A hotwire sensor is used as the sensor for hotwire anemometry to measure usually turbulence level of a flow. To measure turbulence, a high frequency device such as the hotwire anemometry is needed. The most popular type is a constant temperature…

Effective waste water treatment is needed to prevent water pollution worsening. Waste water treatment can be categorized into three types, namely chemical and biological treatment. The design of supporting media for growth of biofilm in treating…