Enhanced nutrient removal and bioenergy production in microalgal photobioreactor following anaerobic membrane bioreactor for decarbonized wastewater treatment

Ding, Meiyue; Wang, Chuansheng; Bae, Sung Woo; Ng, How Yong

doi:10.1016/j.biortech.2022.128120

Cited by 17 publications

(5 citation statements)

References 37 publications

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“…NH 4 concentration in the permeate was measured between 40.8 and 69.6 mg/L while PO 4 was around 5-7.9 mg/L. Although it was not a concern in the study, high nutrient content accompanied by low organic matter and total suspended solids (TSS) in the effluent would enable the application of resource recovery options such as microalgae cultivation in the permeate (Ding et al 2022). In addition, co-digestion increased methane production by up to 190% compared to the mono-digestion of MWW.…”

Section: Historical Developmentmentioning

confidence: 89%

Enhanced energy recovery in municipal wastewater treatment plants through co-digestion by anaerobic membrane bioreactors: current status and future perspectives

Cengiz,

Guven,

Ozgun

et al. 2024

Rev Environ Sci Biotechnol

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Today, the transition to renewable energy from conventional energy practices is more important than ever to establish energy security and mitigate climate change. The wastewater treatment plants (WWTP) consume a remarkable amount of energy and cause significant greenhouse gas emissions. The energy balance of WWTP can be improved by implementing energy-efficient applications such as anaerobic digestion. However, most of the existing WWTPs utilize only sewage sludge in conventional anaerobic digesters (CAD) which results in low biogas generation. Generally, co-digestion is indicated as an effective solution for the low biogas generation faced in mono-digestion. Moreover, recently, anaerobic membrane bioreactors (AnMBR) have been promoted as a prominent alternative to CADs. This paper overviews the current situation of co-digestion applications by AnMBRs for municipal WWTPs. Furthermore, the environmental and economic aspects of these applications were reviewed. Lastly, challenges and future perspectives related to the co-digestion applications by AnMBR were thoroughly discussed. Graphical Abstract

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Section: Historical Developmentmentioning

confidence: 89%

Enhanced energy recovery in municipal wastewater treatment plants through co-digestion by anaerobic membrane bioreactors: current status and future perspectives

Cengiz,

Guven,

Ozgun

et al. 2024

Rev Environ Sci Biotechnol

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“…The resulting biomass can be valorized for various applications, from biofuels to high-value compounds, potentially offsetting treatment costs and generating revenue. [35,36] However, integrating microalgae into wastewater treatment is not without challenges. Upfront investments are needed for setting up cultivation systems.…”

Section: Municipal Wastewater Treatment Plantsmentioning

confidence: 99%

Current Insights into Growing Microalgae for Municipal Wastewater Treatment and Biomass Generation

Dammak,

Fersi,

Hachicha

et al. 2023

Resources

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Municipal wastewater (MWW) provides a promising platform for microalgae cultivation due to its rich content of essential nutrients. Recent research has showcased the multifaceted benefits of microalgae-based wastewater treatment, from the potent depollution capabilities of these organisms to their biomass potential for ecofriendly applications. A significant advantage lies in the ability of these systems to promote environmental sustainability without producing secondary pollutants, aligning with the circular economy model. This approach encompasses various stages, from cultivating microalgae to biomass separation and subsequent valorization. However, challenges arise when scaling these systems to industrial levels. A predominant barrier is the difficulty in maintaining consistent control over all the factors influencing wastewater phytoremediation. This can compromise both biomass survival and the efficiency of pollution removal and valorization. Notably, using native microalgal consortiums from the effluent appears to be a promising strategy. These autochthonous communities often demonstrate superior adaptability and treatment capacity, emphasizing the importance of further exploring their potential to provide effective and economically viable solutions for wastewater treatment.

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“…The net energy demand per tonne of produced microalgae biomass, represented by E (kWh•tVSS -1 ), was determined using (15), requiring to estimate the total thermal energy demand, denoted as Q demand (kWh•tVSS -1 ), by means of ( 16); the balance of the total electrical energy demand, W demand (kWh•tVSS -1 ), defined in (17); and the biomethane production, Q BM (kWh•tVSS -1 ), in Scenarios 2 and 3, calculated using (18). Note that positive values denote net energy consumption, while negative values signify net energy recovery.…”

Section: Energy and Ghg Emissions Estimationmentioning

confidence: 99%

“…Reducing surface area requirements entails minimizing the long hydraulic retention times (HRTs) typically needed for water treatment, i.e., 3-10 days [14][15][16]. One potential solution involves separating microalgae biomass from the treated water, allowing higher wastewater flow into the system to enhance nutrient loads, as they can be limiting in sewage treatment [17,18]. This separation enables decoupling HRT and SRT, which grants microalgae extended growth time within the microalgal photobioreactor (PBR).…”

Section: Introductionmentioning

confidence: 99%

Towards Optimisation of Microalgae Cultivation through Monitoring and Control in Membrane Photobioreactor Systems

Mora-Sánchez,

Ribes,

González-Camejo

et al. 2023

Water

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This research lays a foundation for optimised membrane photobioreactor performance and introduces novel control parameters crucial for advancing microalgae cultivation techniques and promoting environmental sustainability. Particularly, this study presents an innovative solids retention time (SRT) controller designed for a pilot-scale membrane photobioreactor. Employing a fuzzy-logic knowledge-based approach, this controller uses the first derivative of pH data dynamics (pH′) as an input variable, directly correlated with nitrogen recovery rate and biomass productivity when normalised by average light irradiance (I2). Through a feedback mechanism, it regulates daily SRT variations, ensuring stable reactor operation, optimal volatile suspended solids concentration, efficient nitrogen removal, and enhanced biomass productivity. Normalised nitrogen recovery rate, considering solar light irradiance and volatile suspended solids concentration, increased by 51% compared to previous studies employing fixed SRT and hydraulic retention time (HRT). Combining this SRT controller with a previously studied HRT controller could potentially amplify biomass productivity efficiency. In addition, controlling or not controlling the HRT and SRT are assessed in terms of filtration performance and GHG emissions. Finally, a new dissolved-oxygen-based parameter shows promise for continuous microalgae culture control.

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Enhanced nutrient removal and bioenergy production in microalgal photobioreactor following anaerobic membrane bioreactor for decarbonized wastewater treatment

Cited by 17 publications

References 37 publications

Enhanced energy recovery in municipal wastewater treatment plants through co-digestion by anaerobic membrane bioreactors: current status and future perspectives

Enhanced energy recovery in municipal wastewater treatment plants through co-digestion by anaerobic membrane bioreactors: current status and future perspectives

Current Insights into Growing Microalgae for Municipal Wastewater Treatment and Biomass Generation

Towards Optimisation of Microalgae Cultivation through Monitoring and Control in Membrane Photobioreactor Systems

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