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report:soa [2026/03/28 07:52] – [Background and Related Work] team3report:soa [2026/04/21 14:14] (current) – [Comparative Analysis] team3
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 This chapter provides the necessary concepts and background information to address these challenges technologically. We focus on this target group: young, health-conscious and tech-savvy individuals who view a user-friendly app as an enrichment of their daily lives and who prioritize not only clean water and bottles but also a sufficient supply of minerals and consistent hydration. Especially travelers who are often unsure about the local water quality abroad can benefit from a smart bottle.  This chapter provides the necessary concepts and background information to address these challenges technologically. We focus on this target group: young, health-conscious and tech-savvy individuals who view a user-friendly app as an enrichment of their daily lives and who prioritize not only clean water and bottles but also a sufficient supply of minerals and consistent hydration. Especially travelers who are often unsure about the local water quality abroad can benefit from a smart bottle. 
  
-Before presenting our own solution, we will first analyze concepts and existing products on the market. Finally, a detailed comparative table will be provided, evaluating current market leaders alongside the specific sensors and features relevant to our project. +Before presenting our own solution, we will first analyze concepts, existing products and projects on the market. Finally, a detailed comparative table will be provided, evaluating current market leaders alongside the specific sensors and features relevant to our project.  
  
-<color #ed1c24>Add and cite references properly. References are added in BibTeX format to the refnotes.bib file and then are cited through the text as needed . See how to do it by following the links at the bottom of the page.</color> 
 ==== Concepts ==== ==== Concepts ====
 ==The IoT and Digital Health Framework == ==The IoT and Digital Health Framework ==
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 == Hygiene, Biofilms, and Contamination Risks  == == Hygiene, Biofilms, and Contamination Risks  ==
  
-While reusable bottles are generally more sustainable and economical, they also require regular cleaning. Observations of user behavior suggest that many consumers frequently refill their bottles without cleaning them sufficiently. A major theoretical challenge is the hygiene gap, because these bottles often harbor heterotrophic plate counts (HPC), which include bacteria, yeast, and mold [(Sun2017)]. In the EU, the safety limit of 100 CFU/mL is frequently exceeded because users often refill bottles without sufficient cleaning [(Bartram2002)]. Microorganisms form biofilms on internal surfaces, especially when nutrients are present and disinfectants are absent, potentially leading to foodborne illnesses in vulnerable groups [(WHO2002)]. +While reusable bottles are generally more sustainable and economical, they also require regular cleaning. Observations of user behavior suggest that many consumers frequently refill their bottles without cleaning them sufficiently. A major theoretical challenge is the hygiene gap, because these bottles often harbor heterotrophic plate counts (HPC), which include bacteria, yeast, and mold [(Sun2017)]. The Colony Forming Units per milliliter (CFU/ml) is a measure for the number of living, reproducible bacteria or fungi in a liquid sample [(Sun2017)]. In the EU, the safety limit of 100 CFU/mL is frequently exceeded because users often refill bottles without sufficient cleaning [(Bartram2002)]. Microorganisms form biofilms on internal surfaces, especially when nutrients are present and disinfectants are absent, potentially leading to foodborne illnesses in vulnerable groups [(WHO2002)]. 
  
 == Mineralization and Nutritional Value === == Mineralization and Nutritional Value ===
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 == The UV-C Sterilization Project ==  == The UV-C Sterilization Project == 
  
-The study [(Sun2017)] found that more than 20 % of reusable bottles had bacterial counts that exceeded the limit. Organic substances are referred to as heterotrophic plate count (HPC) and include mold, bacteria, and yeast.  Different countries have different limit values for HPC in tap water [(Bartram2002)]. In the EU, the limit is 100 CFU/ml which is exceeded in many water bottles even though the tap water used to fill them is clean. The Colony Forming Units per milliliter (CFU/ml) is a measure for the number of living, reproducible bacteria or fungi in a liquid sample [(Sun2017)]. The design of the bottle, how it is used, the material, whether it is used for water or other beverages, the age of the bottle, and how it is cleaned are all important factors. Improperly cleaned bottles may therefore present a contamination risk and potentially contribute to foodborne illness, especially for vulnerable groups such as children, older adults, or immunocompromised individuals. Microorganisms commonly grow in water and on surfaces in contact with water in the form of biofilms, particularly when nutrients are available and no disinfectant is present [(WHO2002)].  +The study [(Sun2017)] found that more than 20 % of reusable bottles had bacterial counts that exceeded the limit. Organic substances are referred to as heterotrophic plate count (HPC) and include mold, bacteria, and yeast.  Different countries have different limit values for HPC in tap water [(Bartram2002)]. In the EU, the limit is 100 CFU/ml which is exceeded in many water bottles even though the tap water used to fill them is clean.  The design of the bottle, how it is used, the material, whether it is used for water or other beverages, the age of the bottle, and how it is cleaned are all important factors. Improperly cleaned bottles may therefore present a contamination risk and potentially contribute to foodborne illness, especially for vulnerable groups such as children, older adults, or immunocompromised individuals. Microorganisms commonly grow in water and on surfaces in contact with water in the form of biofilms, particularly when nutrients are available and no disinfectant is present [(WHO2002)].  
  
 A major project-based advancement in smart bottles is the implementation of UV-C LED technology for internal sterilization. This addresses the hygiene problem of bacteria, yeast and mold without requiring physical filters or chemicals. It turns a standard container into a self-cleaning medical-grade device. There is a new approach in which the UV-C light spectrum is used to disinfect both the water and the bottle itself.  The spectrum range between 250 nm and 280 nm is crucial. Only this can ensure that the DNA and mRNA of the microorganisms in the water are destroyed and the organic matter is killed. It is also important that the inner surface of the bottle is reflective and that all materials exposed to the light are UV-C resistant [(Gandhi2021)]. This concept will be introduced in connection with the products of the company LARQ and ensures that organic contaminants are eliminated.   A major project-based advancement in smart bottles is the implementation of UV-C LED technology for internal sterilization. This addresses the hygiene problem of bacteria, yeast and mold without requiring physical filters or chemicals. It turns a standard container into a self-cleaning medical-grade device. There is a new approach in which the UV-C light spectrum is used to disinfect both the water and the bottle itself.  The spectrum range between 250 nm and 280 nm is crucial. Only this can ensure that the DNA and mRNA of the microorganisms in the water are destroyed and the organic matter is killed. It is also important that the inner surface of the bottle is reflective and that all materials exposed to the light are UV-C resistant [(Gandhi2021)]. This concept will be introduced in connection with the products of the company LARQ and ensures that organic contaminants are eliminated.  
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 == Environmental Impact and Sustainability Projects ==  == Environmental Impact and Sustainability Projects == 
  
-The development of smart reusable bottles is also a response to the global plastic crisis. Normal plastic water bottles have a significant environmental impact throughout their entire life cycle. Studies have shown that bottled water can have an environmental footprint up to 3 500 times greater than tap water, mainly due to plastic production, packaging, transportation, and waste management. The manufacturing of single-use plastic bottles requires large amounts of energy and fossil resources, which contributes to greenhouse gas emissions [(Grostern2021)]. In addition, many plastic bottles are not properly recycled and end up in landfills or in natural environments such as rivers and oceans. This can lead to long-term pollution, the formation of microplastics, and harm to wildlife that may ingest or become trapped in plastic waste. These consequences highlight the environmental importance of reducing single-use plastic bottles and promoting reusable and more sustainable alternatives. The use of reusable bottles is one opportunity to reduce the consumption of plastic bottles and therefore offer a way to face the environmental impact [(Nuti2023)].+The development of smart reusable bottles is also a response to the global plastic crisis. Normal plastic water bottles have a significant environmental impact throughout their entire life cycle. Studies have shown that bottled water can have an environmental footprint up to 3500 times greater than tap water, mainly due to plastic production, packaging, transportation, and waste management. The manufacturing of single-use plastic bottles requires large amounts of energy and fossil resources, which contributes to greenhouse gas emissions [(Grostern2021)]. In addition, many plastic bottles are not properly recycled and end up in landfills or in natural environments such as rivers and oceans. This can lead to long-term pollution, the formation of microplastics, and harm to wildlife that may ingest or become trapped in plastic waste. These consequences highlight the environmental importance of reducing single-use plastic bottles and promoting reusable and more sustainable alternatives. The use of reusable bottles is one opportunity to reduce the consumption of plastic bottles and therefore offer a way to face the environmental impact [(Nuti2023)].
  
 == Advanced Sensing and Future Integration ==  == Advanced Sensing and Future Integration == 
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 <caption>Product comparison</caption> <caption>Product comparison</caption>
 <WRAP box center> <WRAP box center>
-^  Photo  ^  Product  ^  Price (€)  ^  Volume (ml)  ^  Weight (g)  ^  Material  ^  Smartness  ^  App  ^  Design  ^+^  Photo  ^  Product  ^  Price (€)  ^  Volume (ml)  ^  Weight (g)  ^  Material  ^  Feature  ^  App  ^  Design  ^
 |{{:report:image_larq.jpeg?100|}}|LARQ Bottle PureVis | 90–120 | 500, 740 | 380, 500 | Stainless steel, UV-C LED for disinfection, optional filter | UV self-cleaning (10 s), hydration tracking | Yes | Minimalist cylindrical design focused on hygiene, large lid | |{{:report:image_larq.jpeg?100|}}|LARQ Bottle PureVis | 90–120 | 500, 740 | 380, 500 | Stainless steel, UV-C LED for disinfection, optional filter | UV self-cleaning (10 s), hydration tracking | Yes | Minimalist cylindrical design focused on hygiene, large lid |
 |{{:report:image_auqua_vault.jpeg?100|}}|Aqua Vault | 90–130 | 500, 750 | 420–520 |Stainless steel body, UV-C LED in lid, integrated display | UV-C sterilization cycle (3 min), screen |No | Modern smart bottle design with integrated screen in large lid | |{{:report:image_auqua_vault.jpeg?100|}}|Aqua Vault | 90–130 | 500, 750 | 420–520 |Stainless steel body, UV-C LED in lid, integrated display | UV-C sterilization cycle (3 min), screen |No | Modern smart bottle design with integrated screen in large lid |
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 <WRAP box center> <WRAP box center>
 ^ Component  ^  Size (mm)  ^  Price (€)  ^  Power Consumption (mW)  ^  Weight (g)  ^ ^ Component  ^  Size (mm)  ^  Price (€)  ^  Power Consumption (mW)  ^  Weight (g)  ^
-|TDS Sensor (SEN0244)  | 42 $\times$ 32 (cable ~800) | 23 | 10–30 | ~32 |  +|TDS Sensor (SEN0244)  | 42 x 32 (cable ~800) | 23 | 10–30 | ~32 |  
-|Pressure Sensor (FSR406)  | 43.7 $\times$ 43.7 | 13 | 2–3 | ~3 |  +|Pressure Sensor (FSR406)  | 43.7 x 43.7 | 13 | 2–3 | ~3 |  
-|UV-C LED Module  | 30 $\times$ 30 | ~30 | 0–5 (standby), 1000 (cleaning) | ~3 |  +|UV-C LED Module  | 30 x 30 | ~30 | 0–5 (standby), 1000 (cleaning) | ~3 |  
-|Accelerometer (LIS3DHTR)  | 20 $\times$ 15 $\times$ 3 | ~10 | 0,165 | 2 |  +|Accelerometer (LIS3DHTR)  | 20 x 15 x 3 | ~10 | 0,165 | 2 |  
-|Temperature Sensor (KY-015 DHT)  | 32 $\times$ 14 $\times$ 7 | 11 | 7 | 8 |  +|Temperature Sensor (KY-015 DHT)  | 32 x 14 $\times$ 7 | 11 | 7 | 8 |  
-|Piece of activated carbon  | 50 $\times$ 30 | 12 | 0 | 5 (dry), 10 (wet) |  +|Piece of activated carbon  | 50 x 30 | 12 | 0 | 5 (dry), 10 (wet) |  
-|Microcontroller (ESP32 DevKit V1)  | 56 $\times$ 28 $\times$ 13 | 13 | 792 | 20 |  +|Microcontroller (ESP32 DevKit V1)  | 56 x 28 x 13 | 13 | 792 | 20 |  
-|SSD1306 OLED Display (0.96")  | 25 $\times$ 26 | 4 | 82,5 | 4 |+|SSD1306 OLED Display (0.96")  | 25 x 26 | 4 | 82,5 | 4 |
 </WRAP> </WRAP>
 </table> </table>
 </WRAP> </WRAP>
 ==== Summary ==== ==== Summary ====
-The analysis of existing concepts, projects and smart water bottles shows that many products address individual aspects of hydration and water quality. Some focus on hydration tracking and behavioral motivation through smartphone apps, while others integrate UV-C technology for disinfection or include filtration systems. However, there is currently no product on the market that combines UV-C disinfection, water filtration, volume tracking, mineral content measurement, and a user-friendly app with gamification in one integrated system. While individual features exist across different products, they have not yet been combined into a single solution. This represents a potential market opportunity for the TRAQUA concept.  +The analysis of existing concepts, projects and smart water bottles shows that many products address individual aspects of hydration and water quality. Some focus on hydration tracking and behavioral motivation through smartphone apps, while others integrate UV-C technology for disinfection or include filtration systems. However, there is currently no product on the market that combines UV-C disinfection, water filtration, volume tracking, mineral content measurement, and a user-friendly app with gamification in one integrated system. While individual features exist across different products, they have not yet been combined into a single solution. This represents a potential market opportunity for the TRAQUA concept.  
 + 
  
 At the same time, there is a growing trend toward tracking everyday behavior and focusing more on personal health and wellbeing. People increasingly monitor activity, sleep, and nutrition using digital tools. However, hydration and especially bottle hygiene are often neglected. Studies show that reusable water bottles are frequently not cleaned adequately, which can lead to bacterial growth, and many people drink less water than recommended. Research also demonstrates that digital reminders and tracking apps can significantly increase daily water intake.  At the same time, there is a growing trend toward tracking everyday behavior and focusing more on personal health and wellbeing. People increasingly monitor activity, sleep, and nutrition using digital tools. However, hydration and especially bottle hygiene are often neglected. Studies show that reusable water bottles are frequently not cleaned adequately, which can lead to bacterial growth, and many people drink less water than recommended. Research also demonstrates that digital reminders and tracking apps can significantly increase daily water intake. 
  
 These insights highlight the potential for a smart bottle like TRAQUA that combines hydration tracking, water quality monitoring, and bottle hygiene in one system while supporting healthier habits through an intuitive and motivating app.  These insights highlight the potential for a smart bottle like TRAQUA that combines hydration tracking, water quality monitoring, and bottle hygiene in one system while supporting healthier habits through an intuitive and motivating app. 
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