The removal of formaldehyde from concentrated synthetic wastewater using O3/MgO/H2O2 process integrated with the biological treatment

Moussavi, Gholamreza; Yazdanbakhsh, Ahmadreza; Heidarizad, Mahdi

doi:10.1016/j.jhazmat.2009.06.090

Cited by 96 publications

(53 citation statements)

References 43 publications

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“…During the two-stage coagulation, the induction of these phenomena is inextricably connected with the formation of increased quantities of sediments, which is not a desirable effect in the operational practice on the actual installation. By contrast, the pre-oxidation with hydrogen peroxide, the presence of which increases neither the quantity of burdensome post-processing sediments nor the secondary salinity of the pretreated wastewater flux, is also an effective way to increase the level of both COD and BOD 5 reduction during wastewater treatment [36,38]. Hydrogen peroxide is able to make selective and full oxidation and mineralisation of some organic compounds contained in the pool of pollutant load, which is applicable to decrease total chemical toxicity [34][35][36][37][38].…”

Section: Resultsmentioning

confidence: 99%

“…By contrast, the pre-oxidation with hydrogen peroxide, the presence of which increases neither the quantity of burdensome post-processing sediments nor the secondary salinity of the pretreated wastewater flux, is also an effective way to increase the level of both COD and BOD 5 reduction during wastewater treatment [36,38]. Hydrogen peroxide is able to make selective and full oxidation and mineralisation of some organic compounds contained in the pool of pollutant load, which is applicable to decrease total chemical toxicity [34][35][36][37][38]. The use of hydrogen peroxide induces oxidation and combining the released particulates of organic and mineral matter in larger aggregations, which also affects the final effectiveness of eliminating colloid-suspension dispersions [36].…”

Section: Resultsmentioning

confidence: 99%

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Research on physico-chemical pretreatment of wastewater from the production of wood coating materials

Żak

Rauckyte-Żak

Laurinavičius

et al. 2014

Ecological Chemistry and Engineering S

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This paper presents the results of the research conducted on the installation designed for physico-chemical pretreatment of technological wastewater in the volume of up to 5.0 m 3 /day discharged from the production of protective and decorative coating materials used for wooden surfaces. The subject-matter installation constructed on a mobile pallet, consisted of a storage-averaging tank where concentrations were equalised with the use of circulation aeration and mixing. A variant, preliminary pre-oxidation with the use of hydrogen peroxide was conducted in this tank. A substantial installation set for the wastewater treatment plant consisted of two preliminary tube reactors, one cylindrical-conical processing reactor, stations for preparing and dispensing reagents and the sediment dewatering station. Considerable reductions in main chemical indicators of water pollution were obtained in the installation: both total suspended solids (TSS) and ether extract (EE) -more than 98%, chemical oxygen demand (COD) -46-54%, biochemical oxygen demand (BOD5) -39-46%, and free formaldehyde (HCHO) -14-27% due to the use of pre-oxidation and the acid -alkaine double coagulation by applying the ALCAT 105 -SAX 25 system. The use of pre-oxidation with hydrogen peroxide in doses 250.0-450.0 mg/l and then two-stage coagulation resulted in an increase in the reduction of: COD and BOD5 by ca 10-15%, and HCHO by ca 58-66% with reference to the water pretreatment without pre-oxidation. The assessment of sediments formed during the process of pretreatment was made determining the leachable forms of metals (Cu, Ni and Ti) according to methodology of TCLP in compliance with the US EPA Method 1311.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Research on physico-chemical pretreatment of wastewater from the production of wood coating materials

Żak

Rauckyte-Żak

Laurinavičius

et al. 2014

Ecological Chemistry and Engineering S

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“…At the fi rst stage of the study, they applied catalytic oxidation with O 3 /MgO/H 2 O 2 for 120 minutes, which yielded 79% formaldehyde removal and 65.5% organic compounds removal. At the second stage of the experiment, those authors applied biological treatment in an SBR type reactor operating in a 24 h cycle, which eventually led to the complete removal of formaldehyde from wastewaters and to effi cient 98% removal of organic compounds expressed by COD [12].…”

Section: Resultsmentioning

confidence: 99%

“…Wastewaters of this type frequently contain signifi cant quantities of formaldehyde which is applied in technological processes, mainly for the strengthening and preservation of products [7]. Concentrations of contaminants present in wood wastewaters affect directly the fact that they are diffi cult to treat in aerobic and anaerobic biological systems [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Application of Advanced Oxidation Technology on the Effectiveness of Anaerobic Treatment of Wastewaters with a High Concentration of Formaldehyde

Zieliński¹,

Dębowski²,

Dudek³

et al. 2013

Archives of Environmental Protection

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Abstract:The objective of this study was to determine the effect of advanced oxidation process with the use of Fenton's reaction on the effectiveness of anaerobic treatment of wastewaters originating from the wood industry that were characterized by a high concentration of formaldehyde. Experiments were established to analyze changes in COD content and in the concentration of formaldehyde in treated wastewaters, additional analyses were carried out to assay quantitative and qualitative changes in the biogas produced. The fi rst stage of the experiment involved analyses of the effectiveness of the tested wastewaters treatment only in the process of methane fermentation. At the second stage of the experiment, the biological process was preceded by chemical pre-treatment of wastewaters with Fenton's reagent. The conducted study proved that the investigated variants of chemical pre-treatment of wastewaters had a signifi cant effect on increasing the total biogas production. In contrast, no signifi cant effect of the applied technology was demonstrated on changes in the concentration of the analyzed contaminants in the treated wastewaters.

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“…Moussavi et al (Moussavi et al, 2009) showed that the efficiency of the catalytic advanced oxidation process (CAOP) of O 3 /MgO/H 2 O 2 was 79% in FA removal and 65.5% in COD removal for a solution with an initial FA concentration of 7000 mg/dm 3 . Post-treatment in an SBR (Sequencing Batch Reactor) system with a total cycle time of 24 h resulted in complete FA removal and a 98% reduction of COD; the COD concentration in the effluent was below 60 mg/dm 3 .…”

Section: Treatment Of Wastewater From the Production Of Formaldehyde-mentioning

confidence: 99%

Adhesives based on formaldehyde – environmental problems

Wojtkowska¹,

Załęska-Radziwiłł²,

Tabernacka³

2017

bta

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Adhesives are substances that increase the surface adhesion of bonded items. Unfortunately, they also emit volatile organic compounds (VOCs) which negatively impact upon human and animal health. VOCs have carcinogenic and mutagenic properties and can cause migraines, irritation to the eyes, nasal passages, mouth, and lungs, and respiratory problems. Wastewater from adhesive production is characterized by high levels of pollutants and contains high concentrations of compounds including formaldehyde that are toxic to water biocenoses. Moreover, its purification causes many problems and requires the application of specific methods. This review presents data concerning the toxicity and ecotoxicity of selected adhesives components. VOC emission rates from adhesives and wooden construction elements with adhesives are also discussed and assessed. Current knowledge on the treatment methods for wastewater containing adhesive components is reviewed. Finally, the treatment and disposal methods for solid wooden waste containing adhesives are also analyzed and discussed.

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The removal of formaldehyde from concentrated synthetic wastewater using O3/MgO/H2O2 process integrated with the biological treatment

Cited by 96 publications

References 43 publications

Research on physico-chemical pretreatment of wastewater from the production of wood coating materials

Research on physico-chemical pretreatment of wastewater from the production of wood coating materials

Effect of the Application of Advanced Oxidation Technology on the Effectiveness of Anaerobic Treatment of Wastewaters with a High Concentration of Formaldehyde

Adhesives based on formaldehyde – environmental problems

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