sedimentation and sludge contact clarification above, direct action can be taken on phase separation rates: either by rendering the expression Δρ negative by reducing the floc’s apparent density...

the description, the better the forecast. Although the same biological mechanisms apply during sludge aerobic stabilisation, the relevant processes will only be described in the liquid sludge stabilisation. ...

for temporary disinfection needs: disinfecting municipal wastewater during the swimming season only; sludge sanitising; controlling sludge bulking. Relatively little is still known about Peracetic...

; to stabilise excess sludge at wastewater treatment facilities (anaerobic digestion); to stabilise various waste, including the organic fraction of domestic waste and green waste. “Flocculating” suspended...

water with the following advantages: the certainty of achieving perfect clarification regardless of the state of the sludge or of its sludge index because the membrane can even screen out non...

-flocculation with the negative impact of additional costs for reagents and processing additional sludge output; ozonation or ozonation followed by the BIOFOR (Oxyblue) which presents a number of advantages: compactness...

can be carried out on: water taken from a river supply point; industrial wastewater. On the other hand, sludge removal, required to protect certain settling tanks against a major inflow...

By convention, the term «static» is used to designate settling tanks that do not incorporate sludge recirculation or sludge blankets although, in these units, settling takes place on a continuous...

sludge recirculation; in the first reactor, the turbine is enclosed in a sheath that ensures a good water-sludge and water-polymer mix (these being injected beneath the turbine), even mixing...

and in kg VS.m-3.d for sludge; actual contact time and the reactor’s hydraulics; the biomass concentration and method used to put the biomass in contact with the substrate are two parameters...

The CleargreenTM allows the treatment of concentrated ammonia caused by anaerobic digestion of sludge at the head of the station. This process limits the impact of digestion on the water treatment...

characterised by a clearly defined interface between the sludge mass and the supernatant liquid: this is hindered settling where the rate will be optimum within a certain area of concentration, above which, we...

Biological treatment using low-load activated sludge is utilised in most cases to remove as much biodegradable COD as possible. COD removal efficiency is typically 70 to 90% when the raw wastewater...

operating principle: coagulation-floculation & clarification : Accelerated separation of the water and flocs by passing them through lamellar modules. Sludge is collected at the bottom...

; with IWW containing fibers, grease, hydrocarbons, polymers …; with UWW or IWW for tertiary clarification and activated sludge thickening. Additionally, we need to bear in mind two important...

an overview of the water and sludge treatment system. Figure 40. Diagram showing the Rhizopur process After it has undergone pre-treatment, water is fed into a lifting unit and distributed over...

of the structure’s height. Therefore, the surface area available for sedimentation can be extended quite considerably by superimposing a large number of water/sludge separation cells on top of the structure’s height...

reactors and producing virtually no additional sludge, was the object of much research work carried out from the mid 1960's onwards. Since, various activated sludge configurations, making use of all...

As it travels through the drainage systems, some of the matter entrained in the urban wastewater and storm water settles onto the floor. Commonly designated «cleaning grit», «cleaning sludge...

mechanism and the filter has to be washed at regular intervals; in addition, rising velocities must avoid sudden fluidisation resulting in sludge being drawn away. On the other hand, the wash must allow...