Chemical-physical discontinuous plants are suggested for discontinuous and irregular effluent flow-rates. Chemical-physical discontinuous plants have the same treatment sections of chemical-physical continuous plants (but in sequential way):
Sedimentation / decantation
SBR (Sequencing batch reactor) biological plants
SBR biological plants are composed by systems that equalize, aerate, denitrificate and sediment the effluent in a single reactor or in more reactors with determinated operative sequenceses.
SBR plant develops a mix of bacteria cultures that are able to remove COD, BOD and Nutrients present in the treated effluents.
The main sections of SBR plants are: