Treatment of waters from the paper industry through the combination of photooxidative and microbiological processes
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Abstract
It was achieved degraded the pollutants of residual water from an industrial processes. First, a flocculation was realized and then the water was treated changing the conditions of the different treatments. Advanced Oxidation Processes were used obtaining the best results using UV light, ozone and 0.2 ml of H2O2, the time of irradiation was of 60 min, achieving a percentage of removal of 96 %. Other experiments were done, treating the samples with UV light, ozone and 0.1 ml of H2O2, maintaining these conditions for 15 min and 25 min, and then they were inoculated with a microbial consortium (Cryptomyces laurentii, Bacillus cereus, Pseudomonas fluorescens and Sphingomona paucimobillis) for 12 days. The percentages of removal were 67.5 % for 15 min and 75.7 % for 25 min. Another variant was tested under same conditions of photooxidative treatment, for 15 min and then it was inoculated with Cryptomyces laurentii, Bacillus cereus and Sphingomona paucimobillis for 15 days, achieving a percentage of removal of 45.4 %. After a time of photooxidative treatment with 25 min it was inoculated by Cryptomyces laurentii, Bacillus cereus, Pseudomonas fluorescens for a period of 15 days, there being achieved a percentage of removal of 45.0 %.
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