The Save All filter system available in the paper mill (included in our previous articles) minimizes the need for fresh water and enables the following fresh water consumption amount.

• -The part where fresh water is mainly used as 5-20 m3/(t paper production) is the wet-end. High-pressure showers and low-pressure felt conditioning shower located in the forming wire and press sections of the wet-end require fresh water because they are used for cleaning purposes.
• -1-6 m3/t fresh water is used as sealing water in places such as stuffing boxes in pumps and mixers, vacuum systems, conical cliners and vacuum cases.
• -1.5 – 3 m3/t as dilution and solution for fillers and additives. Fresh water is available.
• -Currently, 3-10 m3/t cooling water is used as cooling water in many factories. These waters are often included in the production process as fresh water. In addition, it is possible to circulate the indirectly heated cooling water within the system by cooling it with cooling towers or similar systems.
• -2 – 3 m3/t in units such as boiler rooms or power plants as water consumption.

The amount of fresh water used in paper production varies depending on the quality of paper produced, the nature of the raw materials used and the final quality level of each grade of paper.

In stock preparation , fresh water is generally not needed to dilute the incoming fiber feedstock, except for special papers, high-quality papers and start-up and production changes. If there are different quality filtrate waters coming out of the Save All filter, the filtrate water with the highest fiber content (cloudy filtrate) can be used in the stock preparation units. However, most of the cloudy filtrate is used in the short circulation section to reduce the consistency of the incoming fiber consistency. The need for fresh water is limited to the dilution of chemicals and the sealing water of some equipment. Most chemicals need to be diluted with fresh water before entering the paper machine system because otherwise quality problems may occur and dosages will need to be increased. For dilution of fillers, it is sometimes possible to replace fresh water with clarifed water if there is no risk of anaerobic biological activity.

The amount of fresh water used in paper production varies depending on the quality of paper produced, the nature of the raw materials used and the final quality level of each grade of paper.