Effect of low intensity sonic mediated fragmentation of anaerobic granules on biosurfactant secreting bacterial pretreatment: Energy and mass balance analysis

Kavitha, S.; Kannah, R. Yukesh; Gunasekaran, M.; Nguyen, Dinh Duc; Al-Muhtaseb, Ala’a H.; Park, Jeong Hoon; Banu, J. Rajesh

doi:10.1016/j.biortech.2019.01.118

Cited by 31 publications

(6 citation statements)

References 27 publications

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“…The final step of the pre-treatment process is drying of the substrates (hydrolysates). The substrate is then incorporated into the microbial growth media wherein the substrates are used by the microbes as the primary source of sugar for growth followed by the production of biosurfactant in the form of metabolites [ 105 – 107 ]. Depending on the substrate to be treated, the pre-treatment steps can be used individually or in the sequence outlined above.…”

Section: Pre-treatment Of Substrates For the Production Of Biosurfactantsmentioning

confidence: 99%

A critical review on various feedstocks as sustainable substrates for biosurfactants production: a way towards cleaner production

et al. 2021

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The quest for a chemical surfactant substitute has been fuelled by increased environmental awareness. The benefits that biosurfactants present like biodegradability, and biocompatibility over their chemical and synthetic counterparts has contributed immensely to their popularity and use in various industries such as petrochemicals, mining, metallurgy, agrochemicals, fertilizers, beverages, cosmetics, etc. With the growing demand for biosurfactants, researchers are looking for low-cost waste materials to use them as substrates, which will lower the manufacturing costs while providing waste management services as an add-on benefit. The use of low-cost substrates will significantly reduce the cost of producing biosurfactants. This paper discusses the use of various feedstocks in the production of biosurfactants, which not only reduces the cost of waste treatment but also provides an opportunity to profit from the sale of the biosurfactant. Furthermore, it includes state-of-the-art information about employing municipal solid waste as a sustainable feedstock for biosurfactant production, which has not been simultaneously covered in many published literatures on biosurfactant production from different feedstocks. It also addresses the myriad of other issues associated with the processing of biosurfactants, as well as the methods used to address these issues and perspectives, which will move society towards cleaner production.

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Section: Pre-treatment Of Substrates For the Production Of Biosurfactantsmentioning

confidence: 99%

A critical review on various feedstocks as sustainable substrates for biosurfactants production: a way towards cleaner production

et al. 2021

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“…In general, they found that the higher energy applied resulted in a higher COD solubilization. Some studies have shown positive effects of ultrasonication on the disintegration of anaerobic and aerobic granules [61,62]. Ultrasounds disintegrate both cellular and extracellular matter, therefore, the increase in the concentration of the soluble COD is achieved by solubilizing the solid matter, as well as the extracellular polymeric substances (EPS) dissolved in the aqueous phase [48].…”

Section: Effects Of Ultrasonic Pretreatment On Solubilization Of Orga...mentioning

confidence: 99%

The Influence of the Ultrasound Disintegration of Microalgal–Bacterial Granular Sludge on Anaerobic Digestion Efficiency

et al. 2023

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It has been proven that the biocenosis of microalgae and bacteria improves the chemical properties of biomass for its use in anaerobic digestion. However, this anaerobic digestion can be limited by the strong, compact, and complex structure of granulated biomass. Therefore, there is a need to search for an effective method for microalgal–bacterial granular sludge pretreatment, which has not been undertaken in previous scientific works. In this study, ultrasonic pretreatment was used to determine the effects of sonication on anaerobic digestion efficiency. Anaerobic digestion was performed in batch respirometric reactors. It was found that the ultrasonic pretreatment enhanced the biomass solubility; thus, the organic matter concentration increased more than six times compared to the variant without pretreatment. The study showed a positive effect of sonication on the kinetics of the anaerobic process and methane production. The highest methane yield was found in the variants in which the ultrasonication lasted from 150 s to 200 s, and this yield was from 534 ± 16 mL CH4/g VS to 561 ± 17 mL CH4/g VS. The data analysis confirmed strong correlations between the pretreatment time, the amount of biogas and methane production, and the gross energy gain. The highest net energy output and net energy gain were obtained for 150 s of sonication, and, respectively, were 4.21 ± 0.17 Wh/g VS and 1.19 ± 0.18 Wh/g VS.

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“…In fermentation techniques, the reaction ceases till the fermentation step of the acidogenic and acetogenic phase ad produces H 2 . The initial step of hydrolysis shows remarkable significance in eminent organic matter and thus turns out to be the rate circumscribing step in AD (Shanthi et al, 2018;Kavitha et al, 2019a;Kannah et al, 2019;Kannah et al, 2021). The utilization of raw material for AD or fermentation makes it difficult to handle due to its complexity and rate-limiting hydrolysis step.…”

Section: Frontiers In Energy Researchmentioning

confidence: 99%

“…Due to the complexity of the structure of waste biomass, the efficiency of energy production is reduced. During the anaerobic digestion and fermentation method, the initial process is hydrolysis, where the complex polymers are converted to simpler monomers by means of hydrolytic enzymes, whereas due to the complexity, the hydrolytic enzymes are unable to act on it efficiently and thus result in rate-limiting step (Kavitha et al, 2017a;Kavitha et al, 2017b;Kavitha et al, 2019a;Kavitha et al, 2019b). This limitation was overcome by different pretreatment methods, which alter the structure of biomass and make it easily accessible for hydrolytic enzymes.…”

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confidence: 99%

Indexing energy and cost of the pretreatment for economically efficient bioenergy generation

Preethi

Gunasekaran

2023

Front. Energy Res.

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The growing necessity for energy worldwide has led to the hunt for an interminable solution in the form of sustainable energy generation. To accomplish sustainability, these problems can be resolved using renewable waste biomass, which is readily accessible and low priced. Moreover, the ecological issue due to the disposal of this waste biomass into the environment is also counteracted by the use of this biomass for energy generation along with the substantial solid reduction for disposal. The presence of complex biopolymers in biomass, which hasten the hydrolysis step during energy generation, was enhanced by the application of a pretreatment method. The efficiency of the pretreatment methods was enhanced by maintaining the cost and energy usage since the commercialization of this method is largely limited. The major economic drivers are based on solid concentration and, thus, lead to higher capital costs. This study reveals the wide assortment of current progression in pretreatment techniques for treating waste biomass with special focus on combined and phase-separated pretreatment. Additionally, it converses the advantages and limitations of pretreatment methods. This pivotal investigation brings about the cost- and energy-effective conversion solution that paves the way for a sustainable energy system.

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Effect of low intensity sonic mediated fragmentation of anaerobic granules on biosurfactant secreting bacterial pretreatment: Energy and mass balance analysis

Cited by 31 publications

References 27 publications

A critical review on various feedstocks as sustainable substrates for biosurfactants production: a way towards cleaner production

A critical review on various feedstocks as sustainable substrates for biosurfactants production: a way towards cleaner production

The Influence of the Ultrasound Disintegration of Microalgal–Bacterial Granular Sludge on Anaerobic Digestion Efficiency

Indexing energy and cost of the pretreatment for economically efficient bioenergy generation

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