Changes in physico-chemical parameters and photosynthetic microorganisms in a deep wastewater self-depuration lagoon

Soler, Antonio; Sáez, J.; Lloréns, Mercedes; Martínez, I.; Torrella, F.; Berná, Luis Miguel

doi:10.1016/0043-1354(91)90044-q

Cited by 26 publications

(5 citation statements)

References 10 publications

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“…The implication of this is that with the addition of L. paucicostata, almost all the organic compounds in the wastewater were oxidized. Increase in TSS result agrees with the findings of Solar et al (1991) who studied temporal changes in physicochemical parameters and photosynthetic microorganisms in a selfdepuration wastewater lagoon, where some phytoplankton including microalgae played important role in the biotreatment or stabilization.…”

Section: Discussionsupporting

confidence: 89%

Bioremediation Potential of Duckweed (Lemna paucicostata) on Wastewater from a Mechanic Workshop, Port Harcourt, Nigeria

K.,

I.K.E.

2023

African Journal of Environment and Natural Science Research

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Wastewater pollution and its bioremediation remain a major challenge in urban areas. Lemna paucicostata were exposed to wastewater containing some amount of used engine oil in a four-week relative static bioassay. The physicochemical characteristics of the wastewater were determined using standard methods. The results obtained from the experiment showed that L. paucicostata was able to purify and concentrate nutrients from the wastewater. The efficacy of purification was manifested in the results where the total hydrocarbon content reduced from 8.15% - 4.00% over the period. Turbidity also reduced from 66.7% - 23.08%; biochemical oxygen demand reduced from 70.00% - 14.29%. Phosphate and nitrate also reduced from 34.59% - 12.09% and 39.74% - 11.92%, respectively. Chemical oxygen demand and total suspended solids increased from 22.92% - 73.16% and 2.90% - 14.39% respectively, over the periods. The temperature slightly changed from 29.3oC to 29.5oC. The pH also changed slightly from 7.00 – 7.50, making the wastewater slightly alkaline. Slightly alkaline conditions enhance overall hydrocarbon biodegradation in wastewater. However, prolonged exposure of L. paucicostata led to its mortality especially in the higher concentrations of hydrocarbons. Percentage mortality increased with concentrations and period of exposure, from 10% to 60% at the 3rd week and from 20% to 80% at the 4th week. Lethal concentration (LC50) of 14.60ppm was noticed at the 3rd week, while LC50 of 12.60ppm was noticed at the 4th week. The effectiveness of this algae, L. paucicostata, on the bioremediation of wastewater is not only of scientific but also of economic and social importance.

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Section: Discussionsupporting

confidence: 89%

Bioremediation Potential of Duckweed (Lemna paucicostata) on Wastewater from a Mechanic Workshop, Port Harcourt, Nigeria

K.,

I.K.E.

2023

African Journal of Environment and Natural Science Research

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“…The rate of oxygen utilization can be used to measure the total metabolism in the ponds. Algae play a key role in wastewater stabilization ponds because of oxygen generation through photosynthesis (Curtis et al, 1994;Soler et al, 1991). For the Harris ponds this was also documented by Helgen (1992), Buddhavarapu (1992), and Rockne (1992).…”

Section: Dissolved Oxygen and Phmentioning

confidence: 87%

WATER QUALITY STRATIFICATION IN SHALLOW WASTEWATER STABILIZATION PONDS¹

Luck

Stefan

1996

J American Water Resour Assoc

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The physical limnology of three modern wastewater stabilization ponds serving a small community in Minnesota was investigated over a 1‐year period (July 1989 ‐ October 1990). Water temperatures and associated meteorological parameters were recorded continuously; underwater light, dissolved oxygen, pH, and Secchi depth were measured intermittently (about weekly). Measurements of nutrients and planktonic species were made by other investigators. Water quality stratification dynamics were studied by analyzing variations of water temperature, dissolved oxygen, and pH distributions with time and over depth. Intermittent stratification and mixing of the shallow waste stabilization ponds (1–2 m deep) were documented and related to weather. The strong response of the ponds to seasonal and daily weather variations was observed. Three types of pond stratification conditions have been identified: (1) completely mixed during consecutive day and night, (2) stratified during the day and well‐mixed during the night, and (3) continuously stratified during day and night. A diurnal cycle of stratification dynamics was first noticed in late April and persisted through summer and into fall. Differences in light attenuation and hence temperature stratification and DO distribution between pond 1 (primary), pond 2 (second primary) and pond 3 (secondary) in the wastewater treatment system were documented and related to different waste loading conditions. Temperature stratification affects chemical, microbial, and planktonic processes in the ponds. Results presented in this paper can be used to provide guidance for water quality sampling in monitoring of pond performance. Information on true mixing conditions is also needed to gain better understanding of important factors affecting pond operation, and for process simulations and reactor modeling of waste stabilization ponds.

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“…Both genera appear to produce sufficient lipids (15 to 25 percent) to be of some interest to algal biofuel production (Waygood et al, 1980;Morowvat et al, 2010). Wastewater ponds are well known to produce intense blooms of these genera (Singh and Saxena, 1969;Haughey, 1970;Eren, 1977;Waygood et al, 1980;Irving and Dromgoole, 1986;Wrigley and Toerien, 1990;Soler et al, 1991;Almasi and Pescod, 1996). Large-scale mixotrophic culture of any genera is unproven, but offers a potential means of eliminating the parasitic energy losses of carbonation in algae energy production.…”

Section: Alternative 3 -High Rate Algae Ponds With Cell Production Comentioning

confidence: 99%

Energy Balance, Utilisation of Nutrients, and Uptake of Metals for Wastewater for Algae to Energy Production: An Algal Bioenergy Technology Assessment

Baxter¹,

Elsum²,

Poon³

et al. 2011

proc water environ fed

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Keywords: Algal bioenergy, wastewater, water utility, zero net greenhouse gas emissions, nutrient and metals uptake and fate. ABSTRACTMelbourne Water has developed a Greenhouse and Energy Strategy (GES) to achieve its stated organisational goals of being zero net greenhouse gas emissions by 2018 and boost the use or export of renewable energy to 100% of total energy used by 2018. An engineering analysis was conducted to determine feasibility of algal energy production at its facilities. Proven methods of algae biomass production, harvesting, and energy extraction were chosen for this analysis for methane and biofuels production. Analyses produced negative energy balances for proven technologies because of large parasitic energy demands inherent at various stages of the process. In all cases carbonation of water with CO 2 for autotrophic algae production was a large parasitic energy demand. Biofuel production requires heat for drying of biomass, which was also a large energy demand. Although somewhat speculative, mixotrophic production of methane appears to offer an opportunity to achieve a positive energy balance. INTRODUCTIONMelbourne Water has developed a Greenhouse and Energy Strategy (GES) to achieve its stated organisational goals of being zero net greenhouse gas emissions by 2018 and boost the use or export of renewable energy to 100% of total energy used by 2018. As part of this effort, this study investigates the technical feasibility of utilising the nutrients in wastewater to produce large-scale amounts of algae for the purposes of energy production.

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Changes in physico-chemical parameters and photosynthetic microorganisms in a deep wastewater self-depuration lagoon

Cited by 26 publications

References 10 publications

Bioremediation Potential of Duckweed (Lemna paucicostata) on Wastewater from a Mechanic Workshop, Port Harcourt, Nigeria

Bioremediation Potential of Duckweed (Lemna paucicostata) on Wastewater from a Mechanic Workshop, Port Harcourt, Nigeria

WATER QUALITY STRATIFICATION IN SHALLOW WASTEWATER STABILIZATION PONDS¹

Energy Balance, Utilisation of Nutrients, and Uptake of Metals for Wastewater for Algae to Energy Production: An Algal Bioenergy Technology Assessment

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Changes in physico-chemical parameters and photosynthetic microorganisms in a deep wastewater self-depuration lagoon

Cited by 26 publications

References 10 publications

Bioremediation Potential of Duckweed (Lemna paucicostata) on Wastewater from a Mechanic Workshop, Port Harcourt, Nigeria

Bioremediation Potential of Duckweed (Lemna paucicostata) on Wastewater from a Mechanic Workshop, Port Harcourt, Nigeria

WATER QUALITY STRATIFICATION IN SHALLOW WASTEWATER STABILIZATION PONDS1

Energy Balance, Utilisation of Nutrients, and Uptake of Metals for Wastewater for Algae to Energy Production: An Algal Bioenergy Technology Assessment

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WATER QUALITY STRATIFICATION IN SHALLOW WASTEWATER STABILIZATION PONDS¹