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Academic literature on the topic 'Biltvätt'
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Dissertations / Theses on the topic "Biltvätt"
Nahid, Mustafa Hammodi. "Oljeavskiljare för biltvätt : Från idé till prototyp." Thesis, Uppsala universitet, Industriell teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256574.
Full textSuokko, Joel. "Vattenrening vid biltvätt : Exemplet Arla Foods i Kallhäll." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230777.
Full textThis thesis investigates some of the wastewater treatment methods that exist at car washes in Sweden. The main treatment methods that have been described are chemical, biological, electrochemical, hydrocyclone, ion exchange, filter and membrane treatment. The report aimed to find a cheap and environmentally friendly treatment option that requires little maintenance and could be used, at the truck wash at Arla Foods´ dairy in Kallhäll, to enable recirculation of water. A column experiment was also carried out in which the filter materials natural sand, Petrit E and ZinkStop were tested to determine their suitability to be used at vehicle washes. The experiment showed that Petrit E was the only material which managed to reduce the heavy metal concentrations below the current legal limits. However, the material was not believed to last as long as ZinkStop, which makes it less suitable than ZinkStop from an environmental and economic standpoint. ZinkStop also showed a good removal of most metals but did result in a high initial chromium emission. The sand had lower removal rates of most metals. To achieve low operational costs at Arla Foods’ dairy and to lower the consumption of chemicals a biological treatment system is recommended.
Thorbjörnsson, Ludvig. "Utnyttjande av spillvärme och minskade behov av köpt el i biltvättar : En undersökning av Berners miljötvättar i Östersund och Sundsvall." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84827.
Full textBerners is a major player in the sale and service of cars and transport vehicles in Jämtland and Västernorrland. At its facilities in Sundsvall and Östersund, Berners provides, among other things, car washes and auto reconditioning and these operations give rise to large discharges of water and chemicals. To reduce emissions, Berners has installed evaporator treatment, which is a treatment technique based on the evaporation of dirty washing water and the fallout of dangerous particles. With this technology, almost all chemical emissions are eliminated and approximately 90 percent of the washing water is reused. Evaporator cleaning requires a lot of energy in the form of electricity that is currently purchased. The treatment technology also gives rise to waste heat in both air and water, which is currently not used. The purpose of the work is to investigate potential improvement measures for Berner's car washes, to make the existing and possible future facilities better. This is done by investigating the possibilities of utilizing waste heat and reducing the need for purchased electricity, through own production of electricity with solar cells. The goal is to thereby produce a basis for Berners when they are to decide on any changes to the existing washes and when building new facilities. The basis shall consist of results for reduced energy needs, reduced emissions, reduced need for purchased electricity and lifetime savings for the improvement measures. The work examined three different improvement measures. Installation of FTX- ventilation to heat the incoming air to an adjacent room with outgoing air from the room where the evaporator is located, installation of a plate heat exchanger to heat the liquid in a radiator circuit with outgoing distillate from the evaporator and installation of solar cells to reduce the need for bought electricity for the evaporator. Monocrystalline, polycrystalline and thin film solar cells as well as different sizes of installed area were investigated. Reduced energy needs were calculated for FTX and VVX, reduced needs for purchased electricity were calculated for solar cells and reduced emissions of carbon dioxide equivalents as well as lifetime savings were calculated for all three improvement measures. The results show that a combination of installing FTX, VVX and polycrystalline solar cells generates the largest lifetime savings, as well as the largest emission reductions. Installing a plate heat exchanger to take advantage of waste heat in distillates is the single best measure to reduce energy needs. When installing one or more of the various improvement measures, Berners can reduce the energy needs and emissions from the car washes and reduce the need for purchased electricity, while at the same time saving money.
Söderlundh, Sussie. "Rening av avloppsvatten från biltvättar med filter av torv och inblandad kolaska : en utvärdering av effektivitet och avfallshantering ur ett miljöperspektiv." Thesis, Kristianstad University College, Kristianstad University College, Department of Mathematics and Science, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-6617.
Full textFiltermaterial av 75 % torv och 25 % kolaska har använts under 2 respektive 4 år för rening av avloppsvatten från två biltvättar. Jämförelse med Kristianstads kommuns riktvärden för avloppsvatten från fordonstvättar visar att filtren fungerat. För avfallsklassning krävs kunskap om innehåll av miljöfarliga ämnen i produkter som använts i tvätthallarna. I brist på kunskap om innehåll av ej analyserade miljöfarliga ämnen i filtren anses förbränning vara ett bra omhändertagande ur miljösynpunkt, då energi och aska återvinns.
Sewage water from two car washes has been treated during 2 and 4 years respectively, using a filter made of 75 % peat and 25 % carbon-containing ash. A comparison with the guiding values for car wash sewage water in Kristianstad municipality shows that this type of filter works well. Classification of the filter as waste requires knowledge about the content of environmentally harmful substances in products used in the car washes. Because of the lack of knowledge about the content of non-analyzed substances in the filters, combustion must be regarded as an environmentally good way of disposing the filter material, as both energy and ashes are recycled.
Ekström, Sanna. "Zinkutsläpp från biltvättar." Thesis, KTH, Industriell ekologi, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32675.
Full textThis master’s thesis treats the subject zinc emissions from car washes and includes an account on the complex of problems that zinc in the environment brings and a preparation of apractically and economically viable method to reduce the content of zinc in the sewage waterfrom the biological sewage water treatment works Alaska Bio through investigations and experiments of different methods. Literary studies has been conducted in order to find out how the zinc moves and interacts withit’s environment to be able to draw a conclusion on how important it is to prioritise takning measures for the problem. Literary prestudies has also been made to find out how an adjustment in the pH-value can affect the percentage of dissolved zinc and whether the complexing agent that exists in the water can influence the extraction of zinc. Evaluations has also been made of different purification methods that can be suitable to complement thebiologal sewage water treatment works and it includes sand filter, peat filter, ion exchanger,membrane filter and vaporiser. The thesis also maps and describes the operation of carwashes and the water treatment works in Sweden. It includes the different techniques that are being used, how they affect the environment and how they may look in the future. More thorough descriptions has been madeof the biological sewage water treatment works Alaska Bio and it’s use of chemical compounds. Experiments have been performed in order to find out how the extraction of zinc is affectedwhen the pH-value in the sewage water is altered and the conclusion that the amount of ioniczinc, that is dissolved, is minimal in the pH range 8,6-9,2 and maximal at low pH-valuescould be drawn. Most of the zinc were dissolved at pH 6 already. The percentage of zinc wasreduced by up to 60 % when the pH was adjusted from normal pH to optimal pH. The analysis also showed that the percentage of dissolved zinc was 68-90 % in the water at normalpH-values. This means that a part of the zinc is already in particle form and should be able to sediment. Experiments were also made on sewage water after the use of cleaning chemicals that doesn’tcontain the complexing agent NTA, which were suspected to affect the amount of zinc inparticle form, and they didn’t indicate that it had any larger affect on the amout of particular zinc. Experiments in a smaller scale were conducted with the two polishing methods that appeared to have a promising potential to extact zinc from the sewage water, which were peat filter and sand filter. The percentage of zinc in the water after sand filtration was lowered by 51 % forwater with unadjusted pH-value and 68 % for water with pH-value adjusted to it’s optimalvalue. The results after analysis of the water from the peat filter showed that the percentage of zinc was lowered with about 85 % for all water samples that were pumped through the filter. Relevant advantages and disadvantages were weighed between the different alternatives ofpolishing methods such as costs, operating and other practical aspects and the conclusion wasdrawn that the sand filter is the best alternative. Finally the sandfilter technique was followedup more by studies and experiments with the buffer chemicals based on phosphates andcarbonates and a complete concept that can be tested in full scale were created.
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