of activated sludge : Biological treatment calls upon a wide variety of micro-organisms, mainly bacteria. By absorbing soluble and suspended constituents contained in wastewater, these micro-organisms convert ... Waste water Sludge treatment ... Filtration Wastewater Sludge treatment Sludge digestion Activated sludge Anaerobic Sludge dewatering Biogas Tertiary treatment Methane fermentation Flotation ... A model plant in recovering the potential energy from industrial effluent and sludge ... Meistratzheim wastewater treatment plant (France) ... Sludge dewatering Deodorization/Venting/Evaporation Filters Flocculation/Sedimentation/Flotation Methanisation Pretreatment Biological processes...

ventilation biocontainers (figure 3). Figure 3. Cross section of a Thermoposting biocontainer The sludge is combined with the structuring by-product in order to endow the mixture with an adequate ... Sludge treatment ... Sludge treatment Composting Biofilters ... Sludge dewatering...

(acidification at the start of composting and then alkalinisation through the formation of ammonia and the removal of CO2 through aeration); even sludge produced by the physical-chemical treatment of UWW can ... Sludge treatment ... Sludge treatment Composting Dewatered sludge ... Sludge dewatering...

the organic matter in sludge is broken down in an environment lacking in air compared to the stoichiometry; thermolysis is the same process when it takes place in the absence of any exogenous oxygen. This lack ... Sludge treatment ... Sludge treatment Sludge drying Dewatered sludge Gasification Oxidation ... pyrolysis and thermolysis applied to sludge ... Sludge dewatering...

(1) that opens out into a rotating distributor (10). This distributor spreads the sludge onto the periphery and propels the suspension into the annular space between the bowl (2) and screw (3 ... Sludge treatment ... Sludge treatment Centrifugation...

sulphate and, more rarely, ferrous sulphate and aluminium salts. The Fe3+ ion is by far the most effective and the widely used reagent on organic sludge (WWTP and IWWTP biological treatment).The choice ... Sludge treatment ... Sludge treatment Sludge conditioning Flocculation...

for biological processes (thermophilic anaerobic digestion, pasteurisation – see chapter liquid sludge treatment), or responsible for thorough oxidisation of organic matter (wet oxidation, see section organic ... Sludge treatment ... Sludge treatment Anaerobic Oxidation Dewatered sludge ... Sludge dewatering...

on the discharge regulations, the available approaches being those described in tertiary treatment; thickening, dewatering; drying and/or incineration. Given that chemical industry sludges ... Waste water Sludge treatment ... Biolysis Industrial effluent treatment Chemical industries Sludge treatment Tertiary treatment ... final treatment plant ... Sludge dewatering Biological processes...

Sludge drying units must be subject to appropriate safety measures because they are the source of a number of risks, more specifically in the event of certain malfunctions. Without being exhaustive ... Sludge treatment ... Sludge treatment Sludge drying Aerobic ... Sludge dewatering...

sizing The following constitute the basic data required to define the heat balance for an incinerator: the mass flow rate of the sludge to be processed expressed in kg · h–1; the dry solids ... Sludge treatment ... Sludge treatment Sludge incineration Dewatered sludge Thermylis ... Sludge dewatering...

The spacing between the bars allows the thickening of dilute sludge from 2 g/l to 8 g/l. On an extended aeration plant type, the output dryness is between 4 and 6% with sludge directly taken from ... Sludge treatment ... GDD/GDE Sludge treatment Sludge thickening ... The GDD has a drainage screen with a progressive mesh size that optimizes Dynamic Sludge Thickening. ... direct thickening screen on biological sludge of different concentration – GDD / GDE...

and industrial wastewater sludge. key figures Reduce the downstream mechanical thickening equipment by a factor of 5 Sludge up to 2 times as concentrated on leaving treatment Reduce the number ... Sludge treatment ... Drainis Turbo Sludge treatment Sludge thickening ... Reduced polymer consumption due to stability of the sludge concentration A fully automatic process for just-in-time treatment without storage or labor intervention Limits greenhouse gas ... biological sludge thickening system including a preliminary concentration stage – Drainis™ Turbo...

will take between 30 to 120 minutes. In order to ensure that the reaction is self-sufficient in terms of heat, the amount of COD injected into the reactor must be greater than 25 g·L–1 of COD, and the sludge ... Sludge treatment ... Sludge treatment Oxidation ... Sludge dewatering Oxidation/Disinfection...

In general, the dryers used are based on those found in chemical, pharmaceutical and agri-food industries. These existing technologies have had to be adapted to properties specific to sludge. Heat ... Sludge treatment ... Sludge treatment Sludge drying Sludge dewatering Evaporis Heliantis ... Sludge dewatering...

to adapt to polymer treatment conditions. Improvements in terms of dry solids contents, compared with the conventional filter, will very much depend on the type of sludge and the type of conditioning ... Sludge treatment ... Filtration Sludge treatment Filters...

Pre-treatment: there is no longer any need (save in exceptional cases involving certain industrial sludges) to carry out bar screening/straining or grit removal in order to protect the centrifuges ... Sludge treatment ... Centrifugation Sludge treatment...

at the inlet. Figure 32. Geometric parameters bowl diameter D and LT/D ratio The diameter is characteristic of the machine ranges and will vary from 0.25 to 1.1 m in sludge treatment ... Sludge treatment ... Sludge treatment Centrifugation...

These are the type of centrifuges currently most widely used in sludge treatment applications. Their main advantage is a noticeably improvement of the cake dry solids contents that now position ... Sludge treatment ... Centrifugation Biofor Sludge treatment...

dry solids content is required (often in the region of 65%). Indeed, at this dry solids content, dried sludge has a net calorific value equivalent to that of household waste. Some projects are emerging ... Sludge treatment ... Sludge treatment Sludge drying Dewatered sludge Evaporis Heliantis ... sludge drying to an intermediate dry solids content ... Sludge dewatering...

The filtration process always comprises the following stages: flocculation using polyelectrolytes, in short contact time flocculators, or sometimes in the pipeline; flocculated sludge ... Sludge treatment ... Filtration Sludge treatment Sludge dewatering Flocculation...