Evaluation and kinetic study on enzyme supplementation to biological treatment of vegetable tanning process wastewater

Balakrishnan, Abirami; Kanchinadham, Sri Bala Kameswari; Chitra, K. C.

doi:10.1007/s13762-018-1985-3

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…In the treated effluent CWRVT, many peaks with high m / z fragments were detected. The ions detected at m / z 525, 563, 581, and 585 corresponds to dimers and trimers of epicatechin and the ions at m / z from 701 to 879 corresponds to condensed tannin units. , Procyanidins were reported to be detected at the m / z of 679, 863, 575, and 593 …”

Section: Results and Discussionmentioning

confidence: 99%

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Studies on the Effect of Bacterial Tannase Supplementation to Biodegradation of Tannins in Tannery Wastewater

Balakrishnan

Kanchinadham

Chitra

2021

Ind. Eng. Chem. Res.

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Tannins present in the vegetable tanning process wastewater (VTW) affect the aerobic microbes and reduce the treatment efficiency in the tannery effluent treatment plants. Studies were performed with the supplementation of crude tannase enzyme to improve the efficiency of aerobic treatment of composite wastewater from raw to vegetable tanning process (CWRVT). Screening, isolation, optimization of growth conditions, and sequencing of the bacterial isolate Bacillus nitratireducens were studied. Aerobic reactors were operated in continuous mode for a period of 210 days, with and without tannase supplementation. The reactors with and without tannase supplementation showed 84%− 88% and 44%−47% tannin removal, respectively, for a maximum organic loading rate (OLR) of 30.5 g COD/L d with a tannin concentration of 1000 mg/L. Confirmation of tannin degradation was done with the help of electrospray ionization−mass spectrometry (ESI-MS) and pyrogallol analysis. The kinetic parameters were derived based on Contois model considering tannin as a substrate. For the treatment of 1 m 3 of CWRVT, the supplementation of tannase enzyme will add an additional cost of Rs.30.58/-toward the cost of chemicals in the overall operation and maintenance cost of the treatment process. This study suggests that supplementation of tannase enzyme in existing treatment plants will enhance the efficiency of tannin removal.

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Section: Results and Discussionmentioning

confidence: 99%

“…The ions detected at m/z 525, 563, 581, and 585 corresponds to dimers and trimers of epicatechin and the ions at m/z from 701 to 879 corresponds to condensed tannin units. 42,43 Procyanidins were reported to be detected at the m/z of 679, 863, 575, and 593. 44 In the treated effluent of Enz sup -CWRVT, many low m/z fragments were detected.…”

Section: 3mentioning

confidence: 99%

Studies on the Effect of Bacterial Tannase Supplementation to Biodegradation of Tannins in Tannery Wastewater

Balakrishnan

Kanchinadham

Chitra

2021

Ind. Eng. Chem. Res.

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“…When vegetable tannin wastewater (VTW) was treated under aerobic conditions with and without tannase enzyme as an additive, marked improvements were noted in COD removal (27%-51.4%), BOD5 (29%-63%), and tannin (34.1%-57%) ANNUAL LITERATURE REVIEW when tannase was added (Balakrishnan, Kanchinadham, & Kalyanaraman, 2019). The authors also reported the yield coefficient (0.436 mg cells per mg COD), maximum specific growth rate (0.068 per h), a half-saturation (K s ) constant of 345 mg/L, and an inhibition (K i ) constant of 46 mg/L under the tannase treatment scenario.…”

Section: Annual Literature Reviewmentioning

confidence: 99%

Food‐processing wastes

Frenkel

Cummings

Maillacheruvu

et al. 2020

Water Environment Research

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Literature published in 2018 and literature published in 2019 related to food-processing wastes treatment for industrial applications are reviewed. This review is a subsection of the Treatment Systems section of the annual Water Environment Federation literature review and covers the following food-processing industries and applications: general, meat and poultry, fruits and vegetables, dairy and beverage, and miscellaneous treatment of food wastes.

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“…Gallic acid has extended its utilization as a valuable antibacterial chemical, antitumor drug, antioxidant agent, food preservative, and analgesic reliever. − In addition, gallic acid is used as an important constituent in photography and printing inks. Furthermore, tannase has been introduced for use in environmental fields, for instance, the treatment of polyphenols in tannery effluents. , The abilities of gallic acid production and tannin removal make tannase useful for various commercial applications in food, beverage, tannery, pharmaceutical, animal feed, and chemical industries. − …”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, tannase has been introduced for use in environmental fields, for instance, the treatment of polyphenols in tannery effluents. 15,16 The abilities of gallic acid production and tannin removal make tannase useful for various commercial applications in food, beverage, tannery, pharmaceutical, animal feed, and chemical industries. 17−19 Despite the previously mentioned benefits, the enzymecatalyzed transformation of tannin using tannase still faces several key challenges.…”

Section: ■ Introductionmentioning

confidence: 99%

Construction of a Tannase-Immobilized Magnetic Graphene Oxide/Polymer Nanobiocatalyst with Enhanced Enzyme Stability for High-Efficiency Transformation of Tannins

Huan

Liu

et al. 2022

ACS Sustainable Chem. Eng.

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Highly efficient biotransformation of natural compounds into sustainable biochemical products has attracted great attention. The integration of nanoscience and biotechnology provides attractive solutions for this purpose. Herein, we report the fabrication of a nanobiocatalyst employing a magnetic graphene oxide/polymer nanocomposite as a robust carrier for immobilizing the tannase enzyme, which catalyzes the bioconversion of tannin into gallic acid and glucose. Attributed to the covalent immobilization and propitious interface properties of the coated polymers comprising polyethylenimine and sodium hyaluronate, the nanobiocatalyst is stable without compromising the enzymatic activity. The nanobiocatalyst exhibits 91.8% activity of original tannase and a high enzyme bound amount of 356.8 mg g −1 . The stability tests at variable temperatures (30−80 °C) and under pH conditions (4.0−9.0), various inhibitors, and a long-term storage process (25 days) reveal that the heterofunctional support and surface microenvironment facilitate better stability, adaptability, and tolerance ability of the nanobiocatalyst modified with a multicomponent polymer in comparison to the free enzyme and the nanobiocatalyst modified with the monocomponent polyethylenimine. The nanobiocatalyst maintains 94.2% of its initial activity after 10 consecutive uses and is 100% recoverable by applying an external magnet. Moreover, the nanobiocatalyst is used to hydrolyze 96.5 and 95.1% tannins in extracts from Chinese Torreya grandis testa and cake, respectively. These results establish the practicability of magnetic graphene oxide-based supports for immobilizing tannase and the promising application of immobilized tannase for efficient tannin hydrolysis.

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Evaluation and kinetic study on enzyme supplementation to biological treatment of vegetable tanning process wastewater

Cited by 7 publications

References 25 publications

Studies on the Effect of Bacterial Tannase Supplementation to Biodegradation of Tannins in Tannery Wastewater

Studies on the Effect of Bacterial Tannase Supplementation to Biodegradation of Tannins in Tannery Wastewater

Food‐processing wastes

Construction of a Tannase-Immobilized Magnetic Graphene Oxide/Polymer Nanobiocatalyst with Enhanced Enzyme Stability for High-Efficiency Transformation of Tannins

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