Wet air oxidation: past, present and future

Carbon materials and catalytic wet air oxidation of organic pollutants in wastewater

“…Alternatively, low temperature oxidation processes replace oxygen by stronger oxidants such as O 3 [9,10] or H 2 O 2 [9,11,12] in combination with an energy input to form reactive OH-radicals [13,14]. Several reviews on catalytic and non-catalytic WAO [4,5,[15][16][17][18][19], supercritical water oxidation (SCWO) [7,8,[20][21][22] and advanced oxidation processes (AOP) [23][24][25] are now available in literature.…”

“…For wastewater containing low to medium organic concentration, batch and continuous CWAO yielded satisfactory results in laboratory studies [4,5,[15][16][17][18][19]. Relatively mild operating conditions of temperature and pressure lead to substantially lower investment and operation cost.…”

Wet air oxidation of nitrobenzene enhanced by phenol

“…In the process of WAO, the waste is oxidized to CO 2 , H 2 O and low molecule acids at elevated temperatures (150-325°C) and pressures . With wastes of 2000 mg l À1 COD or above, the process is self-sustaining, and it is suitable to treat hazardous and non-biodegradable wastes (Luck, 1999).…”

Advanced Oxidation Processes in Food Industry Wastewater Treatment – A Review

“…In Japan, several companies have developed catalytic wet air oxidation technologies relying on heterogeneous supported noble metal catalysts (Harada et al, 1987;Ishii et al, 1994). In Europe, homogeneous CWAO processes such as Ciba-Geigy, LOPROX, ORCAN and ATHOS have already been developed in the 1990s (Luck, 1999).…”