• Evaluation of introduction of Tiger Depack HS 20 in the production line of a paper mill.
  • Evaluation of the ADVANTAGES thanks to the reduction in the volume of waste pulp to send for disposal at the landfill.
  • Evaluation of the ADVANTAGES thanks to the actual checking of the quantity of pulp that can be recovered and re-introduced into the production cycle.


  • The test with Tiger Depack HS 20 provided a positive outcome, allowing a 67% reduction in waste pulp sent for disposal at the landfill. In addition, the test proved that 11% of material recovered from processing was pulp which could be re-used in the production cycle.
    Considering the fact that today, the production processes at the tested paper mill send approximately 15,000 tons of pulp for disposal each year,
    a 67% reduction in waste would mean a reduction of about 10,000 t/annum of material to be sent for disposal and the recovery of approximately 1,650 t/annum of pulp with Tiger Depack.


Tiger Depack HS 20 PPS is a separator manufactured by Cesaro Mac. Import designed to remove all types of packaging from the organic fraction of waste.

Sachets, bags, cans, tetrapak, tin plate, etc. are effortlessly removed from the flow of waste and concurrently cleaned from any organic residue stuck to them.

Tiger Depack is therefore capable of offering a dual advantage: on the one hand, it obtains a uniform organic fraction devoid of plastic contaminants, and on the other, it produces packaging cleaned of any organic residue, ready to be sent for recycling or to the landfill.

Tiger Depack operation is extremely simple. The material to separate can be loaded into the 5.4 m3 hopper supplied as standard through a wheeled loader, an orange peel grab or a conveyor belt. The feed screw located in the hopper moves the material forward, introducing it into the separation compartment. Here, a vertical shaft equipped with special vanes is capable of opening all types of packaging, whether large or small, while at the same time separating it from the waste it might contain.

The size check afforded by the sieve included in the compartment itself ensures non-conforming materials are ejected together with the waste, without contaminating the quality of the desired fraction. The dry fraction, comprising the packaging, is collected in the WASTE fraction, while the organic fraction, which has been conveyed through the screening grille, is collected in the ORGANIC fraction.



Since 2007, Tiger Depack has offered outstanding benefits for waste processors, such as biogas and composting plants, but it has also demonstrated efficient degrees of separation on other types of material.

Owing to its extreme flexibility, its use has in fact also been extended to other matrices, including dry waste from crushing-screening, consisting mostly of plastic, bags and other materials found in the Organic Fraction of Urban Solid Waste, and which after pre-treatment are normally sent for disposal at the landfill, still soaked in water and organic waste. The outstanding separation capacity of the Tiger Depack has enabled those plants which have picked it to recover 60% in weight, thereby reducing disposal costs and at the same time the re-use of this material.

Purpose of testing the Tiger Depack HS 20 on paper mill pulp

Well aware of the efficient cleaning capacity which the Tiger Depack has demonstrated on dry waste from crushing-screening in the past, the decision was made to test its capacities on paper mill pulp as well, currently sent for disposal as it is, at steep costs for the company and a waste of pulp which would instead be reintroduced into the production cycle.

From the paper mill production processes, where we conducted our tests, approximately 15,000 tons of pulp are sent for disposal each year, which still contain a good portion of pulp which could be re-used, once cleaned of all plastic and other contaminant materials.

To calculate the percentage recovery of pulp using the Tiger Depack, we determined the weight of the incoming pulp (hereinafter referred to as INPUT) and that of the outgoing waste material from the Tiger Depack at the end of the process (hereinafter referred to as WASTE). The weight of the recovered fraction (hereinafter referred to as RECOVERY) was obtained by calculating the difference.

Once the weights (in kg) of the two fractions, INPUT and WASTE, had been determined, the percentage in weight of each fraction was determined.

The table below contains the values of the weights in kilograms and as a percentage for both the INPUT and the WASTE fractions recorded by the operator who carried out the test. These are supplemented by the weights of the RECOVERY FRACTION split into two components, PULP and WATER.

Description of fraction 
 Weight in kg
Weight as a % 
 INPUT fraction
 WASTE fraction
 WATER fraction
 PULP fraction


The use of the Tiger Depack made it possible to reduce by 67% the weight of the waste pulp sent for disposal, thanks to a single process.
This means that by introducing the Tiger Depack into the production process of a typical paper mill, the company could reduce its annual waste for the landfill to just 33%.
Of this 67% (in other words 5,540 kg), 903 kg is pulp that can be recovered, i.e. re-used in the production cycle (totalling 11% of the INPUT).


1. Disposal

WITH THE TIGER DEPACK HS 20 A PAPER MILL PRODUCING APPROXIMATELY 15,000 t/annum of waste COULD no longer send the following quantity to the landfill
15,000 t/annum x 67% = 10,050 t/annum

2. Pulp recovery

WITH THE TIGER DEPACK HS 20, a weight equal to 11% of INPUT pulp could be recovered and re-used in the production cycle!!

15,000 t/annum x 11% = 1,650 t/annum

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