, separation efficiency is high. The GDD/GDE screen is used upstream from a dewatering unit (figure 11). It is not always advisable to aim at maximum thickening because this could make difficult to achieve...

to be decided on merit. Nevertheless, we tend to recommend the second or third solution. sludge treatment Processes also move from mechanical dewatering systems where there are few available control parameters...

upstream from thickening sedimentation tanks and protect sludge pumps and dewatering equipment. Constructed by SUEZ, these 5 to 12 m diameter structures are usually supplied via overhead pipelines...

reactor Aerobic biological treatment (1,000 m3) Clarification tank Settling pong Sludge dewatering and storage in a skip. results obtained and client satisfaction Very high purification...

); this system produces thoroughly thickened sludge (> 30 g · L–1) that can be dewatered without any intermediate thickener. Table 3 provides magnitudes obtained for different applications: Tableau 3...

digestion (thickening, dewatering, etc.). malfunctions The main malfunctions related to filamentous organisms in a treatment plant occur in two ways: profuse filamentous development (sludge bulking...

will be a multiple hearth incinerator, a fluidised bed incinerator or a rotary furnace. This furnace must be fitted with temperature and atmosphere control devices, a dewatering system at its intake and a carbon...

. When treating excess biological sludge delivered by anaerobic digestion or by aerobic stabilisation, ozone will improve sludge dewatering and thickening, thereby having a beneficial effect on odor...

The backwash can be carried out using raw water (or non-chlorinated treated water). sludge Sludge is easily thickened and dewatered. utilisation The process and the biological reactor-filter in which...

by sedimentation or floatation. It should be noted that the sedimentation and dewatering capacity of this sludge is far better than that of activated sludge. process air velocity The process air velocity (Nm3·m–2...

as this could partly destroy the iron removal bacteria population; easier sludge treatment : the more concentrated backwash waters are particularly appropriate for thickening and dewatering. utilisation...

molasses); or through the controlled fermentation of primary sludge and by sending the resulting supernatant liquor into the anaerobic zone (beware of odours and of sludge dewatering problems...