The invention relates to an relates to an improved process for the treatment of wastewater comprising (a) contacting the wastewater with fast settling sludge originating from step (c) in an anaerobic zone to obtain a mixture of wastewater and sludge; (b) subjecting the mixture originating from step (a) and slow sett...

A process for the biological treatment of wastewater in which the performance of a conventional activated sludge system is improved by adding an aerobic granular biomass system in a hybrid parallel process configuration. Waste biomass and suspended material from the aerobic granular biomass system is introduced into...

Sludge originating from e.g. wastewater treatment plants manure or biomass waste streams can be serially treated by anaerobic digestion in at least three anaerobic reactors wherein a major part of the influent sludge stream is fed to a first reactor the major part of the liquid effluent of the first reactor is fed t...

The invention pertains to a method for the purification of substrate-containing wastewater in a continuous flow-through aerobic biologically activated sludge reactor B, wherein at least part of biological sludge 6 is conditioned in a selector S under anaerobic or anoxic conditions with at least part of the substrate...

In a prior art reactor set up dense aggregates of mi croorganisms are formed typically in or embedded in an extra cellular matrix. Such may relate to granules to sphere like entities having a higher viscosity than water globules a biofilm etc. The dense aggregates comprise extracellular pol ymeric substances or biop...

The invention pertains to a method for the purification of substrate-containing wastewater in a continuous flow-through aerobic biologically activated sludge reactor B, wherein at least part of biological sludge (6) is conditioned in a selector S under anaerobic or anoxic conditions with at least part of the substra...