Pulp Mill Effluents
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Acute ecotoxicity on Daphnia magna to evaluate effluent samples of Kraft pulp mill treated by UV/H2O2 process
Resumo A indústria de papel e celulose está entre as que mais consome água no mundo, gerando grandes volumes de efluentes. O processo Kraft produz efluentes com elevada DBO, DQO, sólidos suspensos, teor de lignina e uma mistura complexa de compostos potencialmente tóxicos, os quais necessitam de tratamento para posterior descarte no meio ambiente. Os pr
Rev. Ambient. Água. Publicado em: 11/03/2019
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2. THE FUNGAL ABILITY FOR BIOBLEACHING/BIOPULPING/BIOREMEDIATION OF LIGNIN-LIKE COMPOUNDS OF AGRO-INDUSTRIAL RAW MATERIAL
Lignin is present in plant cell secondary wall, associated to carbohydrates preventing their efficient hydrolysis, and cellulose pulp manufacture basically consists in breaking down the middle lamella of plant cells, individualizing fibers such as cellulose from the other biopolymers. Different levels of lignocellulose are found in plant residues and they ca
Quím. Nova. Publicado em: 2017-09
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3. Soil Quality after Six Years of Paper Mill Industrial Wastewater Application
ABSTRACT The application of wastewater to irrigate soils may be an attractive option for paper mills, especially when the effluents can also provide nutrients to plants. Since there could be negative environmental effects, such activity must be preceded by a thorough evaluation of the consequences. The changes in soil quality of a Neossolo Flúvico Distrófi
Rev. Bras. Ciênc. Solo. Publicado em: 06/02/2017
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4. Mecanismos de remoção de compostos orgânicos no sistema de lodos ativados de uma fábrica de polpa Kraft branqueada de eucalipto / Removal mechanisms of organic compounds in a eucalyptus bleached kraft pulp mill activated sludge plant
The composition and adsorptive capacity of extracellular polymeric substances (EPS) in a eucalyptus bleached kraft pulp mill activated sludge plant were investigated. Samples of primary and secondary effluents and activated sludge were collected over five months. Effluents were characterized by quantifying dissolved organic carbon (DOC), chemical (COD) and b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2011
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5. Treatment of pulp and paper bleaching effluents by means of ozone advanced oxidation processes / Tratamento de efluentes do branqueamento da polpa celulósica por processos oxidativos avançados baseados em ozônio
The impact of ozone oxidation in transforming high molecular weight (HMW) organic compounds in order to improve the biodegradability of pulp and paper effluents was investigated under different ozone doses. The experiments were conducted uppon a primary treated effluent and an alkaline bleach plant effluent taken from two pulp mills. The effluents were inves
Publicado em: 2008
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6. Avaliação ecotoxicológica de efluentes de celulose branqueada de eucalipto ao longo do tratamento biológico / Ecotoxicology assessment of bleached eucalipt pulp mill efluents in the biological treatment
O presente estudo teve como objetivo avaliar a toxicidade de efluentes de celulose branqueada de eucalipto. Inicialmente foi feita uma caracterização físicoquímica das amostras, em diferentes pontos ao longo do tratamento, e posteriormente para estes mesmos pontos foi avaliada a toxicidade com quatro organismos-teste: para toxicidade aguda: a) Vibrio fis
Publicado em: 2008
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7. Combinação de tratamento biológico aeróbio com processos oxidativos avançados visando intensificar a remoção de matéria orgânica em efluentes da indústria têxtil e de celulose kraft / Combining aerobic biological treatment and advanced oxidation processes to increase organic matter removal in textile and kraft pulp mill effluents
Bleached kraft pulp and textile effluents contain hard to degrade and, or toxic substances, and these industries often cannot meet legal limits for effluent chemical oxygen demand using conventional effluent treatment. Use of advanced oxidation processes (AOPs) is therefore being studied to treat their effluents. AOPs use a strong oxidizing agent to degrade
Publicado em: 2007
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8. Tratamento anaeróbio de efluentes de máquina de papel por biorreator convencional e biorreator de membranas / Anaerobic treatment of paper machine effluents by conventional bioreactor and membrane bioreactor
Fresh water use in paper mills varies according to the type of paper produced, but it can be as high as 100 m3 per ton of paper. In order to reduce water use in paper mills, the reclamation of whitewater is an attractive option. However, it is not always possible to completely recover the whitewater in a closed-cycle manner due to the poor quality of this st
Publicado em: 2007
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9. Uso de ozônio como pré e pós-tratamento de efluentes da indústria de celulose kraft branqueada / Pre and post ozone treatment of bleached kraft pulp mill effluents
This work evaluated the combination of ozone and activated sludge for treatment of bleached kraft pulp effluents. Ozonation was done before and after biological treatment. First the influence of pH, temperature and hydrogen peroxide dose on ozonation was assessed in order to optimize treatment efficiency, which was evaluated in terms of COD, BOD5, lignin, bi
Publicado em: 2006
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10. Anaerobic process conjugated with advanced oxidation processes (AOP) for the treatment of the bleaching effluents from a kraft pulp mill / Processo anaeróbio conjugado com processos oxidativos avançados (POA) no tratamento dos efluentes do processo industrial de branqueamento da polpa celulósica
Alguns dos chamados processos oxidativos avançados (POA) foram aplicados após um processo biológico anaeróbio no tratamento de efluentes do processo industrial de branqueamento da polpa celulósica, visando a aumentar a biodegradabilidade desses efluentes e remover compostos tóxicos, de modo a permitir que um posterior tratamento biológico possa ser ma
Publicado em: 2006
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11. Biological degradation of resin acids in wood chips by wood-inhabiting fungi.
Resin acids in many pulp mill effluents are primary sources of toxicity to fish. Inconsistent biological detoxification of chlorinated and nonchlorinated resin acids in secondary treatment of pulp mill effluents is a continuing source of concern. An alternative approach to effluent detoxification is to remove or modify the toxic compounds present in wood chi
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12. Coliform Bacteria and Nitrogen Fixation in Pulp and Paper Mill Effluent Treatment Systems
The majority of pulp and paper mills now biotreat their combined effluents using activated sludge. On the assumption that their wood-based effluents have negligible fixed N, and that activated-sludge microorganisms will not fix significant N, these mills routinely spend large amounts adding ammonia or urea to their aeration tanks (bioreactors) to permit norm
American Society for Microbiology.