PROJECT DESCRIPTION
BACKGROUND
S.C. Celohart S.A. Zarnesti is producing cellulose by cooking wood chips in bisulfite ammonium liquors. In cooking process, wood chips are modified in cellulose at an 45-47% efficiency and organic matters such as: sugars, lignin, other organic matters. The technology flow shows the steps in which are produced these waste liquors, recovery steps and the separation steps of the cellulose from waste liquors (waste generating pollutions). For this reason, at present there are overflows and losses of black liquors that have a high content of organic matters. Waste liquors (black liquors) has a concentration of 15-17% organic matter. The present technology can assure black liquors at a concentration of 6%. The proposed pilot unit has the goal to extract from the digester black liquors at the concentration of cooking, without any dilution with water characteristics. The proposed pilot unit will extract black liquor from the digester without any quantity of water and squeezing the pulp to 50% B.D. There are premises of a good management of the residual waste.The project aim to proove an alternative efficient technology of separation of industrial waisted water with an high degree of organic matters coming from the paper production line. Through the technology will be realised the premises for decreasing water consumption, reusing efficiently black water, recovering 80% of those black waters.