Degradation of formaldehyde in anaerobic sequencing batch biofilm reactor (ASBBR)

Pereira, N.; Zaiat, Marcelo

doi:10.1016/j.jhazmat.2008.07.028

Cited by 39 publications

(15 citation statements)

References 20 publications

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“…In agreement with this work Pereira and Zaiat [29] observed COD removal was around 70% when the formaldehyde concentrations ranging 110 to 1104 mg L-1 . And in according with Aranã and co-workers [30] treating formaldehyde waste not is a simple task due to the diversity of organic and inorganic compounds that they may contain and due to high demand for H 2 O 2 .…”

Section: Influence Of Concentration Of Samplesupporting

confidence: 90%

Photo-Fenton process for treating biological laboratory wastewater containing formaldehyde

2010

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25resumo: Um método de correção de interferência espectral e de transporte é proposto, e foi aplicado para minimizar interferências por moléculas de PO produzidas em chama ar-acetileno e de transporte causada pela variação da concentração de ácido fosfórico. . Fixando-se a taxa de aspiração da amostra em 5,0 ml min -1 , e integrando-se a absorbância no comprimento de onda a 3 pixels, curvas analíticas para Pb (0,1 -1,0 mg L -1 ) foram obtidas com coeficientes de correlação típicos ≥ 0,9990. As correlações lineares entre absorbância e concentração de P nos comprimentos de onda 217,0005 e 217,0458 foram ≥ 0,998. O limite de detecção de Pb foi 10 µg L -1 . O método de correção proposto forneceu desvios padrão relativos (n=12) de 2,0 a 6,0%, ligeiramente menores que os obtidos sem correção (1,4-4,3%). As recuperações de Pb adicionado às amostras de ácido fosfórico variaram de 97,5 a 100% (com correção pelo método proposto) e de 105 a 230% (sem correção).Palavras-chave: método de correção por equação matemática; espectrometria de absorção atômica com fonte contínua e de alta resolução; chumbo; ácido fosfórico. Abstract: Laboratories consume great amounts of hazardous chemicals substances and consequently generate wastewater containing them, for example formaldehyde. This substance is widely utilized to preserve biological samples generating many liters of this residue every year. The present work proposes the use of the photo-Fenton process to treat formaldehyde wastewater using sunlight irradiation. Some aspects were investigated such as the iron source, sample and hydrogen peroxide concentration and also the use of stirred systems. The use of ferrioxalate (0.5 mmol L-1) improved the efficiency of the process in relation to the use of iron nitrate, while at least 1.0 mol L-1 H2O2 is necessary to treat the sample of the 500 mg C L-1. Under these conditions, every formaldehyde detectable was degradeted and 89% of the dissolved organic carbon was removed in two hours of exposure to sunlight. These results are satisfaction considerate for São Paulo State Environmental Agency. Artigo/Article PHoto-Fenton ProCeSS For treAting

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Section: Influence Of Concentration Of Samplesupporting

confidence: 90%

Photo-Fenton process for treating biological laboratory wastewater containing formaldehyde

2010

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“…Biological processes are widely preferred due to their capability of eliminating a wide range of contaminants, flexibility and reliability, simplicity of operation and maintenance, cost-effectiveness, environmental benignity, degradation of contaminants to less toxic or harmful products rather than transferring them into another phase, potential for full-scale applications, etc. Several reports have been published on the biological removal of phenol (e.g., Busca et al, 2008;Moussavi et al, 2009a) and formaldehyde (e.g., Pedersen et al, 2007;Pereira and Zaiat, 2009), suggesting the bioprocess as a viable method for treating effluents containing such compounds. Nonetheless, literature on the biodegradation of the mixture of phenol and formaldehyde from wastewater is limited (Eiroa et al, 2005;Kochany and Lipczynska-Kochany, 2009), However, as noted above, when dealing with wastewater generated in PF resin synthesis plants, the simultaneous elimination phenol and formaldehyde, each at concentration up to several hundred mg L −1 , is required.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of mixture of phenol and formaldehyde in wastewater using a single-basin MSCR process

Moussavi

Heidarizad

2010

Journal of Biotechnology

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“…These results are in agreement with a previous report (Garrido and Méndez, 2000), where a significant portion of the initial COD remains in the effluent. Pereira and Zaiat (2009) also reported that despite satisfactory formaldehyde reductions achieved in a bench scale anaerobic sequencing batch reactor, COD removal was not satisfactory, due to either the presence of persistent intermediate compounds or microbiological inhibition. In addition, those authors mentioned that the presence of organic acids such as acetic and propionic might be associated with the remained COD in the effluent.…”

Section: Cod and Formaldehyde Related Discussion -Phase I (Cycles 1-20)mentioning

confidence: 99%

Biotreatability of wastewater generated during machinery washing in a wood-based industry: COD, formaldehyde and nitrogen removal

Kaczala

Marques

Hogland

2010

Bioresource Technology

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Degradation of formaldehyde in anaerobic sequencing batch biofilm reactor (ASBBR)

Cited by 39 publications

References 20 publications

Photo-Fenton process for treating biological laboratory wastewater containing formaldehyde

Photo-Fenton process for treating biological laboratory wastewater containing formaldehyde

Biodegradation of mixture of phenol and formaldehyde in wastewater using a single-basin MSCR process

Biotreatability of wastewater generated during machinery washing in a wood-based industry: COD, formaldehyde and nitrogen removal

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