Development and performance evaluation of an algal biofilm reactor for treatment of multiple wastewaters and characterization of biomass for diverse applications

Choudhary, Poonam; Prajapati, Sanjeev Kumar; Kumar, Pushpendar; Malik, Anushree

doi:10.1016/j.biortech.2016.10.078

Cited by 114 publications

(31 citation statements)

References 32 publications

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“…For example, the time, energy, and financial costs associated with biomass harvesting and dewatering are lessened significantly [ 14 ]. Immobilization of the cells in biofilm growth systems creates the potential for more efficient use of light through the positioning of concentrated biomass for optimum light harvesting [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel System for Real-Time, In Situ Monitoring of CO2 Sequestration in Photoautotrophic Biofilms

et al. 2020

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Climate change brought about by anthropogenic CO2 emissions has created a critical need for effective CO2 management solutions. Microalgae are well suited to contribute to efforts aimed at addressing this challenge, given their ability to rapidly sequester CO2 coupled with the commercial value of their biomass. Recently, microalgal biofilms have garnered significant attention over the more conventional suspended algal growth systems, since they allow for easier and cheaper biomass harvesting, among other key benefits. However, the path to cost-effectiveness and scaling up is hindered by a need for new tools and methodologies which can help evaluate, and in turn optimize, algal biofilm growth. Presented here is a novel system which facilitates the real-time in situ monitoring of algal biofilm CO2 sequestration. Utilizing a CO2-permeable membrane and a tube-within-a-tube design, the CO2 sequestration monitoring system (CSMS) was able to reliably detect slight changes in algal biofilm CO2 uptake brought about by light–dark cycling, light intensity shifts, and varying amounts of phototrophic biomass. This work presents an approach to advance our understanding of carbon flux in algal biofilms, and a base for potentially useful innovations to optimize, and eventually realize, algae biofilm-based CO2 sequestration.

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Section: Introductionmentioning

confidence: 99%

A Novel System for Real-Time, In Situ Monitoring of CO2 Sequestration in Photoautotrophic Biofilms

et al. 2020

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“…As mentioned earlier, microalgae can also be cultivated in wastewater, which leads to wastewater treatment by removing contaminants present in the wastewater. Choudhary et al [47] developed a modified algal biofilm reactor (ABR) for assessing the biomass productivity and treatment potential in different wastewaters. A nonwoven spun bond fabric was used as a suitable support for the growth of biofilm and the algae were grown in various mediums such as livestock wastewater, domestic grey water and anaerobically digested slurry.…”

Section: Major Products Obtained From Oleaginous Microalgaementioning

confidence: 99%

“…As a result, high lipid (38%) content was obtained in grey water biomass and high protein (44%) content was found in the other two mediums. The net energy ratio (NER) of the of the ABR system was found to be (>1), which suggests that it is potentially useful to treat and manage rural wastewaters while simultaneously producing biomethane, biofertilizers and livestock feed supplements [47].…”

Section: Major Products Obtained From Oleaginous Microalgaementioning

confidence: 99%

Cultivation of Oily Microalgae for the Production of Third-Generation Biofuels

et al. 2019

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Biofuel production by oleaginous microalgae is a promising alternative to the conventional fossil fuels. Many microalgae species have been investigated and deemed as potential renewable sources for the production of biofuel, biogas, food supplements and other products. Oleaginous microalgae, named for their ability to produce oil, are reported to store 30–70% of lipid content due to its metabolic properties under nutrient starvation conditions. This review presents the assortment of the research studies focused on biofuel production from oleaginous microalgae. The new methods and technologies developed for oleaginous microalgae cultivation to improve their biomass content and lipid accumulation capacity were reviewed. The production of renewable, carbon neutral, bio-based or microalgae-based transport fuels are necessary for environmental protection and economic sustainability. Microalgae are a significant source of renewable biodiesel because of their ability to produce oils in the presence of sunlight more efficiently than that of crop oils. This review will provide the background to understanding the bottlenecks and the need for improvement in the cultivation or harvesting process for oleaginous microalgae.

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“…In addition to TDS removal, the biomass produced from the algal reactors can be used for various applications such as fertilizer, bio‐based chemicals, and biofuel production. For example, algal biomass produced from open pond (Kumar, Prajapati, Malik, & Vijay, ) or biofilm reactor (Choudhary, Prajapati, Kumar, Malik, & Pant, ) has been used for energy recovery through anaerobic digestion.…”

Section: Introductionmentioning

confidence: 99%

Removal of total dissolved solids from wastewater using a revolving algal biofilm reactor

Peng

Kumar

Gross

et al. 2019

Water Environment Research

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Total dissolved solids (TDS) comprising inorganic salts and organic matters are pollutants of concern to aquatic systems and water for human use. This work aimed to investigate the use of revolving algal biofilm (RAB) reactors as a sustainable and environmental friendly method to remove TDS from industrial effluents and municipal wastewaters. The wastewaters contained chloride, sodium, potassium, calcium, magnesium, and sulfate as the major components. The RAB reactors fed with synthetic industrial effluent with high TDS level demonstrated the best algal growth, with the highest TDS removal efficiency (27%) and removal rate (2,783 mg/L-day and 19,530 mg/m 2 -day). A suspended algal culture system only removed 3% TDS from the same wastewater. The TDS removal by the RAB reactors was considered due to several mechanisms such as absorption by the algae cells, adsorption by extracellular polymeric substance of the biofilm, and/or precipitation. Collectively, this research shows that the RAB reactors can serve as an efficient system in wastewater remediation for TDS removal. © 2019 Water Environment Federation • Practitioner points• Total dissolved solids (TDS) in wastewater are pollutants of concern. • The RAB reactors can remove TDS from various types of wastewater. • The RAB reactors removed TDS by adsorbing ions elements such as Cl, Na, K, Ca, Mg, and S. • The algal biomass absorbs ions through extracellular polymeric substance.

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Development and performance evaluation of an algal biofilm reactor for treatment of multiple wastewaters and characterization of biomass for diverse applications

Cited by 114 publications

References 32 publications

A Novel System for Real-Time, In Situ Monitoring of CO2 Sequestration in Photoautotrophic Biofilms

A Novel System for Real-Time, In Situ Monitoring of CO2 Sequestration in Photoautotrophic Biofilms

Cultivation of Oily Microalgae for the Production of Third-Generation Biofuels

Removal of total dissolved solids from wastewater using a revolving algal biofilm reactor

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