Study of Metalworking Fluids Biodegradability Potential Enhancement by the Prior Application of Ozone

Abstract:

The increases in biological mineralization of selected Metalworking fluids (MWF) pre-treated by ozone were investigated. There were studied 11 different fluids four of emulsion types, four of semi-synthetics and three of synthetic types. Expectations according to the literature review that the pre-treatment enhance the biodegradability of the metalworking fluids were not confirmed in 7 samples. Only 4 samples achieved after ozone pre-treatment better biological degradation. Enhanced biodegradability level after ozone pre-treatment step was observed in three emulsions (Samples 1, 2 and 3) and one semi-synthetics (Sample 7). While nontreated soluble oils reached biodegradability level from 45 to 73 %, after 1 hour of ozone treatment the biodegradability increased from 65 to 82 %. Semisynthetic metalworking fluid without any treatment reached 56 % of the biodegradability level. After one hour of ozone application increased the biodegradability level to 74 % and after 2 hours to 82 %. During ozone treatment it was observed the destabilization of emulsions in half of tested samples.

• Periodical: Key Engineering Materials (Volume 737)
• Pages: 422-427
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.737.422
• Online since: June 2017
• Authors: Kristina Gerulova, Maroš Soldán, Zuzana Szabova*
• Keywords: Biodegradability, Metalworking Fluids, Ozone

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