Advanced Water Treatment and Recycling Solution Case Studies for Low Water Consumption Paper Mill, 2023 PEERS Conference
Pulp & paper industry has traditionally consumed a lot of fresh water and energy. During the past decades increased attention has been paid to overall efficiency of paper mills and also to the environmental footprint that the pulp & paper industry leaves. Especially water management has become a more and more important factor in the industry. There are several reasons for an increased interest in the water sector of which major factors are cost savings, limited water resources, environmental impacts and legislation as well as pulp and paper making line and end product quality. Future trend is that energy costs will continue to rise, environmental legislation tightens all around the world and shortage from water resources culminates in many parts of the globe. This trend has led to decreasing fresh water usage in the paper industry and increase in water recycling. One could imagine that just increasing water recycling by adding treatment units in a paper mill is a relatively simple task, but in reality it is not that easy. Building most of water recycling processes and at the same time handling possible risks and pitfalls requires an overall understanding of processes, chemistry and conditions, not only in the paper industry in general, but also of the particular mill in question. A particular risk in water recycling is that certain impurities and substances will concentrate in process waters, causing serious problems in equipment, processes and product quality. With the knowhow and correct technology, water management in paper mills has many opportunities in form of water recycling.
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