- E-bookWastewater BacteriaMichael H. Gerardi
- E-bookNitrification and Denitrification in the Activated Sludge ProcessMichael H. Gerardi
- E-bookSettleability Problems and Loss of Solids in the Activated Sludge ProcessMichael H. Gerardi
- E-bookTroubleshooting the Sequencing Batch ReactorMichael H. Gerardi
- E-bookWastewater PathogensMichael H. Gerardi
- E-bookThe Microbiology of Anaerobic DigestersMichael H. Gerardi
- E-bookThe Biology and Troubleshooting of Facultative LagoonsMichael H. Gerardi