Growth of Chlorella pyrenoidosa on different septic tank effluents from rural areas for lipids production and pollutants removal

Tan, Xuanping; Wang, Lu; Wan, Xi-Ping; Zhou, Xiao-Ni; Yang, Libin; Zhang, Wenwen; Zhao, Xiaohui

doi:10.1016/j.biortech.2021.125502

Cited by 17 publications

(7 citation statements)

References 46 publications

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“…In the present study, acetate was indirectly added to the SW by mixing with the FW that contained large amounts of acetate and which may improve the lipid accumulation of microalgae. However, some microalgal species can accumulate more lipid in photoautotrophic than in mixotrophic cultivation [27]. Thus, lipid accumulation behavior in the different trophic modes may be strain dependent.…”

Section: Discussionmentioning

confidence: 99%

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Simultaneous Treatment of Swine and Furfural Wastewater Integrated with Lipid Production of Chlorella pyrenoidosa

Huang

Zhang

Zhang³

et al. 2022

Applied Sciences

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Adding organic compounds to wastewater can improve the carbon/nitrogen ratio and benefit microalgae growth. We studied microalgal growth, nutrient removal and lipid accumulation of Chlorella pyrenoidosa cultured in a mixture of swine wastewater (SW) and furfural wastewater (FW). The mix ratio of SW:DFW (diluted furfural wastewater) had a significant effect on microalgae growth. As the mix ratio of SW:DFW decreased from 1:0.5 to 1:19, the maximum microalgal biomass increased, while the specific growth rate initially increased and then decreased. The efficiency of nutrient removal also depended on the mix ratio of wastewater. The highest chemical oxygen demand (COD) removal efficiency (57.30%) occurred at the mix ratio of SW:DFW = 1:3. The highest removal efficiencies of total phosphorous (TP) reached 61.93% when the mix ratio of SW:DFW was 1:9. Wastewater at the mix ratio of SW:DFW = 1:19 had a maximum lipid productivity of 49.48 mg L−1 d−1, which was 4.9 times higher than that at a mix ratio of SW:DFW = 1:0.5. These results showed that C. pyrenoidosa can be used to remove nutrients from mixed wastewater sources and simultaneously produce algal lipids.

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Section: Discussionmentioning

confidence: 99%

“…C. pyrenoidosa is often used for wastewater treatment, such as swine wastewater, municipal and industrial wastewater [24][25][26]. Moreover, several studies demonstrated that C. pyrenoidosa has a strong capability to remove the COD, TN, NH 3 -N and TP from wastewater, and simultaneously accumulate a large amount of lipid [27,28].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Treatment of Swine and Furfural Wastewater Integrated with Lipid Production of Chlorella pyrenoidosa

Huang

Zhang

Zhang³

et al. 2022

Applied Sciences

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“…These pretreatments can remove suspended solids, debris and colloidal particles, which can limit light penetration and microbial contamination from wastewater. According to [33], all of their wastewater samples included significant levels of suspended particles, which might limit photosynthetic performance. As a result, they centrifuged them for 15 min at 5000 rpm before filtering the liquids through 0.45 µm polyester filters.…”

Section: Pretreatmentmentioning

confidence: 99%

“…As a result, they centrifuged them for 15 min at 5000 rpm before filtering the liquids through 0.45 µm polyester filters. They further sterilized the filtrated samples in an autoclave for 20 min at 121 • C to guarantee that they were axenic [33]. Other authors have filtered and sterilized the wastewater by autoclaving at 15 psi for 30 min to remove particles and microorganisms such as bacteria, fungi and microalgae [34].…”

Section: Pretreatmentmentioning

confidence: 99%

Recent Trends on Domestic, Agricultural and Industrial Wastewaters Treatment Using Microalgae Biorefinery System

Bakraoui

Slaoui²,

Mabrouki

et al. 2022

Applied Sciences

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In addition to producing bioenergy and molecules with high added value, microalgae have been recognized as an efficient microorganism for wastewater treatment. However, a major obstacle preventing its widespread use is the high energy cost of pretreatment, cultivation and downstream processes. Different types of wastewaters have been tested as culture mediums for microalgal biorefinery system. This review gives a summary of the most used microalgae strains for wastewater treatment, as well as information on the physical and chemical characteristics of domestic, agricultural, and industrial wastewaters. It also discusses wastewater pretreatment techniques, nutrient uptake and removal, biomass production and biomolecules productivities. There is also discussion on how microalgae remove contaminants from wastewater. Additionally, the problems and restrictions of microalgae-based wastewater treatment are explored, and recommendations are made for additional study and advancement. This literature review demonstrates that microalgae monoculture systems have proven to be beneficial as an innovative wastewater treatment technology, due to its high efficiencies in pollutant removals and biomolecule production; however, the upstream and downstream treatment pose a limit to industrialize the process. Until now, there has been no conventional design of the wastewater treatment process using microalgae in the biorefinery system, which constitutes a huge gap to assess a real life cycle assessment (LCA) and techno economic analysis (TEA).

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“…It removes a portion of settleable solids by retention and organic matter by partial anaerobic digestion from the waste water (1). The effluents from septic tank still contain abundant ammonium and phosphate and might be favourable to microalgae cultivation compared to using raw wastewater (2). High rate algal ponds (HRAPs) are shallow, mixed systems consisting of a series of interconnecting baffled channels.…”

Section: Introductionmentioning

confidence: 99%

Cultivo de tilapia con efluente de tanque séptico-laguna de alta tasa: pulimento para tratamiento de aguas residuales domésticas y recuperación de recursos

Sánchez-Ortiz,

Bastos,

Lanna

et al. 2024

inycomp

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En un experimento a escala piloto desarrollado en Brasil, se cultivaron juveniles de tilapia genéticamente mejorada en efluente de tanque séptico seguido de laguna de alta tasa (LAT). Durante las 22 semanas de la investigación se evaluó la combinación de tres tasas de aplicación superficial de nitrógeno amoniacal total (NAT) (0,6; 1,2 y 2,4 kg NAT.ha-1.d-1) y tres densidades de cultivo (3; 6 y 12 peces.m-2). Los tanques de cultivo funcionaron como unidades de pulimento para tratamiento de las aguas residuales, adicionando (con los mejores resultados, alcanzados con la menor densidad de cultivo y 1,2 kg NAT.ha-1.d-1) las siguientes eficiencias de remoción adicionales a las obtenidas mediante el uso de la LAT: 78,3% para nitrógeno total Kjeldahl; 89,1% para nitrógeno amoniacal; 63,9% para fósforo total; 57,2% para demanda química de oxígeno; 2,36 unidades logarítmicas para E. coli. La productividad de los peces se estimó del orden de 2,67 ton.ha-1 para cultivo durante seis meses por año para climas templados, utilizando la población de plancton natural del agua residual doméstica tratada como la única fuente de alimento.

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Growth of Chlorella pyrenoidosa on different septic tank effluents from rural areas for lipids production and pollutants removal

Cited by 17 publications

References 46 publications

Simultaneous Treatment of Swine and Furfural Wastewater Integrated with Lipid Production of Chlorella pyrenoidosa

Simultaneous Treatment of Swine and Furfural Wastewater Integrated with Lipid Production of Chlorella pyrenoidosa

Recent Trends on Domestic, Agricultural and Industrial Wastewaters Treatment Using Microalgae Biorefinery System

Cultivo de tilapia con efluente de tanque séptico-laguna de alta tasa: pulimento para tratamiento de aguas residuales domésticas y recuperación de recursos

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