Application of catalytic wet air oxidation for the treatment of H-acid manufacturing process wastewater

Zhu, Wanpeng; Ye, Bin; Li, Zhonghe; Jiang, Zhanpeng; Yin, Tong

doi:10.1016/s0043-1354(01)00419-5

Cited by 58 publications

(26 citation statements)

References 7 publications

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“…One would expect more intermediate products amenable to biodegradation with temperature, but this was not the case with this model pollutant; maximum biodegradability was obtained at T = 473 K. Lower biodegradability observed at higher temperatures can probably be attributed to the presence of intermediates with either lower metabolic values or inhibitory effects. Zhu et al [146] studied wet-air oxidation of a H-acid solution in the presence of various catalytic systems. The initial BOD 5 /COD of the H-acid solution was 0.02, which indicated that it had poor biodegradability.…”

Section: Biodegradability/toxicity Of Cwao Treated Effluentsmentioning

confidence: 99%

Catalytic wet-air oxidation processes: A review

2007

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Section: Biodegradability/toxicity Of Cwao Treated Effluentsmentioning

confidence: 99%

Catalytic wet-air oxidation processes: A review

2007

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“…Good catalytic systems were found and used for the oxidation of model compounds (mainly phenol and carboxylic acids) as well for the oxidation of wastewater. In this work we used Pt/C and Ir/C catalysts to study the degradation of an OMW by CWAO, because we have previously demonstrated their excellent activity and stability in the oxidation of low molecular weight carboxylic acids (Gomes et al, 2000(Gomes et al, , 2002a(Gomes et al, , b, 2004, organic compounds which are very refractory to oxidation, and normally found as end products of the oxidative degradation of several types of wastewater (Belkacemi et al, 2000;Zhu et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Catalytic wet air oxidation of olive mill wastewater

2007

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The objective of this work was to study the suitability of catalytic wet air oxidation (CWAO) for the treatment of olive mill wastewater (OMW). Accordingly, experiments were performed in a high pressure reactor at 100ºC and 200ºC under an oxygen partial pressure of 6.9 bar, using carbon supported platinum (1wt.% Pt) and iridium (5 wt.% Ir) catalysts prepared by incipient wetness impregnation. Both catalytic systems showed a very high activity in the total organic carbon (TOC) removal of the effluent, an increase in TOC removal relatively to non-CWAO being observed. At 200ºC, complete TOC and colour removal was obtained with the Pt/C catalyst after 8 h of reaction. At 100ºC, the results indicate that a certain fraction of compounds in the effluent (low molecular weight recalcitrant carboxylic acids) could not be removed even after prolonged reaction time. A kinetic model was developed taking into account catalytic and noncatalytic reaction, formation of refractory compounds and catalyst deactivation. A very good agreement between the model results and the CWAO experimental data at 200ºC was found. The results obtained in this work indicate that Pt/C is a promising catalyst for the CWAO of OMW.

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“…In fact, usually several compounds are present in the real wastewater, but when AOPs are used to pre-treat the wastewater before a biological unit, it is necessary to have a selective elimination of only the target chemicals (hardly biodegradable, inhibitor or ecotoxic compounds), in order to limit the costs of the pretreatment [2,[13][14][15]. Catalytic AOPs find application in various areas, for example in the treatment of wastewater from (i) dyeing and printing [16][17][18], (ii) Kraft-pulp bleaching [15,19,20], (iii) petrochemical industry [21], (iv) olive milling [22], (v) H-acid manufacturing process [23] and (vi) wood pyrolysis and cooking plant [24], although the commercial processes are still limited [12].…”

Section: Introductionmentioning

confidence: 99%

Wet hydrogen peroxide catalytic oxidation (WHPCO) of organic waste in agro-food and industrial streams

2005

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This review discusses the use of iron-or copper-based solid catalysts in the wet oxidation using H 2 O 2 as oxidant of organic molecules present in agro-food and industrial waste aqueous streams. After an introduction on the advantages and limits of using wet hydrogen peroxide catalytic oxidation (WHPCO) as opposite to wet air catalytic oxidation (WACO), the contribution shortly analyses recent results in the field in order to evidence new trends and open issues. More specific examples discussed regard the performances of Fe/zeolite and Fe-containing pillared clays in the oxidation of selected molecules (p-coumaric acid, propionic acid) of relevance for the treatment of organic waste from agro-food production (with reference especially to olive oil milling wastewater). The application of WHPCO in the treatment of complex effluents from electronic industry is also shortly discussed.

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Application of catalytic wet air oxidation for the treatment of H-acid manufacturing process wastewater

Cited by 58 publications

References 7 publications

Catalytic wet-air oxidation processes: A review

Catalytic wet-air oxidation processes: A review

Catalytic wet air oxidation of olive mill wastewater

Wet hydrogen peroxide catalytic oxidation (WHPCO) of organic waste in agro-food and industrial streams

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