Hybrid biological, electron beam and zero-valent nano iron treatment of recalcitrant metalworking fluids

TitleHybrid biological, electron beam and zero-valent nano iron treatment of recalcitrant metalworking fluids
Publication TypeJournal Article
Year of Publication2016
AuthorsThill PG, Ager DK, Vojnovic B, Tesh SJ, Scott TB, Thompson IP
JournalWater Research
Volume93
Pagination214-221
Date PublishedApr
Type of ArticleArticle
ISBN Number0043-1354
Accession NumberWOS:000372940200024
KeywordsADVANCED OXIDATION PROCESSES, BIOAVAILABILITY, Biodegradation, Biological treatment, COD, Electron beam irradiation, IRRADIATION, METAL, Metalworking fluid, nanoparticles, remediation, REMOVAL, toxicity, WASTE-WATER TREATMENT, Wastewater treatment, Zero-valent nano iron
Abstract

Hybrid approaches for the remediation and detoxification of toxic recalcitrant industrial wastewater were investigated. The focus was waste metalworking fluid, which was selected as a representative model of other waste streams that are toxic, recalcitrant and that require more sustainable routes of safe disposal. The hybrid approaches included biodegradation, electron beam irradiation and zero-valent nano iron advanced oxidation processes that were employed individually and in sequence employing a factorial design. To compare process performance operationally exhausted and pristine metalworking fluid were compared. Sequential hybrid electron beam irradiation, biological, nanoscale zero-valent iron and biological treatment lead to synergistic detoxification and degradation of both recalcitrant streams, as determined by complementary surrogates and lead to overall improved COD removal of 92.8 +/- 1.4% up from 85.9 +/- 3.4% for the pristine metalworking fluid. Electron beam pre-treatment enabled more effective biotreatment, achieving 69.5 +/- 8% (p = 0.005) and 24.6 +/- 4.8% (p = 0.044) COD reductions. (C) 2016 Published by Elsevier Ltd.

Alternate JournalWater Res.