Biotreatability test of bleach wastewaters from pulp and paper mills

Wang, X.; Mize, T. H.; Saunders, F. M.; Baker, S. A.

doi:10.2166/wst.1997.0492

Cited by 4 publications

(3 citation statements)

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“…[5,6] All experiments were conducted at 20 C and pH 7. The exhaust gas was collected at the top and bubbled through a 1 mol dm À3 iodine solution trap at pH 12, and then through a 2 dm 3 (5 cm O.D.)…”

Section: Methodsmentioning

confidence: 99%

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Combined Physical-Chemical and Biological Treatment of Poorly Biodegradable Industrial Effluents

González¹,

Zaror²,

Carrasco³

et al. 2003

Journal of Environmental Science and Health, Part A

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Effluents from small and medium sized chemical plants may contain significant amounts of poorly biodegradable aromatic compounds, which could negatively affect water quality and public health. This is a key environmental issue, particularly in areas where effluents are discharged into drinking water sources. Unfortunately, conventional biological treatment may not be able to meet discharge standards, and combined systems should be implemented. In this context, this paper presents experimental results on the application of a combined sequential ozonation-activated carbon-biological system to treat effluents containing chlorinated aromatic contaminants from chlorine based pulp bleaching. The experimental system consisted of an ozone bubble column reactor (0.3 dm3), an activated carbon fixed bed reactor (0.2 dm3), and an aerobic bioreactor (20 dm3). Ozone was produced from pure O2 using a generator rated at 2 mmol O3 h(-1). The bleaching effluent was pretreated and fed into the aerated sequencing batch bioreactor containing preconditioned biological sludge (3-4 g VSS dm(-3)), and cultured for 24 h. Samples of raw and treated effluents were assayed for biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total organic carbon (TOC), total phenols, and adsorbable organic halogens (AOX), using standard techniques. The presence of potential genotoxic activity in untreated and treated samples was assessed using the Ames tests. Results show that biological treatment of raw samples could not remove mutagenic activity on its own. On the other hand, ozonation followed by activated carbon treatment and biological treatment successfully removed genotoxicity in all cases. Reductions in BOD, COD, TOC, AOX, and phenols by biological treatment increased when samples were pretreated with ozone/activated carbon.

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Section: Methodsmentioning

confidence: 99%

“…2, and a clear dose-response trend over three or more doses. [5,11] A marginal increase in removal efficiency was obtained when activated carbon pretreatment was introduced. Table 1 summarizes the chemical compositions of assayed samples.…”

Section: Mr ¼mentioning

confidence: 99%

Combined Physical-Chemical and Biological Treatment of Poorly Biodegradable Industrial Effluents

González¹,

Zaror²,

Carrasco³

et al. 2003

Journal of Environmental Science and Health, Part A

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“…Já foram realizados diversos estudos, aplicando a tecnologia anaeróbia, na tentativa de uma avaliação do comportamento dos efluentes do processo de branqueamento da polpa celulósica. Wang et al (1997)…”

Section: Os Processos Biológicos Aplicados No Tratamento Dos Efluentes Do Processo De Branqueamento Da Polpa Celulósicaunclassified

Processo anaeróbio conjugado com processos oxidativos avançados (POA) no tratamento dos efluentes do processo industrial de branqueamento da polpa celulósica

Momenti¹

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Microbial Cultures Producing Hydrolytic Enzymes to Be Further Used in Processing of Agricultural and Food Industry Wastes

Maksimov

Maksimova²,

Шилова

et al. 2021

Mikrobnye biotehnologii: fundamentalʹnye i prikladnye aspekty

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The results of isolation and research of microorganisms – producers of hydrolytic enzymes, biodestructors of cellulose-containing materials, identification of limiting factors for optimizing the processes of biodestruction, ways and prospects of their use for biotechnological processing of biogenic raw materials are presented. A new strategy for the fermentation of cellulose-containing waste in dumps and storage facilities of biogenic waste is proposed. One of the key points of the new technology is the creation of a volumetric zone of active biodegradation using a new type of open-type reactor that creates an optimal environment for the growth of biodegradators. The results of such processing are organic fertilizers, humates, feed protein and other useful products.

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Biotreatability test of bleach wastewaters from pulp and paper mills

Cited by 4 publications

References 0 publications

Combined Physical-Chemical and Biological Treatment of Poorly Biodegradable Industrial Effluents

Combined Physical-Chemical and Biological Treatment of Poorly Biodegradable Industrial Effluents

Processo anaeróbio conjugado com processos oxidativos avançados (POA) no tratamento dos efluentes do processo industrial de branqueamento da polpa celulósica

Microbial Cultures Producing Hydrolytic Enzymes to Be Further Used in Processing of Agricultural and Food Industry Wastes

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