Ozonation as a Post-Treatment Step for Tannery Wastewater to Reduce Foam Formation in a River

摘要

Foam formation in a transboundary river, accompanied by protests of local stakeholders, made it necessary to investigate measures to quantify and reduce foam formation. It was previously reported that 80% of the occurring foam formation was provided by three tanneries. Therefore, laboratory-scale experiments were run with wastewater from the three tanneries for six months to investigate the influence of ozonation and biological post-treatment on foam formation. Ozonation with biological post-treatment showed a significant positive effect, with up to 50% additional COD reduction and the elimination of 70% of the foam formation on river catchment scale. Biological post-treatment alone did not show any effect on the foam formation. The new legal standards for tannery wastewater can be kept at the investigated tanneries through ozonation and biological post-treatment.View full textDownload full textKeywordsOzone, COD Reduction, Industrial Wastewater, Surface TensionRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/01919512.2012.713311