Global distribution of maternal causes of. death. A maternal death is defined as the death of a. woman while pregnant or within 42 days of. termination of pregnancy, regardless of the. site or duration of pregnancy, from any cause. related to or aggravated by the pregnancy or. its management.
There are two types of control systems namely: 1  Open loop control systems (non-feedback control systems) 2  Closed loop control systems (feedback control systems)
Most odor control systems can be classified into one of four categories. These categories include Chemical Adsorption, Biological Oxidation, Chemical Scrubbing, and Combined Technologies. Below is a brief description of each category. Further explanation on each type can be found in their corresponding individual FAQs.