operation of high rate algal ponds for the bioremediation of piggery wastewaters at high loading rates

Godos, Ignacio de; Blanco, Saúl; García‐Encina, Pedro A.; Bécares, Eloy; Muñoz, Raúl

doi:10.1016/j.biortech.2009.04.016

Cited by 297 publications

(136 citation statements)

References 18 publications

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“…Likewise, the mixed microalgal consortium was obtained both from a 500-L outdoors HRAP treating diluted swine manure (de Godos et al, 2009) and the upper surface of the river Duero in Valladolid (Spain), respectively. Despite the identification of both bacterial and microalgal species was not conducted, this fact does not invalidate the validity of the fundamental outcomes of this study.…”

Section: Culture Conditions and Microorganismsmentioning

confidence: 99%

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: Culture Conditions and Microorganismsmentioning

confidence: 99%

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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“…One alternative to synthetic culture media is to use agro-industrial wastewater, which usually presents high N and P concentration (Riaño et al, 2012;Chisti, 2013;Hernández et al, 2013). Specifically, the use of microalgal for pig manure (PM) bioremediation has been widely studied, reaching high microalgal productivities in the range of 9-55 g volatile suspended solids /m −2 d −1 (Lundquist et al, 2010;Masojídek et al, 2011;Hernández et al, 2016) and removing organic matter, nutrients, pathogen and emerging pollutants (de Godos et al, 2009;Posadas et al, 2017;García et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Recovery of Protein Concentrates From Microalgal Biomass Grown in Manure for Fish Feed and Valorization of the By-Products Through Anaerobic Digestion

Hernández

Molinuevo-Salces

Riaño

et al. 2018

Front. Sustain. Food Syst.

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“…The direct discharge of wastewater generated from these restaurants and shops down the drain without treatment represents a huge environmental burden. The major effect of the improper disposal of untreated wastewater (especially those containing nitrates and phosphates) into natural water bodies is eutrophication [1,6,7,8]. In addition, the release of untreated wastewater leads to the accumulation of toxic products in the receiving water bodies with potentially serious consequences on the immediate ecological environment [2,9,10].…”

Section: Introductionmentioning

confidence: 99%

Potential Application of Urea and NPK 15:15:15 Fertilizers as Biostimulants in the Bioremediation of Domestic Wastewater

Amenaghawon¹,

Asegame²,

Obahiagbon³

2013

ENV

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The role of urea and NPK 15:15:15 fertilisers as biostimulants of microbes in the bioremediation of domestic wastewater was investigated in this study. Five samples of domestic wastewater supplemented with 10, 20, 40, 60 and 80 g/L of urea, NPK as well as a combination of both fertilisers and the control were monitored for bioremediation. The indicating parameters such as pH, Biochemical Oxygen Demand (BOD), and Dissolved Oxygen (DO) over a period of 5 weeks were used. The results obtained showed that there was a BOD reduction of 86.62, 85.24 and 86.85% for wastewater treated with urea, NPK and a combination of both respectively. Stimulation by the fertilisers improved the DO level by 76, 75 and 77.8% respectively for wastewater treated with urea, NPK and a combination of both respectively. Generally, the best results were obtained when both fertilisers were used together. The final values of pH, BOD and DO fell within the values of 6-9, 30 mg/L and 2 mg/L set by the Federal Environmental Protection Agency (FEPA). The results obtained indicate the effective use of urea and NPK fertilisers in stimulating the activity of microbes for bioremediation in wastewater.

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Long-term operation of high rate algal ponds for the bioremediation of piggery wastewaters at high loading rates

Cited by 297 publications

References 18 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

Recovery of Protein Concentrates From Microalgal Biomass Grown in Manure for Fish Feed and Valorization of the By-Products Through Anaerobic Digestion

Potential Application of Urea and NPK 15:15:15 Fertilizers as Biostimulants in the Bioremediation of Domestic Wastewater

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