PDA Technical Glossary
PDA Technical Reports are highly valued membership benefits because they offer expert guidance and opinions on important scientific and regulatory topics and are used as essential references by industry and regulatory authorities around the world. These reports include terms which explain the material and enhance the reader’s understanding.
The database presented here includes the glossary terms from all current technical reports. The database is searchable by keyword, topic, or by technical report. Each definition provided includes a link to the source technical report within the PDA Technical Report Portal.
(Please select "All" to restart a filtered Search)
Refine Results
Filter By Technical Report Number
Filter By Technical Report Keyword
Filter By Technical Report Category
Fed-Batch Filtration Process
A modification of the batch filtration process in which a separate (typically larger) reservoir feeds a smaller recycle tank. The retentate stream is returned to the recycle tank. (TR15)
Source:
Feed
The starting solution prior to filtration. (TR15)
Source:
Feed Pressure
The pressure measured at the inlet of the tangential flow filter device. (TR15)
Source:
Filter
A porous medium used for the separation of components in a fluid stream.(TR15)
Source:
Filtrate
Fluid that has been passed through a process step (filter). [Synonym: Permeate] (TR15) (TR26)
Source:
Flow Rate
The volumetric rate of flow of a solution, expressed in units of volume per time (e.g., L/min or gal/day). (TR15) (TR26)
Source:
Foulant
Solute or suspended solid that interacts with the membrane causing a decrease in performance (see Fouling). (TR15)
Source:
Fouling (or Clogging)
Adsorption or interaction with components in the feed stream resulting in a decrease in membrane performance. Generally, fouling can be reversed by cleaning the membrane. (TR15) The result of solutes blinding or blocking membrane pores. It is observed as a decrease in the flux (at constant pressure) or an increase in the filtration differential pressure (at constant flux). (TR26)