Nitor CER Cross-Flow Filtration Systems

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The Padovan NITOR Cross-Flow Filtration System was developed in 1989

as an answer to the growing issues posed by Diatomaceous Earth in

Europe.

TMCI Padovan (Italy) experimented for several years with various solutions

to these problems leading to the development of a unique system of cross-

flow filtration, which is both respectful of the specific organoleptic qualities of

wine, while also being highly efficient.

Its all in the membranes!

Nitor Cross-Flow filtration systems

- History -

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The specific advantages of using cross-flow filtration technology are:

No Diatomaceous Earth usage.

No negative D.E. flavor effects on the wine.

Minimized labor costs as systems can be automated.

Greatly reduced wine losses during filtration.

Nitor Cross-Flow filtration systems

- Main advantages -

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Limited working life of the filtration membranes.

Poor efficiency of the filtration over extended time periods especially when

filtering wines with high NTU levels and/or the presence of bentonite.

Problematic heating of the wine during filtration.

Historically there were some disadvantages seen with cross-flow filtration

technology:

Nitor Cross-Flow filtration systems

- Possible disadvantages -

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The membranes used by Padovan are specifically designed for very

long life.

Filtration efficiency is optimized by the on-board PLC, using a

“managed” approach which is the only way to efficiently filter wine.

Issues of heating during filtration are solved by the unique modular

approach to filtration construction.

TMCI Padovan Solutions

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Cross Flow….

how it works during filtration

Filtrate

flow

Filtrate

flow

Filtrate

flow

Filtrate

flow

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Cross Flow….how it works

(The back flushing/back washing process)

Filtrate

flow

Filtrate

flow

Filtrate

flow

Filtrate

flow

ALL PADOVAN CROSS FLOW FILTERS BACK WASH AUTOMATICALLY

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Membranes

Two major types seen in the wine industry:

Ceramic

Organic

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Technology and function

of the ceramic membrane elements

The demand for maximum mechanical and chemical stability with minimal flow resistance is met by a carrier with

macroporous structure made of pure a Al2O3. The actual membrane is mounted on this base material. It consists of at least

one, as a rule several, layers of high-porous ceramic with precisely defined texture, whereby the layer with the finest

porosity determines the filtration properties.

The schematic representation in conjunction with scanning electron micrographs (SEM) shows a section through carrier

and membrane. The multi-layer configuration is clearly visible. The size of the particles is decisive with respect to the

intermediate spaces, the pores.

The fundamental configuration of a ceramic membrane filter:

1 Coarse-porous (10 μm) carrier body of a Al2O3 in the form of a tube with a wall thickness of 1 – 2 mm or in the form of a

multi-channel element.

2 One or several intermediate layers of a Al2O3 with a pore size of 0.2 – 2 μm and a layer thickness around 10 –20 μm.

3 Separating layers of a Al2O3 and TiO2 with pore sizes of 0.1 – 1.4 μm (microfiltration) and 5 – 100 nm (ultrafiltration)

respectively with layer thicknesses between 0.5 and 10 μm.

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1

3

Ceramic multi-channel element

The basic module,

the ceramic multichannel element

The body consisting of high-porous ceramic

contains several round channels running

parallel to its longitudinal axis on the surface of

which the membrane is mounted.The

suspension to be clarified flows into the

channels along the membrane, whereby a

partial stream passes through the membrane

as filtrate and is discharged by the carrier

material. Due to the veryhigh permeability, the

pressure loss on passing through the carrier is

so low that it is negligiblecompared to the

pressure drop when passing through the

extremely thin membrane.

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Ceramics features

Completely inert material

Free to choose the right pore size for an optimum filtration

Operationally safe

Long lifetime

High temperature range (135 °C),can be sterilized with steam

High mechanical stability

Very good cleanability

Full pH range 0 – 14

Standard NaOH / HNO3 cleaning agents

Higher flux rates

Acid and base resistant, solvent resistant

Can be regenerated

No problems with back flushing

Wear resistant

No adsorption of valuable (color) components

Robust against pressure and temperature

Constant flux rate of filtrate over the complete life time cycle

Minimum operational costs

Short installation and start-up times, due to pre-assembling

Pore diameter of the ceramic membranes

Pore diameter Pore diameter Molecular weight

1.4 μm 1400 nm –

1.0 μm 1000 nm –

0.8 μm 800 nm –

0.5 μm 500 nm –

0.2 μm 200 nm 400 kD

0.1 μm 100 nm 200 kD

0.05 μm 50 nm 100 kD

0.02 μm 20 nm 50 kD

0.005 μm 5 nm 10 kD

Ceramic Multi-channel

E374-R E196-R

Type of Elementdiameter

(mm)

length

(mm)

no. of

channels

channel-

diameter(mm)

filtration

surface (m²)

E374-R 41 1200 37 4 0,56

E196-R 41 1200 19 6 0,43

Ceramic Multi-channel for wine

Pore diameter 0,2 mm

Type of Elementdiameter

(mm)length (mm)

no. of

channels

channel-

diameter(m

m)

filtration

surface (m²)

E208 41 1200 208 1,5 1,5

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TMCI Padovan cross flow filtration systems are available in two

versions each with distinct advantages.

Nitor CA XL Series Fully Automatic (from 160 m² to 480m² )

Nitor Smart Fully Automatic (either 20 m², 40 m², 60 m² or 80m² )

Nitor Cross-Flow filtration systems

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Nitor CAXL Series Fully Automatic

The CAXL Series has the unique advantage of being expandable without

changing the base machine configuration simply by adding one module

(162m2).

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Nitor CAXL Series

Fully Automatic…….”MODULARITY”

This modularity gives several very significant advantages:

Expandability:

CA XL series units can be expanded as standard all the way to 486m2

Reliability:

recirculation pump is used

Less than 2°C temperature pick up:

because of the use of low rotational speed pumps (1.450 rpm) giving low

linear flow rates during recirculation.

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Nitor CA XL Series Fully Automatic

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The CA XL Series has a high level of automation giving many advantages for

process efficiency

Fully automatic programmable back washing

during filtration.

Fully automated cleaning.

Programmable flow rates.

Data storage and retrieval.

PLC optimized filtration efficiency.

Programmable for end of cycle cleaning

without operator.

Selectable filtration surface area.

On-board flow and integrity testing.

Available in sizes from 162 m2 to 486 m2

Nitor CA XL Series Fully Automatic

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Nitor CA XL Series Fully Automatic

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CA XL Series advantages continued....

5 years membranes warranty.

Independent of the cellar.

Siemens PLC as standard.

Network integration possible.

Efficient filtrations at high turbidity for extended time periods.

Inert gas sparging during filtration for less than 0.1mg/l dissolved oxygen

pickup.

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Optional devices

In-line filtrate turbidity monitoring and reporting.

In-line filtrate addition dosing.

Iso-baric configuration for sparkling wine filtration.

Inlet/outlet manifolds for tank management and blending

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Filtration....

and TMCI Padovan Automation

Fully automatic and programmable yet very simple and

intuitive to operate.

PLC control with multiple levels of password security.

Automatic protection of membrane to prevent fouling.

Designed to suit your needs.

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Filtration....

and TMCI Padovan Automation

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Filtration....

and TMCI Padovan Automation

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Filtration....

and TMCI Padovan Automation

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Nitor Smart Series Fully Automatic

The Smart Series of Fully Automatic filters features the same level of

automation of the CA Series.

Designed for applications where space is at a premium.

Fully automatic like the CA series.

Fully independent of the cellar.

Can be located easily by one person.

Can be moved by forklift with built in

channels.

More filtration surface area per sq.ft of

floor surface than any other system

available.

Available as either 20, 40, 60, 80 m2

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Nitor Smart Series Fully Automatic

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Optional turbidity meter

Stainless steel cell including two light

sources and two miniaturized photocells.

One cell is directly illuminated from a

light source, while the other receives

only the reflected light from particles

suspended in the liquid.

The reflected light and the direct light

ratio is converted into a signal.

This instrument is not sensitive to colour

or temperature changes.

Graduated display indicating the degree

of turbidity in NTU units.

Turbidity reading and control unit with automatic wine

divertion when turbidity is above the prefixed value

Customized filter designs available

The strongest membrane warranty

available

On-staff Padovan Engineer

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Membranes Guarantees

Membranes which have been shipped with irreparable faults or damages during the installation of the plant, will be replaced without additional

expenses for the end user.

Membranes are guaranteed pro – rata temporis till the expiry of first of the following events.

5 -years from machine's despatch or

30.000 working hours (attested by equipment counter) or

·If one or more membranes will result damaged irreparably before the event, the residual value will be calculated pro-rata temporis and will be

discounted from the purchase value of the new ones.

It is obligatory to follow scrupulously the instruction manual and, if any doubt arises, please contact immediately the manufacturer.

Do not use detergents that have not been authorized by the manufacturer TMCI Padovan.

· Guarantee will not apply in case of capillary clogging due to limescale, coal (max quantity tolerable 0,3 g/l in the retentate), tartrates, (max

quantity tolerable 0,2 g/l in the retentate), PVPP, lees, bentonite, carboxymethyl cellulose-CMC, arabic gum, clay, mud or other inorganic

colloids or abrasive solids – glasses etc that are suspended in wine or washing water.

The juice must be without starch and cellobiose. Max turbidity at inlet 50 NTU (nota da inserire per offerte succo di mela/sidro)

· It is obligatory to follow scrupulously the instruction manual and, if any doubt arises, please contact immediately the manufacturer.

· Do not use detergents that have not been authorized by the manufacturer, chemical oxidising products use has to be authorized by TMCI

Padovan according to their accurate indications, concentrations and temperature. The use of hydrofluoric acid or concentrated phosphoric acid

is strictly forbidden. But phosphoric acid at concentration of up to 5% at temperature of up to 80°C can certainly be used without any problem,

on a routinely basis, as part of the cleaning process.

Sudden change of temperature of the liquid in the module/s has to be avoid; the maximum heating /cooling rates should be kept below 10°C

/minute.

The filter will be installed inside a building in which freezing of wet ceramic elements should never take place (minimum temperature 4°C).

The user of the filter unit is obliged to use the prefilter for all type of liquids. Remove prefilter during filtration is strictly forbidden.

Cleaning of channels by mechanical elements is absolutely forbidden. Never try to cleaning blocked channels with welding wires . If the user

did this action , the warrantee mentioned above would expire.

The ceramic modules should only be handle by person which are well trained and authorized by TMCI Padovan.