separation technologies - etec-sales.com hydrasand-eng.pdf · raw influent is fed into the base of...
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SEPARATION TECHNOLOGIES
Raw influent is fed into the base of the
sand filled, cone bottomed filter. The
flow then rises through the sand so that
clean effluent is discharged over the
upper weir.
The rising flow of the effluent is distri-
buted evenly over the whole cross sec-
tion of the filter by means of a radial
grating system.
The contaminated sand falls conti-
nuously to the bottom cone outlet from
where it is transferred by an external
airlift to the wash chamber at the top
of the unit.
Final backwashing of the sand is then
performed by a counter current of
clean water before returning to the
sand bed in the isolation box.
The dirty wash water is discharged
over the lower weir for disposal.
Operating principle
Sand filtration is nowadays a worldwide well-known technology for
separation of small suspended solid particles in water.
The Hydrasand is a self-washing cylindro-conical continuous filter with
sand bed without any shut-down for backwash.
It is designed for an optimum clarification of low concentrated effluent
and used as a finish stage before discharge or recycling.
Technical data
Model Filtration area Diameter Air consumption Washwater(m2) (m) (Nm3/hr at bars) flow
HDS 07 0,70 0,95 1,5 ca. 5 %
HDS 16 1,60 1,45 2 ca. 5 %
HDS 30 2,90 1,95 5,5 ca. 5 %
HDS 50 5,10 2,55 10 ca. 5 %
• Continuous operation and cleaning• Very simple installation• Minimum energy requirements• High filtration and sand washing efficiency• Easy maintenance with external airlift for better accessi-
bility
• No moving parts• No additional backwash equipment required• No shutdown for backwash• No possible contamination of clear water by returning
sand
Construction
Main applications• Tertiary treatment (municipal / industrial)
• Recycling of process water
• Drinking water production
• Phosphorus removal
…
Performances
Typical flow rates
Application Inlet raw water Outlet filtrates
Tertiary treatment SS 30 - 70 MG/L SS < 5 MG/L
Recycling of process water SS 40 - 100 MG/L SS 5 - 15 MG/L
Potable water 2 - 10 NTU < 0,5 NTU
Phosphorous removal P 2 - 5 MG/L P < 0,5 MG/L
Metal finishing waste treatment SS 20 - 180 MG/L SS < 5 MG/L
Paper mill waste water SS 5 - 80 MG/L SS 1 - 10 MG/L
C.71.hds.e.02.05
FranceANDRITZ SAS, Vélizy-VillacoublayPhone +33 1 39 26 05 50Fax +33 1 39 26 05 60E-mail: [email protected]
United KingdomANDRITZ Ltd, Newcastle-under-LymePhone +44 1782 56 5656Fax +44 1782 56 6130E-mail : [email protected]
USA - CanadaANDRITZ-RUTHNER, Inc., Arlington (TX)Phone +1 817 465 5611Fax +1 817 468 3961E-mail : [email protected]
For a comprehensive list of our offices all over the world or information about our products andservices, please refer to our web site www.andritz.com/ep
ChinaANDRITZ Technologies Ltd, Foshan (Guangdong Province)Phone +86 757 829 69 228Fax +86 757 829 69 208E-mail : [email protected]
SingaporeANDRITZ SINGAPORE Pte Ltd, SingaporePhone +65 6863 4465Fax +65 6863 4482E-mail : [email protected]
RussiaANDRITZ Rep. Office, MoscowPhone +7 095 956 3836, Fax +7 095 956 9087E-mail : [email protected]
BrasilANDRITZ SEPARATION Industria e Comercio deEquipamentos de Filtracao Ltda, PomerodePhone +55 47 387 8240, Fax +55 47 387 8440E-mail : [email protected]
South AfricaANDRITZ Pty Ltd, EdenvalePhone +27 11 454 3350, Fax +27 11 454 3381E-mail : [email protected]
Austria (HEAD OFFICE)ANDRITZ AG, GrazPhone +43 316 6902 2318Fax +43 316 6902 463E-mail : [email protected]