Year-long performance assessment of an on-site pilot scale (100 L) photobioreactor on nutrient recovery and pathogen removal from urban wastewater using native microalgal consortium

Dalvi, Vivek; Chawla, Pushap; Pant, Kamal K.

doi:10.1016/j.algal.2021.102228

Cited by 25 publications

(4 citation statements)

References 45 publications

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“…Cost is the main constraint limiting large-scale production of renewable fuels from microalgae [ 10 ], but another important limitation is nutrients [ 11 , 12 ]. Not only is it costly to provide chemical nutrients to support microalgal growth, but the availability of phosphorus in particular could well become a limiting factor in the foreseeable future [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Shining a Light on Wastewater Treatment with Microalgae

Kilbane

2022

Arab J Sci Eng

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Microalgae can produce biofuels, nutriceuticals, pigments and many other products, but commercialization has been limited by the cost of growing, harvesting and processing algal biomass. Nutrients, chiefly nitrogen and phosphorus, are a key cost for growing microalgae, but these nutrients are present in abundance in municipal wastewater where they pose environmental problems if not removed. This is not a traditional review article; rather, it is a fact-based set of suggestions that will have to be investigated by scientists and engineers. It is suggested that if microalgae were grown as biofilms rather than as planktonic cells, and if internal illumination rather than external illumination were employed, then the use of microalgae may provide useful improvements to the wastewater treatment process. The use of microalgae to remove nutrients from wastewater has been demonstrated, but has not yet been widely implemented due to cost, and because microalgae derived from wastewater treatment has not yet been demonstrated as a commercial source for value-added products. Future facilities are likely to be called Municipal Resource Recovery Facilities as wastewater will increasingly be viewed as a resource for water, biofuels, fertilizer, monitoring public health and value-added products. Advances in photonics will accelerate this transition.

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Section: Introductionmentioning

confidence: 99%

Shining a Light on Wastewater Treatment with Microalgae

Kilbane

2022

Arab J Sci Eng

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“…Several studies have demarcated the potential of suitable algal strains to acclimatize and grow well in different kinds of wastewater in batches and pilot-scale studies. [23,71,72]. Apart from remediation of the contaminants, the algal biomass also sequesters the atmospheric CO 2 and can help secure carbon credits for industries [73].…”

Section: Phycoremediation As a New Age Eco-friendly Technology For Ap...mentioning

confidence: 99%

Phycoremediation of Synthetic Dyes Laden Textile Wastewater and Recovery of Bio-Based Pigments from Residual Biomass: An Approach towards Sustainable Wastewater Management

et al. 2023

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The textile industry is a growing sector worldwide and has immense opportunity in terms of providing employment and boosting a nation’s economy. However, there exist severe environmental risks associated with textile effluents that impact the surrounding ecosystem. This review offers an approach for sustainable water management using phycoremediation to treat dye-laden wastewater and recover bio-based pigments from the residual biomass. Microalgae such as Chlorella, Scenedesmus, Phormidium, and macroalgae like Sargassum, Enteromorpha, and Codium has been extensively used in several phycoremediation-based studies, and their residual biomass could be a potent source for extraction of bio-based pigments. This review also recommends studies involving the algal-bacterial consortia approach for treating dye-laden wastewater as an alternative to conventional, biobased methods. The outcome of this study will provide policymakers and researchers with new insight to manage water and wastewater resources sustainably. Furthermore, this review also enhances our understanding of nature-based decontamination approaches for treating dye-laden wastewater through algal-based technologies.

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“…In a paradigm change, wastewater is being perceived as a resource with the focus shifting from treatment towards recovery of resources (e.g., water, energy, nutrients) (Coats and Wilson, 2017). Wastewater flowing in urban drains is often characterized by low organic load (in terms of chemical oxygen demand, COD) (Dalvi et al, 2021;Piaggio et al, 2022). Considering the low energy consumption in anaerobic treatment and the advantage of retaining the slow-growing anaerobic microorganisms in the reactor, anaerobic membrane bioreactors (AnM-BRs) have been tested for treating as-is and diluted municipal wastewater (Baek et al, 2010;Ji et al, 2020;Lin et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Performance of Anaerobic Membrane Bioreactor (AnMBR) with Sugarcane Bagasse Ash-based Ceramic Membrane treating Simulated Low-strength Municipal Wastewater: Effect of Operation Conditions

Dhiman¹,

Balakrishnan

Naddeo

et al. 2023

Water Air Soil Pollut

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This study assesses the performance of waste sugarcane bagasse ash (SBA)-based ceramic membrane in anaerobic membrane bioreactor (AnMBR) treating low-strength wastewater. The AnMBR was operated in sequential batch reactor (SBR) mode at hydraulic retention time (HRT) of 24 h, 18 h, and 10 h to understand the effect on organics removal and membrane performance. Feast-famine conditions were also examined to evaluate system performance under variable influent loadings. An average removal of >90% chemical oxygen demand (COD) was obtained at each HRT and starvation periods up to 96 days did not significantly affect removal efficiency. However, feast-famine conditions affected extracellular polymeric substances (EPS) production and consequently the membrane fouling. EPS production was high (135 mg/g MLVSS) when the system was restarted at 18 h HRT after shutdown (96 days) with corresponding high transmembrane pressure (TMP) build-up; however, the EPS content stabilized at ~60-80 mg/g MLVSS after a week of operation. Similar phenomenon of high EPS and high TMP was experienced after other shutdowns (94 and 48 days) as well. Permeate flux was 8.8±0.3, 11.2±0.1 and 18.4±3.4 L/m 2 h at 24 h, 18 h and 10 h HRT, respectively. Filtration-relaxation (4 min -1 min) and backflush (up to 4 times operating flux) helped control fouling rate. Surface deposits (that significantly attributed to fouling) could be effectively removed by physical cleaning, resulting in nearly complete flux recovery. Overall, SBR-AnMBR system equipped with waste-based ceramic membrane appears promising for treatment of low-strength wastewater with disruptions in feeding.

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Year-long performance assessment of an on-site pilot scale (100 L) photobioreactor on nutrient recovery and pathogen removal from urban wastewater using native microalgal consortium

Cited by 25 publications

References 45 publications

Shining a Light on Wastewater Treatment with Microalgae

Shining a Light on Wastewater Treatment with Microalgae

Phycoremediation of Synthetic Dyes Laden Textile Wastewater and Recovery of Bio-Based Pigments from Residual Biomass: An Approach towards Sustainable Wastewater Management

Performance of Anaerobic Membrane Bioreactor (AnMBR) with Sugarcane Bagasse Ash-based Ceramic Membrane treating Simulated Low-strength Municipal Wastewater: Effect of Operation Conditions

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