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Comparison of two biocides--carbamate and glutaraldehyde--in the control of fouling in pulp and paper industry
- Source :
- Scopus-Elsevier, CIÊNCIAVITAE, Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Publication Year :
- 2001
-
Abstract
- Formation of fouling deposits is a serious problem facing paper mills. Despite the search for alternative methods, chemical biocides still represent the chief countermeasure to control microbial growth and general fouling buid-up in pulp and paper mills. The purpose of this work was to determine the effect of two biocides (carbamate and glutaraldehyde) on both planktonic cells and fouling layers of a paper machine system. A flow system was used for the study of fouling accumulation in an industrial white water circuit. Both biocides proved to be more effective in reducing the microbial loading of the white water circuit than the deposit accumulated on the stainless steel surfaces. Carbamate, in contrast to glutaraldehyde, had the ability of promoting cell agglomeration since the microbial loading decreased much more when the white water, treated with carbamate, was filtered through a filter-linen. The retention of suspended cells in the cellulose fibres acquires major importance since it is obtained by using an already existing physical process (filtration), which strongly enhances the overall microbial reduction obtained with the addition of the carbamate, without increasing the economic costs. These results also suggest that the use of conventional retention agents in pulp and paper processes can be efficient in controlling unwanted microbial effects.<br />Junta Nacional de Investigação Científica e Tecnológica (JNICT) - PRAXIS XXI, 2/2.1/BIO/37/94, BD/3242/94. Instituto de Biotecnologia e Química Fina (IBQF).
- Subjects :
- Paper
Biocide
Carbamate
Insecticides
medicine.medical_treatment
010501 environmental sciences
engineering.material
Bacterial growth
Ciências Tecnológicas
01 natural sciences
Waste Disposal, Fluid
03 medical and health sciences
chemistry.chemical_compound
medicine
Water Movements
Technological sciences
Environmental Chemistry
Industry
Cellulose
White water
Waste Management and Disposal
0105 earth and related environmental sciences
Water Science and Technology
0303 health sciences
Science & Technology
Fouling
030306 microbiology
Chemistry
Pulp (paper)
Paper mills
Environmental engineering
General Medicine
Pulp and paper industry
6. Clean water
3. Good health
Glutaral
Flow cell
Biocides
engineering
Glutaraldehyde
Carbamates
Water Microbiology
Filtration
Waste disposal
Disinfectants
Subjects
Details
- ISSN :
- 09593330
- Volume :
- 22
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Environmental technology
- Accession number :
- edsair.doi.dedup.....b69930543fb71db1522331013d44bbd7