Static supply of different simulated flue gases for native microalgae cultivation in diluted cow manure digestate

Al-Mallahi, Jumana; Ishii, Kazuei; Sato, Masahiro; Ochiai, Satoru

doi:10.1016/j.jenvman.2023.117557

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…However, in these conditions, the growth rate of microalgae is always inhibited, which finally results in low lipid production. The significant increase in lipid productivity with digestate addition is consistent with previous studies on microalgae cultivation using wasted organics sources, such as cow manure digestate [38], garden waste [21] and food waste [33]. Therefore, anaerobic digestate of food wastewater from an AnMBR can be utilized as a promising nutrient source for lipid production.…”

Section: Lipid Productionsupporting

confidence: 89%

Microalgae Cultivation Using Municipal Wastewater and Anaerobic Membrane Effluent: Lipid Production and Nutrient Removal

Tang

Chen

et al. 2023

Water

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Microalgae cultivation using wastewater is a combined process for pollutant removal and lipid production that has been widely studied in recent years. In this study, the effects of anaerobic membrane effluent (AME) and municipal wastewater (MW) ratios on microalgae growth and pollutant removal processes were investigated, and the lipid production properties were also explored. Results show that microalgae can grow in all AME/WW ratios, and a 40% AME content is the optimal condition for microalgal biomass accumulation (52.9 mg/L·d) and lipid production (0.378 g/L). Higher AME addition would inhibit microalgae growth. In addition, high ammonia (approximately 97%) and phosphate (around 90%) removal efficiencies can be achieved in all AME/WW ratio conditions, while the total nitrogen removal efficiencies decreased with the addition of AME. Total nitrogen and phosphate are the limiting factors in treating water to meet the requirements of the integrated wastewater discharge standard. This study provided a new method for anaerobic digestion and municipal wastewater treatment and also realized green energy production based on the sustainable development principles.

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Section: Lipid Productionsupporting

confidence: 89%

Microalgae Cultivation Using Municipal Wastewater and Anaerobic Membrane Effluent: Lipid Production and Nutrient Removal

Tang

Chen

et al. 2023

Water

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“…Uggetti et al used a 1:20 dilution of digested manure prior to microalgae growth [32]. In the case of cow manure digestate, a 1:50 dilution was applied in order to reduce inhibition [33]. This experiment showed an improvement in the growth of microalgae when using pretreatment with ozonation for the decolorization of 1.3 L of digestate diluted at 1:10.…”

Section: Microalgae Growth Monitoring Testsmentioning

confidence: 99%

Ozonation as Pretreatment of Digested Swine Manure Prior to Microalgae Culture

Palomar,

Álvaro,

Hermosilla

et al. 2024

Water

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Anaerobic digestion of animal manure generates biogas and removes biodegradable organic matter, while most of the nitrogen and phosphorous remains at very high levels after the process. A subsequent microalgae culture in the digestate provides nutrient uptake at very low operational and installation costs. However, the dark color of manure digestate prevents light penetration, reducing the rates of algae growth. Ozonation was researched as a strategy for color removal followed by microalgae culture. Although similar biomass production was achieved in treated and untreated digestates (1.09 vs. 0.99 g L−1), the positive effect of ozonation was evidenced by the significantly higher rates of photosynthetically produced oxygen: 0.804 and 0.18 mg O2 mg−1 TSS min−1, respectively, in ozonated and untreated digestates, revealing a four times higher rate of algae activity. However, this considerable higher activity was not correlated with better performance in nutrient removal since the microalgae treatment was assayed at a considerably reduced scale with a high ratio of illumination per volume. An operational costs analysis revealed that ozonation could be competitive against other strategies of color reduction such as dilution or coagulation/flocculation processes.

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