DFD vs ERD. DFD and ERD are different data models that are mainly used for organizing business data for proper communication between members of a group. DFD shows how data enter a system, are transformed in that system, and how it is stored in it.
Freebase(0.00 / 0 votes)Rate this definition: Universal waste. Universal waste is a category of waste materials designated as hazardous waste, but containing materials that are very common. It is defined in 40 CFR part 273, by the United States Environmental Protection Agency but states may also have corollary regulations regarding these materials.
Sewage Sludge/Biosolids Program. âSewage Sludgeâ refers to the solids separated during the treatment of municipal wastewater. The definition includes domestic septage. âBiosolidsâ refers to treated sewage sludge that meets the EPA pollutant and pathogen requirements for land application and surface disposal. See EPAâs biosolids program at the national level for more general information and documents.