Mengfu Zhu

Pollutant and microorganism removal from water by hydrodynamic cavitation

Hydrodynamic cavitation can effectively remove organic pollutants and microorganisms from water. Organic compound degradation and water disinfection removal rate is related to reaction time and operating temperature. Removal rate can be improved by increasing the reaction time or raising the operating temperature. Under our experimental conditions, the removal rate of colority, COD and petroleum pollutants was 80.0%, 72.13% and 70.00%, respectively. In addition, Escherichia coli removal rate was higher than 99.99%. As a new water treatment process, hydrodynamic cavitation can be utilized alone or in combination with other water treatment processes, showing broad application prospects.

The Design of Dissolved Oxygen Detection System Based on C8051F020

A design of detection system about dissolved oxygen is proposed based on C8051F020 which is an integrated mixed-signal system-on-chip MCU. It can quickly and accurately detect Dissolved Oxygen (DO) in the water. The software adopts Multi-sensor data fusion and temperature compensation to eLiminate the effects of temperature and the sensor itself, enhance the measurement precision. And serial communication of RS232 is used in this system which can sent data to upper PC. The system is of high practicabiLity.