Removal of Fatty Acids from Palm Oil Effluent by Combined Electro-Fenton and Biological Oxidation Process

Babu, B. Ramesh; Meera, K. Seeni; Venkatesan, P.; Sunandha, D.

doi:10.1007/s11270-009-0292-5

Cited by 23 publications

(5 citation statements)

References 24 publications

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“…Parilti in 2010 21 investigated 38 % enhancement in BOD5/COD ratio by adopting solar oxidation by hydrogen peroxide process. Babu et al 22 reported 35 % and 48 % depletion in BOD5 and COD respectively by electro-fenton process resulting in 16 % rise in BOD5/COD ratio. According to our treatment strategy, oxidation by hydrogen peroxide time and dose were kept low intentionally to facilitate subsequent biological degradation in a view to achieve a plenty of enhancement in BOD5/COD ratio and tiny depletion in TCOD.…”

Section: Resultsmentioning

confidence: 99%

Cycle Time Minimization During Renewable Methane Production from H2O2 Enhanced Anaerobic Co-Digestion of Petrochemical Wastewater in Continuous Stirred Tank Reactor

Siddique¹,

Zularisam²

2013

Asian J. Chem.

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Investigations explored that specifically in case of recalcitrant substrates; the hydrolysis is a rate-defining stage in anaerobic digestion 1. To perk up biochemical degradation competence of numerous refractory materials, a quantity of pretreatment might be helpful 2. Such pretreatments can transpose various refractory organic matters to biodegradable organic ones, which can be easily degraded afterwards in biological reactor 3. Several pretreatments have been performed including thermal hydrolysis, UV treatment, particle size diminution, ultrasonic effect, ozonization, oxidation by hydrogen peroxide etc. Oxidation by hydrogen peroxide (OHP), a defensible technology appeared to cover the gap between wastewater technologies treating the effluents with moderate to high refractory organic matter content and low biodegradability 4. Additionally, this technology is opposite to treat all kinds of organic wastewater 5. Compounds such as halogenated organics, chloramines, adsorbable organic halide, fats and greases, phenols, mono and polycyclic aromatics, naphthalene, polychlorinated biphenyls, dyes, pesticides and herbicides etc. are effectively treated in the industrial oxidation by hydrogen

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Section: Resultsmentioning

confidence: 99%

Cycle Time Minimization During Renewable Methane Production from H2O2 Enhanced Anaerobic Co-Digestion of Petrochemical Wastewater in Continuous Stirred Tank Reactor

Siddique¹,

Zularisam²

2013

Asian J. Chem.

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“…serves as a source for hydroxyl radicals, as reported by Babu et al (2010). Hence, the doping of Fe on SnO 2 /Ti anode may increase radical concentration to a great extent, leading to the efficient degradation of organic pollutants.…”

Section: Electro-oxidation Mechanismmentioning

confidence: 86%

“…produces hydroxyl radical, which has a strong affinity for organic bond rupture (Babu et al 2010). Hence, Fe can be considered as a better dopant.…”

Section: Introductionmentioning

confidence: 99%

A novel approach for textile dye degradation by zinc, iron–doped tin oxide/titanium moving anode

Vignesh

Sridhar

Gokul

et al. 2013

Int. J. Environ. Sci. Technol.

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The present contribution reports a moving iron (Fe), zinc (Zn)-doped tin oxide/titanium (SnO 2 /Ti) anodebased system designed and operated for the electro-oxidation of methyl orange dye effluent. Electrochemical oxidation of the dye was carried out at a current density of 1.8 A/dm 2 for 120 min. Similar experiments were repeated with pure SnO 2 -based static and moving anode-based systems and the Fe, Zn-doped SnO 2 static anode-based electro-oxidation system. Post oxidation, the surface of the electrodes was critically examined by scanning electron microscopy. Dye samples were analysed at regular intervals during the electro-oxidation process by chemical oxygen demand and colour removal measurements and characterized by UV-Vis spectroscopy and Fourier transform infrared spectroscopy at the end of the oxidation process. The obtained results elucidate the superiority of Fe, Zn-doped SnO 2 /Ti moving anode-based system for methyl orange dye effluent electro-oxidation. The moving anode prevents passive layer formation and decreases polarization resistance. Doping of Fe and Zn provides the anode-enhanced mechanical strength and electrocatalytic activity. The combined effects of axial anode movement and doping are responsible for improved performance of the moving anode system reported in this contribution.Keywords Electrochemical treatment Á SnO 2 -doped electrodes Á Methyl orange Á Chemical oxygen demand (COD) Á Scanning electron microscopy (SEM) Á Fourier Transform infrared spectroscopy (FT-IR)

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“…For example, in EFOPs, cathodic reactions generate the Fenton reagent: the cathode not only reduces Fe 3+ to Fe 2+ but also generates H 2 O 2 by reducing O 2 . For the reduction of Fe 3+ , stainless steel and graphite are frequently used as cathode materials. − Generally, carbonaceous electrodes are employed for the reduction of O 2 to H 2 O 2 ; the gas diffusion electrode (GDE) configuration has recently been adopted for further enhancing the H 2 O 2 production efficiencies. ,− Additionally, several cathode materials reportedly activate oxidants such as S 2 O 8 2– , HOCl, and H 2 O 2 . Shin et al tested Al, SS, Cu, Sn, and Ti for cathodic conversion of S 2 O 8 2– into SO 4 •– , where Ti exhibited the best performance .…”

Section: Basics Of Eopsmentioning

confidence: 99%

Electrochemical Oxidation Processes for the Treatment of Organic Pollutants in Water: Performance Evaluation Using Different Figures of Merit

Lee

Seo

et al. 2022

ACS EST Eng.

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Electrochemical oxidation processes (EOPs) have gained attention as promising technologies for the removal of refractory organic pollutants in water and wastewater. Although many reviews have been reported on EOPs, to date, no review has been mainly focused on the energy efficiencies of EOPs. Accordingly, herein, EOPs for the treatment of organic pollutants in water and wastewater are reviewed, and the performances of different EOPs in terms of energy efficiencies are evaluated using various figures of merit. The basic principles of EOPs are briefly introduced, and indicators for the performance evaluation of EOPs are analyzed based on the fundamentals and statistical databases of EOPs obtained from the literature. Electrical energy per order (EE/O) and electrical energy per mass (EE/M) have been widely used to measure the energy efficiencies of EOPs. However, statistical analysis indicates that EE/O is a more suitable index in this regard than EE/M because it better represents the kinetics of pollutant degradation by EOPs, thereby mitigating the influence of the initial organic load on the performance evaluation of EOPs. EOPs modified using Fenton's reagent or external supplies of energy (or chemicals) exhibit higher energy efficiencies than those of anodic oxidation processes due to the existence of additional reactions or synergistic mechanisms for the generation of reactive oxidants. In addition to the evaluation of the energy efficiencies of different types of EOPs, the effects of electrode materials and electrolysis conditions, such as current density, pH, anions, and additive concentrations, on the energy efficiencies of EOPs are discussed. We believe that our review will provide useful information and insights for choosing the optimal types and conditions of EOPs for pollutant removal.

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Removal of Fatty Acids from Palm Oil Effluent by Combined Electro-Fenton and Biological Oxidation Process

Abstract: The main objective of this study was to find out a cost-effective treatment methodology for

Cited by 23 publications

References 24 publications

Cycle Time Minimization During Renewable Methane Production from H2O2 Enhanced Anaerobic Co-Digestion of Petrochemical Wastewater in Continuous Stirred Tank Reactor

Cycle Time Minimization During Renewable Methane Production from H2O2 Enhanced Anaerobic Co-Digestion of Petrochemical Wastewater in Continuous Stirred Tank Reactor

A novel approach for textile dye degradation by zinc, iron–doped tin oxide/titanium moving anode

Electrochemical Oxidation Processes for the Treatment of Organic Pollutants in Water: Performance Evaluation Using Different Figures of Merit

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