On April 26, the Nanjing Science and Technology Commission and the Nanjing Intellectual Property Office organized the 2013 Nanjing University Student Patent Achievement Exhibition, hosted by Ning University and held at the Nanjing Science Hall. Over 300 student inventions were showcased, including a unique device created by Zhu Yantao, a second-year undergraduate from Hohai University. His invention, a photoelectric water intake device, can extract drinking water from the air in just one hour. The creative design captured the attention of many visitors.
Zhu Yantao, majoring in Water Resources and Hydropower Engineering, has always been passionate about problem-solving. During field trips with his professor, he often saw that even when water was available, it wasn’t always drinkable. One day, while discussing the issue, his teacher remarked, “It would be great if we could have more water in the wild.†That comment sparked an idea in Zhu’s mind. After talking with his teacher, he began exploring the concept of air-based water collection.
The process is straightforward: air enters the machine through vents, gets vaporized, and then is cooled to condense into water. The condensed water is filtered and stored for direct consumption. However, putting this idea into practice proved challenging. The device needed to work in the field without access to AC power, and the process required heating and rapid condensation, which raised issues of energy use and heat management.
To address these challenges, Zhu opted for a more energy-efficient compression refrigeration system and added solar panels to power the device. He also designed a simple cooling mechanism. Despite these efforts, funding remained a hurdle. “The motor and battery were provided by the school, but there were no ready-made parts for the cooling system,†he said. Determined, Zhu cut back on expenses, spending over 1,000 yuan on materials. Within a year, he completed the prototype.
The compact device features air vents on both sides, visible solar panels, and a 300-watt battery, allowing it to function even at night. It typically runs on solar energy and can produce 300 milliliters of water in one hour at 30°C. While practical, Zhu admits the design is still somewhat bulky. “I’m working on making it smaller and more elegant,†he said. (Reporter: Qian Xiongxiu, Wang Yinan)
Description
COD analyzer is a water quality monitoring instrument composed of COD Sensor and COD Controller for measuring COD (chemical oxygen demand) content in water. It is also called COD meter. This analyzer uses the principle of ultraviolet absorption to achieve accurate online monitoring and control of COD content in water or wastewater.
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Definition and Importance of COD
COD, the full name of Chemical Oxygen Demand, is an important indicator for measuring the degree of organic pollution in water bodies. It indicates the amount of oxidant consumed when a water sample is treated with a strong oxidant (such as potassium dichromate or potassium permanganate) under certain conditions. This amount reflects the total amount of oxidizable organic matter and some inorganic matter in the water sample. Specifically, the level of COD value can directly reflect the amount of organic pollutants in the water body. Organic matter will be biodegraded under the action of microorganisms, and this process will consume dissolved oxygen in the water. If the organic matter content in the water body is too high, it will consume a large amount of dissolved oxygen in the water, causing water quality deterioration, affecting the survival of aquatic organisms and human use. Therefore, the COD value is an important basis for evaluating the degree of water pollution, formulating water treatment plans, and environmental protection management.
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COD Analyzer & COD Meter - Daruifuno
Our digital online COD analyzer is engineered with a blend of digital communication technology, optical technology, and fieldbus technology, enabling real-time online monitoring, rapid testing, and efficient data transmission. Its design ensures speed, accuracy, and a high level of automation. The analyzer can automatically and continuously collect and store raw data from tested samples, displaying this information on the controller screen or network remote device. This facilitates real-time data transmission and processing, setting it apart from traditional COD test instruments that require cumbersome steps like sample extraction and pretreatment, along with a considerable reaction time to deliver results.
Furthermore, our digital online COD analyzer features a self-cleaning wiper that operates underwater, maintaining the instrument's efficiency over time. The analyzer's display is versatile, capable of showing not only COD values but also other critical Water Quality Parameters such as TOC (Total Organic Carbon), BOD (Biological Oxygen Demand), and turbidity. This multifaceted functionality makes it an invaluable tool for comprehensive water quality analysis.
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Conclusion
As a supplier and manufacturer of COD analyzers and COD meters, Daruifuno stands as a trusted partner in the field of water quality analysis. Committed to excellence and innovation, we provide cutting-edge solutions that cater to the evolving needs of our customers. Our COD analyzers and meters embody our dedication to precision and reliability, offering robust performance in diverse water quality monitoring scenarios.
If you are looking for a COD analyzer or meter with reliable quality, diverse functions, and favorable price, Daruifuno's COD analyzer and meter is your best choice. Our products are designed to deliver precise and dependable results, empowering you to make informed decisions about your water quality management. Contact us today to learn more about our offerings and discover how we can support your efforts in achieving precise and reliable water quality monitoring.
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Suzhou Delfino Environmental Technology Co., Ltd. , https://www.daruifuno.com