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

作者：Thill Patrick G; Ager Duane K; Vojnovic Borivoj; Tesh Sarah J; Scott Thomas B; Thompson Ian P^*

来源：Water Research, 2016, 93: 214-221.

DOI：10.1016/j.watres.2016.02.028

• Wastewater treatment
• Biological treatment
• Electron beam irradiation
• Zero-valent nano iron
• Metalworking fluid
• COD

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.

• 出版日期2016-4-15