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Ecotoxicity of Firefighting foam
Belisová, Mária ; Vávrová, Milada (referee) ; Zlámalová Gargošová, Helena (advisor)
This bachelor thesis deals with ecotoxicity of selected fire extinguishing agents concentrated on surface-active agents (surfactants) contained in foam fire extinguishers. Tested substances were solid humectants TS TURBO and TS ECO. In this bachelor thesis the ecotoxicological effects were assessed through aquatic ecotoxicity tests with an aquatic plant Lemna minor and a crustacean Thamnocephalus platyurus. They are fresh-water organisms on which the water contamination can be quickly and quite easily assessed. Also these fire extinguishers were tested for acute ecotoxicity of soil organisms by ecotoxicological contact tests with Eisenia fetida and seeds of Lactuca sativa. Finally, the biodegradation of both fire extinguishing agents was tested, observing the change between 24 hour exposition and one month exposition of tested agents. The change of toxicity was tested with Thamnocephalus platyurus. Based on experimental results of extinguishing agents the value of LC50 and IC50 was calculated and the ecotoxicity was compared.
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Ecotoxicity of Firefighting foam
Belisová, Mária ; Vávrová, Milada (referee) ; Zlámalová Gargošová, Helena (advisor)
This bachelor thesis deals with ecotoxicity of selected fire extinguishing agents concentrated on surface-active agents (surfactants) contained in foam fire extinguishers. Tested substances were solid humectants TS TURBO and TS ECO. In this bachelor thesis the ecotoxicological effects were assessed through aquatic ecotoxicity tests with an aquatic plant Lemna minor and a crustacean Thamnocephalus platyurus. They are fresh-water organisms on which the water contamination can be quickly and quite easily assessed. Also these fire extinguishers were tested for acute ecotoxicity of soil organisms by ecotoxicological contact tests with Eisenia fetida and seeds of Lactuca sativa. Finally, the biodegradation of both fire extinguishing agents was tested, observing the change between 24 hour exposition and one month exposition of tested agents. The change of toxicity was tested with Thamnocephalus platyurus. Based on experimental results of extinguishing agents the value of LC50 and IC50 was calculated and the ecotoxicity was compared.
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Possibilities for the use of fire extinguishing equipment for extinguishing fires
HRNČÍŘ, Miroslav
In my bachelor thesis about the Possibility of usage fixed fire extinguishing systems for extinguishing fires I was mainly interested in the topic of fixed fire extinguishing systems and their usage and also in the problematics of fixed fire extinguishing systems installed and used in the SYNTHOS Kralupy a. s., SYNTHOS PBR s. r. o. and TAMERO INVEST s. r. o. (companies) For this purpose, four fixed fire extinguishing systems were chosen based on the used fire extinguishing agent. According to these criteria were chosen water, foam, powder and gas based fixed fire extinguishing systems, which are described in the thesis with regard to their construction, operation and usage. Chosen fixed fire extinguishing systems were further evaluated regarding their capabilities for extinguishing fire. According to the conducted research current options for fixed fire extinguishing systems are used. Even though current options of usage fixed fire extinguishing systems are used it is possible to improve the usage of them by introducing technical and organizational measures. As a crucial technical measure, there is proposed a technical adjustment of the water based fixed fire extinguishing system. For improving the usage of this fixed fire extinguishing system and increasing the level of fire safety of the guarded object it is proposed to change this non-automatic fixed fire extinguishing system to automatic. Other devices are automatic and the proposed improvements do not have such underlying character as it in case of the evaluated water based fixed fire extinguishing system. In the theoretical part of the thesis there are described terms like fire, burning and conflagration (fire). There are named conditions and possibilities for the origin of fire and its spreading and is described the spreading of conflagration in time and space. Furthermore, the theoretical part of the thesis is concerned about named fixed fire extinguishing systems. There is the history of their use for fighting fire, the overview of fixed fire extinguishing systems based on the used agent and the description on the different kinds of fixed fire extinguishing systems along with the description of the possibilities of their use for fighting fire. In the theoretical part are also mentioned new technologies used in the field of fixed fire extinguishing systems. The conclusion of the thesis is focused on the problematics of operation and operational capability of fixed fire extinguishing systems.
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