The applicati on of inclined sett ling planes to increase

the sedimentati on performance is an unchallenged

technology; it’s applied in numerous plants worldwide

covering hundreds of applicati ons.

HEWiTube modules equalize the fl ow and facilitates the

phase separati on of parti cles, fl ocs or sludge.

Depending on the task, we provide designs with

diff erent angles, lamella spacings and chevron types for

a controlled pathway of down-sliding sludge.

HEWiTube modules are customized to fi t into round or

rectangular tanks. The modules are made of rigid

Polypropylene and can be placed directly into the tank

sitti ng on a supporti ng structure.

Hewitech also provides additi onal customized package

components such as support structure and HEWiTube

effl uent launders for the best benefi t of our customers.

For remote projects we off er a local self-assembly

opti on in order to reduce logisti cs and labour cost.

HEWiTube Lamella Clarifi er SeriesBoosti ng the sedimentati on effi ciency

Design Diversity · Sustainable Effi ciency · Custom-made Soluti onwww.hewitech.de

Features:

· High sett ling effi ciency

· Proven technology

· Made of rigid PP

· Up to 70°C temperature resistant

· Self-supporti ng structure

· Blue colour for potable water applicati on

· High mechanical strength

· Easy installati on of modules

· Circular or rectangular tanks

· Onsite Self-assembly opti on

· Opti onal components

· Proven technology

LS 84LS 84

This general informati on about technical data and descripti ons of our products has been put together with greatest care. We reserve the rights of any changes without further noti ce. We recommend to re-check data before using in fi nal project designs. All data without obligati ons and consequences due to non-compliance.

Water and waste water applicati on

model LS50 LS84 LS60 LS38

TypicalApplicati on

Potable waterRainwater treatmentProcess waterHumus tanks

Primary sedimentati onActi vated sludgeCombined sewer overfl ow

Effl uent PolishingPotable waterHumus tanks

Effl uent PolishingAquacultureRainwater treatment

made Polypropylene Polypropylene Polypropylene Polypropylene/PVC

Angle 45°-90° STD 55°/60° 45°-90° STD 55°/60° 60° 60°

Channel Equidistant chevron Equidistant chevron Trapezoidal fl utes Trapezoidal fl utes

Specifi c surface*~13 m2/m3 (55°)~11 m2/m3 (60°)

~7 m2/m3 (55°)~6.3 m2/m3 (60°)

11.5 m2/m3(average)

15 m2/m3(average)

Hydraulic radius 17mm 25mm 12mm 17mm

Certi fi cati on KTW / NSF KTW / NSF

Color(s)BlackBlue (KTW/NSF)

BlackBlue (KTW/NSF)

Black Black

Std dimension

Length (mm) 300 - 1500 300 - 1500 800 - 2400 800 - 2400

Width (mm) 300 - 1500 300 - 1500 300 - 600 300 - 600

Height (mm) 500 - 2000 500 - 2000 900 600

*) verti cal projected surface = eff ecti ve sett ling surface

Most engineers are using Hazen’s law as design approach for the

sett ling effi cieny.

Hazen’s law links the sett ling velocity [VS] of the target parti cle with

the fl ow rate [Q] and the installed verti cal projected surface [AP].

The Hazen-velocity ( VH = Q/AP ) is the most important design

parameter.

Parti cles with a sett ling velocity that is equal or faster than the

Hazen-velocity will be removed.

Typical Design Hazen Velocity

Feed water Hazen Product HEWiTube

Potable water 0,6 – 0,9 m/h LS50 / LS60

Primary sett ling 0,9 – 1,2 m/h LS85

MBBR effl uent 0,4 – 0,5 m/h LS50

Trickling fi lter effl uent 0,5 – 0,8 m/h LS50

Polishing 0,6 – 0,8 m/h LS50 / LS60

Aqua culture 0,4 – 0,8 m/h LS50 / LS38

Hewitech GmbH & Co KG - Am Langenhorster Bahnhof 16 - D-48607 Ochtrup/Germany +49 2553 97 02 60 · info@hewitech.de · www.hewitech.de

HEWiTube Lamella series

Design Guideline for HEWiTube Lamella sett lers