Anaerobic digestion of microalgal biomass with ultrasonic disintegration

Park, Ki Young; Kweon, Ji Hyang; Chantrasakdakul, Phrompol; Lee, Kwanyong; Young, Ho

doi:10.1016/j.ibiod.2013.03.035

Cited by 79 publications

(31 citation statements)

References 24 publications

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“…Ultrasonic pretreatment generates bubble cavitation that causes intense heating and formation of free radicals [27], facilitating the disruption of algal cells and the solubilization of organic polymers [28]. Recent studies have also reported that increasing sonication intensity led to enhanced solubilization of OM in algal biomass [28][29][30]. The OM solubilization attained by the most aggressive sonication treatment (40.9%) was high compared to the results in several literature studies.…”

Section: Effect Of Sonication On Cod Solubilizationmentioning

confidence: 98%

Pretreatments to enhance the anaerobic biodegradability of Chlorella protothecoides algal biomass

Ayala-Parra

Liu

Sierra-Álvarez

et al. 2017

Env Prog and Sustain Energy

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Anaerobic digestion (AD) is a promising approach for the recovery of energy and nutrients from microalgae biomass, but the process is limited by the resistance of the thick algal cell wall to biodegradation. This study investigated the effect of sonication, thermal, and alkaline pretreatments to improve methane (CH4) production and nitrogen release during AD of Chlorella protothecoides algal biomass. C. protothecoides is a promising feedstock for biofuel production because it can accumulate high lipid levels. Sonication experiments at 20 kHz indicated that increasing power level enhanced organic matter solubilization, CH4 production, and nitrogen released during AD of the pretreated biomass. Sonication under optimized conditions provided a marked increase in the CH4 yield compared with the untreated algae following AD for 41 days (327 and 146 mLSTP CH4 per gram volatile solids, respectively). Sonication also led to 4.1‐fold increase in ammonia N release. In contrast, thermal and alkaline pretreatment showed limited potential to improve CH4 production and N release. The results indicated that AD of sonicated C. protothecoides biomass is a promising approach to generate CH4 gas, a valuable fuel material, and release nutrients that can be recycled to meet the high fertilizer demand of algal cultivation systems. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 418–424, 2018

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Section: Effect Of Sonication On Cod Solubilizationmentioning

confidence: 98%

Pretreatments to enhance the anaerobic biodegradability of Chlorella protothecoides algal biomass

Ayala-Parra

Liu

Sierra-Álvarez

et al. 2017

Env Prog and Sustain Energy

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“…Figure 7.6 shows the significant disruption of H. reticulatum cells after the application of US. The use of US has also proven to be effective in improving the disintegration and anaerobic biodegradability of waste microalgal biomass, Chlorella vulgaris [66]. Park et al [66] demonstrated that ultrasonic pretreatment using power densities in the range of 5-200 J/mL −1 significantly improved the solubility of substrate and higher soluble COD was attained at higher applied energy.…”

Section: Ultrasonic Pretreatment and Conversion Of Algal Biomassmentioning

confidence: 99%

“…The use of US has also proven to be effective in improving the disintegration and anaerobic biodegradability of waste microalgal biomass, Chlorella vulgaris [66]. Park et al [66] demonstrated that ultrasonic pretreatment using power densities in the range of 5-200 J/mL −1 significantly improved the solubility of substrate and higher soluble COD was attained at higher applied energy. Compared to the untreated sample, the specific methane production increased by 90 % in the US-treated sample at an energy dose of 200 J/mL −1 .…”

Section: Ultrasonic Pretreatment and Conversion Of Algal Biomassmentioning

confidence: 99%

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Ultrasound as a Green Processing Technology for Pretreatment and Conversion of Biomass into Biofuels

Tang

Sivakumar

2014

Production of Biofuels and Chemicals With Ultrasound

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In the past decades, a great deal of attention has been focused on mechanical, thermal or chemical pretreatments of lignocellulosic and algal biomass for the production of biofuel. This chapter is focused on the potential of ultrasound (US) technology in pretreating the biomass to enhance the conversion of cellulose to fermentable sugars and also the disintegration and component extraction of microalgae for the generation of bioethanol or biogas. In addition, US can supplement existing biomass pretreatment methods to greatly enhance their performance and their efficacy. Low frequency ultrasound (LFU, 20-100 kHz) is commonly used in biomass processing, particularly in processes that require intense physical effects such as cell disruption and polymer degradation. High frequency ultrasound (HFU, 400 kHz-2 MHz) recently attracted considerable interest as potential alternative technique for pretreating both the lignocellulosic and algal biomass for sustainable biofuel production. HFU is gaining increasing importance because of its environmentally sound and energy-saving production method since it demands lower energy input for the conversion of biomass. It not only saves time and energy but also lowers the chemical/enzyme dosage and hence novel and considered to be a new sustainable and environmentally-friendly green technique. Although many studies have shown the promise of ultrasound in the cell breakdown for enhanced enzymatic hydrolysis, there is limited information in the application of HFU on biomass pretreatment processes. This chapter provides an overview on the fundamentals of US, the critical parameters that control the conversion of biomass, challenges involved with the application of US in the biomass conversion and its future perspectives.

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“…However, biofuel production from microalgae feedstock has several problems to be resolved before it can become an economical and environmental ways of alternative energy (Ward et al, 2014). The problems face high energy required for conversion process and the process of disposing the residual biomass is difficult even after beneficial lipid extraction since the defatted biomass still contains higher levels of organic matter, such as carbohydrate and protein (Park et al, 2013). Anaerobic digestion can be a solution to these problems because this technical process can mineralize algal biomass (Sialve et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrothermal Pretreatment for Enhanced Biogas Production Using Micro-algal Biomass

Lee

Kim

Park

et al. 2016

IJBSBT

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Anaerobic digestion of microalgal biomass with ultrasonic disintegration

Cited by 79 publications

References 24 publications

Pretreatments to enhance the anaerobic biodegradability of Chlorella protothecoides algal biomass

Pretreatments to enhance the anaerobic biodegradability of Chlorella protothecoides algal biomass

Ultrasound as a Green Processing Technology for Pretreatment and Conversion of Biomass into Biofuels

Effect of Hydrothermal Pretreatment for Enhanced Biogas Production Using Micro-algal Biomass

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