search results

454 results found for:

(table 1): the DH50 has been designed for clarification and carbonate removal; the DH80 has been designed for use with UWW, this mesh being large enough to avoid any blockages Table 1...

stimated water pollution during dry weather

on country and habitat. In France lipid levels of 16 to 18 g lipid.p.e. -1.d-1 have been recorded. However, only a fraction of these lipids is fixed (a fraction that is extremely temperature...

bromium

is approximately 1 g · m–3. ...

disinfection

. The suspended solids content must be kept as low as possible and equal to no more than 1 mg·L–1. In effect, bacteria and especially viruses collect on suspended solids which can protect them from the effect...

hydrogen peroxide

. Inorganic stabilisers are added to inhibit hydrogen peroxide breakdown. This breakdown will be limited to less than 1% per year when hydrogen peroxide is correctly stored and used (stainless steel equipment...

the main membrane bioreactor families

) and the outside of the membrane (permeate side).A high cross wash velocity (1 to 4 m · s–1 – 2 to 5 bar pressure) is maintained inside the membrane to control the accumulation of matter on the surface. Chemical...

sludge blanket clarification – Pulsator®

: Minimal energy consumption Maximum inlet turbidity - 1,000 NTU Settling Velocity: 2 to 5 m/h Maximum concentration of algae at the inlet: 100,000 u/ml among our references Lima (Peru) 450...

rapid flotation with hydraulic flocculator – Aquadaf™

flotation unit Limited height : 2.5 to 4 m Turbidity up to 200 NTU among our references Haworth (USA) 700,000 m3/d TK Halli (India) 1,000,000 m3/d Apremont (France) 40,000 m3/d Macao...

physico-chemical settling tank using external sludge recirculation – Densadeg®

figures 8 to 10 times smaller footprint than traditional settling unit Sludge volume 10 times lower than ballasted floc systems Sludge from Densadeg® > 30 g.L-1 among our references...

the lowest energy sludge drying system – Evaporis™ LE

to a conventional dryers Reduction of sludge volume from 20 to 30 % (high density of dried sludge) among references Suzhou (China) – 1,200,000 PE – 11,355 kg H2O/h Aquaviva Cannes (France) – 300...

Iron removal

being very close); transcribed into practical units, the above equation becomes : and demonstrates that solubility rises as pH and TAC decrease. Note 1: when the dissolved iron...

general comments

). colloidal suspensions – the need for coagulation colloidal suspension stability Table 1 lists some matter or organisms with their dimensions and the timescale required by these particles to fall vertically...

service conditions

the cycle, essential when filtering make-up or drinking water. With some types of industrial water, this condition may not be compulsory and pressure filters can be used with high head losses (0.5 to 1.5 bar...

flotation units used in sludge thickening

equipment and very much reduced maintenance requirements. The F/M ratio constitutes the dimensioning criterion, ranging from 3 to 12 kg DS · m–2 ·h –1, depending on sludge quality and concentration (sludge...

theoretical bases for gas/liquid exchanges

; in the gas phase: Dalton’s law and the ideal gas law. Thus, for a gas mixture occupying a volume V at a temperature T and a pressure P and constituted by m1, m2… mn quantities by mass of gases having...

stripping (desorption)

water from 8 to 12 for final concentrations of 50 to 10 μg · L–1. CO2 desorption is not usually as meticulous. In a demineralisation unit, the target CO2 reduction from 70 to 10 mg · L–1 requires less...

aerobic cultures, anaerobic cultures

but that does contain nitrates. In this case, heterotrophic bacteria will obtain the oxygen they require from the nitrates, reducing these nitrates to N2 (the ‘denitrification’ reaction). More generally, table 1...

treating make-up water

physical removal of CO2 by stripping (far less expensive than fixing it on a strong anionic resin). As an aid to selecting the appropriate system, table 1 provides the results expected of each. After...

tertiary treatment

no liquid waste discharge to the environment or “zero-liquid discharge”. Please refer to table 1 for a summary of the various techniques that can be used. Table 1. Tertiary treatment processes ...

running sludge drying unit

We strongly recommend consideration be given to running a drying unit in continuous mode, at least over a 5- day period. In the case of drying units with a high evaporation capacity (above 3 t · h–1...

241 - 260 of 454 result(s)

1
…
10
11
12
13
14
15
16
…
23

Back to the top