Bioremediation of Melanoidins Containing Distillery Waste for Environmental Safety

Kumar, Vineet; Chandra, Ram

doi:10.1007/978-981-13-3426-9_20

Cited by 13 publications

(4 citation statements)

References 89 publications

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“…Therefore, the use of different methodologies, as various solvents, could provide a more complete composition analysis of the effluents studied here. As an example, Kumar and Chandra (2020) used acetone, ethyl acetate, isopropanol, methanol, ethanol, and n ‐hexane for extraction and posterior identification, by GC–MS, of organic compounds present on distillery effluents, being able to identify a wide range of compounds.…”

Section: Resultsmentioning

confidence: 99%

Aerobic post‐treatment of effluent from anaerobic reactors fed with residues from 1G and 2G sugarcane biorefineries

Procópio

Aquino

Adarme

2022

Water Environment Research

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This study aimed to evaluate an activated sludge system as a post‐treatment step of anaerobic effluents from the co‐digestion of sugarcane vinasse and hemicelluloses hydrolysate. The system consisted, initially, of a two‐stage anaerobic system followed by a continuously fed activated sludge, all in bench scale. After adaptation of aerobic microorganisms to effluent conditions, the anaerobic digestion was conducted in a single‐stage anaerobic reactor, increasing the influent organic loading rate (OLR) of activated sludge from 0.73 to an average of 2.36 gCOD/L·day. Under optimal conditions (12‐h hydraulic retention time [HRT]), a 62 ± 9% efficiency was observed on the aerobic post‐treatment, resulting in effluent chemical oxygen demand (COD) of 414.3 ± 95 mg/L. Overall efficiency of the combined system (anaerobic + aerobic) averaged 88 ± 3%. Influent and effluent characteristics were then analyzed by Folin‐Ciocalteau method, UV–Vis spectrophotometry, and gas chromatography–mass spectrometry (GC–MS) for identification of potentially toxic and recalcitrant compounds. Compounds that absorb light within the visible spectra were well removed by the combined treatment system. Most compounds identified by GC–MS in the influent were completely removed by aerobic microorganisms. Saturated fatty acids such as adipic acid, hexadecanoic acid, and octadecanoic acid were observed in the final effluent, as well as other potentially toxic compounds such as stigmasterol, di‐isobutyl phthalate, and benzene. Activated sludge proved to be an efficient post‐treatment for anaerobic co‐digestion, able to cope with changes of anaerobic effluent quality and providing a final effluent of stable organic load. However, phenol removal was not efficient and further studies could be performed to optimize its degradation. Practitioner Points Conventional activated sludge with a 12‐h HRT was capable of handling significant OLR variation, providing a final effluent with lower and stable COD concentration. Glucose addition for carbon supplementation was necessary during the start‐up of activated sludge. Compounds that absorb light within the visible spectra were mostly removed by the combined (anaerobic–aerobic) treatment system. Most potentially toxic compounds were well removed in the post‐treatment system. Saturated fatty acids, VFA, phenols, and low molecular weight aromatic compounds remained in the final effluent.

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Section: Resultsmentioning

confidence: 99%

Aerobic post‐treatment of effluent from anaerobic reactors fed with residues from 1G and 2G sugarcane biorefineries

Procópio

Aquino

Adarme

2022

Water Environment Research

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“…Biological treatment employs a range of microbes having different metabolic ways to degrade the inorganic and organic contaminants in a polluted matrix and, henceforth, is observed as eco-friendly, effectively cost technique for treatment and management of wastewater with the modest structural arrangement, wider implementation, easily functioning, and a little sludge generation [24][25][26][27][28][29]. Biological wastewater treatment methods are intended to eliminate nutrients, generally dissolved phosphorus as well as nitrogen [29]. The microorganisms could achieve decomposition under both aerobic as well as anaerobic circumstances [30].…”

Section: Microbial Wastewater Treatmentmentioning

confidence: 99%

Potential of Magnetite Nanoparticles on Dairy Effluent Nitrate and Phosphate Bioremediation

Salama

Beheary

Elaal

et al. 2021

Alfarama Journal of Basic & Applied Sciences

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Despite nanotechnology got a high public awareness due to its implementation in various human activities, the effect of nanoparticles on bacterial performance in wastewater treatment is still unclear. This study examines the role of magnetite nanoparticles (Fe 3 O 4 NPs) on the dairy effluent nitrate and phosphate bioremediation using diverse inoculum sources. Two inoculum sources (wastewater and sludge) were got from the dairy wastewater treatment plant unit. A culture was prepared to check the role and efficacy of Fe 3 O 4 NPs. After five days of incubation, the culture of dairy diverse inoculum sources was verified to be effective in effluent treatment. By applying sludge as an inoculum source, the reduction efficacy was enhanced up to 48.54% and 46.13% for nitrate and phosphate, respectively compared to control. In the case of applying wastewater as an inoculum source, the reduction was enhanced up to 64.12% and 36.85% for nitrate and phosphate, respectively compared to control. Furthermore, the bacterial abundance showed a significant variance between control and another sample (high abundance than control). Results revealed that Fe 3 O 4 NPs can improve the microbial growth of diverse inoculum sources which are efficient in the bioremediation of dairy effluent. Overall, the concentration (40 ppm) of Fe 3 O 4 NPs was obtained the optimal abundance for inoculum sources and the reduction of nitrate and phosphate as well.

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“…The divergence in the characteristics could be due to the use of different chemicals during pretreatment, hydrolysis, and fermentation stages, and depends on pretreatment‐specific criteria such as pretreatment type, biomass type, biomass loading, and pretreatment conditions. The recalcitrance and color of the wastewater is primarily attributed to the presence of melanoidins along with other organic compounds such as tannins, anthocyanins, and several other sugar degradation products 9,10 . Further details of the existing reports on 2G ethanol wastewaters with respect to different substrates, wastewater streams, and process conditions have already been reported in detail by Sreevathsan and Mudliar 3 .…”

Section: Introductionmentioning

confidence: 98%

“…The recalcitrance and color of the wastewater is primarily attributed to the presence of melanoidins along with other organic compounds such as tannins, anthocyanins, and several other sugar degradation products. 9,10 Further details of the existing reports on 2G ethanol wastewaters with respect to different substrates, wastewater streams, and process conditions have already been reported in detail by Sreevathsan and Mudliar. 3 The pretreatment process wastewaters from 2G ethanol production (2GEPPW) can be assumed to undergo treatments similar to 1G distillery wastewaters.…”

Section: Introductionmentioning

confidence: 99%

Effect of ozonation on biodegradability enhancement and biomethanation potential of pretreatment process wastewaters from 2G ethanol production

Sreevathsan

Crasta

Bhavana

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND The production of second‐generation (2G) ethanol from lignocellulosic biomass generates large quantities of high‐strength complex wastewaters from various stages of the process. An effective pretreatment is necessary in order to overcome the low biodegradability of these wastewaters for further biomethane recovery. The present study reports the effect of ozonation on the biodegradability enhancement and biomethanation potential of complex 2G ethanol pretreatment process wastewaters, from acid (H2SO4) and alkali (NaOH) pretreatment process. RESULTS Ozonation (9.33 g m−3) was performed for both acid and alkali pretreatment wastewaters at a flow rate of 10 L min−1 for 1 h. Ozonation of both wastewaters increased biodegradability index (BI) up to 36% along with minimal chemical oxygen demand (COD; 7 ± 3%), color (10 ± 4%), and toxicity (22.5 ± 7.5%) reduction. Biomethane potential tests were carried out for the control and ozonated wastewaters having BI > 0.4. The acid‐pretreatment wastewater indicated poor biomethanation potential due to high presence of sulfates (COD/SO4 ~ 3.0). However, ozonation of alkali‐pretreatment wastewater facilitated up to twofold enhancement in the cumulative methane volume, while the enhancement in the rate of methane production was found to be up to 47%. Fourier transform infrared spectroscopic analysis of control and ozonated wastewaters revealed the breakdown of complex organic molecules and aromatics to readily biodegradable intermediates. The kinetics of methane generation could be predicted by the modified Gompertz model. CONCLUSION The study demonstrated the efficacy of ozonation as an effective pretreatment option to facilitate biodegradability enhancement of 2G ethanol pretreatment process wastewaters. The enhancement in biodegradability was observed to enable subsequent biogas recovery via anaerobic digestion along with COD removal. © 2023 Society of Chemical Industry (SCI).

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Bioremediation of Melanoidins Containing Distillery Waste for Environmental Safety

Cited by 13 publications

References 89 publications

Aerobic post‐treatment of effluent from anaerobic reactors fed with residues from 1G and 2G sugarcane biorefineries

Aerobic post‐treatment of effluent from anaerobic reactors fed with residues from 1G and 2G sugarcane biorefineries

Potential of Magnetite Nanoparticles on Dairy Effluent Nitrate and Phosphate Bioremediation

Effect of ozonation on biodegradability enhancement and biomethanation potential of pretreatment process wastewaters from 2G ethanol production

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