Para-chlorophenol containing synthetic wastewater treatment in an activated sludge unit: Effects of hydraulic residence time

Kargı, Fikret; Konya, Isil

doi:10.1016/j.jenvman.2006.04.002

Cited by 31 publications

(11 citation statements)

References 36 publications

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“…Mansouri et al [25] reported a similar effect of the cycle time and aeration on the COD removal efficiency in the SBR reactor, so that a maximum COD removal efficiency was achieved 87.18% at the cycle time and aeration time of 6.5 h and 50 min/h, respectively. A sequencing batch flexible fiber biofilm reactor was examined for the treatment of dairy wastewater at three different OLR (0.4, 1.27 and 2.74 kg COD m −3 d −1 ) and 24 h aeration time by Abdulgader and coworkers [26]. An inverse relationship between OLR and COD removal efficiency was observed in this study.…”

Section: -1 Carbon Removalsupporting

confidence: 50%

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Process modeling and optimization of biological removal of carbon, nitrogen and phosphorus from hospital wastewater in a continuous feeding & intermittent discharge (CFID) bioreactor

Pirsaheb

Mohamadi

Mansouri

et al. 2015

Korean J. Chem. Eng.

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We evaluated the feasibility and treatment performance of a continuous feeding and intermittent discharge (CFID) bioreactor treating real hospital wastewater with the emphasis on simultaneous carbon, nitrogen and phosphorus (CNP) removal. The experiments were based on a central composite design (CCD) and analyzed by response surface methodology (RSM). To analyze the process, three significant variables, aeration time (2-4 h), mixing time without aeration (30-90 min) and MLSS concentration (2,000-6,000 mg/l), were studied. Results show that an increase in aeration time increased the nitrogen and phosphorous removal efficiency. However, when the aeration time was more than 3 h, the efficiency of phosphorous removal was decreased due to insufficient acidification. A similar scenario was observed when mixing time was increased for phosphorus and nitrogen removal efficiency. MLSS had a positive effect on all the responses. Under optimal conditions, the concentrations of quality parameter in the influent in average were recorded as 586 mg COD/l, 296 mg BOD 5 /l, 97 mgTN/l and 16.47 mg TP/l, which yields the following removal efficiencies, 95.6%, 98.3%, 88.0% and 92.0%, respectively.

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Section: -1 Carbon Removalsupporting

confidence: 50%

“…Also, the reverse impact of the COD in on COD removal was observed as the variable increased. Kargi and Konya [26] found that stepwise increase in HRT from 5 to 15 h resulted about 40 percent increase in COD removal and the efficiency remained almost constant at larger HRT levels. Meng et al [27] also reported similar results.…”

Section: -1 Carbon Removalmentioning

confidence: 96%

Process modeling and optimization of biological removal of carbon, nitrogen and phosphorus from hospital wastewater in a continuous feeding & intermittent discharge (CFID) bioreactor

Pirsaheb

Mohamadi

Mansouri

et al. 2015

Korean J. Chem. Eng.

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“…Chlorophenols and their chlorinated derivatives are the most widely used industrial toxic compounds. These pollutants originate from a large number of different sources, such as intermediates in the synthesis of the higher chlorinated congeners, certain dyes, and pesticides (Kargi and Konya, 2007;Limaye et al, 2008;Montserrat et al, 2007). Several technologies have been developed to transform these pollutants into non-toxic products.…”

Section: Introductionmentioning

confidence: 99%

P‐Chlorophenol Wastewater Treatment by Microwave‐Enhanced Catalytic Wet Peroxide Oxidation

Zhao¹,

Lv²,

Jin³

et al. 2010

Water Environment Research

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A microwave-enhanced catalytic wet peroxide oxidation (MW-CWPO) technology was investigated to treat a high concentration of p-chlorophenol wastewater under a mild condition. The MW-CWPO experiments were carried out in a microwave autoclave using copper(II) oxide (CuO)-loaded active carbon as a catalyst. The p-chlorophenol was directly ring-opened within 5 minutes at 343 K and 0.3 MPa and then mineralized to carbon dioxide and water. More than 90% of the total organic carbon was removed within 15 minutes. The reaction activation energy (E a ) of hydrogen peroxide (H 2 O 2 ) decomposition was decreased from 47.7 to 43.1 kJ/mol under microwave irradiation. The H 2 O 2 catalytic decomposition was fitted to a second-order reaction under microwave irradiation, while it followed a first-order reaction without microwave irradiation. The experimental results indicate that the MW-CWPO method has significant potential applications for a high concentration of pchlorophenol wastewater. Water Environ. Res., 82, 120 (2010).

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“…The effect of HRT on the conventional activated sludge treatment (CAS), applied to a synthetic wastewater, containing a highly persistent compound, was investigated by Kargi and Konya [7]. In their experiments, the influence of HRT, ranging from 5 to 30 h, on process performance was evaluated after reaching steady-state conditions, which took about 2-3 weeks per experiment.…”

mentioning

confidence: 99%

Is hydraulic retention time an essential parameter for MBR performance?

Viero

Sant’Anna

2008

Journal of Hazardous Materials

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Para-chlorophenol containing synthetic wastewater treatment in an activated sludge unit: Effects of hydraulic residence time

Cited by 31 publications

References 36 publications

Process modeling and optimization of biological removal of carbon, nitrogen and phosphorus from hospital wastewater in a continuous feeding & intermittent discharge (CFID) bioreactor

Process modeling and optimization of biological removal of carbon, nitrogen and phosphorus from hospital wastewater in a continuous feeding & intermittent discharge (CFID) bioreactor

P‐Chlorophenol Wastewater Treatment by Microwave‐Enhanced Catalytic Wet Peroxide Oxidation

Is hydraulic retention time an essential parameter for MBR performance?

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