Algen, Flechten, Moose und Farne auf Fassaden

Hofbauer, Wolfgang; Breuer, Klaus; Sedlbauer, Klaus

doi:10.1002/bapi.200301660

Cited by 13 publications

(11 citation statements)

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“…A valuable tool for ecophysilogic investigations are defined cultures. The collection of building relevant microorganisms, BRMO, established in the course of work on primary colonization of building surfaces, is providing a source of knowledge and documentation for building relevant algae and fungi [ 1 , 2 , 3 , 31 ].…”

Section: Algae Toxic To the Built Environment Or To Work Of Menmentioning

confidence: 99%

“…In recent studies on the initial growth on modern façades, an unexpected diversity was found with more than 70 species. On surfaces of insulated façades, eukaryotic algae, especially green algae prevail, mainly Trebouxiophyceae, supplemented by other algal taxa [ 1 , 2 , 3 ]. Substrates and habitats may be all exposed materials, masonry, concrete, metal posts and signs, varnished surfaces, plastic, glass, ceramics, wood, monuments and other works of art, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Many of them comprise difficult taxa that are not easy to distinguish—therefore, the value of cultures as a major tool for taxonomic analyses cannot be overstressed [ 3 , 29 , 30 ]. Recently, a culture collection focusing on the built environment, BRMO—building relevant micro-organisms—has been established at the Fraunhofer Institute for Building Physics (IBP), mainly based on proprietary investigations, with emphasis on aerophytic algae and fungi [ 1 , 2 , 3 , 31 ]. Increasingly, molecular methods are adopted and applied as essential tools in assessing the microbial communities of the built and urban environments [ 32 , 33 , 34 ], lately also metagenomics approaches [ 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

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Toxic or Otherwise Harmful Algae and the Built Environment

Hofbauer

2021

Toxins

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This article gives a comprehensive overview on potentially harmful algae occurring in the built environment. Man-made structures provide diverse habitats where algae can grow, mainly aerophytic in nature. Literature reveals that algae that is potentially harmful to humans do occur in the anthropogenic environment in the air, on surfaces or in water bodies. Algae may negatively affect humans in different ways: they may be toxic, allergenic and pathogenic to humans or attack human structures. Toxin-producing alga are represented in the built environment mainly by blue green algae (Cyanoprokaryota). In special occasions, other toxic algae may also be involved. Green algae (Chlorophyta) found airborne or growing on manmade surfaces may be allergenic whereas Cyanoprokaryota and other forms may not only be toxic but also allergenic. Pathogenicity is found only in a special group of algae, especially in the genus Prototheca. In addition, rare cases with infections due to algae with green chloroplasts are reported. Algal action may be involved in the biodeterioration of buildings and works of art, which is still discussed controversially. Whereas in many cases the disfigurement of surfaces and even the corrosion of materials is encountered, in other cases a protective effect on the materials is reported. A comprehensive list of 79 taxa of potentially harmful, airborne algae supplemented with their counterparts occurring in the built environment, is given. Due to global climate change, it is not unlikely that the built environment will suffer from more and higher amounts of harmful algal species in the future. Therefore, intensified research in composition, ecophysiology and development of algal growth in the built environment is indicated.

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Section: Algae Toxic To the Built Environment Or To Work Of Menmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toxic or Otherwise Harmful Algae and the Built Environment

Hofbauer

2021

Toxins

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“…Výskumy v oblasti kolonizácie ETICS mikroorganizmami sú okrem zisťovania príčin orientované aj na hodnotenie významnosti kolonizácie. V tejto súvislosti, bol okrem taxonomického zaradenia identifikovaných druhov mikroorganizmov na fasáde, vytvorený návod pre vizuálne určenie kvantitatívneho zastúpenia mikroorganizmov na ETICS a určenie významnosti kolonizácie [2]. Vývoj kolonizácie mikroorganizmov pozorovali nemeckí vedci v období 5 rokov.…”

Section: Hodnotenie Technického Stavu Etics S Biokoróziouunclassified

The Methodology for the Selection of Technology for Eliminating Microorganisms on the Etics

Antošová

2015

CzeJCivEng

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This article is about treatment of facades with composite external thermal insulation system. The aim of this article is to show the importance of conceptual and strategic reasoning while a proposal for such treatment is drawn. The text presents information acquired by a long-term research (contamination of ETICS by biological material, mostly algae), According to the text, the information is vastly influential to the conclusion.

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“…The expected life of ETICS is 25-30 years (ETAG 2004) so this treatment should be repeated [2]. Studies in the field of ETICS colonization by microorganisms have been oriented to assess the significance of colonization [3][4]. The chemicals used for microorganisms´ elimination on the facades, either as bounded, encapsulated in pigments and plaster or loose, un-encapsulated agents, reducing their development and growth, containing mainly toxic heavy metal compounds, are based on the basis of active silver.…”

Section: Introductionmentioning

confidence: 99%

Environmentally safe system for treatment of bio corrosion of ETICS

Minarovičová

Dlhý

2018

MATEC Web Conf.

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Abstract. Effects of microorganisms on building facades are responsible for aesthetic, bio-geophysical and biogeochemical deterioration. The process of cleaning of contaminated facades involves the removal and eradication of micro flora on the surface of insulation using chemical products, killing cells and eliminating all living mass, including organic ingredients. The removal of bio corrosion coating from ETICS structure by means of chemical and preservative substances (biocides) is currently the only effective and most used technology. Uncontrolled leaching of the used biocides is unacceptable. Meantime, new technology for environmentally safe maintenance of ETICS is needed. Scientists have been working on replacement the biocides currently used in facades treatment with eco-friendly biocides that have no negative effects on the environment or human beings. While the eco-treatment will be available, safe dewatering of chemicals being leached from the surface of the facade could be provided by e.g. special drain systems adjusted to the building type, use and age. The paper gives an overview of the problem in context of Slovakia and examples of leaching systems designed for new and renovated buildings.

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Algen, Flechten, Moose und Farne auf Fassaden

Cited by 13 publications

References 0 publications

Toxic or Otherwise Harmful Algae and the Built Environment

Toxic or Otherwise Harmful Algae and the Built Environment

The Methodology for the Selection of Technology for Eliminating Microorganisms on the Etics

Environmentally safe system for treatment of bio corrosion of ETICS

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