Journal
CHEMOSPHERE
Volume 230, Issue -, Pages 449-461Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.05.067
Keywords
Biomethanated distillery wastewater (BMDWW); Ozonation; Zero valent iron nanoparticles (nZVI); Biodegradability index (BI); Anaerobic oxidation (AnO); Aerobic oxidation(AO)
Categories
Funding
- Department of Science and Technology
- CSIR-NEERI
- ORAIPL (Ozone Research & Application India Pvt. Ltd)
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The effectiveness of O-3, O-3/Fe2+, and O-3/nZVI processes on biomethanated distillery wastewater (BMDWW) was evaluated in terms of biodegradability index (BI) enhancement, biofuel production, COD, color & toxicity reduction. A significant increase in biodegradability, COD, color and toxicity reduction was observed in O-3/nZVI compared with O-3, O-3/Fe2+ due to more hydroxyl radical production. The O-3/nZVI pretreated wastewater with enhanced BI (up to 0.71) showed 60% COD removal with additional biogas generation (64% methane content). From the Gas Chromatography Mass Spectrometry (GC-MS) analysis, 18 foremost organic compounds were predominantly detected in the raw distillery wastewater. The disappearance of the corresponding FTIR (Fourier Transform Infrared Spectroscopy) & GC-MS spectra during pretreatment processes signified the degradation or transformation of the recalcitrant present in the distillery wastewater. Subsequent (AnO + AO, AO) of pretreated BMDWW resulted in biodegradation rate enhancement by (1.83, 1.67), (3.5, 2.4) and (4.7, 2.9) times for O-3, O-3/Fe2+ and O-3/nZVI processes respectively. (C) 2019 Elsevier Ltd. All rights reserved.
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