A review of microalgae-based biorefineries approach for produced water treatment: Barriers, pretreatments, supplementation, and perspectives

Pessôa, Luiggi Cavalcanti; Cruz, Eric C.; Deamici, Kricelle Mosquera; Bomfim, Bianca; Santana, N.; Vieira, Suellen Rocha; Silva, Jânia; Pontes, Luiz Antônio Magalhães; Oliveira, Carolina Cunha de; Druzian, Janice Izabel; Assis, Denílson de Jesus

doi:10.1016/j.jece.2022.108096

Cited by 11 publications

(5 citation statements)

References 75 publications

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“…During the adaptation period, microalgae growth can be inhibited, and cell numbers may be reduced due to toxicity. This toxicity results in the degradation of intracellular compounds, such as photosynthetic pigments, leading to a reduction in cell size (Cavalcanti Pessôa et al 2022 ).…”

Section: Resultsmentioning

confidence: 99%

Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor

Khairuddin,

Khan,

Sankaran

et al. 2024

Bioresour. Bioprocess.

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Produced water (PW) from oil and gas exploration adversely affects aquatic life and living organisms, necessitating treatment before discharge to meet effluent permissible limits. This study first used activated sludge to pretreat PW in a sequential batch reactor (SBR). The pretreated PW then entered a 13 L photobioreactor (PBR) containing Scenedesmus obliquus microalgae culture. Initially, 10% of the PW mixed with 90% microalgae culture in the PBR. After the exponential growth of the microalgae, an additional 25% of PW was added to the PBR without extra nutrients. This study reported the growth performance of microalgae in the PBR as well as the reduction in effluent’s total organic carbon (TOC), total dissolved solids (TDS), electrical conductivity (EC), and heavy metals content. The results demonstrated removal efficiencies of 64% for TOC, 49.8% for TDS, and 49.1% for EC. The results also showed reductions in barium, iron, and manganese in the effluent by 95, 76, and 52%, respectively.

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Section: Resultsmentioning

confidence: 99%

Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor

Khairuddin,

Khan,

Sankaran

et al. 2024

Bioresour. Bioprocess.

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“…Microalgae grown in effluent water can produce more primary and secondary metabolites such as protein, fat, carbohydrates, pigment, and antioxidants. They could be exploited to produce high‐value‐added products like nutraceuticals, biopolymers, biofuel, fertilisers, enzymes, animal feed, health supplements etc (Cavalcanti Pessôa et al, 2022). Microalgae is known to contain approximately 80% neutral lipids, the majority of which are triglycerides.…”

Section: Industrial Perspectives Of Circular Economy Using Microalgaementioning

confidence: 99%

“…As a result, wastewater is becoming increasingly popular as a resource due to its cost‐effectiveness. However, most carbon capture projects using microalgae are still in the laboratory stage and require further development to reach a large scale (Cavalcanti Pessôa et al, 2022). The scope for using microalgae to mitigate carbon footprint is extensively wide.…”

Section: Co2 Fixing Efficiency Of Microalgae Grown On Wastewatermentioning

confidence: 99%

Current and future perspectives of a microalgae based circular bioeconomy to manage industrial wastewater– A Systematic Review

Raghuraman Rengarajan,

Detchanamurthy,

Panneerselvan

et al. 2024

Physiologia Plantarum

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Post technological advancements and industrialisation, the recovery of resources by treating wastewater is gaining momentum. As the global population continues to grow, the need for water is becoming increasingly urgent. Therefore, the re‐utilisation of water is becoming an increasingly important factor in the preservation of life on this planet. Wastewater is classified according to its source of origin. When left untreated, the effluent causes several environmental hazards and poses health issues as they have higher concentrations of nutrients and toxic heavy metals. Currently, several conventional methods exist to treat and handle wastewater, but they generate secondary waste post‐treatment and are not sustainable. Microalgae‐based treatment of wastewater is highly sustainable, cost‐efficient and aligns with the concept of circular bioeconomy. The biological treatment of effluents using microalgae has several advantages. Approximately 1.83 kg of CO2 is sequestered per kg of the dry biomass during microalgae cultivation. Among all the sustainable alternatives, microalgae offer better biomass productivity by utilising a higher concentration of nutrients in wastewater. The wastewater‐grown microalgae have higher efficiency in producing commercially important secondary metabolites. This systematic review highlights the competence of microalgae in different wastewater sources and their industrial perspectives. This also gives an overview of the biproducts produced from microalgae‐based wastewater treatment.

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“…During the adaptation period, microalgae growth is inhibited and cell numbers are reduced due to the toxicity caused by PW that results in the degradation of intracellular compounds such as photosynthetic pigments leading to a reduction in cell size [34]. However, the duration of the adaptation period depends on the type of microalgae strain.…”

Section: The Growth Of Microalgae In the Pwmentioning

confidence: 99%

Produced Water Treatment by Semi-Continuous Sequential Bioreactor and Microalgae Photobioreactor

Khairuddin

2023

Preprint

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Produced water (PW) from oil and gas exploration has adverse effects on aquatic life and living organisms that need to be treated before discharge. However, proper treatment is essential to meet the permissible limits. In the study, the PW was first pre-treated with activated sludge. The pre-treated PW was then utilized as a feed for the Scenedesmus obliquus microalgae in a 13 L photobioreactor. Initially, 10% of the PW was introduced in 90% microalgae culture, and after exponential growth, an additional 25% of PW was added without any additional nutrients. This study has demonstrated the impact of semi-continuous treatment on the growth of microalgae as well as the removal of pollutants including total organic carbon (TOC) and heavy metals. Moreover, salinity, electrical conductivity (EC), pH, and total dissolved solids (TDS) of the PW-microalgae culture were assessed. The removal efficiency for TOC, TDS and EC was 64, 49.8, and 49.1% respectively. Furthermore, S. obliquus has effectively removed barium, iron, and manganese heavy metals 95, 76, and 52% respectively. S. obliquus has been found to be able to grow in a mixotrophic environment as it has reduced TOC in the PW.

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A review of microalgae-based biorefineries approach for produced water treatment: Barriers, pretreatments, supplementation, and perspectives

Cited by 11 publications

References 75 publications

Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor

Produced water treatment by semi-continuous sequential bioreactor and microalgae photobioreactor

Current and future perspectives of a microalgae based circular bioeconomy to manage industrial wastewater– A Systematic Review

Produced Water Treatment by Semi-Continuous Sequential Bioreactor and Microalgae Photobioreactor

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