By checking the box labeled ‘Enable Dry Mass Options’, the user enables a whole set of options in this process model related to the tracking of Dry Solids or Dry Matter in streams and equipment contents as well as the reporting of stream (or contents) compositions on a Dry Basis (db %). Technically, the Dry Content of a stream is the amount of material left when completely dried (or heated up to 130°C). Components typically contributing to that content are fats, fiber, ash, some carbohydrates, proteins, vitamins, minerals, etc. Once this box is checked, the application will add all flows (or amounts) of components with the property “Is Solid / Non-Volatile (Part of Dry Matter)” checked, and report the total as Dry Solids Flow (or Dry Solids Amount) on a stream dialog (or equipment contents dialog). It will also report, the ratio of “Dry Solids” to “Total” as the Dry Solids Content or DS % of the stream. The difference between the total flow (or mass content) and the dry solid flow is reported as Aqueous Flow (or “Aqueous Amount”). It is possible that the Aqueous Flow includes components other than Water (e.g. Ammonia, HCl, etc.). It is also possible, that a specific components total mass is not entirely contributing to the Dry Mass content of a stream, but only a percentage of it (the rest may be aqueous). For example, if a single component represents orange peel, only a small percentage (e.g. 25%) could be contributing to dry matter content of a stream. This property can be specified in the component’s property dialog (see,Pure Component: IDs).