A reliable monitoring of the biocompatibility of an effluent along an oxidative pre-treatment by sequential bioassays and chemical analyses

Decontamination of industrial wastewater from sugarcane crops by combining solar photo-Fenton and biological treatments

“…This agrees with that reported by Amat et al, [24] and Sirtori et al, [10] who found in a similar study with different types of compounds that the detoxification of wastewater was obtained when the removal of the active recalcitrant elements by means of the oxidation pro- cess was done, indicating that the greater part of the toxicity of the mixture must be attributed to these compounds and that the by-products of the oxidation do not have inhibitory effects on the microorganisms present in sludge. The evidence provided by HPLC detection of Diuron and 2,4-D suggests that the photo-Fenton process rapidly removes these toxic compounds, transforming them into innocuous molecules; furthermore, an accumulation of toxic intermediates does not occur because they are also effectively degraded during the photo-Fenton process.…”

Photochemical degradation of carbofuran and elucidation of removal mechanism

“…These processes could be applied as the sole treatment process or as a pretreatment for improving the biodegradability of pesticide containing wastewater prior to the biological treatments [6][7][8]. Several studies have proven that AOPs are promising and also attractive alternatives in the treatment of organic pollutants that are either toxic or refractory to the biological treatments [9][10][11][12].…”

Economic evaluation of the photo-Fenton process. Mineralization level and reaction time: The keys for increasing plant efficiency

“…During the initial oxidative process, toxic or non-biodegradable compounds in wastewater are converted into intermediates that can be easily degraded during the subsequent biological treatment [9]. For this purpose, biodegradability tests are needed to guarantee that intermediates generated during the AOP do not cause any damage or accumulation in the biological system [10]. Many of these assays are based on the measurement of biodegradation capability of different species (mostly activated sludge) [11].…”