This paper presents an overview of different modelling and simulation (M & S) methods used in water treatment. Special emphasis is on pulp and paper industry. In chemical water treatment, M & S is successfully used in control design. Hybrid models based on a cascade approach are needed in biological wastewater treatment to cover different operating conditions. Uncertainty handling needs to be i...

The number of external noise sources of a paper making line is typically around 80 pcs. The major ones are process and machine room ventilation and vacuum pump exhausts. The noise control targets will dictate the scope and costs of sound attenuation. Considerable cost reductions can be achieved if the noise control design starts at the early stage of a project. Additionally, depending on the no...

This paper examines North American pulp and paper company bankruptcies that occurred between 1990 and 2009. We demonstrate that shareholders suffer substantial losses (37%) during the month a bankruptcy occurs. Encouragingly, we show that financial ratios are useful in predicting firm failure and that failed firms are less profitable, more liquidity constrained and higher in debt leverage. Usin...

The pulp and paper industry depends on a long and integrated supply chain. It starts in forest harvest areas as trees and ends as multiple products used in all persons daily usage. The lead time from the first step to the last is long and it involves many steps operated by several companies and organizations. In this overview paper we describe the overall supply chain, its participants and the ...