Chemical and Bioprocess Engineering (CBE) is fundamentally about the ingenious transformation of matter and energy into products and services; and, more specifically, the design and operation of facilities needed to achieve this transformation in a technically-, economically- and environmentally-acceptable manner.
Examples of products include petrochemicals, (bio) pharmaceuticals, nano-materials; examples of services include energy supply (from carbon-based or renewable resources), clean air and CO2-sequestration.
As a Chemical and Bioprocess Engineer you will use the sciences as the basis for understanding these transformations; you will apply mathematical and engineering principles to realise them on the appropriate scale.