Sugar and food industry

Filtration of thick juice in a sugar mill

Filtration of thick juice

After extracting sugar from beet pulp, a sugar factory purifies the resulting thin juice by adding lime to remove impurities and then thermally concentrates it into what is known as thick juice.

Before crystallization, the thick juice must be filtered to remove non-sugar substances and burnt sugar crystals, thereby ensuring the best possible quality of the final product.

High operating and maintenance costs

The process for filtering the thick juice, which has been in use for decades, relies on bag filters or pre-coated cartridge filters, which incur high operating costs (filter bag replacement, consumption of filter aids).

If backwash filters are used nonetheless, their backwash process has been quite limited to date, resulting in impurities in the filtrate. In addition, their filter baskets must also be replaced frequently.

OptiFil: Top-notch final product quality with low maintenance costs

The use of backwashing technology, which has been proven effective for highly viscous fluids for decades, enables the backwashing of thick juice even at sugar concentrations of up to 80 Brix.

At the same time, the system’s simple design enables savings in consumables and capital costs.

CakeFil: Fine filtration and maximum yield

For applications requiring filtration down to the submicron range, this patented cartridge pre-coat filter system provides a reliable barrier against the finest particles, as well as worry-free, fully automatic operation with dry cake discharge.

The solution: LENZING OptiFil

Fully automated filtration of thick juice throughout the entire sugar campaign.

up to 5 µm Filter fineness
up tp 80 Brixreliable backwash
> 100 unitsthick juice installations

LENZING OptiFil installation for the filtration of thick juice at sugar production

The solution: LENZING CakeFil

Fully automated filtration of thick juice throughout the entire sugar campaign.

up to submicron rangeparticle separation
zeromanual intervention
approx. zerolosses

Filtration of thick juice

Advantages of using a LENZING filtration system

Cost & space savings

Thanks to the low maintenance requirements, operating costs can be significantly reduced. The compact design also takes up very little space.

Filter fineness

The use of high-precision stainless steel mesh or filter aid-assisted precoat filtration enables fine filtration and provides perfect protection for downstream equipment while ensuring the best possible final product quality.

Reliability

These proven and efficient backwash filter systems operate reliably and fully automatically throughout the entire campaign.

LENZING OptiFil

The LENZING OptiFil system is a reliable backwash filter for the finest filtration of industrial fluids and in water treatment. Its patented backwash system enables maximum process continuity with minimum backwash quantities.

High backwash efficiency (patented)

Filter fineness down to 1 μm

Very high throughput rates

Completely closed system

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LENZING CakeFil

The LENZING CakeFil system is a process candle filter for cake building filtration with slurry or dry solids discharge. Its patented system enables highly efficient backwashing, thereby extending the service life of the filter fabric.

Filtration down to submicron range

Dry or slurry discharge

Efficient cake discharge

Unbeatable cloth service life

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