Pre-evaporative Fenton remediation of treated municipal wastewater for reuse purposes

The present study explored the application of evaporative technology as an alternative desalination technique for wastewater treatment plant effluent. In the experiments carried out, it was shown that evaporation allowed for extensive decontamination of wastewater treatment plant effluent as most in organic and organic contaminants were completely removed. Ammonia could be retained in the concentrate when pH was adjusted to values lower than 4; ho wever this led to increased nitrite volatility due to the formation of nitr ic oxide. Using an electronic nose, it was observed that evaporation gave r ise to a change in odour quality and quantity due to volatilisation of the volatile organic compounds present in the effluent. Remediation of these co mponents was carried out by Fenton oxidation prior to evaporation. A high r emoval was observed under the applied conditions of Fa(2+) = 25 mg l(-1), H 2O2 = 50 mg l(-1), pH = 3 and a reaction time of 2 hours.